СИСТЕМА И СПОСОБ УПРАВЛЕНИЯ ИЗЛУЧЕНИЕМ И ЕГО МИНИМИЗАЦИИ

Изобретение относится к медицинской технике, а именно к системе и способу управления излучением и его минимизации. Система содержит устройство генерации излучения, монитор, устройство мониторинга внимания для генерации сигнала внимания, показывающего, когда внимание оператора направлено на монитор, модуль мониторинга внимания, сконфигурированный для определения зоны фиксации оператора, модуль активации излучения для генерации задающего сигнала излучения и активации пучка излучения оператором и блок управления. Способ включает этапы работы с системой управления. Использование заявленной группы изобретений позволяет минимизировать воздействие потенциально вредного излучения на оператора и/или пациента. 2 н. и 8 з.п. ф-лы, 14 ил.

СПЕКТРАЛЬНАЯ КОМПЬЮТЕРНАЯ ТОМОГРАФИЯ

Изобретение относится к медицинской технике, а именно к спектральной компьютерной визуализации. Система визуализации содержит стационарный гентри, поворотный гентри, установленный на стационарном гентри, рентгеновскую трубку, закрепленную на поворотном гентри, которая поворачивается и испускает полихроматическое излучение, пересекающее область исследования. Излучение имеет среднее напряжение испускания, которое поочередно переключается между, по меньшей мере, двумя разными средними напряжениями испускания в течение процедуры визуализации. Двухслойная детекторная матрица с энергетическим разрешением в режиме счета фотонов регистрирует излучение, пересекающее область исследования., и регистрирует излучение в, по меньшей мере, двух разных диапазонах напряжений. Детекторная матрица выполнена с возможностью формирования выходных сигналов с энергетическим разрешением, в зависимости как от напряжения испускания, так и от диапазона напряжений. Блок реконструкции выполняет спектральную реконструкцию ...

УСТРОЙСТВО РЕНТГЕНОВСКОГО ФОРМИРОВАНИЯ ИЗОБРЕТЕНИЙ

Заявленное изобретение относится к устройству рентгеновского формирования изображений. Заявленное устройство содержит источник рентгеновского излучения (101), решетку (103а), которая делит расходящиеся рентгеновские лучи (102), испущенные источником рентгеновского излучения, и детектор (106), который детектирует рентгеновские лучи, разделенные решеткой и проходящие через образец (104). Решетка содержит множество прозрачных объектов (114а), через которые проходят расходящиеся рентгеновские лучи, и множество непрозрачных объектов (115а), экранирующих расходящиеся рентгеновские лучи. Положение фокуса, в котором множество продолженных прямых пересекаются, и источник рентгеновского излучения расположены в разных местах. При этом продолженные прямые получаются продолжением центральных прямых, соединяющих центр каждого из множества непрозрачных объектов со стороны, обращенной к источнику рентгеновского излучения, с центром каждого из множества непрозрачных объектов со стороны, обращенной к детектору ...

УСТРОЙСТВО ГЕНЕРИРОВАНИЯ МНОЖЕСТВА РЕНТГЕНОВСКИХ ЛУЧЕЙ И УСТРОЙСТВО ФОРМИРОВАНИЯ РЕНТГЕНОВСКОГО ИЗОБРАЖЕНИЯ

Использование: для осуществления неразрушающей радиографии. Сущность: заключается в том, что устройство формирования рентгеновского изображения содержит устройство генерирования множества рентгеновских лучей, которое содержит: множественный источник электронов, который включает в себя множество источников электронов, расположенных двумерно и выводящих электроны из активируемых источников электронов путем избирательной активации множества источников электронов в соответствии с приложенными сигналами активации; блок мишени, который включает в себя множество мишеней, расположенных двумерно, так, что они располагаются противоположно множеству источников электронов, генерирует рентгеновские лучи в соответствии с облучением электронами, выводимыми из упомянутого множественного источника электронов, и выводит рентгеновские лучи с различным качеством излучения в соответствии с местами генерирования рентгеновских лучей, в котором местами генерирования и качеством излучения рентгеновских лучей из ...

СПЕКТРАЛЬНАЯ КОМПЬЮТЕРНАЯ ТОМОГРАФИЯ

... 1. Компьютерная томографическая система визуализации, содержащая: ! стационарный гентри; ! поворотный гентри, установленный с возможностью поворота на стационарном гентри; ! рентгеновскую трубку (106, T1, T2, T3), закрепленную на поворотном гентри, которая поворачивается с поворотным гентри вокруг области исследования и испускает излучение, которое пересекает область исследования, при этом трубка (106, T1, T2, T3) испускает полихроматическое излучение, имеющее среднее напряжение испускания, которое селективно поочередно переключается между, по меньшей мере, двумя разными средними напряжениями испускания в течение процедуры визуализации; ! двухслойную детекторную матрицу (116, D1, D2, D3) с энергетическим разрешением, работающую в режиме счета фотонов, которая регистрирует излучение, пересекающее область исследования, причем детекторная матрица (116, D1, D2, D3) с энергетическим разрешением разрешает по энергии зарегистрированное излучение в, по меньшей мере, двух разных диапазонах напряжений ...

СИСТЕМА И СПОСОБ УПРАВЛЕНИЯ ИЗЛУЧЕНИЕМ И ЕГО МИНИМИЗАЦИИ

... 1. Устройство излучения, содержащее:источник излучения, генерирующий пучок излучения, направляемый на объект;контроллер излучения, соединенный с источником излучения, при этом контроллер излучения содержит модуль зоны фиксации, определяющий зону фиксации оператора источника излучения, и контроллер излучения генерирует сигнал управления коллиматором частично на основании определенной зоны фиксации оператора; иколлиматор, соединенный с контроллером излучения, который основан на сигнале управления коллиматором, непрерывно фильтрует излучение, находящееся за пределами области интереса, для снижения дозы излучения от источника излучения в случае излучения, находящегося за пределами области интереса.2. Устройство по п. 1, отличающееся тем, что источник излучения содержит подвижный анод, механически перемещаемый для перемещения пучка излучения.3. Устройство по п. 2, отличающееся тем, что подвижный анод изменяет направление пучка излучения.4. Устройство по п. 1, отличающееся тем, что источник излучения ...

ПЕРЕМЕЩЕНИЕ ФОРМИРОВАТЕЛЯ ПРОФИЛЯ ПРОПУСКАНИЯ РЕНТГЕНОВСКОГО ПУЧКА

УСТРОЙСТВО И СПОСОБ РЕНТГЕНОВСКОГО ОБСЛЕДОВАНИЯ

... 1. Устройство для рентгеновского обследования, содержащее:- блок (14) рентгеновских источников, содержащий множество рентгеновских источников (15) для испускания рентгеновского излучения (24) из множества мест,- блок (18) регистрации рентгеновского излучения для регистрации рентгеновского излучения, испускаемого, по меньшей мере, одним из упомянутых рентгеновских источников (15), после прохождения зоны (19) обследования между упомянутым блоком (14) рентгеновских источников и упомянутым блоком (18) регистрации рентгеновского излучения, и для формирования регистрируемых сигналов,- блок (36) обработки для обработки сформированных регистрируемых сигналов, и- блок (26) управления для управления испусканием упомянутыми рентгеновскими источниками (15) рентгеновского излучения, последовательно, по одному или группами, с, по меньшей мере, двумя разными энергетическими спектрами таким образом, что в интервале времени, в течение которого конкретный рентгеновский источник (15a) или упомянутая группа ...

ФОРМИРОВАТЕЛЬ ПРОФИЛЯ ПЕРЕДАЧИ РЕНТГЕНОВСКОГО ПУЧКА

... 1. Система (300) формирования изображений, содержащая:источник (308) излучения, испускающий излучение из фокальной точки (312) в направлении области исследования; иформирователь (314) пучка, расположенный между фокальной точкой и областью исследования, который формирует профиль передачи рентгеновского излучения, испускаемого источником и падающего на формирователь пучка, так, что излучение, выходящее из формирователя пучка, имеет заданный профиль передачи, при этом формирователь пучка имеет центральную область (412, 600, 1002), причем формирователь пучка содержит: двумерную матрицу индивидуальных элементов (410) ослабления излучения, которые отделены друг от друга и расположены так, что плотность элементов ослабления изменяется от центральной области в направлении удаления от центральной области вдоль направления оси х, при этом индивидуальные элементы ослабления излучения полностью или, по существу, полностью ослабляют рентгеновское излучение.2. Система формирования изображений по п.1, ...

Устройство для обследования с помощью проникающего излучения

Medizinisches, mit Röntgenstrahlen arbeitendes Gerät sowie Verfahren zum Betreiben eines solchen

Die Erfindung betrifft ein medizinisches, mit Röntgenstrahlen arbeitendes Gerät, aufweisend: eine Röntgenstrahlenquelle, mit der ein Röntgenstrahl aussendbar ist, der entlang eines Zentralstrahls ein Intensitätsmaximum aufweist, eine Rotationsvorrichtung, mit der die Röntgenstrahlenquelle um ein Isozentrum rotierbar ist, wobei die Zentralachse des Röntgenstrahls exzentrisch zum Isozentrum ausgerichtet ist, sodass insbesondere bei Rotation um das Isozentrum die von unterschiedlichen Raumrichtungen ausgesendeten Zentralstrahlen tangential zu einem gedachten Kreis um das Isozentrum sind. Weiterhin betrifft die Erfindung ein Verfahren zum Betreiben eines medizinischen Geräts, aufweisend folgende Schritte: Bereitstellen einer Röntgenstrahlenquelle, mit der ein Röntgenstrahl ausgesendet wird, der entlang eines Zentralstrahls ein Intensitätsmaximum aufweist, Rotieren der Röntgenstrahlenquelle um ein Isozentrum, wobei die Zentralachse des Röntgenstrahls exzentrisch zum Isozentrum ausgerichtet ist ...

Vorrichtung und Verfahren zum Bestimmen der Position eines entlang einer zugeordneten Achse linear beweglichen Teils

Vorrichtung zum Bestimmen der Position eines entlang einer zugeordneten Achse linear beweglichen Teils (10), wobei dem zumindest einem Teil (10) ein sich in Richtung der zugeordneten Achse erstreckendes Referenzelement (12) zugeordnet ist, mit welchem das Teil (10) in mechanischen Kontakt bringbar ist, wobei an dem Referenzelement (12) ein jeweiliger Piezowandler (22) zum Erzeugen und Empfangen von Schwingungen im Material des Referenzelements (12) angeordnet ist, wobei der mechanische Kontakt zwischen dem Teil (10) und dem Referenzelement (12) durch ein Gleit- oder Rollelement (18) erzeugt wird, dadurch gekennzeichnet, dass das Referenzelement (12) und das Gleit- oder Rollelement (18) magnetisiert sind.

Verfahren zur röntgenologischen Bildverarbeitung und photographisches Bildverarbeitungsgerät dafür.

Anordnung zum Ausrichten eines Ausgleichsfilters

Filteranordnung für CT-System mit mehreren Röntgenquellen

Es wird eine Filteranordnung (30) für eine spektrale Filterung der Röntgenstrahlung eines CT-Systems (1) mit einer ersten (2) und einer zweiten Röntgenquelle (4) beschrieben. Die Filteranordnung (30) weist einen inneren Filterbereich (31) auf, welcher eine Querschnittsfläche eines Fächerstrahls (13) der ersten Röntgenquelle (2) abdeckt, und einen äußeren Filterbereich (32) auf, welcher zusammen mit dem inneren Filterbereich (31) eine größere Querschnittsfläche eines größeren Fächerstrahls (11) der zweiten Röntgenquelle (4) abdeckt. Dabei weist der innere Filterbereich (31) eine erste spektrale Filterfunktion auf. Weiterhin ist der äußere Filterbereich (32) in z-Richtung in zwei Teilbereiche (33, 34) aufgeteilt. Außerdem weist der erste Teilbereich (33) eine zweite spektrale Filterfunktion auf und weist der zweite Teilbereich (34) eine von der zweiten Filterfunktion verschiedene dritte spektrale Filterfunktion auf. Es wird überdies ein Computertomographiesystem (1) beschrieben. Daneben wird ...

X=ray diagnostic device for layer image forming - is computer tomograph with movable reference body mounting

A radiation diagnostic device produces layer images of an object through which is passed a beam whose dimension perpendicular to the plane of the layer is the same as the thickness of the layer. It enables images of the layer under investigation to be prepared without using a reference body. The object is inserted into an opening (4) in the housing. It is mounted on two supports (5, 6) between whose ends lies a gap in the housing opening. The x-rays pass through the gap. Reference bodies (7) of materials with known attenuation coefficients may be positioned in this gap. The reference body may be removed from the path of the beam by moving its mounting (23). The arrangement consists of a computer tomograph measuring attenuation values for penetrated bodies.

Verfahren und Vorrichtung zur automatischen Differenzierung von Nierensteintypen mittels Computertomographie

Die vorliegende Erfindung betrifft ein Verfahren sowie eine Vorrichtung zur automatischen Differenzierung von Nierensteintypen mittels Computertomographie. Bei dem Verfahren werden zwei Bilddatensätze zweier Computertomographie-Aufnahmen eines die Nierensteine umfassenden Objektbereiches bereitgestellt, die bei unterschiedlicher spektraler Verteilung der Röntgenstrahlung aufgezeichnet wurden. Für jedes Voxel einer interessierenden Schicht des Objektbereiches, das für Nierensteine typische Röntgenschwächungswerte aufweist, wird aus den beiden Bilddatensätzen ein Verhältnis r berechnet, das sich aus Röntgenschwächungswerten des Voxels und vorgegebenen Röntgenschwächungswerten von reinem Urin bei den unterschiedlichen spektralen Verteilungen der Röntgenstrahlung ergibt. Das jeweilige Voxel wird in Abhängigkeit von der Größe r einem von zumindest zwei Nierensteintypen zugeordnet. Das vorliegende Verfahren ermöglicht die automatische Differenzierung von Nierensteintypen mittels Computertomographie ...

COMPENSATING FILTER FOR THORAX X-RAY PHOTOGRAPH

Rotatable X-ray scan apparatus with cone beam offset

An investigative X-ray apparatus comprises a source of X-rays emitting a cone beam centred on a beam axis, a collimator to limit the extent of the beam, and a two-dimensional detector, the apparatus being mounted on a support which is rotatable about a rotation axis, the collimator having a first state in which the collimated beam is directed towards the rotation axis and the second state in which the collimated beam is offset from the rotation axis, the two-dimensional detector being movable accordingly, the beam axis being offset from the rotation axis by a lesser amount than the collimated beam in the second state. The X-ray source is no longer directed towards the isocentre as would normally be the case; the X-ray source is not orthogonal to the collimators. This is advantageous in that the entire field of the X-ray tube can be utilised. As a result, a lesser field is required of the X-ray tube and the choice of tube designs and capacities can be widened so as to optimise the performance ...

Computed tomography scanner with reduced power X-ray source and filter for providing 20-50 KeV photons

X-ray imaging apparatus and methods

An x-ray or gamma ray imaging apparatus includes a pixellated x- ray/gamma ray detector 3, an x-ray or gamma ray source 1, and a structure 6 configured to perturb the energy spectrum of radiation emitted by the source or radiation transmitted by an object 2 under test. The structure 6 comprises a repeating array of at least three adjacent regions, each region being different to immediately adjacent regions and configured to perturb the energy spectrum of the radiation differently. Image processing software executes an algorithm to determine the material type or material thickness of the body 2 through which the radiation has passed by comparing the outputs of the pixels of the detector with information stored in a database and processing said outputs of the detector according to a noise reduction algorithm that uses information from the database.

DENSITY DETERMINATION BY MEANS OF PENETRATING RAYS

COMPUTERIZED TOMOGRAPHY PROCEDURE WITH HELIXFÖRMIGER RELATIVE MOTION AND CONICAL JET

RADIATION MASK FOR A TWO-DIMENSIONAL CT DETECTOR

X-ray image sensor

Monochromatic x-ray methods and apparatus

According to some aspects, an x-ray apparatus for imaging and/or radiation therapy is provided, the x-ray apparatus comprises an electron source capable of generating electrons, at least one first target arranged to receive electrons from the electron source, the at least one first target comprising material that, in response to being irradiated by the electrons, emits broad spectrum x-ray radiation, at least one second target arranged to receive at least some of the broad spectrum x-ray radiation, the at least one second target comprising material that, in response to irradiation by broad spectrum x-ray radiation from the first target, emits monochromatic x-ray radiation, and at least one detector positioned to detect at least some of the monochromatic x-ray radiation emitted from the at least one second target. According to some aspects, a relatively low cost, relatively small footprint x-ray apparatus for generating monochromatic x-ray radiation suitable for medical/clinical purposes ...

Method for image fusion based on principal component analysis

The present invention yields with a method to fusion absorption, differential phase contrast and dark-field (scattering) signals obtained with X-ray phase contrast sensitive techniques, such as an arrangement of gratings. The new method fuses the absorption and dark-field signals by principal component analysis (PCA); further the differential phase contrast is merged into the PCA fused image to obtain edge enhancement effect. Due to its general applicability and its simplicity in usage, the suggested invention is expected to become a standard method for image fusion scheme using phase contrast imaging, in particular on medical scanners (for instance mammography), inspection at industrial production lines, non-destructive testing, and homeland security.

Methods for physiological state determination in body scans

A system for measuring muscle mass of a patient has a dual-energy radiation emission source. A radiation detector is configured to detect radiation emitted from the dual-energy radiation emission source passed through the patient. A processor has a memory with storing instructions, that when executed by the processor, perform a set of operations. The operations include receiving radiation detection data; generating a scan representation; identifying a primary fat target; determining an amount of fat in the primary fat target; comparing the amount of fat in the primary fat target to a reference; and based on the comparison, correcting an estimated amount of lean tissue to generate a corrected muscle mass value.

System and method for dual energy and/or contrast enhanced breast imaging for screening, diagnosis and biopsy

Systems and methods for x-ray imaging a patient's breast in combinations of dual energy, single-energy, mammography and tomosynthesis modes that facilitate screening for and diagnosis of breast abnormalities, particularly breast abnormalities characterized by abnormal vascularity. WO 2012/122399 PCT/US2012/028334 122 r -120 z ...

A method and system for generating an x-ray image

X-RAY EXAMINATION APPARATUS HAVING A SELECTIVE FILTER

RADIATION ABSORBING DEVICE FOR RADIOGRAPHIC APPARATUS

X-RAY RADIOGRAPHY METHOD AND SYSTEM

SPLIT FILTER CT

SYSTEMS AND METHODS FOR DIGITAL X-RAY IMAGING

Systems and methods for digital X-ray imaging are disclosed. An example portable X-ray scanner includes: an X-ray detector configured to generate digital images based on incident X-ray radiation; an X-ray tube configured to output X-ray radiation; a computing device configured to control the X-ray tube, receive the digital images from the X-ray detector, and output the digital images to a display device; a power supply configured to provide power to the X-ray tube, the X-ray detector, and the computing device; and a frame configured to: hold the X-ray detector, the computing device, and the power supply; and hold the X-ray tube such that the X-ray tube directs the X-ray radiation to the X-ray detector.

RADIOGRAPHY BACKSCATTER SHIELDS AND X-RAY IMAGING SYSTEMS INCLUDING BACKSCATTER SHIELDS

Radiography backscatter shields and X-ray imaging systems including backscatter shields are disclosed. An example X-ray backscatter shield includes: a conforming backscatter shield configured to provide shielding from Compton scatter radiation when placed in contact with an object to be scanned; and a shield frame configured to couple the backscatter shield to an X-ray source.

OPTICAL ALIGNMENT SYSTEM AND ALIGNMENT METHOD FOR RADIOGRAPHIC X-RAY IMAGING

An X-ray optical alignment system for X-ray imaging devices includes a visible-light point source and a multi-axis positioner therefor, fixedly mounted with respect to the X-ray focal spot. A mirror or beamsplitter is fixedly mounted with respect to the X-ray focal spot and disposed in the beam path of the X-ray source. The beamsplitter reflects light emitted from the light source and transmits X-rays emitted from the X-ray source. A first X-ray attenuating grid is fixedly but removably mountable with respect to the X-ray source, having a first X-ray attenuation pattern; and a second X-ray attenuating grid is adjustably mountable with respect to the first grid having a second X-ray attenuating pattern corresponding to the first X-ray attenuating pattern. When the grids are aligned, their attenuating patterns are also aligned and allow X-rays from the X-ray source and light reflected from the beamsplitter to pass therethrough.

OPTICAL ALIGNMENT SYSTEM AND ALIGNMENT METHOD FOR RADIOGRAPHIC X-RAY IMAGING

An X-ray optical alignment system for X-ray imaging devices includes a visible-light point source and a multi-axis positioner therefor, fixedly mounted with respect to the X-ray focal spot. A mirror or beamsplitter is fixedly mounted with respect to the X-ray focal spot and disposed in the beam path of the X-ray source. The beamsplitter reflects light emitted from the light source and transmits X-rays emitted from the X-ray source. A first X-ray attenuating grid is fixedly but removably mountable with respect to the X-ray source, having a first X-ray attenuation pattern; and a second X-ray attenuating grid is adjustably mountable with respect to the first grid having a second X-ray attenuating pattern corresponding to the first X-ray attenuating pattern. When the grids are aligned, their attenuating patterns are also aligned and allow X-rays from the X-ray source and light reflected from the beamsplitter to pass therethrough.

DETERMINING BODY COMPOSITION USING FAN BEAM DUAL-ENERGY X-RAY ABSORPTIOMETRY

True body composition is estimated using a dual-energy, fan-shaped distribution of x-rays and signal processing that corrects for mass magnification and other effects due to the geometry of the measurement system. To avoid inaccuracies due to beam hardening and certain other effects, the thickness of attenuating material along respective raypaths is obtained through using a four-dimensional look-up table derived experimentally from step-wedge measurements. To correct for mass magnification effects due to using a fan-shaped distribution of x-rays, another look-up table and interpolation between table entries are used to convert projected mass to true mass.

Maschine zur Herstellung von aus Kleinparkettleisten zusammengesetzten Fussbodenplatten, bei welchen die Leisten mittels eines aufgeklebten Papiers zusammengehalten sind.

Strahlenabsorbierende Vorrichtung für Röntgenapparate

Röntgen-Durchleuchtungsapparat

Multi x-ray generating apparatus and x-ray imaging apparatus

A multi X-ray generating apparatus which has a plurality of electron sources arranged two-dimensionally and targets arranged at positions opposite to the electron sources includes a multi electron source which includes a plurality of electron sources and outputs electrons from driven electron sources by selectively driving a plurality of electron sources in accordance with supplied driving signals, and a target unit which includes a plurality of targets which generate X-rays in accordance with irradiation of electrons output from the multi electron source and outputs X-rays with different radiation qualities in accordance with the generation locations of X-rays. The generation locations and radiation qualities of X-rays from the target unit are controlled by selectively driving the electron sources of the multi electron source.

System and method of mitigating low signal data for dual energy CT

A CT system includes a rotatable gantry having an opening for receiving an object to be scanned, and a controller configured to obtain kVp projection data at a first kVp, obtain kVp projection data at a second kVp, extract data from the kVp projection data obtained at the second kVp, add the extracted data to the kVp projection data obtained at the first kVp to generate mitigated projection data at the first kVp, and generate an image using the mitigated projection data at the first kVp and using the projection data obtained at the second kVp.

MAMMOGRAPHY APPARATUS

X-ray imaging device, wedge-shaped filter device and a wedge-shaped filter control method

X-ray measurement of density - is for two-component materials and uses compensating material in special screen

APPAREIL RADIOGRAPHIQUE POUR DEFINIR LA REPARTITION D'ABSORPTION DE RAYONNEMENT DANS UNE REGION D'EXAMEN PLANE

APPAREIL RADIOGRAPHIQUE DEFINISSANT LA REPARTITION D'ABSORPTION DE RAYONNEMENT DANS UNE PARTIE D'UN CORPS POUR ETABLIR UN DIAGNOSTICE, CETTE REGION ETANT SOUMISE A L'INFLUENCE D'UN RAYONNEMENT NON ATTENUE ET LA PARTIE DE CORPS SITUEE A L'EXTERIEUR DE LADITE REGION A L'INFLUENCE D'UN RAYONNEMENT ATTENUE. LE RAYONNEMENT A L'EXTERIEUR DE LA REGION INTERESSEE EST ENSUITE ATTENUE, CONFORMEMENT A L'INVENTION, A L'AIDE DE PIECES ABSORBANTES10, 12 QUI, AU COURS DE L'EXAMEN, SONT ANIMEES D'UN MOUVEMENT OSCILLANT DE VA-ET-VIENT DANS UNE DIRECTION PARALLELE A L'AXE DE ROTATION2 DE LA SOURCE DE RAYONNEMENT DE RONTGEN. DE CE FAIT, IL SE PRODUIT UNE MODULATION DE L'INTENSITE DU RAYONNEMENT, L'INTENSITE MOYENNE DU RAYONNEMENT DEVENANT DONC MOINS GRANDE, ET CELA SANS DONNER LIEU A DES EFFETS DE DURCISSEMENT DE RAYONNEMENT. APPLICATION: TOMOGRAPHES FONCTIONNANT EN COOPERATION AVEC UN ORDINATEUR.

APPAREIL DE TOMOGRAPHIE AXIALE TRANSVERSE

L'invention concerne un appareil radiologique pour tomographie axiale transverse par impression directe d'une pellicule photographique. La grille filtrante plane, à épaisseur variable, est remplacée par une feuille de cuivre d'épaisseur constante, légèrement incurvée pour être en tous points sensiblement normale au faisceau. Cette disposition permet de diminuer notablement la distance du sujet à examiner à la cassette, ce qui produit une meilleure définition du cliché et une diminution du grandissement. Tomographe particulièrement bien adapté aux examens de sujets à grandes mensurations.

Prim. filter for radiology - where geometric profile of filter can be modulated by remote control to alter contrast of image on viewing screen

METHOD FOR CORRECTING A SPECTRUM

APPARATUS OF RADIODIAGNOSIS COMPRISING OF THE MEANS TO FORM A SIGNAL OF TRANSPARENCY

Radiological system for human body examination - has head and femoral neck compensation module on rotatable pivoting support

L'invention concerne une chaine radiologique comprenant de façon classique un tube (1) à rayons X et une cassette (7) réceptrice du rayonnement entre lesquels on interpose un dispositif de filtration (3) et un objet à examiner, qui est une partie ou un ensemble de parties du corps humain. Le dispositif de filtration (3) est muni d'un module de compensation (13) par rapport à l'absorption différentielle du corps humain dans la région du crâne jusqu'au col fémoral pour un sujet assis de profil sur un siège comportant un dossier. Le module de compensation (13) est monté sur support rotatif (9) pivotant dans le plan perpendiculaire à la direction du faisceau de rayons X, et comportant deux centreurs lumineux (11, 12) donnant deux traits lumineux orthogonaux (20, 21), pour réaliser le centrage du faisceau de rayons X par rapport au sujet radiographié et par rapport à la cassette (7) réceptrice. La cassette (7) réceptrice est de la même manière monté pivotante sur un support (27), de telle manière ...

RADIOLOGY APPARATUS WITH HOMOGENIZATION FILTER.

Apparatus and Method for Digital Radiography

휴대용 엑스레이 발생 장치

... 본 발명은 휴대용 엑스레 발생 장치에 관한 것으로, 엑스레이 빔의 조사 영역을 한정할 수 있도록 엑스레이 빔을 차단하는 엑스레이 차단판을 엑스레이 튜브에 근접하게 장착하고 조리개 형태가 아닌 고정형 플레이트 형태로 장착함으로써, 엑스레이 차단판의 크기 및 중량을 작고 가볍게 할 수 있고, 이에 따라 콜리메이터의 소형화 및 경량화가 가능하고 휴대성이 향상되고, 고정형 플레이트 형상의 엑스레이 차단판을 어댑터를 통해 교체 가능하도록 함으로써, 엑스레이 차단판의 교체를 통해 엑스레이 빔의 조사 영역을 사용자의 필요에 따라 다양하게 조절할 수 있으며, 엑스레이 빔의 조사 영역을 표시하기 위한 가시광선 차단판을 경량의 합성수지 재질로 형성함으로써, 콜리메이터의 중량을 더욱 감소시킬 수 있고, 투명 합성수지 재질의 평판에 불투명 도료를 인쇄하는 방식으로 제작할 수 있어 제작이 간편하고 구조를 단순화할 수 있는 휴대용 엑스레이 발생 장치를 제공한다.

X-RAY IMAGING APPARATUS AND CONTROL METHOD THEREOF

Provided is an X-ray imaging apparatus comprising: an X-ray source irradiating an X-ray onto an object; a filtering unit controlling an amount of the X-ray irradiated to the object; and a processor setting a non-interest area by distinguishing a non-interest area from an X-ray image acquired by the X-ray irradiated to the object and controlling the filtering unit to set an amount of the X-ray irradiated to the non-interest area. The present invention provides an X-ray imaging apparatus capable of reducing risk of radiation exposure of users and objects. COPYRIGHT KIPO 2016 (220) Filter driver unit ...

PORTABLE X-RAY IMAGING APPARATUS HAVING SLIDE TYPE COLLIMATING STRUCTURE

A disclosed portable X-ray imaging apparatus can easily adjust an X-ray irradiation range and reduce the risk of the generation of rear scattering rays, and is suitable for miniaturization and weight reduction. The portable X-ray imaging apparatus according to the present invention includes a parallel protrusion part extended in parallel to an X-ray irradiation direction from a body part; and a slide type collimator provided to slide along the parallel protrusion part and having a transmission window for limiting transmission of an X-ray on a front part thereof while shielding the X-ray from the remaining part except for the transmission window. COPYRIGHT KIPO 2017 ...

METHOD FOR GENERATING A CONTRAST MEDIUM-ASSISTED X-RAY IMAGE AND X-RAY SYSTEM

método para formação de imagem de campo escuro e sistema de formação de imagem

METHOD AND DEVICE FOR COLLIMATING AN ENERGY INPUT BEAM

An irradiation method, in particular for imaging a region of investigation (2) of an object (1), comprises the steps of generating at least one energy input beam (3) with at least one energy input beam source (210), wherein the at least one energy input beam (3) comprises a plurality of individual en­ergy input beam components (3.1, 3.2, 3.3, ...), and irradi­ating the region of investigation (2) with the at least one energy input beam (3) along a plurality of projection direc­tions, wherein the energy input beam components (3.1, 3.2, 3.3, ...) are formed with at least one beam mask (211) made of an energy input shielding material with through holes. Furthermore, an imaging method and devices for irradiating or imaging the object are described.

MONOCHROMATIC X-RAY METHODS AND APPARATUS

According to some aspects, an x-ray apparatus for imaging and/or radiation therapy is provided, the x-ray apparatus comprises an electron source capable of generating electrons, at least one first target arranged to receive electrons from the electron source, the at least one first target comprising material that, in response to being irradiated by the electrons, emits broad spectrum x-ray radiation, at least one second target arranged to receive at least some of the broad spectrum x-ray radiation, the at least one second target comprising material that, in response to irradiation by broad spectrum x-ray radiation from the first target, emits monochromatic x-ray radiation, and at least one detector positioned to detect at least some of the monochromatic x-ray radiation emitted from the at least one second target. According to some aspects, a relatively low cost, relatively small footprint x-ray apparatus for generating monochromatic x-ray radiation suitable for medical/clinical purposes ...

X-RAY SCATTERING IMAGING

A method and apparatus (10) are disclosed to obtain an X-ray scattering image. In one embodiment, an intensity grating (16) is used to modulate the intensity of a beam of an X-ray radiation source (12). A detector (14) captures a raw image from the modulated intensity pattern. A scattering image can be automatically generated from the detected modulated intensity pattern. In another embodiment, both a scattering image and a phase-contrast image are obtained in a single exposure. Additionally, exact positioning of the grating is unnecessary, as the method works for any non zero distance between the grating and the detector. Finally, commercial gratings can be used. Thus, the speed and ease of implementation makes it suitable for X-ray imaging applications.

METHODS AND APPARATUS FOR SPECTRAL DIFFERENTIAL PHASE-CONTRAST CONE-BEAM CT AND HYBRID CONE-BEAM CT

DPC (differential phase contrast) images are acquired for each photon energy channel, which are called spectral DPC images. The final DPC image can be computed by summing up these spectral DPC images or just computed using certain 'color' representation algorithms to enhance desired features. In addition, with quasi-monochromatic x-ray source, the required radiation dose is substantially reduced, while the image quality of DPC images remains acceptable.

CORRECTION FOR SOURCE SWITCHING IN MULTI ENERGY SCANNER

The techniques described herein provide for correcting projection data that comprises contamination due to source switching in a multi energy scanner. The correction is a multi-neighbor correction. That is, it uses data from at least two other views of an object (e.g., generally a previous view and a subsequent view) to correct a current view of the object. The multi-neighbor correction may use one or more correction factors to determine how much data from the other two views to use to correct the current view. The correction factor(s) are determined based upon a calibration that utilizes image space data and/or projection space data of a phantom. In this way, the correction factor(s) account for source leakage that occurs in multi energy scanners.

OPTICAL FILTER FOR A QUASI-MONOCHROMATIC X-RAY AND MULTI-ENERGY X-RAY IMAGING SYSTEM WITH THE QUASI-MONOCHROMATIC X-RAY

A quasi-monochromatic x-ray optical filter according to the present invention is a device for filtering a polychromatic x-ray to obtain a quasi-monochromatic x-ray having a specific energy band. The quasi-monochromatic x-ray optical filter includes a plurality of reflecting mirrors on which respective multi-layer films for selectively reflecting x-rays based on Bragg's law are deposited, a reflecting mirror chamber for fastening the reflecting mirrors in a specific geometrical arrangement, and an alignment mechanism for aligning the chamber in a commercial x-ray generation device. Since a quasi-monochromatic x-ray multi-energy imaging system using the optical filter can clearly distinguish the spectrum regions of multi-energy from each other using a quasi-monochromatic x-ray having multi-energy, clear images can be acquired even after a small exposure in the case where adjustment is performed to use an optimal energy value.

X-RAY APPARATUS

Apparatus for X-ray bone densitometry of the hip joint in which an image of the hip joint is taken with the patient in a standing position comprising an X-ray source (24) and a detector (48) arranged on opposite sides of a patient receiving space with a height adjustable saddle (56) being provided for the patient to straddle. The appropriate height for the X-ray source and the detector are determined by the positioning of the saddle engaged with the crotch of the patient. Also disclosed is X-ray apparatus comprising a fan beam X-ray source (24) and a detector assembly (48) comprising a linear array of a plurality of detectors extending in the plane of the fan beam with means for scanning the source and the detector such that the source is scanned back and forth in a direction transverse to the plane of the fan beam and the detector array is scanned in said direction to remain in said fan beam and is incrementally indexed in a selected direction in the plane of the fan beam in a series of ...

APPARATUS AND METHOD FOR X-RAY SCATTER REDUCTION AND CORRECTION FOR FAN BEAM CT AND CONE BEAM VOLUME CT

In cone-beam volume computed tomography or similar imaging techniques, the effects of x-ray scatter are reduced through using a beam compensation filter (a bow tie filter), air gap technique, and an antiscatter grid and corrected through the use of a beam stop array combined with interpolation or convolution operation. Images are taken with the beam stop array, and a larger number of images are taken without the beam stop array. The images taken with the beam stop array are spatially interpolated to derive scatter information, which is then angularly interpolated to provide as many scatter images as there are images taken without the beam stop array. The interpolations are performed through cubic spline interpolation or any other interpolation techniques or low-pass filtering operation (convolution operation with a selected kernel). Each scatter image is subtracted from a corresponding one of the images taken without the beam stop array to provide a sequence of scatter-corrected images.

METHOD AND DEVICE FOR MEASURING THE BONE MINERAL CONTENT OF THE SKELETON

L'invention concerne un procédé et un dispositif permettant de mesurer le contenu minéral osseux du squelette dans une partie du corps humain. Cette partie du corps est exposée d'un côté à des rayons X de deux niveaux d'énergie. Les rayons sont détectés sur le côté opposé de la partie du corps, l'épaisseur de cette partie du corps est mesurée et les rayons X détectés sont analysés. Lors de l'analyse, on calcule sur la base de l'épaisseur mesurée les distances parcourues par les rayons X qui traversent les principaux constituants de la partie du corps, notamment l'eau, la graisse et le minéral osseux constituant la partie du corps, afin de déterminer le contenu de minéral osseux du squelette dans ladite partie du corps. Pour calibrer la mesure, celle-ci est réalisée avec un objet de référence (8) de composition connue. Pour déterminer les variables ayant une influence sur l'exactitude de la mesure, telles que les intensités et/ou les niveaux d'énergie moyens des rayons émis par le moyen ...

IMAGING DEVICE

An imaging device (1) for producing images from electron-hole producing radiation (2). Electron-hole pairs are produced in a radiation absorbing layer (10) comprised of a photoconductive material. This layer (10) covers an array (9) of metal oxide semiconductor pixel circuits which are incorporated into and on a crystalline semiconductor substrate (7). Each pixel circuit has a charge collecting pixel electrode, a capacitor connected to the electrode to store the charges and a charge measuring transistor circuit. A voltage source (16) provides an electric field across the radiation absorbing layer (10) between the pixel electrodes and a radiation transparent surface electrode (8) covering the radiation absorbing layer (10). A data acquisition system (20) acquires and stores data derived from charge measurements and in a preferred embodiment a computer (23) computes images from the data. The image may be displayed on a monitor (22) or printed out on a printer. Preferred embodiments provide ...

X-RAY IMAGE SENSOR

An imaging device (1) for producing images from electron-hole producing radiation (2). Electron-hole pairs are produced in a radiation absorbing layer (10) comprised of a photoconductive material. This layer (10) covers an array (9) of metal oxide semiconductor pixel circuits which are incorporated into and on a crystalline semiconductor substrate (7). Each pixel circuit has a charge collecting pixel electrode, a capacitor connected to the electrode to store the charges and a charge measuring transistor circuit. A voltage source (16) provides an electric field across the radiation absorbing layer (10) between the pixel electrodes and a radiation transparent surface electrode (8) covering the radiation absorbing layer (10). A data acquisition system (20) acquires and stores data derived from charge measurements and in a preferred embodiment a computer (23) computes images from the data. The image may be displayed on a monitor (22) or printed out on a printer. Preferred embodiments provide ...

Dual energy imaging with beam blocking during energy transition

A medical imaging method comprising generating a radiation at a first energy level by a radiation source, generating a radiation at a second energy level different from the first energy level by the radiation source, emitting the generated radiations at an output of the radiation source towards a detector, and blocking or diverting the emitted radiations during at least one intermediate phase during which the radiation source switches in a transient way from one of the first energy level and the second energy level to the other of the first energy level and the second energy level.

X-ray reflector exhibiting taper, method of making same, narrow band x-ray filters including same, devices including such filters, multispectral x-ray production via unispectral filter, and multispectral x-ray production via multispectral filter

An x-ray reflector may include: a substrate; a first layer formed on the substrate, the first layer including a relatively higher-Z material, where Z represents the atomic number; and a second layer formed on the first layer, the second layer including a relatively lower-Z material; at least one of the first layer and the second layer exhibiting a taper in an axial direction extending between a first end of the substrate and a second end of the substrate.

X-ray reflector exhibiting taper, method of making same, narrow band x-ray filters including same, devices including such filters, multispectral x-ray production via unispectral filter, and multispectral x-ray production via multispectral filter

An x-ray reflector may include: a substrate; a first layer formed on the substrate, the first layer including a relatively higher-Z material, where Z represents the atomic number; and a second layer formed on the first layer, the second layer including a relatively lower-Z material; at least one of the first layer and the second layer exhibiting a taper in an axial direction extending between a first end of the substrate and a second end of the substrate.

BONE DENSITOMETER PROVIDING ASSESSMENT OF ABSOLUTE FRACTURE RISK

A bone densitometer accepts inputs of non-bone density patient information to provide a measure of absolute fracture risk to provide a more accurate and personal assessment of osteoporosis. A simple graphical output compares this risk to standard populations.

System and method for radiographic imaging of tissue

System and method for radiographic imaging of tissue using a non-radioactive, radio-opaque imaging agent that accumulates intracellularly in tissue in proportion to its functional, or physiological, activity. In one embodiment, the imaging agent is a cell-membrane permeable, radio-opaque, high affinity ligand for the intracellular enzyme hexokinase. The imaging agent is administered to a patient, and after an accumulation interval, radiographic images are acquired. The imaging agent preferentially accumulates in malignant tissue and increases its radio-opacity because of its elevated glucose metabolic rate relative to benign and normal tissue. The tissue being examined is transilluminated by X-ray beams with preselected different mean energy spectra, and a separate radiographic image is acquired during transillumination by each beam. An image processing system performs a weighted combination of the acquired images to produce a single displayed image. The image processing procedure isolates ...

X-ray examination apparatus

The invention relates to an X-ray examination apparatus which includes an X-ray source, an X-ray detector, absorption means arranged between the X-ray source and the X-ray detector, a control unit for adjusting the absorption degree of the absorption means, an image processing unit and a display unit. In order to perform an automatic adjustment of the absorption means, the absorption degree therein is optimized in dependence on user-specific parameters (r) and/or apparatus-specific parameters (s) and/or structure parameters (C) and/or parameters (r) classifying the subject matter of the image.

Determining body composition using fan beam dual-energy x-ray absorptiometry

True body composition is estimated using a dual-energy, fan-shaped distribution of x-rays and signal processing that corrects for mass magnification and other effects due to the geometry of the measurement system. To avoid inaccuracies due to beam hardening and certain other effects, the thickness of attenuating material along respective raypaths is obtained through using a four-dimensional look-up table derived experimentally from step-wedge measurements. To correct for mass magnification effects due to using a fan-shaped distribution of x-rays, another look-up table and interpolation between table entries are used to convert projected mass to true mass.

Method for estimating and correcting scattering in mammography

A method for correcting at least one image of an object obtained with a mammography system is provided. The method comprises: acquiring a pre-exposure image of an object to determine the acquisition conditions for main images, the pre-exposure image comprising regions corresponding to the projection of radio-opaque elements, wherein a mask comprising radio-opaque elements is in an acquisition position; acquiring the main images resulting from the passing through the object of X-rays at higher doses than the dose used for acquisition of the pre-exposure image, wherein the mask comprising radio-opaque elements is in a retracted position; extracting regions from the pre-exposure image which correspond to the projection of radio-opaque elements; and determining the contribution of X-ray scatter at every point of the at least one image of the object, on the basis of the regions extracted from the pre-exposure image.

Radiation beam intensity profile shaper

An imaging system (500) includes a focal spot (510) that rotates along a path around an examination region (506) and emits radiation. A collimator (512) collimates the radiation, producing a radiation beam (516) that traverses a field of view (520) of the examination region and a subject or object therein. A detector array (522), located opposite the radiation source, across the examination region, detects radiation traversing the field of view and produces a signal indicative of the detected radiation. A beam shaper (524), located between the radiation source and the collimator, rotates in coordination with the focal spot and defines an intensity profile of the radiation beam. The beam shaper includes a plurality of elongate x-ray absorbing elements (606) arranged parallel to each other along a transverse direction with respect to a direction of the beam, separated from each other by a plurality of material free regions (604).

Grating-based differential phase contrast imaging

An imaging system (200) is configured for grating-based DPCI. The imaging system includes a rotating gantry (204) that rotates around an examination region, a radiation source (208), supported by the rotating gantry, that emits radiation that traverses the examination region, a detector array (212), supported by the rotating gantry, that detects radiation that traverses the examination region, and an interferometer, supported by the rotating gantry, which includes a source grating (214), a phase grating (218), and an absorber grating (220). At least one of the phase grating or the absorber grating continuously translates with respect to the other during an integration period and the detector generates and outputs an electrical signal indicative of the detected radiation, wherein the electrical signal includes an absorption component, a coherence component and a phase component.

Dual-Energy Cone-Beam CT Scanning

A CT scanning apparatus includes a control apparatus arranged to cause a first rotation of a gantry and trigger an x-ray source to emit x-radiation at a first x-ray energy when an angular encoder reports that the gantry is at each of multiple predetermined angular locations, and cause a second rotation of the gantry and trigger the x-ray source to emit x-radiation at a second x-ray energy differing from the first x-ray energy when the angular encoder reports that the gantry is at each of the same predetermined angular locations. An image processing means receives the projection images and reconstructs them into a volumetric image. A support couch is provided for the patient, and to minimize the likelihood of movement artifacts, the support couch includes a patient immobilisation system such as an evacuatable bead bag, bite post, or stereotactic frames, or the like.

Image-guided radiation treatment with imaging data using imaging radiation at different energy levels

A method of image-guided radiation treatment is described. The method may include acquiring a pre-treatment image of a patient and generating a first set of image data of part or all of the patient using imaging radiation at a first energy level and a second set of image data of part or all of the patient using imaging radiation at a second energy level. The method may also include processing the first and second sets of image data to generate an enhanced image, wherein the enhanced image comprises a combination of the first and second sets of image data, and wherein part or all of the image data comprises the target. The method may also include registering the enhanced image with the pre-treatment image to obtain a registration result and tracking movement and position of the target using the registration result to generate tracking information.

IMAGE-GUIDED RADIATION TREATMENT WITH IMAGING DATA USING IMAGING RADIATION AT DIFFERENT ENERGY LEVELS

A method of image-guided radiation treatment is described. The method may include acquiring digitally reconstructed radiographs (DRRs) of a patient and generating a first set of image data of part or all of the patient using imaging radiation at a first energy level and a second set of image data of part or all of the patient using imaging radiation at a second energy level. The method may also include processing the first and second sets of image data to generate an enhanced image, wherein the enhanced image comprises a combination of the first and second sets of image data, and wherein part or all of the image data comprises the target. The method may also include registering the enhanced image with the DRRs to obtain a registration result, tracking movement and position of the target using the registration result to generating tracking information. 1. A method of image-guided radiation , the method comprising:acquiring digitally reconstructed radiographs (DRRs) of a target of a patient;generating a first set of image data of part or all of the target using imaging radiation at a first energy level and a second set of image data of part or all of the target using imaging radiation at a second energy level;processing the first and second sets of image data to generate an enhanced image, wherein the enhanced image comprises a combination of the first and second sets of image data, wherein part or all of the image data comprises the target;registering the enhanced image with the DRRs to obtain a registration result;tracking the target using the registration result to generating tracking information; anddirecting treatment delivery to the target based on the tracking information obtained from the enhanced image.2. The method of claim 1 , wherein the tracking information obtained from the enhanced image comprises a position of the target.3. The method of claim 1 , wherein directing treatment delivery comprises:generating a treatment delivery beam using a treatment ...

PHASE CONTRAST IMAGING APPARATUS

An x-ray imaging system includes an x-ray source, an x-ray detector including a plurality of detector strips arranged in a first direction of the x-ray detector. Each detector strip includes a plurality of detector pixels arranged in a second direction of the x-ray detector. A phase grating and a plurality of analyzer gratings including grating slits are disposed between the x-ray source and detectors. The x-ray source and the x-ray detector are adapted to perform a scanning movement in relation to an object in the first direction, in order to scan the object. Each of the plurality of analyzer gratings is arranged in association with a respective detector strip with the grating slits arranged in the second direction. The grating slits of the analyzer gratings of the detector strips are offset relative to each other in the second direction.

X-ray imaging system allowing the correction of the scatter radiation and precise detection of the distance between the source and the detector

The invention relates to an X-ray imaging system wherein images are obtained using an X-ray blocking element, the system comprising means for determining a position of the detector (40) on the basis of coordinates of projected patterns of the blocker (20, 220) in an image in order to especially be able to perform a calibration and/or correct the contribution of the scatter radiation in a radiographic image obtained by the system.

Radiation imaging apparatus, computed tomography apparatus, and radiation imaging method

Disclosed are a radiation imaging apparatus, a computed tomography apparatus, and a radiation imaging method using the same. The radiation imaging apparatus includes a radiation emitter configured to emit radiation to an object while moving around the object, a radiation detector configured to detect radiation emitted from the radiation emitter and to change the detected radiation into an electric signal to thereby store the electric signal, and an irradiation controller to control the radiation emitter such that radiation is emitted to the object in at least one position or zone around the object and such that the radiation emitter stops emission of radiation to the object in a position or zone corresponding to the at least one position or zone.

Filter system and method for imaging a subject

A method and system is disclosed for acquiring image data of a subject. The image data can be collected with an imaging system using various selection techniques. The selection techniques may be used to assist in generating selected images for viewing. Selection techniques may include moving a filter to filter a selected portion of an imaging beam.

Computer-implemented methods and systems for provision of a correction algorithm for an x-ray image and for correction of an x-ray image, x-ray facility, computer program, and electronically readable data medium

A computer-implemented method for provision of a correction algorithm for an x-ray image that was recorded with an x-ray source emitting an x-ray radiation field, a filter facility spatially modulating an x-ray radiation dose, and an x-ray detector is provided. The correction algorithm includes a trained first processing function that, from first input data that includes at least one first physical parameter describing the x-ray radiation field and/or the measurement and at least one second physical parameter describing the spatial modulation of the filter facility, determines first output data. The first output data includes a mask for brightness compensation with regard to the spatial modulation of the filter facility in the x-ray image. The method includes providing first training data, providing an autoencoder for masks, and training of the autoencoder using the first training data. The method also includes determining an assignment rule, and providing the trained first processing function ...

Medical imaging method varying collimation of emitted radiation beam

This invention relates to a medical imaging method comprising: emitting (S1) a radiation beam from a radiation source of a rotating gantry, preferably of a rotating C-arm, on a volume of interest, varying collimation (S2, S7) of said emitted radiation beam so as to change at least part-time a field of view of said emitted radiation beam so that there are at least a first part and a second part of said volume of interest such that, when said first part of said volume of interest is imaged, said second part of said volume of interest is shuttered, and when said second part of said volume of interest is imaged, said first part of said volume of interest is shuttered.

X-ray computer tomography apparatus with pre-scan to optimise timing of main scan following administration of a contrast medium

An X-ray computer tomography apparatus (1, 2) which performs prep scanning prior to main scanning to acquire information for use in reconstruction of a tomographic image for diagnosis, the main scanning including rotary scanning around a rotation axis, and axial scanning along the rotation axis, the X-ray computer tomography apparatus (1, 2) includes: determination unit (21) which determines a speed based on a change of a characteristic amount concerning information obtained by the prep scanning; and a unit which controls, to the determined speed, a speed of the axial scanning in a period from the start to the completion of the main scanning.

An apparatus for slit radiography

X-ray examination apparatus and filter suitable for use therein

By using an X-ray filter filled with a liquid, having a flexible wall between the X-ray source and the detector in an X-ray examination apparatus, spatial brightness variations in an X-ray image caused by vignetting, can be obviated. The filter thickness is adjustable by the supply and the discharge of a liquid, the filter preserving a quadratic thickness variation from the centre to the edges. ...

SYSTEMS AND METHODS FOR X-RAY IMAGING TISSUE SPECIMENS

X-RAY IMAGE SUBTRACTING METHOD AND DEVICE

ФОРМИРОВАНИЕ ДИФФЕРЕНЦИАЛЬНЫХ ФАЗО-КОНТРАСТНЫХ ИЗОБРАЖЕНИЙ С УВЕЛИЧЕННЫМ ДИНАМИЧЕСКИМ ДИАПАЗОНОМ

Изобретение относится к средствам формирования рентгеновских дифференциальных фазоконтрастных изображений. Для того чтобы улучшить информацию, полученную формированием фазоконтрастных изображений, анализаторная дифракционная решетка (34) для формирования рентгеновских дифференциальных фазоконтрастных изображений снабжена структурой (48) поглощения. Структура поглощения содержит первое множество (50) первых участков (52) с первым ослаблением рентгеновского излучения и второе множество (54) вторых участков (56) с вторым ослаблением рентгеновского излучения. При этом второе ослабление рентгеновского излучения меньше, чем первое ослабление рентгеновского излучения, а первые и вторые участки скомпонованы периодически перемежающимся образом. Третье множество (58) третьих участков (60) имеет третье ослабление рентгеновского излучения, которое находится в диапазоне от второго ослабления рентгеновского излучения до первого ослабления рентгеновского излучения, при этом каждый второй из первого или ...

Device and method to generate x-ray radiation with two spectra

In a device, a method and a computer-readable storage medium encoded with programming instructions to generate x-ray radiation to examine a subject with at least two spectra respectively of x-ray radiation of different average photon energies, an x-ray tube is used that has at least two foci that are different from one another, and the device is operated to switch between the foci in order to generate x-ray radiation. A spectrum of x-ray radiation respectively emanates from each focus. A filter is associated with the x-ray tube such that the spectrum of x-ray radiation emanating from one of the foci is not filtered by the filter and the spectrum of x-ray radiation emanating from another of the foci is filtered by the filter, such that the average photon energy of the filtered spectrum of x-ray radiation is higher than the average photon energy of the unfiltered spectrum of x-ray radiation.

Radiological image detection apparatus, radiographic apparatus and radiographic system

A radiological image detection apparatus includes a first grating unit, a grating pattern unit, a radiological image detector, and an anti-scatter grating. The grating pattern unit has a period that substantially coincides with a pattern period of a radiological image formed by radiation having passed through the first grating unit. The radiological image detector detects the radiological image masked by the grating pattern unit. The anti-scatter grating is arranged on a path of the radiation incident onto the radiological image detector and removes scattered radiation. A smoothing process is performed for at least one of a surface and a backside of the anti-scatter grating intersecting with a traveling direction of the radiation.

Method for obtaining image data with the aid of an x-ray image recording apparatus having a filter and an x-ray image recording apparatus

A method to optimally set a position of a form filter in an x-ray image recording apparatus is proposed. The x-ray image recording apparatus has an x-ray radiation source and an x-ray radiation detector. An x-ray image is firstly recorded in a first position of the form filter. A new position of the filter is then calculated and automatically set with the aid of the x-ray image. A new x-ray image is then recorded. With a minimal dose of a patient, the method enables low contrast images to be recorded for a minimal main dose of the patient, in particular in a sequence.

Differential phase contrast x-ray imaging system and components

A differential phase contrast X-ray imaging system includes an X-ray illumination system, a beam splitter arranged in an optical path of the X-ray illumination system, and a detection system arranged in an optical path to detect X-rays after passing through the beam splitter.

Thoracic diagnosis assistance system and computer readable storage medium

Provided is a thoracic diagnosis assistance system. The system includes, an imaging unit, an extracting unit, a region dividing unit, an analysis unit and a display unit. The extraction unit extracts a lung field region from the plurality of successive image frames generated by the imaging unit. The region dividing unit divides the lung field region extracted by the extraction unit into a plurality of sub-regions and correlates the sub-regions among the plurality of image frames. The analysis unit performs an analysis of the sub-regions to calculate an inspiratory feature quantity and an expiratory feature quantity and to calculate a value of a ratio of the calculated inspiratory feature quantity to expiratory feature quantity and creates a histogram of the calculated ratio value. The display unit displays the histogram.

Monochromatic x-ray methods and apparatus

According to some aspects, an x-ray apparatus for imaging and/or radiation therapy is provided, the x-ray apparatus comprises an electron source capable of generating electrons, at least one first target arranged to receive electrons from the electron source, the at least one first target comprising material that, in response to being irradiated by the electrons, emits broad spectrum x-ray radiation, at least one second target arranged to receive at least some of the broad spectrum x-ray radiation, the at least one second target comprising material that, in response to irradiation by broad spectrum x-ray radiation from the first target, emits monochromatic x-ray radiation, and at least one detector positioned to detect at least some of to the monochromatic x-ray radiation emitted from the at least one second target. According to some aspects, a relatively low cost, relatively small footprint x-ray apparatus for generating monochromatic x-ray radiation suitable for medical/clinical purposes and appropriate for use in existing medical facilities such as hospitals and/or small clinical settings is provided.

POST-PATIENT DYNAMIC FILTER FOR COMPUTED TOMOGRAPHY (CT)

An imaging system includes a radiation source () configured to rotate around an examination region about a z-axis and having a focal spot that emits a radiation beam that traverses the examination region. The system further includes a radiation sensitive detector array () with a plurality of detector pixels that detects radiation traversing the examination region and generates projection data indicative of the detected radiation. The system further includes a dynamic post-patient filter () including one or more filter segments (). The filter is configured to selectively and dynamically move in front of the detector array between the detector array and the examination region and into and out of a path of the radiation beam illuminating the detector pixels during scanning an object or subject based on a shape of the object or subject, thereby filtering unattenuated radiation and radiation traversing a periphery of the object or subject. 1. An imaging system , comprising:a radiation source configured to rotate around an examination region about a z-axis includes a focal spot that emits a radiation beam that traverses the examination region;a radiation sensitive detector array includes a plurality of detector pixels that detects radiation traversing the examination region and generates projection data indicative of the detected radiation; anda dynamic post-patient filter including one or more filter segments configured to selectively and dynamically move in front of the detector array between the detector array and the examination region and into and out of a path of the radiation beam illuminating the detector pixels during scanning an object or subject based on a shape of the object or subject, thereby filtering unattenuated radiation and radiation traversing a periphery of the object or subject.2. The system of claim 1 , further comprising:at least one motor for moving the one or more filter segments; anda controller that controls the motor to dynamically move the ...

Grated collimation system for computed tomography

A collimator for a computed tomography imaging device can include first and second leaves positioned on opposing sides of a primary radiation delivery window. The first and second leaves can include first and second gratings having a plurality of attenuating members with a plurality of secondary radiation delivery windows extending between adjacent attenuating members.

Method and apparatus for filtering radio-frequency electromagnetic beams and irradiation apparatus or device for irradiating an object

A method and an apparatus for filtering radio-frequency electromagnetic beams, in particular x-rays, include a fluid container containing a ferrofluid which at least partially absorbs the electromagnetic beams. A distribution of the ferrofluid within the fluid container can be varied by using an applied magnetic gradient field. An irradiation apparatus and a device for irradiating an object are also provided.

PORTABLE DUAL-ENERGY RADIOGRAPHIC X-RAY PERIHPHERAL BONE DENSITY AND IMAGING SYSTEMS AND METHODS

Devices, tools, systems and methods for X-ray bone density measurement and imaging for radiography, fluoroscopy and related procedures. Portable, efficient peripheral bone density measurement and/or high resolution imaging and/or small field digital radiography of bone and other tissue, including tissue in the peripheral skeletal system, such as the arm, forearm, leg, hand and/or foot. 1. A portable , dual-energy radiographic x-ray imaging and bone density measuring system , comprising:an X-ray source configured to emit an X-ray beam through a filter positioning mechanism, the filter positioning mechanism comprising a high energy filter, a low energy filter, and a shutter configured to block transmission of the X-ray beam;an X-ray imaging detector;a housing positioning the X-ray source at a distance from the X-ray beam detector, wherein the housing is configured for positioning a forearm between the X-ray source and the X-ray beam detector;an embedded system configured to activate the X-ray source and to control the position of the filter positioning mechanism and imaging data acquisition.2. The system of claim 1 , wherein the X-ray source is active for at most 2 seconds per exposure.3. The system of claim 1 , wherein the high energy filter provides a high energy component above 40-50 kV for transmission through the filter positioning mechanism.4. The system of claim 1 , wherein the high energy filter comprises Copper and at least one of the group consisting of Tin and Rhodium.5. The system of claim 1 , wherein the low energy filter limits transmission of energy below 40-50 kV through the filter positioning mechanism.6. The system of claim 1 , wherein the low energy filter comprises Aluminum and at least one type of material having a K-edge absorption at least 40 kV.7. The system of claim 1 , wherein the low energy filter comprises at least one type of material having a K-edge absorption of at least 40 kV is selected from the group consisting of Cerium claim 1 , ...

Method for generating a contrast medium-assisted x-ray image and x-ray system

A method is disclosed for generating at least one x-ray image of a patient having incorporated contrast medium, using x-rays having an energy spectrum and an x-ray detector. The energy spectrum is modified by at least one first filter arranged in the beam path in front of the patient, the patient absorbing a dose in order to generate detector data for the x-ray image and the x-ray image having a CNR value which represents the ratio of the maximum contrast in the image to the noise. The energy spectrum and contrast medium are matched to each other, taking into account the thickness of the patient to be x-rayed, in such a way that an optimization criterion which is taken from an x-ray image that is generated or simulated by way of trials is maximized. Furthermore, an x-ray system is also disclosed.

Method and apparatus for correcting artifacts during generation of x-ray images, in particular computed tomography, or radiography by means of temporal modulation of primary radiation

Artifacts caused by scattered radiation when generating X-ray images of objects are corrected using a temporally alterable modulation of the primary radiation. A respective set of originally amplitude-modulated modulation projections of the object is generated and a respective scattered image allocated to the respective modulation projections is calculated. The method is particularly suitable for fast CT scans.

Inverse geometry volume computed tomography systems

The present invention pertains to an apparatus and method for inverse geometry volume computed tomography medical imaging of a human patient. A plurality of stationary x-ray sources for producing x-ray radiation are used. A rotating collimator located between the plurality of x-ray sources and the human patient is also used. A rotating detector can also be used.

GRATED COLLIMATION SYSTEM FOR COMPUTED TOMOGRAPHY

A collimator for a computed tomography imaging device can include first and second leaves positioned on opposing sides of a primary radiation delivery window. The first and second leaves can include first and second gratings having a plurality of attenuating members with a plurality of secondary radiation delivery windows extending between adjacent attenuating members. 1. A collimator for a computed x-ray tomography imaging device , comprising a first grating and a second grating positioned on opposing sides of a primary radiation delivery window , the first and second gratings being part of separate first and second leaves , each of the first and second gratings comprising a plurality of attenuating members with a plurality of secondary radiation delivery windows extending between adjacent attenuating members of the first grating and the second grating , respectively , and wherein the first and second gratings are each adapted to receive x-rays from a single x-ray source.2. The collimator of claim 1 , wherein a width of each secondary windows is less than a width of the primary window.3. The collimator of claim 1 , wherein a total area of each of the plurality of secondary windows is less than a total area of the primary window.4. The collimator of claim 1 , wherein a width of each secondary window is proportional to a distance between the secondary window and the primary window.5. The collimator of claim 4 , wherein the width of each secondary window is linearly proportional to the distance between the secondary window and the primary window.6. The collimator of claim 1 , wherein a width of each attenuating member is proportional to a distance between the attenuating member and the primary window.7. The collimator of claim 6 , wherein the width of each attenuating member is linearly proportional to the distance between the attenuating member and the primary window.8. The collimator of claim 1 , wherein the secondary windows comprise open passages extending through ...

COMPUTER TOMOGRAPH

A computer tomograph () for mammographic x-ray imaging includes a MBFEX tube () and a flat-bed x-ray detector (). Cathodes () are arranged in a fixed manner in rows in the MBFEX tube (), the cathodes () being provided for the field emission of electrons. Geometry, radiation density and wavelength range of an x-ray beam (b) can be set. The MBFEX tube () is movable parallel (z) to the flat-bed x-ray detector (). The flat bed x-ray detector () includes a moveable x-ray screen (), the opening of which can be set. Using the x-ray screen (), an imaging area (A) on the detector surface (D) of the flat-bed x-ray detector () can be selected and moved. Compared to conventional computer tomographs having rotating x-ray components, the computer tomograph () has a lighter and more compact design, with which a particularly small focal spot size is achieved. 1. A computer tomograph for mammographic x-ray imaging , comprising: a MBFEX tube and a flat-bed x-ray detector , wherein a plurality of cathodes is arranged in a fixed manner in rows in the MBFEX tube , the cathodes being provided for field emission of electrons , and geometry , radiation density and wavelength range of an x-ray beam (b) are set , the MBFEX tube are movable parallel to the flat-bed x-ray detector , the flat bed x-ray detector comprising a moveable x-ray screen , the opening of the moveable x-ray screen is set , and , using the x-ray screen , an imaging area on a detector surface of the flat-bed x-ray detector is selectable and moveable.2. The computer tomograph according to claim 1 , wherein the cathodes contain carbon nanotubes.3. The computer tomograph according to claim 1 , wherein the cathodes contain nanorods for emitting electrons claim 1 , which contain a substance selected from a group of substances consisting of metal oxides claim 1 , metal sulfides claim 1 , nitrides claim 1 , carbides and silicon.4. The computer tomograph according to claim 1 , wherein the MBFEX tube has a grid device arranged in a ...

METHOD FOR MANUFACTURING CRISS-CROSS TYPE X-RAY GRID

A method for manufacturing a criss-cross type X-ray grid may include: forming a plurality of criss-cross type grooves at predetermined intervals in a longitudinal direction and a lateral direction in a substrate made of an X-ray transparent material, through a semiconductor sawing machine, such that the grooves form a checker board shape as a whole; putting the substrate having the criss-cross type grooves formed therein into a storage tank filled with a molten X-ray absorbent material; filing the criss-cross type grooves, formed in the substrate, with the X-ray absorbent material by vacuuming the inside of the storage tank; and taking the substrate filled with the X-ray absorbent material out of the storage tank, and curing the substrate at room temperature. 1. A method for manufacturing a criss-cross type X-ray grid , comprising:forming a plurality of criss-cross type grooves at predetermined intervals in a longitudinal direction and a lateral direction in a substrate made of an X-ray transparent material, through a semiconductor sawing machine, such that the grooves form a checker board shape as a whole;putting the substrate having the criss-cross type grooves formed therein into a storage tank filled with a molten X-ray absorbent material;filing the criss-cross type grooves, formed in the substrate, with the X-ray absorbent material by vacuuming the inside of the storage tank; andtaking the substrate filled with the X-ray absorbent material out of the storage tank, and curing the substrate at room temperature.2. The method of claim 1 , wherein the criss-cross type grooves formed in the substrate are inclined at a predetermined angle toward the center from the center to the left and right ends of the substrate.3. The method of claim 1 , wherein the substrate is made of any one selected from the group consisting of plastic claim 1 , polymer claim 1 , aluminum claim 1 , ceramic claim 1 , graphite and carbon fiber.4. The method of claim 1 , wherein the X-ray ...

SYSTEM AND METHOD OF LOW DOSE CT FLUOROSCOPY VIA APERTURE CONTROL

An X-ray filter can include a curved structure for positioning around a computed tomography (CT) bore of a CT scanner. The curved structure can be formed of a metal capable of blocking X-rays emitted by an X-ray source of the CT scanner. The curved structure can include two or more apertures. Each aperture of the two or more apertures can allow X-rays emitted by the X-ray source to enter the CT bore when the X-ray source is aligned with the aperture. The X-ray filter can include an opening, arranged opposite to the two or more apertures across the CT bore, for exposing an X-ray detector of the CT scanner to X-rays emitted by the X-ray source and entering the CT bore through at least one of the two or more apertures. The CT scanner can include the X-ray filter. 1. An X-ray filter , comprising: 'two or more apertures, each aperture of the two or more apertures allowing X-rays emitted by the X-ray source to enter the CT bore when the X-ray source is aligned with the aperture; and', 'a curved structure for positioning around a computed tomography (CT) bore of a CT scanner, the curved structure formed of a metal capable of blocking X-rays emitted by an X-ray source of the CT scanner, and includingan opening, arranged opposite to the two or more apertures across the CT bore, for exposing an X-ray detector of the CT scanner to X-rays emitted by the X-ray source and entering the CT bore through at least one of the two or more apertures.2. The X-ray filter of claim 1 , wherein the metal capable of blocking X-rays emitted by the X-ray source of the CT scanner includes lead.3. The X-ray filter of claim 1 , wherein a breadth of each aperture of the two or more apertures is smaller than a breadth of the opening.4. The X-ray filter of claim 1 , wherein a breadth of each aperture of the two or more apertures is such that the X-rays entering the CT bore through the aperture excite only a portion of the CT detector.5. The X-ray filter of claim 1 , further comprising:one or more ...

X-RAY CT SYSTEM AND MEDICAL PROCESSING APPARATUS

An X-ray CT system according to an embodiment includes processing circuitry configured to: execute first scanning of acquiring a first subject data set corresponding to first X-ray energy by irradiating a first region of a subject with X-rays; execute, after the first scanning, second scanning of acquiring a second subject data set corresponding to second X-ray energy and a third subject data set corresponding to third X-ray energy different from the second X-ray energy by irradiating a second region included in the first region with X-rays; and perform material decomposition among a plurality of reference materials based on: a fourth subject data set obtained based on the first subject data set and one of the second subject data set and the third subject data set; and the other of the second subject data set and the third subject data set. 1. An X-ray CT system comprising processing circuitry configured to:execute first scanning of acquiring a first subject data set corresponding to first X-ray energy by irradiating a first region of a subject with X-rays;execute, after the first scanning, second scanning of acquiring a second subject data set corresponding to second X-ray energy and a third subject data set corresponding to third X-ray energy different from the second X-ray energy by irradiating a second region included in the first region with X-rays; andperform material decomposition among a plurality of reference materials based on: a fourth subject data set obtained based on the first subject data set and one of the second subject data set and the third subject data set; and the other of the second subject data set and the third subject data set.2. The X-ray CT system according to claim 1 , wherein the processing circuitryacquires a first projection data set as the first subject data set through execution of the first scanning by irradiating the first region extending in a body axis direction of the subject with X-rays,acquires a second projection data set as ...

RADIOLOGICAL IMAGING DEVICE WITH ADVANCED SENSORS

A method and device for acquiring a radiological image of at least part of a patient placed in a gantry. The method includes causing a source to emit radiation that passes through the at least part of the patient and receiving the radiation at a detector. In one embodiment the detector may include at least one first linear sensor having a first sensitive surface and a second linear sensor having a second sensitive surface, wherein the sensitive surfaces are partially overlapped along the direction of movement. The method also includes generating the radiological image at a control unit by generating a first image acquired by the first linear sensor and a second image acquired by the second linear sensor. The control unit may overlap the first and second images in a region where the first and second linear sensors overlap. 1. A method of acquiring a radiological image of at least part of a patient placed in a gantry , the method comprising:causing a source to emit radiation that passes through the at least part of the patient, the radiation defining a central axis of propagation;receiving the radiation at a detector, and the detector includes at least one first linear sensor having a first sensitive surface and a second linear sensor having a second sensitive surface, wherein the sensitive surfaces are partially overlapped along the direction of movement;outputting data signals from the detector to a control unit;generating the radiological image, at the control unit, by generating a first image acquired by the first linear sensor and a second image acquired by the second linear sensor, and overlapping the first and second images in a region where the first and second linear sensors overlap.2. The method of claim 1 , further comprising continuously translating the source and the detector in a direction of movement substantially perpendicular to the central axis of propagation using a translation mechanism that is connected to the source and the detector.3. The method ...

Cbct comprising a beam shaping filter

In a first aspect, the present invention relates to a beam shaping filter ( 1 ) for use in a cone beam computed tomography system. The filter comprises a radiation attenuating element for positioning between an x-ray source of the cone beam computed tomography system and an object to be imaged. The radiation attenuation as function of position in at least a part ( 2 ) of the radiation attenuating element is rotationally symmetric with respect to a point of rotational symmetry ( 3 ).

CONTINUOUS ION BEAM KINETIC ENERGY DISSIPATER APPARATUS AND METHOD OF USE THEREOF

The invention comprises a method and apparatus for slowing positively charged particles, comprising the steps of: (1) transporting the positively charged particles from an accelerator, along a beam transport line, and into a nozzle system; (2) placing a first liquid in a first chamber in a beam path of the positively charged particles; (3) placing a second liquid in a second chamber in the beam path of the positively charged particles; (4) moving the first and second chamber with the nozzle system; (5) slowing the positively charged particles using the first liquid and the second liquid; (6) moving the first chamber in a first direction to yield a longer first pathlength of the positively charged particles through the first chamber; and (7) moving the second chamber opposite the first direction to yield a longer second pathlength of the positively charged particles through the second chamber. 1. An apparatus for reducing positively charged particles , comprising:an accelerator configured to deliver the positively charged particles along a beam transport line into a nozzle system, said nozzle system comprising:a first chamber configured to hold a first liquid in a beam path of the positively charged particles;a second chamber configured to hold a second liquid in the beam path of the positively charged particles; anda computer controlled motor configured to move said first chamber and said second chamber with said nozzle system,wherein the first liquid and the second liquid reduce the kinetic energy of the positively charged particles during use.2. The apparatus of claim 1 , further comprising:a first beam path, comprising a first pathlength, from a beam entrance side of said first chamber to a beam exit side of said first chamber; anda second beam path, comprising a second pathlength, from an incident side of said second chamber to an egress side of said second chamber.3. The apparatus of claim 2 , further comprising:a common fluid reserve tank connected with a ...

X-ray imaging apparatus

In an X-ray imaging apparatus an image processor is configured to generate a phase contrast image based on a plurality of first images acquired by a first detection region (R1) at a plurality of relative positions of the first detection region with respect to a subject (T) to be imaged, and to generate an absorption image based on a plurality of second images acquired by a second detection region (R2) at a plurality of relative positions of the second detection region with respect to the subject.

X-ray ct apparatus

An X-ray CT apparatus according to an embodiment includes setting circuitry. The setting circuitry is configured to set a third plan for a patient, by integrating together a first plan for the patient and a second plan for the patient.

SWITCHABLE PHASE STEPPING

Phase stepping for differential phase contrast and/or dark field x-ray imaging using a switchable grating in which particles in a reservoir are aligned into wall-like x-ray absorbing structures by inducing a standing wave in a medium in the reservoir. The standing wave is modified by a second ultrasound generator that modifies the standing wave such that the pressure nodes of the first standing wave shift position. 1. A phase stepping device for differential phase contrast and/or dark field x-ray imaging , comprising: a reservoir containing a substantially x-ray transparent medium comprising particles that substantially attenuate x-ray radiation;', 'a first ultrasound generator, arranged at and acoustically connected to a first side of the reservoir, configured to generate a first soundwave such that a first standing wave is formed within the medium causing the x-ray absorbing particles to organize along pressure nodes of the standing wave; and', 'a second ultrasound generator arranged at and acoustically connected to the reservoir configured to generate a second soundwave such that a second standing wave is formed within the medium causing the x-ray absorbing particles to organize along pressure nodes of the standing wave,, 'a switchable grating comprisingwherein the switchable grating is configured to shift a position of the pressure nodes between at least two positions by generating the first standing wave by the first ultrasound generator and the second standing wave by the second ultrasound generator in a predetermined sequence.2. The phase stepping device according to claim 1 , wherein the predetermined sequence is a sequence in which the first ultrasound generator and the second ultrasound generator are switched on and off alternatingly such that only one is switched on at the time or a sequence claim 1 , wherein the first ultrasound generator is switched on while the second ultrasound generator is alternatingly switched on and off.3. The phase stepping ...

Photon-Counting CT Apparatus

The present invention is directed to make a photon-counting CT apparatus capable of more accurate data acquisition. Such apparatus is provided with a reference detection unit and a time measuring instrument to measure temporal fluctuations in a rotational direction of an X-ray irradiation unit. The apparatus corrects temporal fluctuations in the rotational direction involved in data measured by the reference detection unit, using time measurement data which is output by the time measuring instrument. Using corrected measurement data measured by the reference detection unit, the apparatus makes corrections of fluctuations pertaining to the X-ray tube of the X-ray irradiation unit and pile-up. Data corrections with high accuracy are thus enabled. 1. A photon-counting CT apparatus comprising:an X-ray irradiation unit which delivers X-rays;a photon counting scheme based X-ray detection unit which detects the X-rays;a data acquisition unit which counts X-ray photons detected by the X-ray detection unit for each of energy ranges which are predetermined divisions of energy, thus acquiring measurement information for each of the energy ranges;a reference detection unit which measures fluctuations in X-rays delivered from the X-ray irradiation unit; anda time measuring unit which measures temporal fluctuations in a rotational direction of the X-ray irradiation unit.2. The photon-counting CT apparatus according to further comprising:a correction unit which corrects measurement data measured by the reference detection unit, based on time measurement data measured by the time measuring unit.3. The photon-counting CT apparatus according to claim 2 ,wherein the correction unit corrects the measurement information measured by the data acquisition unit, based on the time measurement data.4. The photon-counting CT apparatus according to claim 2 ,wherein the correction unit converts measurement data acquired through the reference detection unit to dose rate data using the time ...

X-ray ct apparatus

An X-ray CT apparatus according to an embodiment includes a photon counting detector and processing circuitry. The photon counting detector includes a plurality of detection areas arranged in a channel direction and a column direction and is configured to output detection signals corresponding to the quantity of photons incident thereto, the detection areas each including a plurality of detecting elements. The processing circuitry is configured to calculate a heat generation amount for each of the detection areas on the basis of the detection signal corresponding to the incident photons detected in the detection area, to determine a control amount on the basis of the heat generation amount calculated for each of the detection areas, and to control temperature in each of the detection areas by using the determined control amount.

Systems and methods for reducing a radial distance of a collimator assembly occupying

A device may include a collimator positioned between a radiation source of a scanner and a bore of the scanner. The bore may include a detecting region configured to accommodate a subject. The collimator may be configured to prevent at least one portion of radiation rays emitted from the radiation source from being incident on the subject. The device may further include a first filter and a second filter. The first filter may be positioned between the radiation source and the collimator. The second filter may be positioned between the collimator and the bore. The first filter and the second filter may be configured to adjust a distribution of radiation impinging upon the subject.

X-ray phase imaging apparatus and method of detecting defect of material containing fibers

This X-ray phase imaging apparatus is provided with a control unit that acquires information on a defect of a material based on a dark field image of the material.

X-RAY IMAGING DEVICE AND X-RAY IMAGE FORMING METHOD

An X-ray imaging apparatus includes an X-ray generator configured to generate X-rays and radiate the X-rays to an object; an X-ray detector configured to detect the X-rays that have passed through the object and convert the detected X-rays into a signal; and a controller configured to generate a single energy X-ray image and a plurality of multiple energy X-ray images using the signal and control a display to display the generated single energy X-ray image and the plurality of multiple energy X-ray images together. 1. An X-ray imaging apparatus comprising:an X-ray generator configured to generate X-rays and radiate the X-rays to an object;an X-ray detector configured to detect the X-rays that have passed through the object and convert the detected X-rays into a signal; anda controller configured to generate a single energy X-ray image and a plurality of multiple energy X-ray images using the signal and control a display to display the generated single energy X-ray image and the plurality of multiple energy X-ray images together.2. The X-ray imaging apparatus according to claim 1 , wherein the controller is configured to analyze the signal and determine a characteristic of the object.3. The X-ray imaging apparatus according to claim 2 , wherein the controller is configured to generate the plurality of multiple energy X-ray images based on the characteristic of the object.4. The X-ray imaging apparatus according to claim 2 , wherein the controller is configured to control the display to display an image corresponding to the determined characteristic claim 2 , among the single energy X-ray image and at least one of the plurality of multiple energy X-ray images claim 2 , on a larger scale.5. The X-ray imaging apparatus according to claim 2 , wherein the characteristic comprises at least one among a structure of internal tissues of the object claim 2 , a ratio of respective internal tissues claim 2 , and a density of a specific internal tissue.6. The X-ray imaging ...

X-RAY BEAM TRANSMISSION PROFILE SHAPER

An imaging system () includes a radiation source () that emits radiation from a focal spot () in a direction of an examination region. The imaging system further includes a beam shaper (), located between the focal spot and the examination region, that shapes an x-ray transmission profile of the radiation emitted from the source and incident on the beam shaper such that the radiation leaving the beam shaper has a pre-determined transmission profile. 1. An imaging system , comprising:a radiation source that emits radiation from a focal spot in a direction of an examination region; anda beam shaper, located between the focal spot and the examination region, that shapes an x-ray transmission profile of the radiation emitted from the source and incident on the beam shaper such that the radiation leaving the beam shaper has a pre-determined transmission profile.2. The imaging system of claim 1 , wherein the beam shaper has a central region claim 1 , and the beam shaper claim 1 , comprising:a two dimensional array of individual radiation attenuating elements which are separated from each other and arranged such that a density of the attenuating elements varies from the central region in a direction away from the central region along an x-axis direction, wherein the individual radiation attenuating elements fully or substantially fully attenuate x-rays.3. The imaging system of claim 2 , wherein the attenuating elements are arranged such that a density of the attenuating elements varies radially from the central region in a direction away from the central region in an x-y plane.4. The imaging system of claim 2 , wherein the attenuating elements are focused at the focal spot.5. The imaging system of claim 4 , wherein the attenuating elements attenuate off-focal rays.6. The imaging system of claim 2 , wherein a pattern of the attenuating elements in the beam shaper is deterministic.7. The imaging system of claim 2 , wherein a pattern of the attenuating elements in the beam ...

SYSTEM FOR NON-INVASIVE CLASSIFICATION OF DIFFERENT TYPES OF MICRO-CALCIFICATIONS IN HUMAN TISSUE

A non-invasive method distinguishes between two types of micro-calcification by x-ray imaging in mammography. Two major types of micro-calcifications are found and confirmed by histopathology and they are correlated to benign and malignant breast lesions. Distinguishing between them non-invasively will significantly improve early breast cancer diagnosis. This is based on the fact that these two types of micro-calcifications show opposite absorption and small-angle scattering signals in x-ray imaging. The imaging system, which can record these two signals of the breast tissue simultaneously for instance, an x-ray grating interferometer, can be used to uniquely determine the micro-calcification type. This is expected to be used in mammography to improve early breast cancer diagnosis, increase diagnosis accuracy and decrease the biopsy rate. 19-. (canceled)10. A system for a non-invasive classification of different types of micro-calcifications in human tissue by combining an absorption signal and a small-angle scattering signal , the system comprising:a set-up for recording the absorption signal and the small-angle scattering signal; andsignal processing means being enabled to analyze at least one pair of micro-calcifications, an analysis being based on a finding that the different types of micro-calcifications have opposite absorption and small angle scattering signals, that is, one type gives a weaker absorption signal but a stronger small-angle scattering signal than the other type or vice-versa.11. The system according to claim 10 ,{'sub': 1', '2', '1', '2', '1', '2, 'wherein a signal pair (t,t) is assigned to a pair of micro-calcifications, where t,t⊂{+,−} and tand trepresent a relative signal strength of the absorption signal and the small angle scattering signal, respectively, wherein “+” means a signal is stronger, “−” means the signals is weaker; and'}further comprising an evaluator module disposed in said signal processing means for identifying if two signal ...

IMAGING-BASED SELF-ADJUSTING RADIATION THERAPY SYSTEMS, DEVICES, AND METHODS

Systems, devices, and methods are presented for automatic tuning, calibration, and verification of radiation therapy systems comprising control elements configured to control parameters of the radiation therapy systems based on images obtained using electronic portal imaging devices (EPIDs) included in the radiation therapy system. 158-. (canceled)59. A method for calibrating a radiation treatment device , the radiation treatment device including control elements configured to control parameters of the radiation treatment device , the method comprising:(i) acquiring, using an imaging device, one or more images representing beam fields produced by a beam source;(ii) determining a parameter of the radiation treatment device from the one or more images, the parameter relating to an output of a control element;(iii) evaluating the parameter against a predefined standard;(iv) adjusting the output of the control element based on the result of the evaluating until the parameter meets the predefined standard; and(v) repeating steps (i) through (iv) until the parameters are evaluated and the outputs of the control elements are adjusted,wherein one of the parameters is the imaging device position with respect to a coordinate frame of the radiation treatment device.60. The method of claim 59 , wherein the determining the imaging device position includes determining a location of the projection of the beam center on the imaging device claim 59 , and determining a distance of the imaging device from the beam source.61. The method of claim 60 , wherein the determining the distance from the beam source includes acquiring a first and a second image in (i) with the imaging device positioned at two different locations from the beam source claim 60 , and calculating the distance between the imaging device and the beam source based on an amount by which the imaging device moved between the two locations and the beam field sizes at the first and second locations of the imaging device.63 ...

PHOTON COUNTING APPARATUS

According to an embodiment, The X-ray tube generates X-rays. The X-ray detector detects the X-rays transmitted through a subject. The data acquisition circuitry acquires count data concerning a count number of the detected X-rays for energy bands. The memory circuitry stores data of a response function that associates incident X-rays on the X-ray detector with a response characteristic of a system including the X-ray detector and the data acquisition circuitry. The processing circuitry calculates an X-ray absorption amount of each of a plurality of base substances based on the count data concerning the energy bands acquired by the data acquisition circuitry, an energy spectrum of the incident X-rays, and the response function. 1. A photon counting apparatus , comprising:an X-ray to be configured to generate X-rays;an X-ray detector configured to detect the X-rays generated by the X-ray tube and transmitted through a subject;data acquisition circuitry configured to acquire count data concerning a count number of the detected X-rays for at least 16 energy bands, based on an output signal from the X-ray detector;memory circuitry configured to store data of a response function that associates an energy of incident X-rays on the X-ray detector with a response characteristic of a system including both of the X-ray detector and the data acquisition circuitry; andprocessing circuitry configured to calculate an X-ray absorption amount of each of a plurality of base substances based on the count data concerning the at least 16 energy bands acquired by the data acquisition circuitry, an energy spectrum of the incident X-rays generated by the X-ray tube, and the data of the response function stored in the memory circuitry.2. An image generating apparatus , comprising:memory circuitry configured to store data of a response function that associates energy of incident X-rays on an X-ray detector with a response characteristic of a system including both of the X-ray detector and ...

Monochromatic x-ray systems and methods

According to some aspects, a carrier configured for use with a broadband x-ray source comprising an electron source and a primary target arranged to receive electrons from the electron source to produce broadband x-ray radiation in response to electrons impinging on the primary target is provided. The carrier comprising a housing configured to be removeably coupled to the broadband x-ray source and configured to accommodate a secondary target capable of producing monochromatic x-ray radiation in response to incident broadband x-ray radiation, the housing comprising a transmissive portion configured to allow broadband x-ray radiation to be transmitted to the secondary target when present, and a blocking portion configured to absorb broadband x-ray radiation.

METHOD AND DEVICE FOR SETTING A SPATIAL INTENSITY DISTRIBUTION OF AN X-RAY BEAM

In a method and device for setting a spatial intensity distribution of an X-ray beam, an X-ray beam is generated by an X-ray tube. A beam path of the X-ray beam is guided in a direction of propagation by a form filter including a plurality of lamella plates which taper to a focal point such that, for each of the lamella plates, at least one straight line running through the respective lamella plate and forming a first direction of the lamella plate is aligned with the focal point. The first directions of the lamella plates of the form filter are aligned relative to the beam path. As a result of the alignment, parts of the X-ray beam are absorbed. Finally, the spatial intensity distribution of the X-ray beam is set in the direction of propagation by the absorption due to the lamella plates. 1. A method for setting a spatial intensity distribution of an X-ray beam , comprising:generating an X-ray beam via an X-ray tube;guiding a beam path of the X-ray beam in a direction of propagation by a form filter including a plurality of lamella plates which taper to a focal point such that, for each respective lamella plate of the plurality of lamella plates, at least one straight line running through each respective lamella plate and forming a first direction of the lamella plate is aligned with the focal point;aligning the first directions of the plurality of lamella plates of the form filter relative to the beam path, parts of the X-ray beam being absorbed as a result of the aligning of the first directions by the lamella plates; andsetting the spatial intensity distribution of the X-ray beam in a direction of propagation established by the absorption of the parts of the X-ray beam due to the aligning of the first directions by the lamella plates.2. The method of claim 1 , further comprising:generating at least some of the X-ray radiation at a generation point in the X-ray tube, wherein the spatial intensity distribution is set with the first directions of the plurality of ...

MULTI-DIRECTIONAL PHASE CONTRAST X-RAY IMAGING

The present invention relates to phase contrast X-ray imaging of an object. In order to provide phase contrast information in more than one direction, an X-ray imaging system is provided that comprises an X-ray source (), an X-ray detector arrangement (), and a grating arrangement () with a phase-grating structure () and an analyser-grating structure (). The X-ray detector arrangement comprises at least eight line-detector units () parallel to each other in a first direction (), the line-detector units extending linearly in a direction () perpendicular to the first direction. The X-ray source, the X-ray detector arrangement and the grating arrangement are adapted to perform an acquisition movement in relation to an object in a scanning direction parallel to the first direction. The phase-grating structure has a number of linear phase-gratings, each of which is arranged in fixed association with an assigned line of the at least eight line-detector units; a first part as first phase-gratings with slits in the first direction, and a second part as second phase-gratings with slits in a second direction different to the first direction. The analyser-grating structure has a number of linear analyser-gratings, each of which is arranged in fixed association with an assigned line of the at least eight line-detector units; a first part as first analyser-gratings with slits in the first direction, and a second part as second analyser-gratings with slits in the second direction. At least four adjacent lines of the line-detector units are associated with the first phase-gratings and the first analyser-gratings and at least four adjacent lines of the line-detector units are associated with the second phase-gratings and the second analyser-gratings. The grating arrangement may comprise a source-grating structure arranged between the X-ray source and the phase-grating structure, to provide sufficient coherence to the X-ray beam passing the source-grating structure, so that after ...

Photon counting x-ray ct apparatus

A photon counting X-ray CT apparatus according to an embodiment includes: data acquiring circuitry, and processing circuitry. The data acquiring circuitry is configured to allocate energy measured by signals output from a photon counting detector in response to incidence of X-ray photons to any of a plurality of first energy bins so as to acquire a first data group as count data of each of the first energy bins. The processing circuitry is configured to determine a plurality of second energy bins obtained by grouping the first energy bins in accordance with a decomposition target material that is a material to be decomposed in a imaging region, allocate the first data group to any of the second energy bins so as to generate a second data group, and use the second data group to generate an image representing a distribution of the decomposition target material.

MATERIAL DIFFERENTIATION WITH PHASE CONTRAST IMAGING

A method and system to determine material composition of an object comprises capturing a series of digital radiographic images of the object using a single exposure energy level. An intensity of the captured images is determined as well as phase shift differences. A difference in material composition of the object may be determined based on a combination of the determined intensity and the modulated phase shifts of the captured images. 116-. (canceled)17. A method of determining material composition of an object , the method comprising:capturing a series of digital radiographic images of the object using an x-ray beam;determining a phase shift magnitude that occurred in the object using the captured radiographic images of the object;generating a differential phase shift image of the object;generating an integrated phase image of the object; andgenerating and displaying a radiographic image of the object including separately displaying within the radiographic image of the object a first material composition and a second material composition inside the object based on a combination of the differential phase shift image and the integrated phase image.18. The method of claim 17 , wherein the step of generating and displaying a radiographic image of the object includes separately displaying within the radiographic image of the object two different soft materials inside the object.19. The method of claim 18 , wherein the step of generating and displaying a radiographic image of the object includes separately displaying within the radiographic image of the object glandular and adipose tissue inside the object.20. The method of claim 17 , wherein the step of capturing comprises using a digital detector claim 17 , the digital detector comprising a plurality of pixels claim 17 , and wherein the step of determining the phase shift magnitude is performed for each pixel.21. The method of claim 20 , further comprising determining an intensity of the captured radiographic images ...

METHOD AND APPARATUS FOR FABRICATION AND TUNING OF GRATING-BASED DIFFERENTIAL PHASE CONTRAST IMAGING SYSTEM

A method for assembling a phase contrast x-ray imaging system includes fabricating a phase grating and an absorption grating according to a preselected pitch of the gratings. The actual obtained pitches are measured and a source grating is then fabricated according to a desired design point of the imaging system. 1. A method comprising:fabricating a phase grating and an absorption grating according to a preselected pitch;measuring an actual pitch of the fabricated phase grating and absorption grating; andfabricating a source grating based on the actual pitch of the fabricated phase grating and absorption grating.2. The method of claim 1 , further comprising disposing the fabricated source grating claim 1 , phase grating and absorption grating in a phase contrast imaging system claim 1 , wherein the phase grating and absorption grating are each disposed in one of a pair of parallel planes.3. The method of claim 2 , further comprising tilting one of the fabricated phase grating and absorption grating with respect to the other at a preselected tilt angle.4. The method of claim 3 , further comprising maintaining the phase grating and absorption grating in each of the parallel planes after the step of tilting.5. The method of claim 2 , further comprising placing an object to be imaged in the phase contrast imaging system and capturing a radiographic image of the object.6. The method of claim 3 , further comprising placing an object to be imaged in the phase contrast imaging system and capturing a radiographic image of the object.7. The method of claim 2 , wherein the step of fabricating the source grating includes selecting a dimension of the source grating according to P=p(p+p)/(2p) claim 2 , wherein p claim 2 , p claim 2 , and pare the selected dimensions of the source claim 2 , phase claim 2 , and absorption grating claim 2 , and wherein pis the period of the Moire pattern.8. A method of assembling a phase contrast imaging system claim 2 , the method comprising: ...

X-ray Tomographic Inspection System for the Identification of Specific Target Items

The present invention provides for an improved scanning process with a stationary X-ray source arranged to generate X-rays from a plurality of X-ray source positions around a scanning region, a first set of detectors arranged to detect X-rays transmitted through the scanning region, and at least one processor arranged to process outputs from the first set of detectors to generate tomographic image data. The X-ray screening system is used in combination with other screening technologies, such as NQR-based screening, X-ray diffraction based screening, X-ray back-scatter based screening, or Trace Detection based screening. 1. A method for identifying objects in a container , comprising:performing a first stage screening, comprising: arranging a stationary X-ray source to generate X-rays from a plurality of X-ray source positions around a scanning region, arranging a first set of detectors to detect X-rays transmitted through the scanning region, and arranging a second set of detectors to detect X-rays scattered within the scanning region;processing data output from the first set of detectors using at least one processor to generate at least one tomographic image;processing data output from the second set of detectors to generate scatter image data; and,performing a second stage screening comprising at least one of a NQR-based screening process, X-ray diffraction based screening process, X-ray backscatter based screening process, or trace detection based screening process.2. The method of wherein the at least one processor outputs data indicative of a suspect object in the container.3. The method of wherein the at least one processor outputs a signal indicating said container should be subject to the second stage screening only if the first stage screening identifies a suspect object in the container.4. The method of wherein the at least one processor outputs a signal indicating said container should not be subject to the second stage screening only if the first stage ...

IMAGE-GUIDED RADIATION TREATMENT WITH IMAGING DATA USING IMAGING RADIATION AT DIFFERENT ENERGY LEVELS

A method of image-guided radiation treatment is described. The method includes processing a first and second sets of image data to generate an enhanced image, wherein the enhanced image comprises a combination of the first and second sets of image data, wherein part or all of the image data comprises a target of a patient. The method also includes registering the enhanced image with another image to obtain a registration result and tracking the target using the registration result to generate tracking information. The method also includes directing treatment delivery to the target based on the tracking information obtained from the enhanced image. 1. A method of image-guided radiation , the method comprising:processing a first and second sets of image data to generate an enhanced image, wherein the enhanced image comprises a combination of the first and second sets of image data, wherein part or all of the image data comprises a target of a patient;registering the enhanced image with another image to obtain a registration result;tracking the target using the registration result to generate tracking information; anddirecting treatment delivery to the target based on the tracking information obtained from the enhanced image.2. The method of claim 1 , wherein the another image comprises a pre-treatment image.3. The method of claim 1 , wherein the first and second sets of image data comprises at least part of the target.4. The method of further comprising generating the first set of image data of part or all of the target using imaging radiation at the first energy level and the second set of image data of part or all of the target using imaging radiation at the second energy level.5. The method of claim 1 , wherein the another image comprises a computed tomography (CT) image.6. The method of claim 1 , wherein directing treatment delivery comprises:generating a treatment delivery beam using a treatment delivery system comprising a radiation source; anddirecting the ...

COMPUTED TOMOGRAPHY RECORDING WITH DIFFERENT SETS OF ENERGY THRESHOLDS

A method is for recording a region of interest of an examination object with a computed tomography system including an energy-selective X-ray detector with a number of energy threshold values that can be set by way of an energy threshold values. In an embodiment, the method includes first recording of first projection scan data with a first set of energy thresholds; setting a second set of energy thresholds different from the first set of energy thresholds, based on a temporally variable parameter; and second recording of second projection scan data different from the first projection scan data with the second set of energy thresholds. 1. A method for recording a region of interest of an examination object with a computed tomography system , including an energy-selective X-ray detector including a number of energy threshold values settable via a set of energy thresholds , the method comprising:recording first projection scan data with a first set of energy thresholds;setting a second set of energy thresholds, different from the first set of energy thresholds, based on a temporally variable parameter; andrecording second projection scan data, different from the first projection scan data, with the second set of energy thresholds.2. The method of claim 1 , further comprising:presetting the first set of energy thresholds based on the temporally variable parameter.3. The method of claim 1 , further comprising:determining the second set of energy thresholds based on at least one of the first projection scan data and the temporally variable parameter.4. The method of claim 1 , wherein the temporally variable parameter is an object parameter claim 1 , a scanning parameter claim 1 , a detector parameter or an X-ray source parameter.5. The method of claim 4 , wherein the object parameter includes an attenuation property claim 4 , a geometry property or an anatomical property of the examination object.6. The method of claim 4 , wherein the scanning parameter includes a ...

X-ray computed tomography apparatus

According to one embodiment, an X-ray computed tomography apparatus includes an X-ray detection element, an A/D convertor, a readout switch, and readout control circuitry. The X-ray detection element outputs an electric signal corresponding to a detected X-ray. The A/D convertor A/D-converts the electric signal. The readout switch switches a connection between the X-ray detection element and the A/D convertor. The readout control circuitry acquires, as offset data, data which is output by the A/D convertor in a state where the readout switch is OFF instead of projection data which is output by the A/D convertor according to the electric signal in a state where the readout switch is ON, in a view during a scan.

RADIATION DETECTOR AND RADIATION DETECTOR MODULE

A radiation detector according to an embodiment includes a plurality of radiation detector modules and a fixing frame. When a radiation detector module is attached to the fixing frame, a guiding part with a groove shape formed at an end of a support member of the radiation detector module on a side of the fixing frame is fitted to a guiding pin provided to an end of the fixing frame, so that the radiation detector module is positioned in a radiation irradiation direction while a movement thereof in a channel direction and a row direction is restricted. 1. A radiation detector comprising:a plurality of radiation detector modules each including a detection surface where a plurality of detecting elements configured to detect radiation are arranged in a channel direction and a row direction, and a support member configured to support the detecting elements; anda fixing frame configured to fix positions of the radiation detector modules so that the radiation detector modules are arranged in the channel direction and attached and the detection surfaces of the radiation detector modules are arranged in the channel direction, whereina guiding pin is provided at an end of the fixing frame in the row direction, the guiding pin extending in a radiation irradiation direction,a guiding part with a groove shape is formed at an end of the support member on a side of the fixing frame in the row direction, the guiding part extending in the radiation irradiation direction, andwhen the radiation detector module is attached to the fixing frame, the guiding part is fitted to the guiding pin so that the radiation detector module is positioned in the radiation irradiation direction while a movement thereof in the channel direction and the row direction is restricted.2. The radiation detector according to claim 1 , whereina guidance groove is formed at each side surface of the support member in the channel direction, the guidance groove extending in the row direction, andwhen the radiation ...

APPARATUS FOR AN X-RAY DEVICE

With a screen-filter-mirror unit installed in a sandwich architecture, an x-ray window on a patient or an object can also be visualized during an x-ray recording with a light window. It is advantageous that a screen, a filter and a light window unit are combined in just one unit and with a changing x-ray window only the unit is replaced and/or the attack angle of the unit and the alignment of a light source directed hereto can be attuned to one another. 1. An apparatus , comprising:a filter unit for homogenizing x-ray beams output by an x-ray source;an alignable screen-filter-mirror unit for localizing an x-ray window and having a base plate with at least one cutout formed therein, said filter unit disposed in said at least one cutout; andsaid filter unit having a filter layer with a light-reflecting layer and/or light-reflecting surface, said light-reflecting layer and/or light-reflecting surface of said filter unit is formed on a side of said base plate facing a light source.2. The apparatus according to claim 1 , wherein said filter unit is embodied in a form of a film or a plate.3. The apparatus according to claim 1 , wherein said filter unit is disposed in and/or on and/or under said at least one cutout of said base plate.4. The apparatus according to claim 1 , wherein said alignable screen-filter-mirror unit is designed in a sandwich architecture.5. The apparatus according to claim 1 , wherein light beams of the light source can be deflected according to a propagation of an x-ray beam of the x-ray source using said at least one light-reflecting layer and/or light-reflecting surface of said filter unit.6. The apparatus according to claim 1 , further comprising a collimator claim 1 , said alignable screen-filter-mirror unit can be positioned and aligned in said collimator such that the light source directed at said light-reflecting layer and/or light-reflecting surface of said alignable screen-filter-mirror unit deflects light beams originating herefrom on said ...

METHODS AND SYSTEMS FOR INTEGRATED FILTER SYSTEM

Various methods and systems are provided for an integrated filter assembly including a plurality of bowtie filters and a hardening filter mounted on a single carriage. In one embodiment, an imaging system may include a carriage including a hardening filter and one or more bowtie filters, and a filter driving system for moving the carriage to selectively position the hardening filter and one of the one or more bowtie filters in a path of a radiation beam between a radiation source and an imaging subject, the hardening filter at least partially overlapping with at least one of the one or more bowtie filters. In this way, a single carriage may include a plurality of filters which may be selectively positioned in a path of the radiation beam entering a subject without having to stack multiple carriages and switch carriages between scans. 1. An imaging system , comprising:a carriage including one or more hardening filters and one or more bowtie filters, and a filter driving system for moving the carriage to selectively position the one or more hardening filters and the one of the one or more bowtie filters in a path of a radiation beam between a radiation source and an imaging subject, the one or more hardening filters at least partially overlapping with at least one of the one or more bowtie filters.2. The system of claim 1 , wherein the one or more hardening filter only partially overlaps with each of the one or more bowtie filters.3. The system of claim 1 , wherein the one or more bowtie filters include a first bowtie filter and a second bowtie placed adjacent to each other within the carriage.4. The system of claim 3 , wherein the one or more filters are placed between the first bowtie filter and the second bowtie filter claim 3 , the one or more hardening filters partially overlapping with each of the first bowtie filter and the second bowtie filter.5. The system of claim 3 , wherein the first bowtie filter is housed within a first slot formed in a cavity of the ...

METHODS AND SYSTEMS FOR X-RAY TUBE CONDITIONING

Various methods and systems are provided for x-ray tube conditioning for a computed tomography imaging method. In one embodiment, a scout scan may be carried out prior to a diagnostic to warmup the x-ray tube to a desired temperature for the diagnostic scan. A scout scan parameter optimizing algorithm may be used to determine scout scan parameters based on a selected patient absorbed dose range and an amount of energy to be imparted to an x-ray tube during the scout scan preceding a diagnostic scan. By using a hardening filter in the path of the x-ray beam, radiation absorbed dose of the subject being scanned may be limited to the selected patient absorbed dose range. 1. A method for an imaging system , comprising:computing scan parameters for one or more scout scans based on a selected patient absorbed dose range and a total amount of energy to be imparted to a x-ray tube of a radiation source during the one or more scout scans preceding a diagnostic scan, the total amount of energy estimated based on a final temperature of the x-ray tube at an onset of the diagnostic scan; andperforming the one or more scout scans according to the computed scan parameters.2. The method of claim 1 , wherein the estimating the total amount of energy to be imparted is estimated further based on an initial temperature of the x-ray tube and a time duration between a completion of the one or more scout scans and the onset of the diagnostic scan.3. The method of claim 1 , wherein the scan parameters for each of the one or more scout scans include one or more of an x-ray tube voltage claim 1 , an x-ray tube current claim 1 , a cradle speed claim 1 , a beam aperture at isocenter claim 1 , a beam focal point size claim 1 , a scan field of view claim 1 , and one or more filters to be placed in a path of a x-ray beam.4. The method of claim 3 , wherein the computing of the scan parameters is further based on a number of scout scans to be carried out in series prior to the diagnostic scan.5. ...

METHOD AND APPARATUS FOR VARIABLE X-RAY FILTRATION

The present invention pertains to a system and method for adaptive X-ray filtration comprising a volume of X-ray attenuating material with a central less attenuating three-dimensional region. The volume of X-ray attenuating material can be positioned within 10 cm from an X-ray source and rotated around an internal axis of rotation. The volume of X-ray attenuating material can be symmetric around the internal axis while the central less attenuating region can be asymmetric around the internal axis. Rotating the volume by a predetermined angle around the internal axis can change the amount of attenuation of an X-ray beam through the filter. The volume can be rotated by the same predetermined angle as an imaging subject or X-ray source and detector are rotated during X-ray image acquisition. 1. An X-ray imaging system comprising:an X-ray source for generating an X-ray beam;an X-ray detector for detecting said X-ray beam;a gantry for rotating said X-ray source and said X-ray detector around an imaging subject;an X-ray filter having a rotatable filter element positioned between said X-ray source and said imaging subject configured to rotate around an internal axis during rotation of said X-ray source and X-ray detector wherein an amount of attenuation of said X-ray beam by said rotatable filter element is a function of angular orientation of said rotatable filter element around said internal axis; anda rotation controller for synching rotation of said rotatable filter element with rotation of said X-ray source.2. The X-ray imaging system of wherein said rotatable filter element comprises an outer region with a first attenuation coefficient and a central region with a second attenuation coefficient.3. The X-ray imaging system of wherein said central region is less attenuating.4. The X-ray imaging system of wherein a minor axis of said central region is between 50% and 75% of a major axis of said central region.5. The X-ray imaging system of wherein said rotation ...

RADIOGRAPHIC IMAGING APPARATUS AND METHOD

The present invention relates to a radiographic imaging apparatus and a corresponding radiographic imaging method. The proposed apparatus comprises an X-ray source and a photon counting X-ray detector. The X-ray source comprises a rotary X-ray anode having a number of radial slits and a target layer provided on a surface of said rotary X-ray anode in between said radial slits for emitting X-ray radiation when hit by said electron beam. The said photon counting X-ray detector comprises a persistent current sensing and correction unit for sensing a persistent output current in a blanking interval during which no X-ray radiation is emitted by said X-ray source and for using the sensed persistent output current to correct a detector signal in a subsequent measurement interval during which X-ray radiation is emitted by said X-ray source. 1. An imaging apparatus , comprising: a cathode configured to emit an electron beam;', a plurality of radial slits; and', 'a target layer disposed on a surface of the anode between the radial slits,', 'wherein the target layer is configured to emit X-ray radiation in response to receiving the electron beam; and, 'an anode, including, 'a drive unit configured to rotate the X-ray anode during scanning such that during a first time interval the electron beam passes through the plurality of radial slits and during a subsequent time interval the target layer receives the electron beam and emits the X-ray radiation; and, 'a radiation source, includinga radiation detector configured to generate a first electrical signal during the first time interval and detect the emitted X-ray radiation and generate a subsequent electrical signal indicative thereof during the subsequent time interval.2. The imaging apparatus of claim 1 , further comprising:first circuitry configured to generate a first detector signal indicative of a first number of photons of the received X-ray radiation during the first time interval from the first electrical signal.3. The ...

RADIATION PHASE DIFFERENCE IMAGING APPARATUS

Provided is a radiation phase difference imaging apparatus in which a separation distance between a phase grating and a radiation detector is optimized. The separation distance between the phase grating and a detection surface of an FPD is determined based on the magnitude of noise corruption in a self-image projected onto the detection surface. The magnitude of the effect of the noise is used as a basis for assessing the separation distance. It is determined whether a distance Zd is appropriate for imaging, based on the magnitude of noise corruption in the self-image in a self-image picture which is obtained when the distance Zd is the distance between the phase grating and the detection surface of the FPD. The separation distance can thus be optimized based on actual conditions of an actual X-ray source that emits a plurality of types of X-rays. 15-. (canceled)6. A radiation phase difference imaging apparatus comprising:a radiation source which radiates a plurality of radiations having different wavelengths;a phase grating in which absorbers extending in one direction and absorbing a radiation are arranged in a direction orthogonal to one direction;a detection unit which detects a self-image of the phase grating formed by a Talbot interference on a detection surface detecting a radiation;a self-image picture generation unit which generates a self-image picture capturing a self-image based on an output of the detection unit; anda fluoroscopic image generation unit which generates a fluoroscopic image obtained by imaging a phase difference inside a subject based on the self-image picture,wherein a distance between the phase grating and the detection surface of the detection unit is determined based on how much the self-image captured on the detection surface is disturbed by noise.7. The radiation phase difference imaging apparatus according to claim 6 , wherein the distance between the phase grating and the detection unit is determined by whether a noise influence ...

SINGLE STEP DIFFERENTIAL PHASE CONTRAST X-RAY IMAGING

A system and method for single step and motionless x-ray phase contrast imaging. In one embodiment, a system for single step x-ray imaging includes a clinical x-ray source, a first coded aperture mask, a second coded aperture mask, and a photon counting spectral detector. The first coded aperture mask is disposed between the x-ray source and an object to be imaged. The photon counting spectral detector is disposed to detect x-rays passing through the object. The second coded aperture mask is disposed between the object to be imaged and the photon counting spectral detector. The system can provide, from a single acquisition step, an absorption image, a phase image, and differential phase image. 1. A system for single step x-ray imaging , comprising:a clinical x-ray source;a first coded aperture mask disposed between the x-ray source and an object to be imaged;a photon counting spectral detector disposed to detect x-rays passing through the object; anda second coded aperture mask disposed between the object to be imaged and the photon counting spectral detector.2. The system of claim 1 , further comprising an image processing system configured to generate a differential phase contrast image of the object based on output of the photon counting spectral detector.3. The system of claim 2 , wherein the image processing system is configured to generate the differential phase contrast image based on output of the x-ray source generated in a single session.4. The system of claim 2 , wherein the imaging processor is configured to generate an absorption image claim 2 , a phase contrast image claim 2 , and a differential phase contrast image based on data acquired by the photon counting spectral detector during a single x-ray illumination of the object.5. The system of claim 2 , wherein the imaging processor is configured to provide an image based on spectrally dependent attenuation derived from data acquired by the photon counting spectral detector during a single x-ray ...

X-RAY COMPUTED TOMOGRAPHY APPARATUS

According to one embodiment, an X-ray computed tomography apparatus includes a gantry that performs X-ray CT imaging; a bed that movably supports a table top on which a subject lies; an optical emitter that is provided on the gantry and emits a light beam to the subject lying on the table top; and an estimator that estimates a shape index value of a cross section of the subject in an imaging range by utilizing the light beam emitted to the subject. 1. An X-ray computed tomography apparatus comprising:a gantry that performs X-ray CT imaging;a bed that movably supports a table top on which a subject lies;an optical emitter that emits a light beam to the subject lying on the table top; andprocessing circuitry that estimates a shape index value of a cross section of the subject in an imaging range by utilizing the light beam emitted to the subject.2. The X-ray computed tomography apparatus according to claim 1 , wherein:the optical emitter is a light projector that projects the light beam indicating a reference line of the imaging range of CT imaging on the subject placed on the table top; andthe processing circuitry estimates the shape index value based on a position of the light beam projected on the subject.3. The X-ray computed tomography apparatus according to claim 2 , wherein the processing circuitry estimates the shape index value of the cross section of the subject corresponding to the position of the light beam projected on the subject by applying the position of the light beam to a human body model resembling a three-dimensional shape of a human body.4. The X-ray computed tomography apparatus according to claim 3 , further comprising an optical camera that generates an optical image of the subject emitted by the light beam claim 3 ,wherein the processing circuitry specifies a first anatomical location in a light beam imaging region specified by the light beam, in a subject region relating to the subject included in the optical image, specifies a second ...

METHODS OF X-RAY IMAGING

Disclosed herein is a method comprising: directing X-ray in a first wavelength range and X-ray in a second wavelength range are directed to a subject; introducing a contrast agent into the subject; capturing a first image with the X-ray in the first wavelength range and a second image with the X-ray in the second wavelength range; determining a differential image between the first image and second image; wherein strength of interaction between the contrast agent and the X-ray in the first wavelength range and the strength of interaction between the contrast agent and the X-ray in the second wavelength range are different. 1. A method comprising:directing X-ray in a first wavelength range and X-ray in a second wavelength range to a subject;introducing a contrast agent into the subject;capturing a first image with the X-ray in the first wavelength range and a second image with the X-ray in the second wavelength range;determining a differential image between the first image and second image;wherein strength of interaction between the contrast agent and the X-ray in the first wavelength range and strength of interaction between the contrast agent and the X-ray in the second wavelength range are different.2. The method of claim 1 , wherein the first wavelength range and the second wavelength range do not overlap.3. The method of claim 1 , wherein the first wavelength range and the second wavelength range do not completely overlap.4. The method of claim 1 , further comprising generating the X-ray in the first wavelength range and X-ray in the second wavelength range from a same X-ray source.5. The method of claim 4 , wherein generating the X-ray in the first wavelength range and X-ray in the second wavelength range comprises filtering using different filters.6. The method of claim 1 , wherein the contrasting agent is introduced by ingestion or injection.7. The method of claim 1 , wherein the strengths of the interaction have a ratio of at least 1.2.8. The method of claim ...

X-RAY DIAGNOSTIC APPARATUS AND X-RAY DIAPHRAGM THEREOF

An X-ray diagnostic apparatus according to the present embodiment includes: an X-ray tube which generates X-rays to be irradiated at an object; an X-ray diaphragm which houses an X-ray shielding member forming an irradiation aperture, through which the X-rays pass, along a side surface of the X-ray tube; an X-ray detector which detects X-rays passing through the object; and an image data generation circuitry which generates image data based on the X-rays detected by the X-ray detector. 1. An X-ray diagnostic apparatus comprising:an X-ray tube configured to generate X-rays to be irradiated at an object;an X-ray diaphragm configured to house an X-ray shielding member forming an irradiation aperture, through which the X-rays pass, along a side surface of the X-ray tube;an X-ray detector configured to detect X-rays passing through the object; andan image data generation circuitry configured to generate image data based on X-rays detected by the X-ray detector.2. An X-ray diagnostic apparatus comprising;an X-ray tube configured to generate X-rays to be irradiated at an object;an X-ray diaphragm configured to fold and house an X-ray shielding member forming an irradiation aperture through which the X-rays pass;an X-ray detector configured to detect X-rays passing through the object; andan image data generation circuitry configured to generate image data based on X-rays detected by the X-ray detector.3. The X-ray diagnostic apparatus according to claim 1 , whereinthe irradiation aperture is formed by opening/closing the X-ray shielding member, andthe X-ray shielding member is formed of a diaphragm blade member which is divided along a direction of opening/closing the irradiation aperture.4. The X-ray diagnostic apparatus according to claim 2 , whereinthe irradiation aperture is formed by opening/closing the X-ray shielding member, andthe X-ray shielding member is formed of a diaphragm blade member which is divided along a direction of opening/closing the irradiation ...

MULTI-BEAM STEREOSCOPIC X-RAY BODY SCANNER

An X-ray examination station includes a first source of X-ray radiation for whole body scanning of a human body using a first fan beam of X-ray radiation; a first vertical linear radiation detector configured to detect the first fan beam; a second source of X-ray radiation installed at mid-height of a person being examined, for scanning a central portion of the human body using a second fan beam of X-ray radiation; a second vertical detector of X-ray radiation configured to detect the second fan beam; and a control unit configured to turn on each of the X-ray radiation sources. The first and the second radiation fan beams are emitted in parallel planes. The first X-ray radiation source is turned on for the whole body scanning. The second X-ray radiation source is turned on for scanning the central portion of the body. 1. An X-ray examination station comprising:a first source of X-ray radiation for whole body scanning of a human body;a first collimator near the first source of X-ray radiation for forming a first fan beam of X-ray radiation;a first vertical linear radiation detector configured to detect the first fan beam;a second source of X-ray radiation installed at mid-height of a person being examined, for scanning a central portion of the human body;a second collimator near the second source of X-ray radiation for forming a second fan beam of X-ray radiation;a second vertical detector of X-ray radiation configured to detect the second fan beam;a control unit configured to turn on each of the X-ray radiation sources,wherein the first and the second radiation fan beams are emitted in parallel planes;wherein the first X-ray radiation source is turned on for the whole body scanning; andwherein the second X-ray radiation source is turned on for scanning the central portion.2. The system of claim 1 , wherein the first X-ray radiation source and the second X-ray radiation source are turned on simultaneously to form pseudo-stereoscopic images.3. The system of claim 1 , ...

FULL DOSE PET IMAGE ESTIMATION FROM LOW-DOSE PET IMAGING USING DEEP LEARNING

Emission imaging data are reconstructed to generate a low dose reconstructed image. Standardized uptake value (SUV) conversion () is applied to convert the low dose reconstructed image to a low dose SUV image. A neural network () is applied to the low dose SUV image to generate an estimated full dose SUV image. Prior to applying the neural network the low dose reconstructed image or the low dose SUV image is filtered using a low pass filter (). The neural network is trained on a set of training low dose SUV images and corresponding training full dose SUV images to transform the training low dose SUV images to match the corresponding training full dose SUV images, using a loss function having a mean square error loss component () and a loss component () that penalizes loss of image texture and/or a loss component () that promotes edge preservation. 1. An emission imaging data reconstruction device comprising:an electronic processor; and reconstructing emission imaging data to generate a low dose reconstructed image;', 'applying a standardized uptake value (SUV) conversion to convert the low dose reconstructed image to a low dose SUV image; and', 'applying a neural network to the low dose SUV image to generate an estimated full dose SUV image., 'a non-transitory storage medium storing instructions readable and executable by the electronic processor to perform an image reconstruction and enhancement process including2. The emission imaging data reconstruction device of wherein the image reconstruction and enhancement process further includes:prior to applying the neural network, filtering one of the low dose reconstructed image and the low dose SUV image using a low pass filter.3. The emission imaging data reconstruction device of wherein the neural network is trained on a set of training low dose SUV images and corresponding training full dose SUV images to transform the training low dose SUV images to match the corresponding training full dose SUV images.4. The ...

RADIOLOGICAL IMAGING DEVICE WITH IMPROVED FUNCTIONING

A radiological imaging device that includes a source that emits radiation that passes through at least part of a patient, the radiation defining, a central axis of propagation; and a receiving device that receives the radiation and is arranged on the opposite side of the patient with respect to the source. The receiving device includes a first detector to detect radiation when performing at least one of tomography and fluoroscopy, a second detector to detect radiation when performing at least one of radiography and tomography; and a movement apparatus arranged to displace the first and second detectors with respect to the source. The movement apparatus provides a first active configuration in which the radiation hits the first detector and a second active configuration in which the radiation hits the second detector. 1. A radiological imaging device comprising:a source that emits radiation that passes through at least part of a patient, the radiation defining a central axis of propagation; anda receiving device, wherein the receiving device includes at least one flat panel sensor that has a radiation sensitive surface for receiving the radiation and is arranged on the opposite side of the patient with respect to the source, the flat panel sensor being selectably operable in at least a flat panel mode and a linear sensor mode.2. The radiological imaging device of claim 1 , wherein the flat panel mode is adapted to perform at least one of fluoroscopy and tomography claim 1 , and the linear sensor mode is adapted to perform at least one of radiography and tomography.3. The radiological imaging device of further comprisinga gantry defining an analysis zone in which the at least part of the patient is placed;a bed suitable to support the patient and defining an axis of extension;a translation mechanism adapted to translate the source and the receiving device in a direction of movement substantially perpendicular to the central axis of propagation;a rotation mechanism ...

X-ray imaging apparatus and x-ray imaging system

An X-ray imaging apparatus includes an optical device configured to form a periodic pattern using X-rays radiated from an X-ray source, an alignment mark of the optical device, a first detector, a second detector, and a movement unit configured to change at least either a position of the optical device or an angle of the optical device on the basis of a result of detection performed by the second detector. The first detector detects X-rays that have passed through the optical device and a subject, and the second detector detects X-rays that have passed through the alignment mark. The movement unit includes a movement instruction section that instructs the optical device to move on the basis of the result of the detection performed by the second detector and movement sections that move the optical device on the basis of the instruction issued by the movement instruction section.

METHODS FOR PHYSIOLOGICAL STATE DETERMINATION IN BODY SCANS

A system for measuring muscle mass of a patient has a dual-energy radiation emission source. A radiation detector is configured to detect radiation emitted from the dual-energy radiation emission source passed through the patient. A processor has a memory with storing instructions, that when executed by the processor, perform a set of operations. The operations include receiving radiation detection data; generating a scan representation; identifying a primary fat target; determining an amount of fat in the primary fat target; comparing the amount of fat in the primary fat target to a reference; and based on the comparison, correcting an estimated amount of lean tissue to generate a corrected muscle mass value. 1. A system for measuring muscle mass of a patient , the system comprising:a dual-energy radiation emission source;a radiation detector configured so as to detect radiation emitted from the dual-energy radiation emission source passed through the patient;at least one processor; and receiving radiation detection data from the radiation detector;', 'based on the radiation detection data, generating a scan representation;', 'identifying a primary fat target in the scan representation;', 'determining an amount of fat in the primary fat target;', 'comparing the amount of fat in the primary fat target to a reference; and', 'based on the comparison, correcting an estimated amount of lean tissue to generate a corrected muscle mass value., 'a memory coupled to the at least one processor, the memory storing instructions that when executed by the at least one processor, perform a set of operations comprising2. The system of claim 1 , wherein the primary fat target is in a region of interest and the corrected muscle mass value is for the region of interest.3. The system of claim 1 , wherein the primary fat target is for a first region of the patient and the corrected muscle mass value is for a second region of the patient.4. The system of claim 3 , wherein the first ...

X-RAY COLLIMATOR FOR IMAGING SYSTEM

A collimator includes a panel and one or more blades. The panel defines an exit port, and the one or more blades are held between the panel and an X-ray source to cover at least a portion of the exit port. Each of the one or more blades has a primary blocking member and a secondary blocking member with material densities sufficient to block X-ray radiation. The primary blocking member shapes an X-ray beam emitted from the X-ray source. The secondary blocking member is secured in a fixed position relative to the primary blocking member between the primary blocking member and the panel to block scatter radiation from the X-ray beam from emanating through the exit port. The primary blocking member has a substantially non-planar surface facing toward the X-ray source. The secondary blocking member has a substantially planar surface facing toward the X-ray source. 1. A collimator comprising:a panel defining an exit port through which an X-ray beam from an X-ray source emanates towards a detector; andone or more blades held between the panel and the X-ray source and covering at least a portion of the exit port, each of the one or more blades having a primary blocking member and a secondary blocking member with material densities sufficient to block X-ray radiation, the primary blocking member configured to shape the X-ray beam that is emanated through the exit port, the secondary blocking member secured in a fixed position relative to the primary blocking member between the primary blocking member and the panel to block scatter radiation from the X-ray beam from emanating through the exit port,wherein the primary blocking member has a substantially non-planar surface facing toward the X-ray source and the secondary blocking member has a substantially planar surface facing toward the X-ray source.2. The collimator of claim 1 , wherein each of the one or more blades includes a base that engages and holds both the primary blocking member and the secondary blocking member ...

Radiographic imaging apparatus and a method of controlling the same

Disclosed herein are a radiographic imaging apparatus and a method of controlling the radiographic imaging apparatus. The radiographic imaging apparatus may include an imager configured to image a subject to obtain image data; a real-time processor configured to communicate with the imager and configured to obtain a real-time processing authority and perform real-time image processing on the image data; and a non-real-time processor configured to communicate with the imager and configured to perform non-real-time image processing on the image data, and in response to a failure occurring in the real-time processor, obtain the real-time processing authority and perform the real-time image processing on the image data.

X-ray imaging apparatus and x-ray imaging method

The X-ray imaging method includes setting imaging conditions according to characteristics of an object and performing X-ray imaging of the object based on the set imaging conditions. The imaging conditions include at least one of an imaging angle, a number of imaging operations, and an imaging position.

X-RAY IMAGING APPARATUS

This X-ray imaging apparatus () includes a rotation mechanism () for relatively rotating an imaging system () constituted by an X-ray source (), a detector (), a first grating () and a second grating (), and an image processing unit () for generating a dark-field image based on an X-ray intensity distribution at each of a plurality of rotation angles. The image processing unit () is configured to perform a scattering correction for reducing a dark-field signal of a pixel whose dark-field signal is larger than a threshold value (V) among a plurality of pieces of pixels in the dark-field image to a set value (V). 1. An X-ray imaging apparatus comprising:an X-ray source;a detector configured to detect X-rays emitted from the X-ray source;a plurality of gratings arranged between the X-ray source and the detector, the plurality of gratings including a first grating and a second grating;a rotation mechanism configured to relatively rotate a subject and an imaging system relatively to each other, the imaging system including the X-ray source, the detector, and the plurality of gratings; andan image processing unit configured to generate a dark-field image as a result of X-ray scattering based on an intensity distribution of the X-rays detected by the detector at each of a plurality of relative rotation angles of the subject and the imaging system resulting from the relative rotation generated by the rotation mechanism,wherein the image processing unit is configured to perform a scattering correction on one or more targeted pixels included in the dark-field image, the targeted pixels having values related to X-ray scattering intensity, the scattering correction being such that the values of the targeted pixels are reduced to a predetermined set value.2. The X-ray imaging apparatus as recited in claim 1 ,wherein the image processing unit is configured to set, in the scattering correction, the value based on the X-ray scattering intensity of the pixel in which the value based ...

DYNAMIC BOWTIE FILTER AND METHODS OF USING THE SAME

An imaging system () includes a radiation source () that emits radiation that traverses an examination region (), a radiation detector array () with a plurality of detectors (N) that detect the radiation that traverses the examination region, a dynamic bowtie filter () between the radiation source and the examination region, a first motor () and a second motor (), and a controller (). The dynamic bowtie filter includes a first half wedge () and a second half wedge (). The first motor is in mechanical communication with the first half wedge and moves the first half wedge and the second motor is in mechanical communication with the second half wedge and moves the second half wedge. The controller independently controls the first and second motors to move the first and second half wedges. 1. An imaging system , comprising:a radiation source configured to emit radiation that traverses an examination region;a radiation detector array having a plurality of detectors configured to detect the radiation traversing the examination region;a dynamic bowtie filter disposed between the radiation source and the examination region, wherein the dynamic bowtie filter comprises a first half wedge and a separate and distinct second half wedge with a material free space therebetween;a first motor in mechanical communication with the first half wedge, wherein the first motor is configured to move the first half wedge;a second motor in mechanical communication with the second half wedge, wherein the second motor is configured to move the second half wedge; anda controller configured to independently control the first and second motors to move the first and second half wedges to increase or decrease a distance therebetween during an acquisition interval.2. The system of claim 1 , wherein the first half wedge and the second half wedge have a same size claim 1 , shape claim 1 , and density.3. The system of claim 1 , wherein the controller is configured to move the first half wedge and second ...

X-RAY SOURCE AND IMAGING SYSTEM

An evacuable outer housing having at least one X-ray-permeable beam exit window, an electron source, an anode and a collector for catching electrons which penetrate the anode are included as an X-ray source. The collector is part of an electrical current circuit for applying a negative potential to the anode, and the radiation window is disposed such that X-ray radiation which exits from the anode at an angle of 130 degrees to 230 degrees to the electron beam direction can be coupled out through the radiation window. An imaging system includes such an X-ray, an arrangement to accommodate an object to be examined, and an X-ray detector. 115-. (canceled)16. An X-ray source , comprising:an anode generating X-ray radiation;an electron source emitting electrons along an electron beam direction;an evacuable outer housing having at least one beam exit window, transparent to X-rays, arranged such that X-radiation emerging from the anode at least in a subrange of an angle range from 130 degrees to 230 degrees with respect to the electron beam direction is output through the beam exit window; andan electrical circuit, including a collector collecting electrons passing through the anode, applying a negative potential to the collector in relation to a potential at the anode.17. The X-ray source as claimed in claim 16 , wherein the collector is thicker along the electron beam direction than an average penetration depth of the electrons in a material of the collector for the electrons having kinetic energy of 150 keV.18. The X-ray source as claimed in claim 17 , wherein the material of the collector is at least one of stainless steel and copper and has a thickness of at least one millimeter along the electron beam direction.19. The X-ray source as claimed in claim 16 , wherein the collector has a depression in the electron beam direction.2021. The X-ray source as claimed in claim 16 , wherein the depression has at least one of a trapezoidal shape and a depth of at least 3 ...

Selecting acquisition parameter for imaging system

A system and method are provided for selecting an acquisition parameter for an imaging system. The acquisition parameter at least in part defines an imaging configuration of the imaging system during an imaging procedure with a patient. A depth-related map is accessed which is generated on the basis of sensor data from a camera system, wherein the camera system has a field of view which includes at least part of a field of view of the imaging system, wherein the sensor data is obtained before the imaging procedure with the patient and indicative of a distance that parts of the patient's exterior have towards the camera system. A machine learning algorithm is applied to the depth-related map to identify the acquisition parameter, which may be provided to the imaging system.

System and method for imaging a subject

A system for imaging a subject is provided. The system includes a radiation source, a radiation detector, and a controller. The radiation source is operative to transmit electromagnetic rays through the subject while the radiation source travels along a path defined by a sweep angle that is less than 365 degrees. The radiation detector is operative to receive the electromagnetic rays after having passed through the subject. The controller is operative to: acquire preliminary data regarding the subject from a sensor; determine an imaging parameter from the preliminary data; and acquire one or more images of the subject via the radiation source and the radiation detector based at least in part on the imaging parameter.

AN INTEGRATED X-RAY PRECISION IMAGING DEVICE

The invention relates to medical equipment, and particularly relates to an integrated X-Ray precision imaging device, which includes a table, a control module, an X-ray emitting device, an X-ray receiving device, and a thickness measuring mechanism. The X-ray emitting device and the X-ray receiving device are arranged on the table, the X-ray emitting device is located above the X-ray receiving device, the thickness measuring mechanism is provided on the X-ray emitting device, the thickness measuring mechanism and the X-ray emitting device. Both are electrically connected to the control module. By setting a measurement mechanism, the invention can accurately measure the body shape of a patient in real time, and control the precise emission amount of X-rays through the body shape data of the patient to ensure that a clear image is obtained, and at the same time, minimize the possibility of the patient being harmed by ionizing radiation. 167-. (canceled)68. An integrated X-Ray precision imaging device comprising:a table;a control module;an X-ray emitting device;an X-ray detection device;a patient thickness measuring camera integrated with an X-ray collimator;a computer system that automatically adjusts X-ray emission parameters based on measured patient thickness; andwherein the X-ray emitting device and X-ray detection device are both arranged such that the X-ray emitting device is located above an X-ray receiving flat panel, and wherein the thickness measuring stereo camera and the X-ray emitting device are both electrically connected to a micro-computer.69. The integrated X-Ray precision imaging device according to claim 68 , wherein the X-ray emitting device is comprised of a high-voltage generator is stowed within the table base and is electrically connected to the micro-computer claim 68 , an X-ray tube is connected above the X-ray collimator and directs the light downward to the X-ray receiving flat panel; andwherein the thickness measuring camera is arranged on ...

PHASE-CONTRAST X-RAY IMAGING DEVICE

A phase-contrast x-ray imaging device is particularly suited for the medical field. The device includes an x-ray source for generating an x-radiation field and an x-ray detector having a one-dimensional or two-dimensional arrangement of pixels. A phase-contrast differential amplifier is positioned between the x-ray source and the x-ray detector. The phase-contrast differential amplifier amplifies spatial phase differences in the x-radiation field during operation. 114-. (canceled)15. A phase-contrast x-ray imaging device , comprising:an x-ray source for generating an x-radiation field;an x-ray detector having a one-dimensional or two-dimensional arrangement of pixels; anda phase-contrast differential amplifier disposed between said x-ray source and said x-ray detector and configured to amplify spatial phase differences in the x-radiation field during operation.16. The phase-contrast x-ray imaging device according to claim 15 , wherein said phase-contrast differential amplifier is configured such that unaffected x-radiation experiences a uniform phase shift due to said phase-contrast differential amplifier irrespective of an entry position of the unaffected x-radiation at said phase-contrast differential amplifier.17. The phase-contrast x-ray imaging device according to claim 15 , wherein said phase-contrast differential amplifier comprises two diffraction gratings which claim 15 , when viewed in a radiation incidence direction claim 15 , are arranged one behind another.18. The phase-contrast x-ray imaging device according to claim 15 , wherein said phase-contrast differential amplifier has two identical diffraction gratings.19. The phase-contrast x-ray imaging device according to claim 17 , wherein each said diffraction grating comprises:a transverse surface to be aligned substantially at right angles to the radiation incidence direction and being spanned by an x-axis and a y-axis perpendicular thereto; anda plurality of diffraction ridges made of an optically ...

APPARATUS FOR X-RAY BONE DENSITOMETRY

An apparatus for bone densitometry () includes a patient-carrier frame () fitted with a support surface () for a patient and an arm () movable with respect to the frame () in a longitudinal direction (X) from the feet to the head of the patient. The arm is fitted with a generator-detector assembly having an X-ray generator () and an X-ray detector (), mechanically aligned so that the collimated beam (F) of X-rays produced by the generator () centers the detector (). In particular, the frame is a monocoque () and fully supports, at the support surface (), the arm () in order to leave the space underneath the frame () free. Advantageously, moreover, in the case of apparatus with frame () made of aluminum, the frame itself also serves as a filter for X-rays. 113.-. (canceled)14. An apparatus for bone densitometry , comprising:a patient-carrier frame with a support surface for a patient;an arm movable with respect to the frame in a longitudinal direction, from the feet to the head of the patient, and fitted with a generator-detector assembly comprising an X-ray generator and an X-ray detector, mechanically aligned so that a collimated beam of X-rays produced by the generator centers the detector;wherein the frame is a monocoque and fully supports, at the support surface, the arm in order to leave a space underneath the frame free.15. The apparatus for bone densitometry according to claim 14 , wherein the support surface comprises an upper side on which the patient lies claim 14 , and a lower side claim 14 , opposite the upper side claim 14 , wherein a longitudinal movement system of the arm is attached to the lower side.16. The apparatus for bone densitometry according claim 14 , wherein the frame comprises claim 14 , at the support surface claim 14 , a filtering portion for the X-rays.17. The apparatus for bone densitometry according to claim 14 , wherein the frame is made from a single sheet of aluminum folded to form a patient-carrier table.18. The apparatus for bone ...

X-ray CT apparatus with a filtering element exhibiting a maximum absorption at its center

An X-ray computed tomography (=CT) apparatus () has a filter element () for attenuating an X-ray beam (). The filter element () has a spatially varying X-ray absorption capability along a cross direction (y) which is perpendicular to both the beam axis (z) of the X-ray beam and to a rotation axis (x) of a gantry. The spatially varying X-ray absorption capability exhibits a maximum absorption along the cross direction (y) at a zero position (y0), wherein X-rays passing through the filter element () at the zero position (y0) intersect the rotation axis (x). The CT apparatus allows for further reduction of the radiation dose for an object to be investigated, while simultaneously retaining high image quality. 1. An X-ray computed tomography (=CT) apparatus , the apparatus comprising:an X-ray source emitting an X-ray beam or a divergent X-ray beam, along a beam axis;a stage for an object to be investigated with an attenuated X-ray beam;a filter element disposed between said X-ray source and said stage and attenuating said X-ray beam, said filter element having a spatially varying X-ray absorption capability along a cross direction which is perpendicular to both said beam axis and to a rotation axis, said spatially varying X-ray absorption capability exhibiting a maximum absorption along said cross direction at a zero position, wherein X-rays passing through said filter element at said zero position intersect said rotation axis;a 2D X-ray detector disposed downstream of said stage, said 2D X-ray detector having a detection area; anda gantry system structured to simultaneously rotate an entirety of said X-ray source, said filter element and said 2D X-ray detector about said rotation axis or structured to rotate said stage for the object about said rotation axis, wherein said rotation axis is perpendicular to said beam axis.2. The CT apparatus of claim 1 , wherein said filter element is made of a material exhibiting a higher absorption for low energy X-rays than for high ...

Spectral filtration of x-rays for energy-selective x-ray imaging

A filter is disclosed for the spectral filtration of X-rays emanating from an X-ray source which cross an object under examination and are detected by an X-ray detector in at least two different spectral regions. After crossing the object under examination, the X-rays have an energy spectrum which displays a characteristic distribution for the anode material of the X-ray source. In an embodiment, the filter is configured to suppress part of the energy spectrum comprising the focal point of the energy spectrum. A corresponding X-ray system and method are also disclosed.

Photon counting detector and x-ray computed tomography apparatus

According to one embodiment, a photon-counting detector (PCD) includes a plurality of macro-pixels. The plurality of macro-pixels arranged on a semiconductor crystal has a first face and a second face. The first face and the second face are parallel. Each macro-pixel from the plurality of macro-pixels is configured to acquire projection data for generating a reconstructed image. The plurality of macro-pixels each includes at least one large micro-pixel is disposed within the each macro-pixel and at least two small micro-pixels is disposed within the each macro-pixel. Each of the at least two small micro-pixels has a surface area that is less than a surface area of the at least one large micro-pixel.

PROJECTION DATA ACQUISITION APPARATUS AND SUBJECT SUPPORT DEVICE

The invention relates to a subject support device () to be used in a projection data acquisition apparatus () for acquiring projection data of a subject (). The subject support device comprises a support component () providing a support surface () for supporting the subject while acquiring the projection data, a diffraction grating () for diffracting x-rays, and a moving unit () for moving the support component and the diffraction grating relative to each other. This relative movement can allow for a movement of the support component such that the subject is moved through x-rays () for determining projection data of different parts of the subject, while the diffraction grating can still be traversed by the x-rays. These projection data can be used for generating a relatively large phase-contrast and/or dark-field projection image. 1. A subject support device for use in a projection data acquisition apparatus for acquiring projection data of a subject , the subject support device comprising:a support component providing a support surface for supporting the subject while acquiring the projection data;a diffraction grating for diffracting x-rays; anda moving unit for moving the support component and the diffraction grating relative to each other.2. The subject support as defined in claim 1 , wherein the moving unit is configured to move the support component and the diffraction grating in opposite directions.3. The subject support as defined in claim 1 , wherein the diffraction grating is integrated in the support component.4. The subject support device as defined in claim 1 , wherein the subject support device comprises a support foot to be positioned on a floor claim 1 , wherein the moving unit is configured to move at least one of the support component and the diffraction grating relative to the support foot.5. The subject support device as defined in claim 4 , wherein the moving unit is adapted to move at least one of the support component and the diffraction ...

X-ray system and method for generating x-ray image in color

A method for generating an x-ray image in color includes selecting three-sets of x-ray images in gray scale acquired with x-rays having different energy spectra, assigning basic colors RGB to the three-sets, and displaying the x-ray image in color with RGB signals generated. A system for generating an x-ray image in color includes an x-ray generator configured to generate at least three sets of x-rays with different energy spectra, an x-ray detector, a controller, a computer, and a color display. The computer is configured to generate three sets of x-ray images from output data of the x-ray detector acquired for x-rays with different energy spectra, assign RGB and display an x-ray image in color. A non-transitory computer readable medium stores an instruction, when the instruction is executed by a processor, cause the processor to perform the method for generating an x-ray image in color.

X-ray diagnostic apparatus

According to one embodiment, an X-ray diagnostic apparatus includes an X-ray tube, an X-ray detector, an X-ray filter, signal input unit, and an X-ray filter support unit. The X-ray tube generates X-rays. The X-ray detector detects the X-rays transmitted through a subject. The X-ray filter is arranged between the X-ray tube and the object and having an opening. The X-ray filter support unit supports the X-ray filter so as to make the X-ray filter movable in an imaging axis direction of the X-rays.

METHOD FOR RECONSTRUCTION OF SPECTRAL RESULT IMAGE DATA

A method is for imaging of an examination region of an object to be examined with a computed tomography system. In an embodiment, the method includes recording of first and second projection measurement data with a common x-ray source-detector system, the first projection measurement data being recorded with a first x-ray spectrum in a first angular sector and the second projection measurement data being recorded with a second x-ray spectrum in a second angular sector; Creation of first and second start image data from the first and second projection measurement data via a first reconstruction method; and coupled iterative reconstruction of first result image data on the basis of the first start image data and of second result image data on the basis of the second start image data, the first result image data and the second result image data each featuring a complete image of the examination region. 1. A method for producing a complete image of an examination region of an object to be examined using a computed tomography system , the method comprising:recording first projection measurement data and second projection measurement data, different from the first projection measurement data, with a common x-ray source-detector system, the first projection measurement data being recorded with a first x-ray spectrum in a first angular sector of maximum 180° and the second projection measurement data being recorded with a second x-ray spectrum, different from the first x-ray spectrum, in a second angular sector of maximum 180° disjoint from the first angular sector;creating first start image data from the first projection measurement data and creating second start image data from the second projection measurement data via a first reconstruction method; andperforming coupled iterative reconstruction of first result image data based on the first start image data and performing coupled iterative reconstruction of second result image data based on the second start image data, ...

METHOD AND DEVICE FOR THE IMAGING SCANNING OF A FEMALE BREAST IN THE CONTEXT OF DIGITAL PROJECTIVE MAMMOGRAPHY OR TOMOSYNTHESIS

A method image scans a female breast in the context of projective digital mammography or tomosynthesis with prefiltered x-ray radiation. From a single scanning two spatially superimposing images are created on the basis of pixel-by-pixel or pixel-group-by-pixel-group different x-ray energy spectra. An x-ray mammography system contains a radiator-detector system having an x-ray tube with a filter for generating a prefiltered x-ray radiation having a first radiation spectrum and a radiation detector containing a multiplicity of partial areas which generate individual image pixels. The radiator-detector system is configured to the effect that the partial areas receive pixel-by-pixel or pixel-group-by-pixel-group different radiation spectra, such that the two images from different x-ray spectra are received with a single scanning of the female breast. Ideally, the detector is a pixilated x-ray detector with a converting sensor layer that is divided into at least two sets of partial areas, the sets having different thicknesses. 1. A method for imaging scanning of a female breast in a context of projective digital mammography or tomosynthesis with prefiltered x-ray radiation , which comprises the step of:creating at least two spatially superimposing images, from a single scanning of the female breast between two compression plates of a mammography system, on a basis of pixel-by-pixel or pixel-group-by-pixel-group different x-ray energy spectra.2. The method according to claim 1 , which further comprises generating the at least two spatially superimposing images on the basis of the different x-ray energy spectra on account of different radiation spectra of impinging x-ray radiation impinging on pixel-forming detector elements of a detector.3. The method according to claim 1 , which further comprises generating the at least two spatially superimposing images on the basis of the different x-ray energy spectra on account of different absorption spectra in pixel-forming ...

RADIOLOGICAL IMAGING DEVICE WITH ADVANCED SENSORS

A radiological imaging device that includes a gantry defining an analysis zone in which at least part of a patient is placed, a source suitable to emit radiation defining a central axis of propagation; a detector suitable to receive the radiation, a translation mechanism adapted to translate the source and the detector in a direction of movement substantially perpendicular to the central axis of propagation; and a control unit adapted to acquire an image from data signals received continuously from the detector while the translation mechanism continuously translates the source emitting the radiation and the detector receiving the radiation, so as to scan the at least part of the patient. 1. A radiological imaging device comprising:a gantry defining an analysis zone in which at least part of a patient is placed;a source suitable to emit radiation that passes through the at least part of the patient, the radiation defining a central axis of propagation;a detector suitable to receive the radiation, and the detector includes at least one flat panel sensor having a radiation sensitive surface and operable in at least a flat panel mode and a linear sensor mode;a translation mechanism adapted to translate the source and the detector in a direction of movement substantially perpendicular to the central axis of propagation; anda control unit adapted to acquire an image from data signals received continuously from the detector while the translation mechanism continuously translates the source emitting the radiation and the detector receiving the radiation, so as to scan the at least part of the patient.2. The radiological imaging device according to claim 1 , further comprising a bed suitable to support the patient and defining an axis of extension.3. The radiological imaging device according to claim 2 , wherein the direction of movement is substantially parallel to the axis of extension.4. The radiological imaging device according to claim 2 , further comprising a rotation ...

Determination of a multi-energy image

A method is disclosed for determining a multi-energy image via an x-ray device, including an x-ray source and an x-ray detector. The method includes a temporal sequence of individual steps. A first contrast agent-assisted image of an object area is first recorded with a first energy. Then a second contrast agent-assisted image of an object area is recorded with a second energy. A third recording of a third contrast agent-assisted image of the object area is now made with the first energy. By taking the temporal change in the contrast agent signal into account between the first and the third image, a multi-energy image is finally determined by means of the three recordings.

RADIOGRAPHIC APPARATUS

A radiation imaging apparatus discriminates a light exposure field of visible light regardless of the color of the clothes (gown) of a subject. The apparatus for the X-ray imaging apparatus has an adjustable exposure field and a color sensor mounted to the underside of a collimator detects a color of the clothes (gown) worn by the subject on the table. Each light amount of a first LED that emits a red light, a second LED that emits a green light and a third LED that emits a blue light and a fourth LED that emits a white light is individually adjusted based on the color of the clothes worn by the subject, which the color sensor discriminates. 1. A radiation imaging apparatus , comprising:a radiation irradiation unit;a radiation detector that detects a radiation that is irradiated from said radiation irradiation unit and transmits through a subject;a collimator that comprises a plurality of collimator-leaves that modifies an exposure field of said radiation that is irradiated from said radiation irradiation unit to said subject;a light source that emits a visible light to visually discriminate a radiation exposure field that is adjusted with said collimator-leaves;a discriminator that discriminates a color of clothes worn by said subject; anda color modification unit that modifies said color of said visible light, which said light source emits, based upon said color of a clothes worn by said subject, which said discriminator discriminates.2. The radiation imaging apparatus claim 1 , according to claim 1 , wherein:said discriminator is a color sensor that discriminates the color of clothes worn by said subject.3. The radiation imaging apparatus claim 2 , according to claim 2 , wherein:the light source further comprises a first LED that emits a red light, a second LED that emits a green light, and a third LED that emits a blue light.4. The radiation imaging apparatus claim 3 , according to claim 3 , wherein:said light source further comprises a fourth LED that emits a ...

THORACIC DIAGNOSIS ASSISTANCE SYSTEM AND COMPUTER READABLE STORAGE MEDIUM

Provided is a thoracic diagnosis assistance system. The system includes, an imaging unit, an extracting unit, a region dividing unit, an analysis unit and a display unit. The extraction unit extracts a lung field region from the plurality of successive image frames generated by the imaging unit. The region dividing unit divides the lung field region extracted by the extraction unit into a plurality of sub-regions and correlates the sub-regions among the plurality of image frames. The analysis unit performs an analysis of the sub-regions to calculate an inspiratory feature quantity and an expiratory feature quantity and to calculate a value of a ratio of the calculated inspiratory feature quantity to expiratory feature quantity and creates a histogram of the calculated ratio value. The display unit displays the histogram. 1. A dynamic imaging method which successively irradiates radiation on a subject to obtain a series of image frames , the method characterized in that:imaging is performed in a state without attaching a grid to remove scattered radiation.2. A dynamic imaging apparatus which successively irradiates radiation on a subject from a radiation source , receives radiation transmitted through the subject with a radiation detecting unit , and obtains a series of image frames , the apparatus characterized in that:a grid to remove scattered radiation is not attached.3. A diagnosis assistance information generating system including ,a dynamic imaging apparatus which successively irradiates radiation on a subject from a radiation source, receives radiation transmitted through the subject with a radiation detecting unit, and obtains a series of image frames; andan analysis apparatus which obtains data of the series of image frames from the dynamic imaging apparatus, calculates a feature quantity based on the data of the series of image frames, and generates diagnosis assistance information regarding the subject based on the feature quantity, the system ...

Method for image fusion based on principal component analysis

An image fusion method combines absorption, differential phase contrast and dark-field (scattering) signals obtained with X-ray phase contrast sensitive techniques, such as an arrangement of gratings. The process fuses the absorption and dark-field signals by principal component analysis. Further the differential phase contrast is merged into the PCA fused image to obtain an edge enhancement effect. Due to its general applicability and its simplicity in usage, the proposed process is usable as a standard method for image fusion scheme using phase contrast imaging, in particular on medical scanners (for instance mammography), inspection at industrial production lines, non-destructive testing, and homeland security.

METHOD FOR CREATING A SYNTHETIC MAMMOGRAM ON THE BASIS OF A DUAL ENERGY TOMOSYNTHESIS RECORDING

A method is for creating a synthetic mammogram based upon a dual energy tomosynthesis recording of an examination region. In an embodiment the method includes making a low energy tomosynthesis recording with a first X-ray energy spectrum; making a high energy tomosynthesis recording with a second X-ray energy spectrum of relatively higher energy compared with the first X-ray energy spectrum, wherein the examination region includes a contrast medium distribution; determining a subtraction volume based upon the high energy tomosynthesis recording and the low energy tomosynthesis recording; generating a three-dimensional probability map with a weighting factor per voxel based upon the subtraction volume; and creating a synthetic mammogram based upon the three-dimensional probability map. 1. A method for creating a synthetic mammogram based upon a dual energy tomosynthesis recording of an examination region , the method comprising:making a low energy tomosynthesis recording with a first X-ray energy spectrum;making a high energy tomosynthesis recording with a second X-ray energy spectrum of relatively higher energy compared with the first X-ray energy spectrum, wherein the examination region includes a contrast medium distribution;determining a subtraction volume based upon the high energy tomosynthesis recording and the low energy tomosynthesis recording;generating a three-dimensional probability map with a weighting factor per voxel based upon the subtraction volume; andcreating a synthetic mammogram based upon the three-dimensional probability map.2. The method of claim 1 , wherein in the creating claim 1 , a first synthetic mammogram is generated based upon the low energy tomosynthesis recording.3. The method of claim 2 , wherein in the creating claim 2 , by way of forward projection of the three-dimensional probability map claim 2 , a two-dimensional probability map is generated.4. The method of claim 3 , wherein the synthetic mammogram is a superposition of the ...

PHOTON COUNTING APPARATUS

According to on embodiment, The X-ray tube generates X-rays. The X-ray detector detects the X-rays transmitted through a subject. The data acquisition circuitry acquires count data concerning a count number of the detected X-rays for energy bands. The memory circuitry stores data of a response function that associates incident X-rays on the X-ray detector with a response characteristic of a system including the X-ray detector and the data acquisition circuitry. The processing circuitry calculates an X-ray absorption amount of each of a plurality of base substances based on the count data concerning the energy bands acquired by the data acquisition circuitry, an energy spectrum of the incident X-rays, and the response function. 1. A photon counting apparatus comprising:an X-ray tube configured to generate X-rays;an X-ray detector configured to detect the X-rays generated by the X-ray tube and transmitted through a subject;a data acquisition circuitry configured to acquire count data concerning a count number of the detected X-rays for a plurality of energy bands based on an output signal from the X-ray detector;a memory circuitry configured to store data of a response function that associates incident X-rays on the X-ray detector with a response characteristic of a system including the X-ray detector and the data acquisition circuitry; anda processing circuitry configured to calculate an X-ray absorption amount of each of a plurality of base substances based on the count data concerning the plurality of energy bands acquired by the data acquisition circuitry, an energy spectrum of the incident X-rays generated by the X-ray tube, and the response function readout from the memory circuitry.2. The apparatus according to claim 1 , where the processing circuitry reconstructs an image based on the X-ray absorption amount of each of the plurality of base substances.3. The apparatus according to claim 1 , where the processing circuitry calculates a difference between the ...

SUPPRESSION OF INTERFERENCE EFFECTS IN THE CAPACITIVE MEASUREMENT OF BIOELECTRIC SIGNALS

An interference signal compensation facility in a differential voltage measuring system including a signal measuring circuit for measuring bioelectric signals with a number of useful signal paths, each with a capacitive sensor electrode for the acquisition of a measurement signal, is described. The interference signal compensation facility includes at least one capacitive reference electrode, set up to acquire a reference signal which possibly includes an interference signal generated by an external interference source. Furthermore, the interference signal compensation facility includes an echo compensation unit, set up to filter the measurement signal based upon the capacitively acquired reference signal and to determine an interference-compensated measurement signal. A differential voltage measuring system is also described. Moreover, an X-ray imaging system is described. In addition, a method for generating an interference-reduced biological measurement signal is described. 1. An interference signal compensation facility in a differential voltage measuring system including a signal measuring circuit for measuring bioelectric signals including a number of useful signal paths , each signal path of the number of useful signal paths including a capacitive sensor electrode for acquisition of a measurement signal , the interference signal compensation facility comprising:at least one capacitive reference electrode, set up to acquire a reference signal; andan echo compensation unit, set up to filter the measurement signal based upon the reference signal capacitively acquired and to determine an interference-compensated measurement signal.2. The interference signal compensation facility of claim 1 , wherein the at least one capacitive reference electrode is set up to acquire an interference signal generated by X-rays as the reference signal.3. The interference signal compensation facility of claim 1 , wherein a respective capacitive reference electrode claim 1 , of the ...

X-RAY IMAGING APPARATUS AND CONTROL METHOD FOR THE SAME

An X-ray imaging apparatus includes an X-ray source configured to radiate X-rays to a region of a subject, an X-ray detector configured to acquire a plurality of frame images related to the region of the subject by detecting the radiated X-rays, a filter configured to filter the X-rays radiated from the X-ray source, an image processor configured to set a region of interest within the region of the subject based on the plurality of frame images, and a controller configured to control the filter so that X-rays of a lower dose than a dose of X-rays made incident on the region of interest are made incident on a region of non-interest within the region of the subject, and control the X-ray detector so that a gain of the X-ray detector in the region of non-interest is greater than that in the region of interest. 1. An X-ray imaging apparatus comprising:an X-ray source configured to radiate X-rays to a region of a subject;an X-ray detector configured to acquire a plurality of frame images related to the region of the subject by detecting the radiated X-rays;a filter configured to filter the X-rays radiated from the X-ray source;an image processor configured to set a region of interest within the region of the subject based on the plurality of frame images; anda controller configured to control the filter so that X-rays of a lower dose than a dose of X-rays made incident on the region of interest are made incident on a region of non-interest within the region of the subject, and control the X-ray detector so that a gain of the X-ray detector in the region of non-interest is greater than a gain of the X-ray detector in the region of interest.2. The X-ray imaging apparatus according to claim 1 , wherein the controller is configured to control the X-ray detector in such a manner that a gain difference between the gain of the X-ray detector in the region of non-interest and the gain of the X-ray detector in the region of interest is proportional to a difference between the ...

RADIATION BLOCKING UNIT, RADIOGRAPHIC IMAGING APPARATUS, AND RADIOGRAPHIC IMAGING METHOD

The present invention provides a radiation blocking unit including: an attachment member that is attachable between sources and an object table surface to which radiation from a radiation source and visible light from a visible light source are emitted, the sources including the radiation source and the visible light source; a radiation blocking portion, disposed on the attachment member, that transmits the illuminated visible light to an overlapping incidence region on the object table surface in which an incidence region of the radiation and an incidence region of the visible light overlap, and that blocks the irradiated radiation outside the overlapping incidence region; and a visible light blocking portion, disposed on the attachment member, that transmits the irradiated radiation to the overlapping incidence region, and blocks the illuminated visible light outside the overlapping incidence region. 1. A radiographic imaging method comprising:detecting a position of an examination object on an object table surface;setting an observation region for observing a tissue that has been collected from the examination object outside a boundary of the examination object on the object table surface, based on the position of the examination object;emitting visible light from a visible light source to the observation region by using a visible light blocking portion that transmits visible light that indicates an incidence region of radiation at the observation region and that blocks the illuminated visible light outside the observation region; andemitting the radiation from a radiation source to the observation region by using a radiation blocking portion that transmits the radiation that is irradiated to the observation region and that blocks the irradiated radiation outside the observation region; andgenerating a radiographic image of the tissue on the basis of the radiation that has been emitted to the observation region.2. The radiographic imaging method of claim 1 , ...

BEAM FILTER ASSEMBLY AND BEAM FILTER POSITIONING DEVICE

In a beam filter assembly, a base filter is employed to modify a beam quality of a radiation beam of a base energy level and a first filter slice is stacked with the base filter to modify a beam quality of a radiation beam of a first energy level higher than the base energy level. In a beam filter positioning device, a base stage carries a base filter and a first stage carries a filter slice. The base stage is provided with a first engagement site and a second engagement site. The first stage is provided with a first engagement site, a second engagement site, and an open port. The first stage and the base stage are each independently movable relative to the beamline. The first stage is engageable with the base stage when at least one of the first and second engagement sites of the first stage is aligned with at least one of the first and second engagement sites of the base stage, and is further movable with the base stage in unison when engaged. 1. A beam filter assembly , comprising:a base filter configured to modify a beam quality of a radiation beam of a base energy level; anda first filter slice, wherein the first filter slice is stackable with the base filter when in use to modify a beam quality of a radiation beam of a first energy level higher than the base energy level.2. The beam filter assembly of claim 1 , wherein the base filter and the first filter slice are each independently movable in and/or out of a beamline.3. The beam filter assembly of claim 1 , wherein the base filter and the first filter slice are each independently movable in and/or out of a beamline by a linear motion axis.4. The beam filter assembly of claim 1 , wherein the base filter and the first filter slice are each independently movable in and/or out of a beamline by a rotary motion axis.5. The beam filter assembly of claim 1 , wherein the base filter is configured to modify an energy spectrum of the radiation beam of the base energy level claim 1 , and the first filter slices is ...

RADIATION IMAGING SYSTEM AND RADIATION IMAGING METHOD

A radiation imaging system and a radiation imaging method are provided. The radiation imaging system includes a remote-control module and an imaging device. The imaging device has a radiation isolation cavity. The radiation isolation cavity includes a radiation irradiation area adapted for placing an object under test. The imaging device includes a controller, a radiation source, and a flat panel detector. The radiation source is disposed on a top of the radiation isolation cavity and faces the radiation irradiation area. The flat panel detector is disposed below the radiation exposure area. During a preparation for exposure, the controller turns on the radiation source. When the controller receives an activation signal output by the remote-control module, the controller operates the flat panel detector to obtain a radiation image corresponding to the object under test. 1. A radiation imaging system , comprising:a remote-control module; and a controller, coupled to the remote-control module;', 'a radiation source, coupled to the controller, disposed on a top of the radiation isolation cavity, wherein the radiation source faces the radiation irradiation area; and', 'a flat panel detector, coupled to the controller, disposed below the radiation irradiation area,, 'an imaging device, having a radiation isolation cavity, wherein the radiation isolation cavity comprises a radiation irradiation area adapted for placing an object under test, wherein the imaging device compriseswherein during a preparation for exposure, the controller turns on the radiation source, and when the controller receives an activation signal output by the remote-control module, the controller operates the flat panel detector to obtain a radiation image corresponding to the object under test.2. The radiation imaging system according to claim 1 , wherein the imaging device further comprises:a mechanical shutter, coupled to the controller,wherein the radiation source is a continuous X-ray light ...

Method and device for changing the spatial intensity distribution of an x-ray beam

A method is for changing a spatial intensity distribution of an x-ray beam. In an embodiment, the method includes generating an x-ray beam by an x-ray source; guiding a beam path of the x-ray beam through a form filter with a plurality of lamellas, the form filter including a holder apparatus and the plurality of lamellas being arranged in the holder apparatus such that each lamella has at least one straight line running through the respective lamella in parallel to the further lamellas. The method further includes aligning the plurality of lamellas relative to the beam path by controlled movement of at least one part of the plurality of lamellas relative to one another and thereby changing the spatial intensity distribution of the x-ray beam. An apparatus, configured to carry out such a method, an irradiation arrangement and a medical imaging apparatus are further disclosed.

Image processing apparatus, radiation imaging system, image processing method, and non-transitory computer-readable storage medium

An image processing apparatus comprises a generating unit configured to generate, using a plurality of radiation images corresponding to mutually different radiation energies, a first material decomposition image that indicates a thickness of a first material and a second material decomposition image that indicates a thickness of a second material that differs from the first material. The generating unit generates, using the first material decomposition image and the second material decomposition image, a thickness image in which the thickness of the first material and the thickness of the second material are added together.

SYSTEMS AND RELATED METHODS FOR STATIONARY DIGITAL CHEST TOMOSYNTHESIS (S-DCT) IMAGING

Systems and related methods for stationary digital chest tomosynthesis (s-DCT) imaging are disclosed. In some aspects, systems include a stationary x-ray source array with an array of x-ray pixels configured to generate x-ray beams at different viewing angles relative to a subject to be imaged that is stationary, a stationary area x-ray detector configured to record x-ray projection images of the subject, a physiological gating apparatus for monitoring at least one physiological signal of the subject and defining a physiological phase and a time window based on the at least one physiological signal, and a computing platform configured to activate the x-ray pixels based on the physiological phase and the time window and upon receipt of the at least one physiological signal from the physiological gating apparatus in order to synchronize x-ray exposure with the at least one physiological signal of the subject. 1. A system for stationary x-ray digital tomosynthesis imaging , the system comprising:a stationary x-ray source array comprising an array of spatially distributed x-ray pixels configured to generate x-ray beams at different viewing angles relative to a subject to be imaged that is stationary;a stationary area x-ray detector positioned substantially parallel to a plane of the x-ray source array and configured to record x-ray projection images of the subject from the different viewing angles for tomosynthesis reconstruction;a physiological gating apparatus for monitoring at least one physiological signal of the subject, the physiological gating apparatus defining a physiological phase and a time window based on the at least one physiological signal during which the x-ray projection images of the subject from the different viewing angles are acquirable; anda computing platform comprising at least one hardware processor and a memory, the computing platform being configured to activate the x-ray pixels based on the physiological phase and the time window and upon ...

X-ray imaging apparatus and monochromatic x-ray generating method

An X-ray imaging apparatus according to an embodiment of the present disclosure includes an X-ray tube, a photon counting X-ray detector, and a filter unit. A generating unit of the X-ray tube is configured to generate X-rays. The photon counting X-ray detector is configured to count photons contained in the X-rays. The filter unit is provided between the X-ray tube and the photon counting X-ray detector. The filter unit includes a first filter and a second filter. The first filter is configured to shape a spectrum of the X-rays. The second filter is configured to generate X-ray fluorescence on the basis of X-rays related to a spectrum resulting from the shaping by the first filter.

RADIOGRAPHIC APPARATUS AND METHOD OF USING THE SAME

A radiographic apparatus and method of obtaining images using a radiographic apparatus are disclosed. The radiographic apparatus and method use a filter having different regions for different radiation states. The filter is configured to be moved during different irradiating radiation steps. The radiation from the different steps is detected and may be used to generate an image. 1. A radiographic apparatus comprising:a radiation source that irradiates radiation toward a subject;radiation source control means for controlling a voltage of the radiation source;radiation source moving means for moving the radiation source with respect to the subject;radiation source movement control means for controlling the radiation source moving means;a filter having a high voltage region through which the radiation irradiated when the radiation source is in a high voltage state passes and a low voltage region through which the radiation irradiated when the radiation source is in a low voltage state passes;a holder that moves in accordance with a movement of the radiation source and holds the filter;holder rotation means for rotating the holder;holder rotation control means for controlling the holder rotation means;radiation detection means for detecting the radiation passed through the filter and the subject; andimage generation means for generating an image based on an output of the radiation detection means.2. The radiographic apparatus as recited in claim 1 , wherein the holder rotation means is configured to switch whether or not radiation irradiated from the radiation source passes through the filter claim 1 , move the high voltage region of the filter to a position where the radiation passes through when the radiation source is in the high voltage state and move the low voltage region of the filter to a position where the radiation passes through when the radiation source is in the low voltage state.3. The radiographic apparatus as recited in claim 1 , wherein the holder ...

DYNAMIC BOWTIE FILTER FOR CONE-BEAM/MULTI-SLICE CT

Dynamic bowties, imaging systems including a bowtie, and methods of imaging including such bowties or systems are provided. A bowtie can be a three-dimensional (3-D) dynamic bowtie and can include a highly-attenuating bowtie (HB) and a weakly-attenuating bowtie (WB). The HB can be filled with a liquid, and the WB can be immersed in the liquid of the HB. 1. A dynamic bowtie filter for computed tomography (CT) , comprising:a highly-attenuating bowtie (HB) comprising a liquid contained within a first container; anda weakly-attenuating bowtie (WB) immersed within the liquid of the HB and comprising a second container.2. The dynamic bowtie filter according to claim 1 , wherein the WB comprises air within the second container claim 1 , such that the WB is an air chamber.3. The dynamic bowtie filter according to claim 1 , wherein the WB is configured to rotate in synchrony with a radiation source during CT scanning4. The dynamic bowtie filter according to claim 1 , wherein the WB is configured to translate in synchrony with an object to be imaged during CT scanning5. The dynamic bowtie filter according to claim 1 , wherein the WB is a scaled-down version of an object to be imaged during CT scanning6. The dynamic bowtie filter according to claim 5 , wherein the WB is a ⅓ to ⅕ scale version of an object to be imaged during CT scanning7. The dynamic bowtie filter according to claim 1 , wherein the first container is an aluminum container.8. The dynamic bowtie filter according to claim 7 , wherein each wall of the first container has a thickness of 0.5 millimeters (mm) or less.9. The dynamic bowtie filter according to claim 1 , wherein the second container is a plastic container.10. The dynamic bowtie filter according to claim 9 , wherein each wall of the second container has a thickness of 0.2 millimeters (mm) or less.11. The dynamic bowtie filter according to claim 1 , wherein the liquid of the HB has a density that is greater than that of water.12. The dynamic bowtie filter ...

Device and method for x-ray phase contrast imaging

A device for slot scanning phase contrast x-ray imaging, includes an x-ray emitter, a plurality of x-ray gratings, a patient couch, and an x-ray detector. Position marker elements are arranged and configured in the beam path of the x-ray emitter such that the position marker elements are visible in an x-ray image. In the x-ray image, a relative position of an object on the patient couch in relation to an x-ray beam fan of the x-ray emitter may be established from a location and a distance of the position marker elements from one another. 1. A device for slot scanning phase contrast x-ray imaging , the device comprising:an x-ray emitter;a plurality of x-ray gratings;a patient couch;an x-ray detector; anda plurality of position marker elements arranged in a beam path of the x-ray emitter, the plurality of position marker elements being configured and arranged to be visible in an x-ray image,wherein a relative position of an object on the patient couch in relation to an x-ray beam fan of the x-ray emitter is establishable from a location and a distance of the plurality of position marker elements from one another in the x-ray image.2. The device of claim 1 , wherein the plurality of position marker elements include a first position marker element and a second position marker element.3. The device of claim 2 , wherein the first position marker element is arranged on one x-ray grating of the plurality of x-ray gratings and the second position marker element is arranged on the patient couch.4. The device of claim 3 , wherein the plurality of position marker elements comprises a plurality of second position marker elements claim 3 , the plurality of second position marker elements comprising the second marker element claim 3 , andwherein the plurality of second position marker elements are arranged on a surface of a couch board of the patient couch in a longitudinal direction of the couch board.5. The device of further comprising:an image processing unit configured to ...

Quantitative x-ray radiology using the absorption and scattering information

A quantitative radiographic method uses X-ray imaging. The method uses a ratio of the absorption signal and the (small-angle) scattering signal (or vice-versa) of the object as a signature for the materials. The ratio image (dubbed R image) is independent from the thickness of the object in a wide sense, and therefore can be used to discriminate materials in a radiographic approach. This can be applied to imaging systems, which can record these two signals from the underlying object (for instance, an X-ray grating interferometer). Possible applications could be in material science, non-destructive testing and medical imaging. Specifically, the method can be used to estimate a volumetric breast density. The use of the R image and the corresponding algorithm are also presented hereafter.