УСТРОЙСТВО, ОГРАНИЧИВАЮЩЕЕ ПОЯВЛЕНИЕ ОБНАРУЖЕНИЯ ЛОЖНЫХ ИЗОБРАЖЕНИЙ ДЛЯ ГАММА КАМЕРЫ С КОДИРУЮЩЕЙ МАСКОЙ

... 1. Устройство, ограничивающее появление обнаруженных ложных изображений для гамма камеры с кодирующей маской (1), содержащее детектор гамма излучения (3), расположенный напротив кодирующей маски и имеющий поле обзора, включающее область частичного кодирования (20) кодирующей маской, отличающееся тем, что содержит утопленную часть (30), которая непрозрачна для гамма излучения и расположена напротив детектора (3) относительно кодирующей маски (1), при этом указанная утопленная часть (30) перекрывает область частичного кодирования (20) поля обзора для детектора (3) и имеет толщину, которая изменяется по ее длине с тем, чтобы гамма фотон останавливался бы, пройдя одну и ту же толщину материала, независимо от его пути между областью частичного кодирования (20) поля обзора и детектором (3). ! 2. Устройство по п.1, отличающееся тем, что утопленная часть (30) имеет стенку в виде цилиндра, усеченного конуса, пирамиды или даже многоугольника. ! 3. Устройство по п.2, отличающееся тем, что утопленная ...

Three dimensional X or gamma:ray image former - has coding apertures set at phase angle separation to produce images eventually reconstructed to three dimensional figure

The system is for production of three dimensional images using objects transmission illuminated, or illuminated by X or Y rays, in which coding apertures are used to produce shadow type images, from which the effect image is eventually reconstructed by optical and/or electronic methods, has two shadow images produced using two coding apertures which are set at specific phase angles to one another. The shadow images are then reconstructed using similar phase angle separation such that only a real image or only a virtual image of the original object exposed is produced.

Radiation detector

Polychromic digital radiography detector with patterned mask for single-exposure energy-sensitive-x-ray imaging

Polychromic digital radiography detector with patterned mask for single-exposure energy-sensitive-x-ray imaging

ABBILDUNGSSYSTEM

MECHANISM TO THE ILLUSTRATION RAUMLICH OF AN EXPANSION SOURCE OF A HIGH-ENERGY RADIATION

IMAGING SYSTEM WITH CODED OPENING AND SQUARELY, MORE ANTISYMMETRIC, EVEN OF REDUNDANT GITTERANORDNUNG

Apparatus for inspecting objects using coded beam

3-d imaging using a confocal coded-aperture

Coded aperture imaging

System and method for the detection of abnormal radiation exposures using pulsed optically stimulated luminescence

RADIOGRAPHIC IMAGING SYSTEM FOR HIGH ENERGY RADIATION

RADIOGRAPHIC IMAGING SYSTEM FOR HIGH ENERGY RADIATION A radiographic imaging system for high energy radiation utilizing a detector of such radiation and a mask having regions relatively transparent to such radiation interspersed among regions relatively opaque to such radiation. A relative motion is imparted between the mask and the detector, the detector providing a time varying signal in response to the incident radiation and in response to the relative motion. The time varying signal provides, with the aid of a decoder, and image of a source of such radiation.

PROCESSING METHOD FOR CODED APERTURE SENSOR

This invention relates to a method of processing for a coded aperture ima ging apparatus which is useful for target identification and tracking. The m ethod uses a statistical scene model and, preferably using several frames of data, determines a likelihood of the position and/or velocity of one or mor e targets assumed to be in the scene. The method preferably applies a recurs ive Bayesian filter or Bayesian batch filter to determine a probability dist ribution of likely state parameters. The method of the present invention act s upon the acquired data directly without requiring any processing to form a n image.

METHOD FOR CORRECTING A SPECTRUM

SYSTEM AND METHOD FOR THE DETECTION OF ABNORMAL RADIATION EXPOSURES USING PULSED OPTICALLY STIMULATED LUMINESCENCE

This invention relates generally to luminescence techniques for imaging radiation fields and, more specifically, to the use of experimental and mathematical methods to distinguish between dynamic irradiation and static - or other abnormal radiation - exposure conditions for applications in personnel and environmental radiation dosimetry, or related fields. In more particular, the instant invention provides a rapid and reliable method of detecting abnormal dosimeter exposure conditions over a wide dynamic range of radiation doses, while avoiding significant background interference and stimulation light leakage. Additionally, the preferred embodiment of the instant invention uses a pulsed and synchronized luminescence detection scheme. Further, this invention teaches a complete method and system for abnormal exposure detection - including the use of a luminescent thin powder layer, the use of a periodic radiation absorbing filter, the pulsed stimulation and synchronized luminescence detection ...

CHARACTERISTIC X-RAY COMPUTED LAMINOGRAPHY SYSTEM FOR HOME MADE EXPLOSIVES (HME) DETECTION

A homemade explosives (HME) detection system provides a coded-source, x-ray computed laminography imaging system which detects material composition by the ratio of the transmitted characteristic X-rays within a coded x-ray beam. Motion-free 3-Dimensional geometrical details are obtained through computed laminography imaging techniques.

CODED APERTURE MASKS FOR RADIATION-BASED MEDICAL IMAGING

This invention relates to a coded aperture mask for use in diagnostic nuclear medicine imaging. The coded aperture mask consists of a sheet of radiation opaque mask material having a series of apertures extending therethrough. The thickness of mask material has an attenuation percentage of less than 75% and, in a preferred embodiment, about equal to 29%. The coded aperture mask also, in a preferred embodiment, has a lead attenuation tube and has a projection of the smallest hole occupying the same area as a single pixel of a detector. The invention extends to a diagnostic nuclear medicine imaging system which uses a 16 bit gamma camera as a radiation detector.

Patent RU2016150551A3

РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2016 150 551 A (51) МПК G21K 5/10 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2016150551, 22.05.2015 (71) Заявитель(и): ОСТРЕЙЛИАН НЬЮКЛИАР САЙЕНС ЭНД ТЕКНОЛОДЖИ ОРГАНАЙЗЕЙШН (AU) Приоритет(ы): (30) Конвенционный приоритет: 22.05.2014 AU 2014901905 (85) Дата начала рассмотрения заявки PCT на национальной фазе: 22.12.2016 (86) Заявка PCT: (72) Автор(ы): ПРОКОПОВИЧ Дейл (AU), ФЛИНН Элисон (AU), САРБУТТ Адам (AU), БОАРДМАН Дэвид (AU) (87) Публикация заявки PCT: WO 2015/176115 (26.11.2015) R U (54) ВИЗУАЛИЗАЦИЯ ГАММА-ИЗЛУЧЕНИЯ (57) Формула изобретения 1. Устройство маски для использования при измерении поступающего гаммаизлучения, содержащее: две вложенные одна в другую кодирующие маски, каждая маска имеет корпус, сформированный из материала, который модулирует интенсивность поступающего гамма-излучения; каждая маска имеет множество областей апертур маски, которые не модулируют гамма-излучение; причем по меньшей мере одна маска вращается относительно другой. 2. Устройство по п. 1, в котором обе маски имеют цилиндрическую форму. 3. Устройство по п. 2, в котором каждая маска имеет верхнюю и нижнюю части, которые покрыты защитным экраном от гамма-излучения. 4. Устройство по п. 1, в котором обе маски являются полусферическими. 5. Устройство по любому одному из пп. 1-4, в котором указанное множество областей апертур маски равно степени числа 2. 6. Устройство маски по любому из пп. 1-5, в котором каждая маска сформирована из материала, выбранного из группы, включающей в себя: вольфрам, свинец, золото, тантал, гафний и их сплавы. 7. Устройство по любому из пп. 1-5, в котором каждая маска сформирована из материала, который модулирует поступающее гамма-излучение и нейтроны. Стр.: 1 A 2 0 1 6 1 5 0 5 5 1 A Адрес для переписки: 109012, Москва, ул. Ильинка, 5/2, ООО "Союзпатент" 2 0 1 6 1 5 0 5 5 1 AU 2015/000302 (22.05.2015) R U (43) Дата публикации заявки: 25.06.2018 Бюл. № 18 8 ...

Processing method for coded apperture sensor

Processing methods for coded aperture imaging

SYSTEM AND METHOD FOR FORMING AN IMAGE

Radiation device or signal

METHOD OF FORMING AN IMAGE OF AN ORGAN OF A LIVING BODY CONTAINING RADIOACTIVE MATERIAL

... 1379084 Tomography RAYTHEON CO 4 Oct 1972 [1 Nov 1971] 45795/72 Heading H4D [Also in Division G2] In tomographic apparatus determining the distribution of radioactive isotope from a tracer fed body, e.g. thyroid gland and 11, Fig. 1, the radiation from a single point passes to an "Anger" type assembly of scintillation crystal 17 and detector array 18 via a Fresnel type grating Fig. 2, having concentric annular slits 16 in a radiation opaque slab 15, the areas of all the slits and intervening slab annulli being the same (radii varying as the square root of the set 1 to N). A hologram type of pattern is thus produced in the crystal and is displayed on C.R.T. 23 by means of known computer 19. The hologram pattern is transferred to a film 24, Fig. 4, and the image of the radioactive distribution produced therefrom by collimated laser light source 30, 31 prime image stop 35 and ground glass projection screen 36. By varying the distances of the laser optics, various depth planes in the distribution ...

No details

IMAGING SYSTEM

PROCEDURE AND DEVICE FOR THE ILLUSTRATION WITH CODED SCREEN

ZONE PLATE IMAGING SYSTEM FOR RECORDING SHADOW HOLOGRAMS

METHODS AND SYSTEMS FOR HIGH PERFORMANCE AND VERSATILE MOLECULAR IMAGING

Improved imaging devices and methods. A portable SPECT imaging device may co-register with imaging modalities such as ultrasound. Gamma camera panels including gamma camera sensors may be connected to a mechanical arm. A coded aperture mask may be placed in front of a gamma-ray photon sensor and used to construct a high-resolution three-dimensional map of radioisotope distributions inside a patient, which can be generated by scanning the patient from a reduced range of directions around the patient and with radiation sensors placed in close proximity to this patient. Increased imaging sensitivity and resolution is provided. The SPECT imaging device can be used to guide medical interventions, such as biopsies and ablation therapies, and can also be used to guide surgeries.

ZONE PLATE IMAGING SYSTEM

GAMMA-RAY IMAGING

A coded mask apparatus is provided for gamma rays. The apparatus uses nested masks, at least one of which rotates relative to the other.

IMAGING SYSTEM

SYSTEM AND METHOD FOR THE DETECTION OF ABNORMAL RADIATION EXPOSURES USING PULSED OPTICALLY STIMULATED LUMINESCENCE

This invention relates generally to luminescence techniques for imaging radiation fields and, more specifically, to the use of experimental and mathematical methods to distinguish between dynamic irradiation and static - or other abnormal radiation - exposure conditions for applications in personnel and environmental radiation dosimetry, or related fields. In more particular, the instant invention provides a rapid and reliable method of detecting abnormal dosimeter exposur e conditions over a wide dynamic range of radiation doses, while avoiding significant background interference and stimulation light leakage. Additionally, the preferred embodiment of the instant invention uses a pulsed and synchronized luminescence detection scheme. Further, this invention teaches a complete method and system for abnormal exposure detection - including the use of a luminescent thin powder layer, the use of a periodic radiation absorbing filter, the pulsed stimulation and synchronized luminescence detection scheme, and the method of analyzing and interpreting the recorded images. Finally, the system provides a means of mathematically characterizing an ima ge as containing either a normal or abnormal exposure.

СИСТЕМА ФОРМИРОВАНИЯ ИЗОБРАЖЕНИЙ С ИСПОЛЬЗОВАНИЕМ КОДИРОВАННОЙ АПЕРТУРЫ С КВАДРАТНОЙ АНТИСИММЕТРИЧНОЙ РАВНОМЕРНО ДУБЛИРОВАННОЙ МАТРИЦЕЙ

Anodes for improved detection of adjacent signals not collected

L'invention concerne un ensemble détecteur de rayonnement comprenant un détecteur à semi-conducteur, un collimateur, plusieurs anodes pixellisées et au moins un processeur. Le collimateur comporte des ouvertures définissant des pixels. Chaque anode pixellisée est configurée pour générer un signal primaire en réponse à la réception d'un photon et pour générer au moins un signal secondaire en réponse à la réception d'un photon par au moins une anode environnante. Chaque anode pixellisée inclut une première partie et une seconde partie situées dans des ouvertures différentes du collimateur. L'au moins un processeur est couplé de manière opérationnelle aux anodes pixellisées, et configuré pour acquérir un signal primaire provenant de l'une des anodes pixellisées ; acquérir au moins un signal secondaire provenant d'au moins une anode pixellisée voisine ; et déterminer un emplacement de réception du photon en utilisant le signal primaire et l'au moins un signal secondaire. Figure pour l’abrégé : ? A radiation detector assembly includes a semiconductor detector, a collimator, multiple pixelated anodes, and at least one processor. The collimator has apertures defining pixels. Each rasterized anode is configured to generate a primary signal in response to reception of a photon and to generate at least one secondary signal in response to reception of a photon by at least one surrounding anode. Each rasterized anode includes a first part and a second part located in different openings of the collimator. The at least one processor is operably coupled to the raster anodes, and configured to acquire a primary signal from one of the raster anodes; acquiring at least one secondary signal from at least one neighboring pixelated anode; and determining a reception location of the photon using the primary signal and the at least one secondary signal. Figure for the abstract:?

RADIOACTIVE PARTICLE ABSORBABLE RADIOGRAPHIC METHOD FOR SELECTIVE DETECTION OF CORONARY STENOSIS

DEVICE OF FORMATION Of IMAGES CODEES, IN PARTICULAR OF RADIOGRAPHIES STARTING FROM a NUCLEAR SOURCE

GAMMA RAY IMAGING SYSTEM

ВИЗУАЛИЗАЦИЯ ГАММА-ИЗЛУЧЕНИЯ

Изобретение относится к устройству кодирующей маски для гамма-излучения. Устройство содержит вложенные маски, по меньшей мере одна из которых вращается относительно другой. Устройство маски для использования при измерении поступающего излучения методом «сжатого измерения» содержит одну или более одной кодирующих масок, каждая маска имеет корпус, сформированный из материала, который снижает интенсивность поступающего излучения. Каждая маска из указанных одной или более одной масок имеет множество областей апертур маски, которые имеют более высокое пропускание излучения по сравнению с другими участками указанных одной или более масок, достаточное для восстановления результатов «сжатого измерения». Указанные одна или более одной кодирующих масок выполнены с возможностью вращаться. Причем в случае, если указанное устройство маски содержит более одной кодирующей маски, по меньшей мере одна из кодирующих масок выполнена с возможностью вращаться относительно других кодирующих масок. Техническим ...

ВИЗУАЛИЗАЦИЯ ГАММА-ИЗЛУЧЕНИЯ

Processing coded aperture image data by applying weightings to aperture functions and data frames

A method of processing data from a coded aperture imaging apparatus comprises taking plural data frames, each frame obtained using a different coded aperture array to image the same scene, taking plural aperture functions corresponding to the coded aperture arrays used, applying a weighting to each aperture function as well as to the respective data frame, and combining the weighted aperture functions into a combined aperture function as well as combining the weighted frames into a combined frame of data. Preferably, the sum of all weightings is zero, combining positive, negative, complex and higher dimensional weightings; the sum of modulus of the weightings may be one. A covariance matrix for the combined aperture function may be formed from trial points. Various methods are also disclosed for adjusting the image frames to account for motion relative to the scene, for example prior to combining the frames, and for identifying such motion.

Imaging system

RADIOGRAPHIC IMAGING SYSTEM FOR HIGH ENERGY RADIATION

... 1512442 Tomography RAYTHEON CO 14 April 1975 [1 May 1974] 38611/77 Divided out of 1512441 Heading H4D The disclosure is wholly contained in Specification 1,512,441, the claims however deal with the varying of the sizes of the apertures in the modulating means in the imaging system of Figs. 15-23 of that Specification (Figs. 1-9 of the present Specification).

Backscatter imaging using hadamard transform masking

EINRICHTUNG ZUR ABBILDUNG EINER RAUMLICH AUSGEDEHNTEN QUELLE EINER HOCHENERGETISCHEN STRAHLUNG

MECHANISM TO THE ILLUSTRATION RAUMLICH OF AN EXPANSION SOURCE OF A HIGH-ENERGY RADIATION

Apodised zone plate and nonlinear chirp signal

CODED APERTURE IMAGING METHOD AND SYSTEM

DEVICE Of HOLOGRAPHY FOR OBTAINING an IMAGE CODEE Of an OBJECT TRANSMITTING X-RADIATION OR G

Three-dimensional image reconstructing method for e.g. medical imagery, involves taking two-dimensional image of object by detectors, and obtaining three-dimensional image from two-dimensional image by probability reconstruction algorithm

Ce procédé de reconstruction d'images tridimensionnelles d'objets consiste à employer des scintillateurs (2, 4) sensibles, en combinaison à des masques codés épais et à grande fraction d'ouverture à un algorithme probabiliste de reconstruction de l'image, ce qui donne des résultats de bonne qualité même avec des particules fortement énergétiques mais de faible activité.

METHOD OF TREATING A SPECTRUM OF RADIATION MEASUREMENT BY A SENSOR

L'invention concerne un procédé de traitement de spectres en énergie d'un rayonnement transmis par un objet irradié par une source de rayonnements ionisants, en particulier un rayonnement X, pour des applications en imagerie médicale ou le contrôle non destructif. Le procédé met en œuvre un détecteur comportant une pluralité de pixels, chaque pixel étant apte à acquérir un spectre du rayonnement transmis par l'objet. Le procédé permet, à partir d'une pluralité de spectres détectés, d'établir un spectre, dit spectre de diffusion, représentatif d'un rayonnement diffusé par l'objet. Chaque spectre acquis est corrigé en prenant en compte le spectre de diffusion ainsi établi. L'invention permet de réduire l'influence de la diffusion, par l'objet, du spectre émis par la source. The invention relates to a method for the treatment of energy spectra of radiation transmitted by an object irradiated by a source of ionizing radiation, in particular X-ray radiation, for applications in medical imaging or non-destructive testing. The method implements a detector comprising a plurality of pixels, each pixel being able to acquire a spectrum of the radiation transmitted by the object. The method makes it possible, from a plurality of detected spectra, to establish a spectrum, called scattering spectrum, representative of a radiation scattered by the object. Each acquired spectrum is corrected by taking into account the diffusion spectrum thus established. The invention makes it possible to reduce the influence of the diffusion, by the object, of the spectrum emitted by the source.

DEVICE Of HOLOGRAPHY FOR OBTAINING an IMAGE CODEE Of an OBJECT TRANSMITTING X-RADIATION OR G

Procédé et dispositif pour évaluer la qualité et l'uniformité du rayonnement provenant d'un spot à rayons X sur l'anti-cathode d'un tube à rayons X.

La présente invention concerne un procédé et un dispositif pour évaluer la qualité et la surface du spot dans l'anti-cathode d'un tube à rayons X. Ce dispositif est caractérisé en ce qu'il comprend un moyen (11) pour positionner l'instrument d'une manière telle qu'un diamètre dans le plan de la surface du cristal en forme de disque coïncide avec la direction centrale du faisceau de rayons X, un moyen (13) pour maintenir le cristal (12) qui doit être examiné et pour l'enlever, un moyen (14) pour tourner le cristal en forme de disque autour d'un diamètre dans son propre plan de surface, perpendiculaire au diamètre mentionné ci-dessus, un moyen (15) pour tourner le cristal en forme de disque dans son propre plan afin de former l'angle azimutal correct, et un moyen (17) pour maintenir un film en place perpendiculaire à la direction du faisceau doublement réfléchi.

DETECTOR RECEIVING SET OF CORONARY STENOSES AND RADIOACTIVE PARTICLES UTILISEES IN THE PROCESS

CODED APERTURE IMAGING SYSTEM

This invention relates to coded aperture imaging apparatus and methods. In one aspect a coded aperture imager has at least one detector array and a reconfigurable coded aperture mask means. A reconfigurable coded aperture mask means can display various coded aperture masks to provide imaging across different fields of view and/or with different resolution without requiring any moving parts or bulky optical components. More than one detector array can be used to provide large area imaging without requiring seamless tiling and this represents another aspect of the invention. The present invention also relates to the use of coded aperture imaging in the visible, ultraviolet or infrared wavebands. The use of coded aperture imaging for imaging through a curved optical element is taught as the image decoding can automatically remove any aberrations introduced by the curved element. © KIPO & WIPO 2008 ...

Systems and methods for camera calibration

A method and system for calibrating a scintillation camera includes steps of constructing a pair of generic linearity coefficient (LC) matrices from a representative detector based on measurement of non-linearity; and transforming the pair of generic LC matrices according to measured pinhole locations from a lead mask to generate detector specific LC matrices.

Backscatter imaging using Hadamard transform masking

Backscatter imaging using Hadamard transform masking includes an area x-ray source with alternating, masked, Hadamard transform patterns. The total backscatter signal from a target for each pair of corresponding masks is recorded. The difference in signal strengths for each pair of corresponding masks is a direct measurement of the Hadamard transform coefficient for that mask. An image of the target is formed by performing an inverse discrete Hadamard transform on the complete matrix of coefficients.

CODED APERTURE MASKS FOR RADIATION-BASED MEDICAL IMAGING

放射線ベースの医学イメージング用のコード化されたアパーチャマスク

... 本発明は、診断核医学イメージングにおいて使用するためのコード化されたアパーチャマスクに関する。コード化されたアパーチャマスクは、診断核医学イメージングにおいて使用される放射線の型に対して高い減衰係数を有する材料におけるアパーチャまたはピンホールのパターンからなる。該マスク材料の厚さは75%未満の減衰パーセンテージ、好ましい形態において、約29%に等しい減衰パーセンテージを有する。コード化されたアパーチャマスクは、好ましい形態において、鉛減衰管も有し、検出器の単一画素と同じ領域を占める最小ホールの照射を有する。本発明は、放射線検出器として16ビットガンマカメラを使用する診断核医学イメージングシステムまで拡がる。 ...

X-ray computer tomographic equipment, has focus drift determined from adjacent blanked off scintillator detector elements voltages

An x-ray beam passes through an object in the z-direction towards an array of detector elements (5a-5d). The top half of a first element (5b) and the bottom half of an adjacent element (5c) located in the edge region of the array are provided with covers impervious to x-rays. Any deviation of the beam from the set z-direction can be derived from the voltages (UA,UB) of the first and second covered elements from the formula:- Deviation-Position = (UA-UB)/(UA+UB).

Verfahren und Vorrichtung zur Abbildung mit kodierter Blende

Coded aperture imaging

A coded aperture imaging (CAI) system incorporates a detector array 60 adjacent to a coded aperture mask 62 comprising a zone plate array. The mask 62 has light transmissive regions and opaque regions. The opaque regions are sufficiently absorbing that they prevent any significant radiation intensity being reflected at their interfaces and reaching the detector array 60 as detrimental background radiation. The coded aperture mask 62 is much thicker than a prior art equivalent, and radiation only passes through the mask 62 if it has an angle of incidence in a narrow range between rays 64. Consequently, the CAI system field of view is narrowed by making the mask 62 thicker; this causes the CAI system's point spread function (PSF) to have radiation intensity which reduces with change in angle of incidence away from the normal incidence direction and to reach a negligible level when truncated by a detector array edge. This allows optimal image reconstruction.

Gamma ray imaging

A gamma ray imager is described having an imager head assembly 2 comprising a coded aperture mask 4, a gamma ray shield 6 and an array 8 of detector elements. The imager head assembly is rotated during exposure to provide an extended field of view over the instantaneous field of view provided by the imager head assembly 2. The rotation of the imager head assembly 2 takes place about a vertical axis 22 through the coded aperture mask 4 and is driven by a stepper motor. ...

Radiation device or signal

Radiation detection system

Coded aperture imaging system

IMAGING SYSTEM

Gamma ray imaging system

Gamma-ray imaging

A coded mask apparatus is provided for gamma rays. The apparatus uses nested masks, at least one of which rotates relative to the other.

Coded aperture imaging system

Apparatus for inspecting objects using coded beam

An apparatus for inspecting objects utilizes a fan beam or flood beam to illuminate the inspected region of the object. A modulator, which may take the form of a movable mask, dynamically encodes the beam so that each segment of the inspected region receives varying amounts of radiation according to a predetermined temporal sequence. The resultant signal produced by a backscatter detector or optional transmission detector receiving radiation from the object is decoded to recover spatial information so that an image of the inspected region may be constructed.

Processing method for coded aperture sensor

System and method for the detection of abnormal radiation exposures using pulsed optically stimulated luminescence

APPARATUS FOR INSPECTING OBJECTS USING CODED BEAM

An apparatus for inspecting objects utilizes a fan beam or flood beam to illuminate the inspected region of the object. A modulator, which may take t he form of a movable mask, dynamically encodes the beam so that each segment of the inspected region receives varying amounts of radiation according to a predetermined temporal sequence. The resultant signal produced by a backsc atter detector or optional transmission detector receiving radiation from th e object is decoded to recover spatial information so that an image of the i nspected region may be constructed.

CODED IMAGING SYSTEMS

COED IMAGING SYSTEMS Abstract of the Disclosure A nuclear imaging system in which a substantially on-axis Fresnel zone plate positioned between a source of nuclear radia-tion in living tissue and a spatial detector is moved in a pre-determined time sequence in synchronism with motion of a bar pattern formed at the spatial detector output to improve suppres-sion of unwanted spatial frequency components and to facilitate production of an image of the nuclear source.

SQUARE ANTI-SYMMETRIC UNIFORMLY REDUNDANT ARRAY CODED APERTURE IMAGING SYSTEM

A square anti-symmetric uniformly redundant array coded aperture includes transparent and opaque cells and exhibits a normal mask pattern at a first position and a complementary mask pattern when rotated to a second position rotationally offset by 90~ from the first position. The coded aperture is used in a system for imaging a source of non-focusable radiation such as gamma rays or x-rays. The imaging system includes the coded aperture (22) for receiving the radiation (20) emitted by the source and generating coded shadows therefrom at the two positions, a rotating platform (24) and motor (30) for rotating the coded aperture between the two positions, a position sensitive detector (10) generating coded optical signals of the shadows sequentially impinging thereon, an optical signal converter (34) generating coded electrical signals of the optical signals, and a signal processor (14) decoding the electrical signals and generating an image signal of the source of non-focusable radiation.

METHOD FOR CORRECTING A SPECTRAL IMAGE

HIGH ENERGY SPATIALLY CODED IMAGE DETECTING SYSTEMS

METHOD OF FORMING AN IMAGE OF AN ORGAN OF A LIVING BODY CONTAINING RADIOACTIVE MATERIAL

PROCESS OF REBUILDING Of IMAGES OF SUCCESSIVE PARALLEL CUTS Of an OBJECT CONTAINING OF the TRANSMITTING SOURCES OF Gamma ray

Method for reconstructing images of successive section cuttings of an object (2) by means of a gamma-camera (5) having a plane detector (1) parallel to the section cutting planes. The method comprises the use of a mask (M) arranged between the object and the camera, forming a coding matrix comprising patterns (M1) formed by transparent elements in an opaque surface. The method comprises then the processing of signals provided by the gamma-camera, from a matrix for decoding the images of the sources on the detector, obtained by traversing the mask. The processing uses an iterative algorithm of signal processing. Application to the formation of tridimensional images of objects.

METHOD FOR RECONSTRUCTING IMAGES OF SUCCESSIVE PARALLEL SECTION CUTTINGS OF AN OBJECT CONTAINING GAMMA RADIATION EMITTING SOURCES

Method for reconstructing images of successive section cuttings of an object (2) by means of a gamma-camera (5) having a plane detector (1) parallel to the section cutting planes. The method comprises the use of a mask (M) arranged between the object and the camera, forming a coding matrix comprising patterns (M1) formed by transparent elements in an opaque surface. The method comprises then the processing of signals provided by the gamma-camera, from a matrix for decoding the images of the sources on the detector, obtained by traversing the mask. The processing uses an iterative algorithm of signal processing. Application to the formation of tridimensional images of objects.

Singer product apertures

A coded aperture mask is provided. The coded aperture mask may include a 2-D planar substrate having a plurality of holes constructed based on a Cartesian product of a first 1-D aperture set and a second 1-D aperture set. The first 1-D aperture set may have a first balanced decoder. The second 1-D aperture set may have a second balanced decoder. The Cartesian product may involve the first 1-D aperture set and the second 1-D aperture set arranged in a non-zero angle (e.g., 90 degrees) to each other. The first 1-D aperture set may define a first axis of the 2-D planar substrate. The second 1-D aperture set may define a second axis of the 2-D planar substrate. The plurality of holes on the 2-D planar substrate may correspond to holes in both of the first 1-D aperture set and the second 1-D aperture set.

Coded aperture imaging with uniformly redundant arrays

A system utilizing uniformly redundant arrays to image non-focusable radiation. The uniformly redundant array is used in conjunction with a balanced correlation technique to provide a system with no artifacts such that virtually limitless signal-to-noise ratio is obtained with high transmission characteristics. Additionally, the array is mosaicked to reduce required detector size over conventional array detectors.

SCATTERHOLE CAMERA AND METHOD FOR USING SAME INCLUDING THE STEP OF CONVOLUTING THE IMAGE

High intensity radiation imaging system

A nuclear imaging system for mapping a spatially distributed source of high energy nuclear particles from a living organ which has selectively absorbed a radioactive compound in which the nuclear energy is spatially coded by a zone plate positioned between the source and a spatial detector, and a half tone screen is positioned between the source and the zone plate to increase the definition of the image.

CT Scanner with anode scan monitor

In a variant of the type of radiographic apparatus known as CT scanners a scanning X-ray tube is used to provide a planar fan-shaped distribution and to scan the distribution in its plane. Means are also provided to rotate the system about an axis perpendicular to the plane. In order to properly relate operation of the system, it is desirable to monitor the progress of the tube scan. This invention disposes a detector into the radiation and a pair of gratings acting together to modulate the radiation, incident on the detector, in relation to the scan position. The detector output is processed to give pulses which can be used to regulate the tube scan.

УСТРОЙСТВО, ОГРАНИЧИВАЮЩЕЕ ПОЯВЛЕНИЕ ОБНАРУЖЕННЫХ ЛОЖНЫХ ИЗОБРАЖЕНИЙ ДЛЯ ГАММА-КАМЕРЫ С КОДИРУЮЩЕЙ МАСКОЙ

FIELD: physics; image processing. ^ SUBSTANCE: invention relates to devices which limit appearance of detected false images arising when using a gamma camera with a coding mask, used in places where gamma-ray sources are located. The invention is a device which limits appearance of detected false images for a gamma camera with a coding mask (1), which has a gamma-ray detector (3) lying opposite the coding mask and having a field of view which includes the partial coding area (20) of the coding mask. The device has a concealed part (30) which is not transparent to gamma-rays and lies opposite the detector (3) relative the coding mask (1). The said concealed part (30) covers the partial coding area (20) of the field of view of the detector (3). ^ EFFECT: suppression of detected false images, simple manufacture. ^ 10 cl, 7 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) 2 383 903 (13) C2 (51) МПК G01T 1/29 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ, ПАТЕНТАМ И ТОВАРНЫМ ЗНАКАМ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21), (22) Заявка: 2007142441/28, 14.04.2006 (24) Дата начала отсчета срока действия патента: 14.04.2006 (73) Патентообладатель(и): КОММИССАРИАТ А Л′ ЭНЕРЖИ АТОМИК (FR) (43) Дата публикации заявки: 27.05.2009 2 3 8 3 9 0 3 (45) Опубликовано: 10.03.2010 Бюл. № 7 (56) Список документов, цитированных в отчете о поиске: WO 91/18357 A1, 28.11.1991. US 6195412 В1, 27.02.2001. US 5936246 A, 10.08.1999. SU 451972 A1, 30.11.1974. 2 3 8 3 9 0 3 R U (86) Заявка PCT: FR 2006/050350 (14.04.2006) C 2 C 2 (85) Дата перевода заявки PCT на национальную фазу: 19.11.2007 (87) Публикация PCT: WO 2006/111678 (26.10.2006) Адрес для переписки: 103735, Москва, ул. Ильинка, 5/2, ООО "Союзпатент", пат.пов. Ю.В.Пинчуку, рег.№ 656 (54) УСТРОЙСТВО, ОГРАНИЧИВАЮЩЕЕ ПОЯВЛЕНИЕ ОБНАРУЖЕННЫХ ЛОЖНЫХ ИЗОБРАЖЕНИЙ ДЛЯ ГАММА-КАМЕРЫ С КОДИРУЮЩЕЙ МАСКОЙ (57) Реферат: Изобретение относится к устройствам, ограничивающим появление обнаруженных ложных изображений, возникающих при использовании ...

СПОСОБ И СИСТЕМА ПОЛУЧЕНИЯ ИЗОБРАЖЕНИЯ НА ОСНОВЕ СЖАТОГО СЧИТЫВАНИЯ

Lochmaske für einen Röntgenstrahlendetektor, Computertomograpiegerät, aufweisend eine Lochmaske und Verfahren zur Justierung einer Lochmaske

Die Erfindung betrifft eine Lochmaske (20, 30, 40, 50, 70) für einen Detektorelemente (6, 6.1 bis 6.19) umfassenden Röntgenstrahlendetektor (5), welche vorzugsweise für ein Computertomographiegerät (1) vorgesehen ist. Die Lochmaske weist eine Maskenplatte (18) mit Löchern (19) auf, von denen jedes einem Detektorelement (6) zugeordnet ist, wobei wenigstens ein Justageloch (22 bis 29, 41 bis 44, 51 bis 54, 81 bis 86) der Maskenplatte (18) derart vergrößerte Abmessungen aufweist, dass es an die Abmessungen wenigstens zweier Detektorelemente (6.1 bis 6.19) angepasst ist. Das Justageloch dient zur Justierung der Lochmaske über dem Röntgenstrahlendetektor (5). Unter Verwendung von Röntgenstrahlung werden Messsignale der Detektorelemente (6.1 bis 6.19) ermittelt, die dem wenigstens einen Justageloch zugeordnet sind. Basierend auf einem Vergleich der Messsignale der Detektorelemente werden die Lochmaske und der Röntgenstrahlendetektor (5) relativ zueinander justiert. The invention relates to a shadow mask (20, 30, 40, 50, 70) for a detector elements (6, 6.1 to 6.19) comprising X-ray detector (5), which is preferably provided for a computed tomography device (1). The shadow mask has a mask plate (18) with holes (19), each of which is associated with a detector element (6), wherein at least one Justageloch (22 to 29, 41 to 44, 51 to 54, 81 to 86) of the mask plate ( 18) has such enlarged dimensions that it is adapted to the dimensions of at least two detector elements (6.1 to 6.19). The adjustment hole is used to adjust the shadow mask over the X-ray detector (5). Using X-radiation, measurement signals of the detector elements (6.1 to 6.19) are determined, which are assigned to the at least one adjustment hole. Based on a comparison of the measurement signals of the detector elements, the shadow mask and the X-ray detector (5) are adjusted relative to each other.

Imaging system having plural distinct coded aperture arrays at different mask locations

In a coded aperture imaging system (Figure 1), a detector array (8) receives radiation from a scene (4) via a coded aperture mask (6). The coded aperture mask provides plural distinct (uncorrelated) coded aperture arrays at different mask positions - see Figure 5. Each mask array region passes coded intensity patterns to the detector array, and these can be decoded separately for each distinct array area to reconstruct separate images associated with each separate coded array; this allows a single detector to image different fields of view (FOV) - see Figure 2 - of different sizes and resolutions. The coded aperture mask may be curved (Figure 4) and have array regions of different sizes, resolutions and positions. The coded mask may be reconfigurable, periodically changing (Figure 3).

Particle beam sensor

A particle beam sensor provides an oblique surface in the path of the beam 3 to scatter some of the particles towards a sensor 8 while allowing the rest of the beam to pass through. The scattered particles are sensed to enable measurements of the position, direction, etc of the beam to be performed in order to allow control of the process or task for which the beam 3 is used. The particle beam sensor 1 comprises: scattering means providing a surface 2 for intercepting obliquely a path of a particle beam 3 thereby to permit a scattering of particles from the particle beam by the scattering means 2; sensor means 8 responsive to receipt of one or more said scattered particles to generate a sensor signal; aperture mask means 6 arranged between the scattering means and the sensor means to present to the scattering means a screen opaque to said scattered particles and having at least one aperture 7 through which an unobstructed view of the scattering means is provided to the sensor means, the ...

Coded aperture imaging system

APPARATUS AND METHOD FOR CAPTURING STILL IMAGES AND VIDEO USING DIFFRACTION CODED IMAGING TECHNIQUES

An apparatus and method are described for capturing images in visible light as well as other radiation wavelengths. In one embodiment, the apparatus comprises: a diffraction coded imaging system including a plurality of apertures arranged in a diffraction coded array pattern with opaque material blocking array elements not containing apertures; and a light- or radiation-sensitive sensor coupled to the diffraction coded imaging system array and positioned at a specified distance behind the diffraction coded imaging system array, the radiation-sensitive sensor configured to sense light or radiation transmitted and diffracted through the apertures in the diffraction coded imaging system array. 1. An apparatus for precompensating for the effects of diffraction and wave-optical interference comprising:a sensor;a physical aperture pattern constructed to emulate a result of a desired aperture pattern if the desired aperture pattern did not produce wave-optical interference and diffraction effects,the physical aperture pattern to receive radiation from a scene and precompensate for the wave-optical interference and diffraction effects of the desired aperture pattern, taking advantage of wave-optical interference and diffraction effects of the physical aperture pattern to project a radiation pattern, the radiation pattern projected in a desired overlapping pattern that would have resulted if the physical aperture pattern had the desired aperture pattern but without the wave-optical interference and diffraction effects.2. The apparatus as in wherein the physical aperture pattern is used for more than one frame.3. The apparatus as in wherein the subject is at varying distances from the physical aperture pattern.4. The apparatus as in wherein the radiation includes visible light wavelengths.5. The apparatus as in wherein the radiation includes infrared wavelengths.6. The apparatus as in wherein the radiation includes ultraviolet wavelengths.7. The apparatus as in wherein the ...

Methods and systems for high performance and versatile molecular imaging

Improved imaging devices and methods. A portable SPECT imaging device may co-register with imaging modalities such as ultrasound. Gamma camera panels including gamma camera sensors may be connected to a mechanical arm. A coded aperture mask may be placed in front of a gamma-ray photon sensor and used to construct a high-resolution three-dimensional map of radioisotope distributions inside a patient, which can be generated by scanning the patient from a reduced range of directions around the patient and with radiation sensors placed in close proximity to this patient. Increased imaging sensitivity and resolution is provided. The SPECT imaging device can be used to guide medical interventions, such as biopsies and ablation therapies, and can also be used to guide surgeries.

SYSTEM AND METHOD FOR USE IN IMAGING

An imaging system is described, the system comprises a radiation source unit comprising one or more emitters for emitting electromagnetic radiation of a selected frequency range toward a general direction of propagation; a detection unit comprising one or more detector arrays located along path of electromagnetic radiation emitted from the radiation source unit; an aperture mask unit located in optical path of radiation propagation from the radiation source unit toward the detection unit, providing minimization factor M with respect to a selected location of a sample to be imaged. The aperture mask unit comprises a set of aperture masks, each carrying a pinhole array comprising predetermined number pinholes with selected arrangement. The pinholes of the set of aperture masks are shifted with respect to alignment of the detector cells by fractions of the minimization factor to generate shifted image replications, shifted by fractions of the geometrical resolution. 1. An imaging system comprising:a radiation source unit comprises one or more emitters configured for emitting electromagnetic radiation of a selected frequency range toward a general direction of propagation;a detection unit comprises one or more detector arrays having selected geometrical resolution and located along path of electromagnetic radiation emitted from said radiation source unit;an aperture mask unit located in optical path of radiation propagation from said radiation source unit toward said detection unit to provide minimization factor M with respect to a selected location of a sample to be imaged, said aperture mask unit comprising a set of aperture masks, each carrying a pinhole array comprising predetermined number pinholes with selected arrangement;wherein pinholes of said set of aperture masks are shifted with respect to alignment of detector cells of said detection unit by fractions of said minimization factor to thereby generate on said detection unit shifted image replications, being ...

SINGER PRODUCT APERTURES

A coded aperture mask is provided. The coded aperture mask may include a 2-D planar substrate having a plurality of holes constructed based on a Cartesian product of a first 1-D aperture set and a second 1-D aperture set. The first 1-D aperture set may have a first balanced decoder. The second 1-D aperture set may have a second balanced decoder. The Cartesian product may involve the first 1-D aperture set and the second 1-D aperture set arranged in a non-zero angle (e.g., 90 degrees) to each other. The first 1-D aperture set may define a first axis of the 2-D planar substrate. The second 1-D aperture set may define a second axis of the 2-D planar substrate. The plurality of holes on the 2-D planar substrate may correspond to holes in both of the first 1-D aperture set and the second 1-D aperture set. 1. A coded aperture mask comprising:a 2-dimensional planar substrate having a plurality of holes constructed based on a Cartesian product of a first 1-dimensional aperture set and a second 1-dimensional aperture set,wherein the first 1-dimensional aperture set has a first balanced decoder,wherein the second 1-dimensional aperture set has a second balanced decoder,wherein the Cartesian product involves the first 1-dimensional aperture set and the second 1-dimensional aperture set arranged in a non-zero angle to each other, the first 1-dimensional aperture set defining a first axis of the 2-dimensional planar substrate, the second 1-dimensional aperture set defining a second axis of the 2-dimensional planar substrate, wherein the plurality of holes correspond to holes in both of the first 1-dimensional aperture set and the second 1-dimensional aperture set.2. The coded aperture mask of claim 1 , wherein a first cyclic correlation between the first balanced decoder and the first 1-dimensional aperture set has identically zero sidelobes claim 1 , wherein a second cyclic correlation between the second balanced decoder and the second 1-dimensional aperture set has identically ...

CODED-MASK-BASED X-RAY PHASE-CONTRAST AND DARK-FIELD IMAGING

Phase contrast and dark-field X-ray imaging enable imaging of objects that absorb or reflect very little X-ray light. Disclosed is a method and systems for performing coded-mask-based multi-contrast imaging (CMMI). The method includes providing radiation to a coded mask that has a known phase and absorption profile according to a pre-determined pattern. The radiation is then impingent upon a sample, and the radiation is detected to perform phase-reconstruction and image processing. The method and associated systems allow for the use of maximum-likelihood and machine learning methods for reconstruction images of the sample from the detected radiation. 1. An imaging system comprising:a radiation source disposed along an optical axis, the radiation source configured to generate radiation that propagates along the optical axis, and wherein the radiation has an intensity profile and a phase profile;a coded mask disposed along the optical axis such that the radiation impinges upon the coded mask, the coded mask configured to alter the phase profile of the radiation according to a pre-determined phase mapping of the coded mask; anda detector system disposed along the optical axis configured to receive the radiation from the coded mask, and further configured to generate an electrical signal indicative of the received radiation.2. An imaging system according to claim 1 , wherein the radiation comprises X-ray radiation.3. An imaging system according to claim 1 , wherein the intensity and phase profiles of the radiation comprise predetermined intensity and phase profiles.4. An imaging system according to claim 1 , wherein the coded mask comprises a binary coded mask.5. An imaging system according to claim 1 , wherein the coded mask comprises a plurality of pixels.6. An imaging system according to claim 5 , wherein the plurality of pixels comprises pixels having transverse spatial dimensions of 0.1 to 50 micrometers.7. An imaging system according to claim 1 , wherein the coded ...

IMAGING SYSTEM WITH ONE OR MORE MASK UNITS AND CORRESPONDING METHOD OF RECORDING RADIATION

An imaging system includes a first mask unit having a hollow cavity surrounding a rotational axis. The first mask unit is characterized by a first pattern encoded on its surface. The first pattern defines a height along an axial direction and includes a respective plurality of elements with at least one open element and at least one blocking element in each of the axial direction and the circumferential direction. A detector is configured to receive radiation data from at least one source such that one of the detector and the source is located inside the hollow cavity and another is located outside the hollow cavity. The first mask unit is configured to move relative to the rotational axis in at least one of the axial and circumferential direction until the first pattern is recorded in 360 degrees. A second mask unit may be positioned around the first mask unit. 1. An imaging system comprising:a first mask unit having a surface and a hollow cavity surrounding a rotational axis;wherein the first mask unit is characterized by a first pattern encoded on the surface, the first pattern defining a height along an axial direction parallel to the rotational axis;wherein the first pattern includes a respective plurality of elements with one or more open elements in each of the axial direction and a circumferential direction and one or more blocking elements in each of the axial direction and the circumferential direction;a detector configured to receive radiation data from at least one source such that one of the detector and the at least one source is located inside the hollow cavity and another of the detector and the at least one source is located outside the hollow cavity;wherein the first pattern includes a first set and a second set, the first pattern being characterized by a base set such that the first set and the second set each include a respective portion of the base set; andwherein the first mask unit is configured to move relative to the rotational axis in both ...

COMPUTERIZED TOMOGRAPHY SYSTEM

An imager unit and computerized tomography system are disclosed. The imager unit comprises a radiation source unit comprising at least one radiation source emitting selected radiation and configured to provide diffused radiation with general direction of propagation, and an image collection unit comprising aperture unit and detector array located downstream of the aperture unit with respect to said general direction of propagation. The aperture unit comprises a set of two or more aperture arrays each aperture array having a predetermined arrangement of apertures. The aperture unit is configured for utilizing said set of aperture arrays for collecting the radiation during corresponding collection time periods. 1. An imager unit comprising: radiation source unit comprising at least one radiation source emitting selected radiation and configured to provide diffused radiation with general direction of propagation , image collection unit comprising aperture unit and detector array located downstream of the aperture unit with respect to said general direction of propagation; the aperture unit comprises a set of two or more aperture arrays each aperture array having a predetermined arrangement of apertures , said aperture unit being configured for utilizing said set of aperture arrays for collecting the radiation during corresponding collection time periods.2. The imager unit of claim 1 , further comprising selected object mount located between said radiation source and said image collection unit and configured for identifying suitable location for an object to be monitored.3. The imager unit of claim 1 , configured to be mounted on a rotatable arm for imaging an object from a selected set of angular directions.4. The imager unit of claim 1 , wherein the radiation source is an ultra-sound source providing diffused ultra-sonic radiation.5. The imager unit of claim 1 , wherein the radiation source emits X-ray claim 1 , Gamma or ultra-violet radiation.6. The imager unit of ...

IMAGING SYSTEM WITH ONE OR MORE MASK UNITS AND CORRESPONDING METHOD OF RECORDING RADIATION

An imaging system includes a first mask unit having a hollow cavity surrounding a rotational axis. The first mask unit is characterized by a first pattern encoded on its surface. The first pattern defines a height along an axial direction and includes a respective plurality of elements with at least one open element and at least one blocking element in each of the axial direction and the circumferential direction. A detector is configured to receive radiation data from at least one source such that one of the detector and the source is located inside the hollow cavity and another is located outside the hollow cavity. The first mask unit is configured to move relative to the rotational axis in at least one of the axial and circumferential direction until the first pattern is recorded in 360 degrees. A second mask unit may be positioned around the first mask unit. 1. An imaging system comprising:a first mask unit having a surface and a hollow cavity surrounding a rotational axis;wherein the first mask unit is characterized by a first pattern encoded on the surface, the first pattern defining a height along an axial direction parallel to the rotational axis;wherein the first pattern includes a respective plurality of elements with at least one open element in each of the axial direction and a circumferential direction and at least one blocking element in each of the axial direction and the circumferential direction;a detector configured to receive radiation data from at least one source such that one of the detector and the at least one source is located inside the hollow cavity and another of the detector and the at least one source is located outside the hollow cavity; andwherein the first mask unit is configured to move relative to the rotational axis in at least one of the axial direction and the circumferential direction until the first pattern is at least partially recorded by the detector.2. The imaging system of claim 1 , wherein:the first mask unit is ...

Gamma-Ray Imaging

A coded mask apparatus is provided for gamma rays. The apparatus uses nested masks, at least one of which rotates relative to the other. 1. A coded mask for use in compressed sensing measurements of incoming radiation , the mask comprising:a mask pattern comprising a plurality of open mask elements and a plurality of closed mask elements;wherein the closed mask elements are of at least one material that modulates the intensity of the incoming radiation; andthe open mask elements allow a higher transmission of the radiation relative to the closed mask elements, the higher transmission being sufficient to allow reconstruction of an image from the compressed sensing measurements;wherein the mask is configured to, in use, mask a radiation sensor at a location within or behind the mask;the open mask elements are defined by mask apertures oriented towards the location of the sensor; andin the case where the mask is a sphere, a part of a sphere, a segment of a sphere or a segment of a sphere between two planes, and the location of the sensor is at the center of the sphere, the apertures are tapered and are defined by one or more surfaces aligned with a direction of the sensor.2. The coded mask of claim 1 , wherein the mask is flat claim 1 , rectangular claim 1 , circular claim 1 , arcuate or cylindrical claim 1 , or is ellipsoid claim 1 , cone claim 1 , cuboid or hexagonal shaped claim 1 , and the apertures are tapered and are defined by one or more surfaces aligned with the direction of the sensor.3. The coded mask of claim 1 , wherein the apertures are trapezoidal or conical.4. The coded mask of claim 1 , wherein:a) the mask has a horizontal field of view of 360°; orb) the mask is hemispherical and has a field of view of 2π; orc) the mask is spherical and has a field of view of nearly 4π; ord) the mask further comprises a radiation shield formed of a shield material that modulates the intensity of the incoming radiation, the radiation shield having an opening that limits ...

COMPRESSIVE IMAGING METHOD AND SYSTEM

A mask for use in compressed sensing of incoming radiation, the mask comprising: a body formed of a material that modulates an intensity of incoming radiation of interest. The body has a plurality of mask aperture regions, each comprising at least one mask aperture that allows a higher transmission of the radiation relative to other portions of the respective mask aperture region, the relative transmission being sufficient to allow reconstruction of the compressed sensing measurements; the mask has one or more axes of rotational symmetry with respect to the mask aperture regions; the mask apertures have a shape that provides symmetry after a rotation about the one or more axes of rotational symmetry; and mutual coherence of a sensing matrix generated by the rotation of the respective mask aperture regions is less than one. An imaging system for compressed sensing of incoming radiation comprising such a mask is also provided. 1. A mask for use in compressed sensing of incoming radiation , comprising:a body formed of a material that modulates an intensity of incoming radiation of interest; andwherein the body has a plurality of mask aperture regions, each comprising at least one mask aperture that allows a higher transmission of the radiation relative to other portions of the respective mask aperture region, the relative transmission being sufficient to allow reconstruction of the compressed sensing measurements;the mask has one or more axes of rotational symmetry with respect to the mask aperture regions;the mask apertures have a shape that provides symmetry after a rotation about the one or more axes of rotational symmetry; andmutual coherence of a sensing matrix generated by the rotation of the respective mask aperture regions is less than one.4. A mask as claimed in claim 1 , wherein the mutual coherence of the mask apertures is a minimized mutual coherence.5. A mask as claimed in wherein the mask is (i) a cubic or other Platonic solid claim 1 , or (ii) a ...

COLLIMATOR MODULE, MEDICAL APPARATUS, AND METHOD OF MAKING COLLIMATOR MODULE

To provide a technique with which it is possible to make collimator plates resistant to deformation, and reduce position offsets in the collimator plates, a collimator module () comprises a plurality of collimator plate sets () lined up side by side in a channel direction (CH), wherein each collimator plate set () comprises a first collimator plate (), a second collimator plate (), and a joint layer () disposed between the first collimator plate () and second collimator plate () for adhesively bonding the first collimator plate () and second collimator plate () together, and the plurality of collimator plate sets () are lined up side by side in the channel direction (CH) with an air layer () intervening between adjacent two of the plurality of collimator plate sets (). 112. A collimator module () comprising a plurality of collimator plate sets () lined up side by side in a specific direction (CH) , wherein{'b': '2', 'claim-text': [{'b': '3', 'a first collimator plate ();'}, {'b': '4', 'a second collimator plate (); and'}, {'b': 5', '3', '4', '3', '4, 'a joint layer () disposed between said first collimator plate () and said second collimator plate () for joining said first collimator plate () and said second collimator plate () together, and'}], 'each collimator plate set () comprises{'b': 2', '20', '2, 'said plurality of collimator plate sets () are lined up side by side in said specific direction (CH) with an air layer () intervening between adjacent two of said plurality of collimator plate sets ().'}21. The collimator module () as recited in claim 1 , wherein:{'b': 1', '542', '24', '3, 'said collimator module () is disposed on a side of radiation entrance of a detector () having a plurality of detector elements () lined up side by side in said specific direction (CH) at first intervals (P) for detecting the radiation, and'}{'b': 2', '4', '4', '3, 'said plurality of collimator plate sets () are aligned to line up side by side in said specific direction (CH) at ...

IMAGE SENSORS HAVING RADIATION DETECTORS AND MASKS

Disclosed herein is an image sensor comprising: a plurality of radiation detectors; a mask with a plurality of radiation transmitting zones and a radiation blocking zone; and an actuator configured to move the plurality of radiation detectors from a first position to a second position and to move the mask from a third position to a fourth position; wherein while the radiation detectors are at the first position and the mask is at the third position and while the radiation detectors are at the second position and the mask is at the fourth position, the radiation blocking zone blocks radiation from a radiation source that would otherwise incident on a dead zone of the image sensor and the radiation transmitting zones allow at least a portion of radiation from the radiation source that would incident on active areas of the image sensor to pass through. 1. An image sensor comprising:a plurality of radiation detectors;a mask with a plurality of radiation transmitting zones and a radiation blocking zone; andan actuator configured to move the plurality of radiation detectors from a first position to a second position and to move the mask from a third position to a fourth position;wherein while the radiation detectors are at the first position and the mask is at the third position and while the radiation detectors are at the second position and the mask is at the fourth position, the radiation blocking zone blocks radiation from a radiation source that would otherwise incident on a dead zone of the image sensor and the radiation transmitting zones allow at least a portion of radiation from the radiation source that would incident on active areas of the image sensor to pass through.2. The image sensor of claim 1 , wherein the image sensor is configured to capture claim 1 , by using the radiation detectors claim 1 , an image of a first portion of a scene when the radiation detectors are at the first position and the image sensor is configure to capture claim 1 , by using the ...

SYSTEMS AND METHODS FOR TISSUE DISCRIMINATION VIA MULTI-MODALITY CODED APERTURE X-RAY IMAGING

Systems and methods for tissue discrimination are disclosed. The systems and methods utilize coded x-ray beams. Transmission signals and scatter signals are utilized to determine tissue properties. 1. A system comprising:an x-ray source that, in use, produces an x-ray energy;a first coded aperture positioned to receive the x-ray energy, the first coded aperture, in use, produces at least two coded x-ray beams from the x-ray energy;a sample mount having a sample location positioned to allow the at least two coded x-ray beams to pass through the sample location, the sample mount configured to retain a sample at the sample location;a second coded aperture positioned to receive the at least two coded x-ray beams, the second coded aperture, in use, isolates transmission signals and scatter signals from each of the at least two coded x-ray beams;an x-ray detector array comprising a plurality of x-ray detector pixels, the plurality of x-ray detector pixels positioned to receive the transmission signals and the scatter signals;a processor in direct or indirect electronic communication with the x-ray source, the first coded aperture, the second coded aperture, and the x-ray detector array; anda memory having stored thereon a tissue identification algorithm and instructions that, when executed by the processor, cause the processor to: direct the x-ray source to emit the x-ray energy; direct the first coded aperture to produce the at least two coded x-ray beams from the x-ray energy; record a relative position of the sample location; direct the second coded aperture and the x-ray detector array to acquire transmission data and diffraction data for each of the at least two coded x-ray beams; determine one or more properties of a tissue sample positioned within the sample location of the sample mount using the tissue identification algorithm and the transmission data and/or the diffraction data; and generate a report including the relative position of the sample location and the ...

CAMERA DEVICE AND METHOD FOR SHOOTING LIGHT HAVING AT LEAST TWO WAVELENGTH BANDS

Camera device and method for shooting light having at least two wavelength bands are disclosed. The camera device includes a first camera containing a first lens for receiving light having a first wavelength band; a second camera including a second lens for receiving light having a second wavelength band which is different from the first wavelength band, the second lens being disposed facing the first lens of the first camera; and a parabolic mirror set between the first camera and the second camera, able to let the light having the first wavelength band penetrate therethrough, and at the same time, reflect the light having the second wavelength band. The first camera is a non-fisheye camera. The first lens is a non-fisheye lens. The second camera and the parabolic mirror form a catadioptric camera. The aperture stop of the non-fisheye lens coincides with the focal point of the parabolic mirror. 1. A camera device comprising:a first camera containing a first lens for receiving light having a first wavelength band;a second camera including a second lens for receiving light having a second wavelength band different from the first wavelength band, the second lens being disposed facing the first lens of the first camera; anda parabolic mirror set between the first lens and the second lens, able to let the light having the first wavelength band penetrate therethrough, and at the same time, reflect the light having the second wavelength band,wherein, the first camera is a non-fisheye camera; the first lens of the first camera is a non-fisheye lens; the second camera and the parabolic mirror form a catadioptric camera; and an aperture stop of the non-fisheye lens coincides with a focal point of the parabolic mirror.3. The camera device according to claim 1 , further comprising:a light barrier provided on a central part of a front surface of the parabolic mirror for shading a part of a curved surface of the parabolic mirror from light, so that the light cannot be reflected ...

METHOD FOR CORRECTING A SPECTRAL IMAGE

The invention concerns a method for processing energy spectra of radiation transmitted by an object irradiated by an ionising radiation source, in particular X-ray radiation, for medical imaging or non-destructive testing applications. The method uses a detector comprising a plurality of pixels, each pixel being capable of acquiring a spectrum of the radiation transmitted by the object. The method makes it possible, based on a plurality of detected spectra, to estimate a spectrum, referred to as the scattering spectrum, representative of radiation scattered by the object. The estimation involves taking into account a spatial model of the scattering spectrum. Each acquired spectrum is corrected taking into account the estimated scattering spectrum. The invention makes it possible to reduce the influence of the scattering, by the object, of the spectrum emitted by the source. 113-. (canceled)14: A method for correcting a spectral image formed by ionizing electromagnetic radiation transmitted by an object , the object being placed between a radiation source and a detector , the radiation source being configured to emit incident ionizing electromagnetic radiation toward the object;the detector comprising pixels, each pixel being configured to detect radiation transmitted by the object to the detector, and to measure a spectrum thereof, the transmitted radiation comprising scattered radiation caused by scattering of the incident radiation in the object and primary radiation; anda mask being interposed between the source and the object, the mask comprising absorbent elements configured to attenuate one portion of the incident radiation, the projection of each absorbent element onto the detector forming one shadow region, such that the detector comprises a plurality of shadow regions that are spaced apart from one another, each shadow region comprising at least one pixel;the method comprising:a) irradiating the object and measuring, using the pixels of the detector, an ...

METHOD AND DEVICE FOR CHARACTERIZING AN ELECTRON BEAM

A device for detecting X-rays radiated out of a substrate surface, said device comprising at least one X-ray detector, a resolver grating and a modulator grating, said resolver grating with at least one opening facing towards said X-ray detector is arranged in front of said X-ray detector. Said modulator grating is provided between said resolver grating and said substrate at a predetermined distance from said resolver grating and said substrate, where said modulator grating having a plurality of openings in at least a first direction, wherein said x-rays from said surface is spatially modulated with said modulator grating and resolver grating. 1. A device for detecting X-rays emanating from a substrate surface , said device comprising:at least one first X-ray detector;a patterned aperture resolver; anda patterned aperture modulator, said patterned aperture resolver includes at least one opening facing towards said X-ray detector and is positioned in front of said X-ray detector;', 'said patterned aperture modulator is positioned between said patterned aperture resolver and said substrate at a predetermined distance from said patterned aperture resolver and said substrate, where said patterned aperture modulator has a plurality of openings in at least a first direction; and', 'said x-rays emanating from said substrate surface are intensity modulated with said patterned aperture modulator and patterned aperture resolver before being detected by said X-ray detector., 'wherein2. The device according to claim 1 , wherein said openings in at least one of said patterned aperture modulator or said patterned aperture resolver are arranged in at least one of a 1-dimensional pattern or a 2-dimensional pattern.3. The device according to claim 2 , wherein said 1-dimensional or 2-dimensional patterns are at least one of periodic or non-periodic.4. The device according to claim 2 , wherein:an opening at a first position of at least one of said patterned aperture modulator or said ...

METHOD FOR VERIFYING CHARACTERISTICS OF AN ELECTRON BEAM

A method is provided for forming a three-dimensional article through successive fusion of parts of a powder bed. The method includes the steps of: applying a first powder layer on a work table; directing an electron beam from an electron beam source over the work table, the directing of the electron beam causing the first powder layer to fuse in first selected locations according to a pre-determined model, so as to form a first part of a cross section of the three dimensional article, and intensity modulating X-rays from the powder layer or from a clean work table with a patterned aperture modulator and a patterned aperture resolver, wherein a verification of at least one of a size, position, scan speed, or shape of the electron beam is achieved by comparing detected intensity modulated X-ray signals with saved reference values. 1. A method for forming a three-dimensional article through successive fusion of parts of a powder bed , which parts correspond to successive cross sections of the 3-dimensional article , said method comprising the steps of:providing a model of said 3-dimensional article;applying a first powder layer on a work table;directing an electron beam from an electron beam source over said work table, said directing of said electron beam causing said first powder layer to fuse in first selected locations according to said model, so as to form a first part of a cross section of said three dimensional article, andintensity modulating X-rays from said powder layer or from a clean work table with a patterned aperture modulator and a patterned aperture resolver, wherein a verification of at least one of a size, position, scan speed, or shape of the electron beam is achieved by comparing detected intensity modulated X-ray signals with saved reference values.2. The method according to claim 1 , wherein:said step of providing said model comprises storing said model within one or more memory storage areas; andone or more of said applying, directing, and ...

Gamma-Ray Imaging

A coded mask apparatus is provided for gamma rays. The apparatus uses nested masks, at least one of which rotates relative to the other. 1. A mask apparatus for use in compressed sensing of incoming radiation , comprising:one or more nested coded masks, each of the masks having a body being formed from a material that modulates the intensity of the incoming radiation;wherein each of the one or more masks has a plurality of mask aperture regions, that that allow a higher transmission of the radiation relative to other portions of the one or more coded masks, the higher transmission being sufficient to allow reconstruction of compressed sensing measurements.2. The mask apparatus of claim 1 , wherein:the one or more masks are cylindrical.3. The mask apparatus of claim 1 , wherein:each of the one or more masks has a top and a bottom, and the mask apparatus further comprises a radiation shield that modulates the intensity of the incoming radiation and that covers the top and bottom of the masks.4. The mask apparatus of claim 1 , wherein:each of the one or more masks are hemispherical, segments of spheres, or spherical.5. The mask apparatus of claim 1 , wherein:the plurality of mask aperture regions of each of the one or more masks are equal in number to a power of two.6. The mask apparatus of claim 1 , wherein:each of the one or more masks is formed from a material selected from the group consisting of: tungsten, lead, gold, tantalum, hafnium and their alloys.7. The mask apparatus of claim 1 , whereineach of the one or more masks is formed:i) from a material that modulates incoming gamma-ray radiation;ii) from a material that modulates incoming optical or infrared radiation;iii) formed from a material that modulates incoming neutron radiation; oriv) from a material that modulates both incoming gamma-ray radiation and neutrons.8. The mask apparatus of claim 7 , wherein:some of the mask aperture regions are modulating regions for gamma-rays and some of the mask aperture ...

System and method for imaging with pinhole arrays

An imaging system is provided, configured for providing three-dimensional data of a region of interest. The system comprising: an optical unit and a control unit. The optical unit comprises a radiation collection unit and a detection unit. The radiation collection unit comprises at least two mask arrangement defining at least two radiation collection regions respectively, the mask arrangements are configured to sequentially apply a plurality of a predetermined number of spatial filtering patterns formed by a predetermined arrangement of apertures applied on radiation collected thereby generating at least two elemental image data pieces corresponding to the collected radiation from said at least two collection regions. The control unit comprising is configured for receiving and processing said at least two elemental image data pieces and determining a plurality of at least two restored elemental images respectively being together indicative of a three dimensional arrangement of the region being imaged.

Rotating Scatter Mask for Directional Radiation Detection and Imaging

A radiation imaging system images a distributed source of radiation from an unknown direction by rotating a scatter mask around a central axis. The scatter mask has a pixelated outer surface of tangentially oriented, flat geometric surfaces that are spherically varying in radial dimension that corresponds to a discrete amount of attenuation. Rotation position of the scatter mask is tracked as a function of time. Radiation counts from gamma and/or neutron radiation are received from at least one radiation detector that is positioned at or near the central axis. A rotation-angle dependent detector response curve (DRC) is generated based on the received radiation counts. A reconstruction algorithm for distributed radiation source(s) and/or localized source(s) are applied based on the tracked rotation position and prior characterization of the detector response for a given scatter mask. A two-dimensional image with relative orientation and source distribution is generated from the measured DRC.

Gamma-Ray Imaging

A coded mask apparatus is provided for gamma rays. The apparatus uses nested masks, at least one of which rotates relative to the other. 1. A mask apparatus for use in compressed sensing of incoming radiation , the mask apparatus comprising:a coded mask having a body portion comprised of a material that modulates the intensity of the incoming radiation;wherein the coded mask has a plurality of mask aperture regions that allow a higher transmission of the radiation relative to said body portion, the higher transmission being sufficient to allow reconstruction of compressed sensing measurements;wherein the coded mask is configured to rotate relative to the mask apparatus.2. The mask apparatus of claim 1 , wherein the coded mask is rectangular claim 1 , circular claim 1 , arcuate claim 1 , cylindrical claim 1 , hemispherical claim 1 , segments of spheres claim 1 , or spherical.3. The mask apparatus of claim 1 , wherein the coded mask is formed:i) from a material that modulates incoming gamma-ray radiation;ii) from a material that modulates incoming optical or infrared radiation;iii) from a material that modulates incoming neutron radiation; oriv) from a material that modulates both incoming gamma-ray radiation and neutrons.4. The mask apparatus of claim 1 , wherein:some of the mask aperture regions are modulating regions for gamma-rays and some of the mask aperture regions are modulating regions for neutrons.5. The mask apparatus of claim 1 , wherein:a) the mask apparatus has a horizontal field of view of 360°; orb) the coded mask is hemispherical and the mask apparatus has a field of view of 2π; orc) the coded mask is spherical and the mask apparatus has a field of view of nearly 4π.6. The mask apparatus of claim 1 , further comprising a radiation shield formed of a material that modulates the intensity of the incoming radiation; wherein the radiation shield has an opening that limits a field of view of detection of the incoming radiation.7. The mask apparatus as ...

Microchannel plate

Device for imaging an object by means of electromagnetic radiation that can be spatially modulated by masks or high-energy corpuscle radiation

Method for treating a radiation spectrum measured by a detector

Detector array and method

A detector array and method are disclosed in which plural sets of electrode elements are provided with each set comprising a plurality of linear extending parallel electrodes. The sets of electrode elements are disposed at an angle (preferably orthogonal) with respect to one another so that the individual elements intersect and overlap individual elements of the other sets. Electrical insulation is provided between the overlapping elements. The thus configured detector array is exposed to a source of charged particles which in accordance with one embodiment comprise electrons derived from a microchannel array plate exposed to photons. Amplifier and discriminator means are provided for each individual electrode element. Detection means is provided to sense pulses on individual electrode elements in the sets, with coincidence of pulses on individual intersecting electrode elements being indicative of charged particle impact at the intersection of the elements. Electronic readout means are provided to provide an indication of coincident events and the location where the charged particle or particles impacted. Display means are provided for generating appropriate displays representative of the intensity and location of charged particles impacting on the detector array.

Method and device for characterizing an electron beam

A device for detecting X-rays radiated out of a substrate surface, said device comprising at least one X-ray detector, a resolver grating and a modulator grating, said resolver grating with at least one opening facing towards said X-ray detector is arranged in front of said X-ray detector. Said modulator grating is provided between said resolver grating and said substrate at a predetermined distance from said resolver grating and said substrate, where said modulator grating having a plurality of openings in at least a first direction, wherein said x-rays from said surface is spatially modulated with said modulator grating and resolver grating.

Lensless imaging system using an image sensor with one or more attenuation layers

System and method for X-ray image acquisition and processing

An imaging system is provided. The imaging system includes an X-ray radiation source. The imaging system also includes a source controller coupled to the X-ray radiation source and configured to modulate an exposure pattern from the X-ray radiation source to enable a coded exposure sequence. The imaging system further includes a digital X-ray detector configured to acquire image data that includes at least one coded motion blur.

Radiation source distribution image forming apparatus

Method and apparatus for characterizing electron beam

一种用于检测从基板表面辐射出的X射线的装置，所述装置包括至少一个X射线检测器、解析器光栅以及调制器光栅，具有朝向所述X射线检测器的至少一个开口的所述解析器光栅被布置在所述X射线检测器前面。在所述解析器光栅与所述基板之间，所述调制器光栅被提供在与所述解析器光栅和所述基板相距为预定距离处，其中所述调制器光栅在至少第一方向上具有多个开口，其中利用所述调制器光栅和解析器光栅，对来自所述表面的所述x射线进行空间调制。

Gamma ray imaging

Gamma camera based on double coding plates and method for positioning radioactive substances by using gamma camera

本发明公开了一种基于双编码板的伽马相机及其用于放射性物质定位的方法，属于辐射探测技术和放射性监测领域，可以获得高于阵列探测器像素个数的高分辨率辐射图像。本发明包括：第一编码板、第二编码板、编码板切换装置、阵列探测器、探测器位置变换装置、深度相机、数据采集处理系统、屏蔽结构；利用两个编码板和一个阵列探测器，通过进行两次放射性成像并将图像叠加，可以获得更高分辨的放射性图像，同时利用探测器得到的能谱和剂量数据，结合深度相机的距离检测功能，可以实现放射性物质的位置、种类、活度、剂量的测定，实现一种多功能多用途的放射性位置定位方法。

Method and apparatus for the detection of hydrogenous materials

An improved method and apparatus for the detection of hydrogenated materials. Detection of concealed hydrogenated materials such as organic explosives, drugs, or biological tissue is accomplished by measuring the backscattering of neutrons from hydrogenous material in the targeted environment. The system comprises a neutron source that provides information as to the time at which the neutron is emitted, and a neutron sensor, which provides information as to the time at which the neutron is detected and may provide information as to the location at which the neutron is detected. The invention comprises a timing circuit that deactivates the neutron sensor during a time delay to reject signals from neutrons that have not scattered from hydrogen nuclei. The invention may further cease to detect neutrons after a window to reject signals from neutrons that have scattered off distant hydrogen nuclei, which may represent background noise. The device, therefore, preferentially detects thermalized neutrons with resulting enhanced sensitivity. The invention allows for rapid and effective detection of hydrogenated materials that may be hidden from view in the ground, in buildings, vehicles, baggage, or other structures.

DEVICE FOR THE THREE-DIMENSIONAL LOCATION OF RADIATION SOURCES

IMAGING SYSTEM FOR IMAGING QUICK MOVING OBJECTS

Système d'imagerie destiné à l'imagerie d'objets présentant un mouvement rapide, comportant une source de rayons X (2), un écran scintillateur (5), un obturateur (6, 6', 106) et un détecteur (8) du faisceau émis par l'obturateur (6, 6', 106), une unité de traitement (9) reliée au détecteur (8), l'obturateur (6, 6', 106) étant disposé entre l'écran scintillateur (5) et le détecteur (8), et un support (29) pour l'objet à observer disposé en aval de la source de rayon X (2) et en amont de l'écran scintillateur (5), l'obturateur (6, 6', 106) étant un obturateur pilotable à des fréquences élevées, par exemple supérieures à environ 1 kHz, l'obturateur (6, 6', 106) étant fixe et la transmission du signal provenant de l'écran scintillateur vers le détecteur étant commandé par des moyens de polarisation électrique (13) contrôlés par une unité de commande (11). Imaging system for imaging fast moving objects, comprising an X-ray source (2), a scintillator screen (5), a shutter (6, 6 ', 106) and a detector (8) of the beam emitted by the shutter (6, 6 ', 106), a processing unit (9) connected to the detector (8), the shutter (6, 6', 106) being arranged between the scintillator screen (5), ) and the detector (8), and a support (29) for the object to be observed disposed downstream of the X-ray source (2) and upstream of the scintillator screen (5), the shutter (6, 6 ', 106) being a shutter controllable at high frequencies, for example greater than about 1 kHz, the shutter (6, 6', 106) being fixed and the transmission of the signal from the scintillator screen to the detector being controlled by electric biasing means (13) controlled by a control unit (11).

IMAGING SYSTEM FOR IMAGING QUICK MOVING OBJECTS

System and method for the detection of abnormal radiation exposures using pulsed optically stimulated luminescence

This invention relates generally to luminescence techniques for imaging radiation fields and, more specifically, to the use of experimental and mathematical methods to distinguish between dynamic irradiation and static—or other abnormal radiation—exposure conditions for applications in personnel and environ mental radiation dosimetry, or related fields. In more particular, the instant invention provides a rapid and reliable method of detecting abnormal dosimeter exposure conditions over a wide dynamic range of radiation doses, while avoiding significant background interference and stimulation light leakage. Additionally, the preferred embodiment of the instant invention uses a pulsed and synchronized luminescence detection scheme. Further, this invention teaches a complete method and system for abnormal exposure detection—including the use of a luminescent thin powder layer, the use of a periodic radiation absorbing filter, the pulsed stimulation and synchronized luminescence detection scheme, and the method of analyzing and interpreting the recorded images. Finally, the system provides a means of mathematically characterizing an image as containing either a normal or abnormal exposure.

Patent FR2112244A1

X-ray diagnostic apparatus

(57)【要約】本公報は電子出願前の出願データであるた め要約のデータは記録されません。

DEVICE FOR LIMITING THE APPEARANCE OF DECODING ARTIFACTS FOR GAMMA CAMERA WITH CODE MASK.

METHOD FOR RECONSTRUCTING SUCCESSIVE PARALLEL CUT IMAGES OF AN OBJECT CONTAINING GAMMA RADIATION SOURCES

Device and method for locating sources of ionizing radiation

L’invention concerne un dispositif de localisation (1) de sources de rayonnements ionisants (2A, 2B) comprenant : un détecteur de rayonnements ionisants (10) adapté pour détecter et fournir un signal de détection représentatif de particules ionisantes ; un masque codé (20) linéaire circulaire entrainé en rotation autour du détecteur de rayonnements ionisants (10) ; une unité de traitement (40) configurée pour déterminer à partir desdits signaux de détection et des orientations du masque codé (20), et sur la base d’un produit de convolution, une information concernant la direction de l’au moins une source de rayonnements ionisants (2A, 2B) vis-à-vis du détecteur de rayonnements ionisants (10) dans un plan perpendiculaire à un axe de rotation du masque codé (20). L’invention concerne en outre procédé de localisation de sources de rayonnements ionisants (2A, 2B). Figure pour l’abrégé : figure 1 The invention relates to a device (1) for locating sources of ionizing radiation (2A, 2B) comprising: an ionizing radiation detector (10) adapted to detect and provide a detection signal representative of ionizing particles; a circular linear code mask (20) rotated around the ionizing radiation detector (10); a processing unit (40) configured to determine from said detection signals and from the orientations of the coded mask (20), and on the basis of a convolution product, information concerning the direction of the at least one source of ionizing radiation (2A, 2B) vis-à-vis the ionizing radiation detector (10) in a plane perpendicular to an axis of rotation of the coded mask (20). The invention further relates to a method for locating sources of ionizing radiation (2A, 2B). Figure for abstract: figure 1

Device for high-sensitivity imagery of a particle beam

Device for high-sensitivity imagery of a particle beam, characterised in that it comprises, in an empty space and in this order, in the path of the beam to be visualised: - means for converting particles into electrons; - a set of microchannel discs for producing the amplification of the electron flux by multiplication of the electrons; - an electroluminescent screen coupled to a set of optical fibres collecting the light photons which have appeared on this screen; - a matrix of photosensitive diodes; - a device for digitising and storing the signals emitted by the diodes.

Apparatus, method and system for sparse detector

An apparatus, system, and method involving one or more sparse detectors are provided. A sparse detector may include an array of scintillator crystals generating scintillation in response to radiation and an array of photodetectors generating an electrical signal in response to the scintillation. A portion of the scintillator crystals may be spaced apart by substituents or gaps. The distribution of the substitutes or gaps may be according to a sparsity rule. At least a portion of the array of photodetectors may be coupled to the array of scintillator crystals. An imaging system including an apparatus that may include one or more sparse detectors is provided. The imaging system may include a processor to process the imaging data acquired by the apparatus or system including the one or more sparse detectors. The method may include preprocess the acquired image data and produce images by image reconstruction.

Method and apparatus for the detection of hydrogenous materials

Radiation source distribution image formation device

(57)【要約】 【課題】装置の小型化を達成して占有スペースを少なく するとともに、被検体の放射線源分布画像を迅速に形成 することができる放射線源分布画像形成装置を提供す る。 【解決手段】Ｘ方向移動モータ３０ａ、３０ｂを駆動 し、放射線情報検出部１８を矢印Ｘ方向に移動させ、ガ イドレール１６ａ、１６ｂ間に配置されたストレッチャ ー２６上の被検体２８から放出される放射線を検出ユニ ット６４を構成するコリメータおよびラインセンサを用 いて検出し、被検体２８の放射線源分布画像を形成す る。

Coded imaging systems

A nuclear imaging system in which a substantially on-axis Fresnel zone plate positioned between a source of nuclear radiation in living tissue and a spatial detector is moved in a predetermined time sequence in synchronism with motion of a bar pattern formed at the spatial detector output to improve suppression of unwanted spatial frequency components and to facilitate production of an image of the nuclear source.

Anodes for improved detection of adjacent uncollected signals

L'invention concerne un ensemble détecteur de rayonnement comprenant un détecteur à semi-conducteur, un collimateur, plusieurs anodes pixellisées et au moins un processeur. Le collimateur comporte des ouvertures définissant des pixels. Chaque anode pixellisée est configurée pour générer un signal primaire en réponse à la réception d'un photon et pour générer au moins un signal secondaire en réponse à la réception d'un photon par au moins une anode environnante. Chaque anode pixellisée inclut une première partie et une seconde partie situées dans des ouvertures différentes du collimateur. L'au moins un processeur est couplé de manière opérationnelle aux anodes pixellisées, et configuré pour acquérir un signal primaire provenant de l'une des anodes pixellisées ; acquérir au moins un signal secondaire provenant d'au moins une anode pixellisée voisine ; et déterminer un emplacement de réception du photon en utilisant le signal primaire et l'au moins un signal secondaire. Figure pour l’abrégé : ? A radiation detector assembly includes a semiconductor detector, a collimator, multiple pixelated anodes, and at least one processor. The collimator has apertures defining pixels. Each rasterized anode is configured to generate a primary signal in response to reception of a photon and to generate at least one secondary signal in response to reception of a photon by at least one surrounding anode. Each rasterized anode includes a first part and a second part located in different openings of the collimator. The at least one processor is operably coupled to the raster anodes, and configured to acquire a primary signal from one of the raster anodes; acquiring at least one secondary signal from at least one neighboring pixelated anode; and determining a reception location of the photon using the primary signal and the at least one secondary signal. Figure for the abstract:?

System and method for detection of extraordinary radiation exposure using pulsed and optically stimulated luminescence

Method for imaging an object which contains distributed radiation sources, and apparatus for performing the method.

System and method for imaging with pinhole arrays

A method and system are provided, for imaging a region of interest with pinhole based imaging. The method comprising: collecting input radiation from the region of interest through a selected set of a plurality of a predetermined number of aperture arrays, each array having a predetermined arrangement of apertures and collecting the input radiation during a collection time period, wherein said selected set of the aperture arrays and the corresponding collection time periods defining a total effective transmission function of the radiation collection, generating image data from the collected input radiation, said image data comprising said predetermined number of image data pieces corresponding to the input radiation collected through the aperture arrays respectively, processing the image data pieces utilizing said total effective transmission function of the radiation collection, and determining a restored image of the region of interest. The set of aperture arrays is preferably selected such that said total effective transmission function provides non-null transmission for spatial frequencies being lower than a predetermined maximal spatial frequency.

Signal analysis method for neutral atom imaging unit

本发明提供一种中性原子成像单元信号分析方法，该方法包括：提供一中性原子成像单元，中性原子成像单元包括半导体探测器阵列以及间隔设置在探测器阵列前方的调制栅格；提供一中性原子源平面，中性原子源平面发出的能量中性原子经调制栅格后由探测器阵列接收，调制栅格在探测器阵列上形成投影；根据投影，获得探测器响应函数；计算中性原子成像单元所获得的数据信号；根据探测器响应函数以及数据信号，对中性原子发射源进行反演成像。该方法能够根据探测器获得的中性原子信息，例如中性原子在不同条带的计数等对中性原子发射源进行很好的反演，从而对中性原子发射源进行成像，获得中性原子发射源的强度和大小等。本发明的上述方法易于执行，反演结果准确。

Ionized radiation detector

Method and apparatus for coded-aperture imaging

Coded aperture imaging

This invention provides coded aperture imaging apparatus and methods for the detection and imaging of radiation which results from nuclear interrogation of a target object. The apparatus includes: 1) a radiation detector for detecting at least a portion of the radiation emitted by the object in response to nuclear excitation and for producing detection signals responsive to the radiation; 2) a coded aperture disposed between the detector and the object such that emitted radiation is detected by the detector after passage through the coded aperture; and 3) a data processor for characterizing the object based upon the detection signals from the detector and upon the configuration of the coded aperture. The method includes the steps of: 1) disposing a coded aperture in selected proximity to the object; 2) bombarding the object with a interrogation beam from a source of excitation energy; 3) detecting, with a detector, at least a portion of the radiation emitted in response to the interrogation beam, the detector producing detection signals responsive to the radiation, the detector being disposed so that the coded aperture is between the detector and the object and such that emitted radiation is detected by the detector after passage through the coded aperture; and 4) processing the detection signals to characterize the object based upon radiation detected by the detector after passage through the coded aperture, and based upon the configuration of the coded aperture.

Portable and versatile gamma or x-ray imaging device for non-destructive testing of suspicious packages incorporating the transmission and backscatter imaging techniques

Dual-sided coded-aperture imager

In a vehicle, a single detector plane simultaneously measures radiation coming through two coded-aperture masks, one on either side of the detector. To determine which side of the vehicle a source is, the two shadow masks are inverses of each other, i.e., one is a mask and the other is the anti-mask. All of the data that is collected is processed through two versions of an image reconstruction algorithm. One treats the data as if it were obtained through the mask, the other as though the data is obtained through the anti-mask.

Method and device for characterizing an electron beam

A device for detecting X-rays radiated out of a substrate surface, said device comprising at least one X-ray detector, a resolver grating and a modulator grating, said resolver grating with at least one opening facing towards said X-ray detector is arranged in front of said X-ray detector. Said modulator grating is provided between said resolver grating and said substrate at a predetermined distance from said resolver grating and said substrate, where said modulator grating having a plurality of openings in at least a first direction, wherein said x-rays from said surface is spatially modulated with said modulator grating and resolver grating.

Compressive imaging method and system comprising a detector, a mask, and a drive for rotating the mask about at least one of one or more axes of rotational symmetry

A mask for use in compressed sensing of incoming radiation includes a material that modulates an intensity of incoming radiation, a plurality of mask aperture regions, and one or more axes of rotational symmetry with respect to the mask aperture regions. Each mask aperture region includes at least one mask aperture that allows a higher transmission of the incoming radiation relative to other portions of the mask aperture region. The relative transmission sufficient to allow a reconstruction of compressed sensing measurements and has a shape that provides a symmetry under rotation about the one or more axes of rotational symmetry. A mutual coherence of a sensing matrix generated by a rotation of the plurality of mask aperture regions is less than one. An imaging system for compressed sensing of incoming radiation including such a mask is also provided.

Collimator for detector, and application thereof

一种用于探测器(600)的准直器(10)，准直器(10)包括：底板(100)，底板(100)上设置有呈阵列分布的成像通孔(110)，成像通孔(110)包含第一孔段(111)和第二孔段(112)，且第一孔段(111)的横向尺寸沿自由端向第二孔段(112)的方向逐渐减小，第二孔段(112)的横向尺寸沿自由端向第一孔段(111)的方向逐渐减小；屏蔽圈(200)，屏蔽圈(200)形成在底板(100)上；以及顶板(300)，顶板(300)设置在屏蔽圈(200)内，并封闭屏蔽圈(200)的至少部分开口，且顶板(300)上设置有呈阵列分布的屏蔽通孔(310)，且成像通孔(110)和屏蔽通孔(310)一一对应设置。

Coded aperture imaging

This invention provides coded aperture imaging apparatus and methods for the detection and imaging of radiation which results from nuclear interrogation of a target object. The apparatus includes: 1) a radiation detector for detecting at least a portion of the radiation emitted by the object in response to nuclear excitation and for producing detection signals responsive to the radiation; 2) a coded aperture disposed between the detector and the object such that emitted radiation is detected by the detector after passage through the coded aperture; and 3) a data processor for characterizing the object based upon the detection signals from the detector and upon the configuration of the coded aperture. The method includes the steps of: 1) disposing a coded aperture in selected proximity to the object; 2) bombarding the object with a interrogation beam from a source of excitation energy; 3) detecting, with a detector, at least a portion of the radiation emitted in response to the interrogation beam, the detector producing detection signals responsive to the radiation, the detector being disposed so that the coded aperture is between the detector and the object and such that emitted radiation is detected by the detector after passage through the coded aperture; and 4) processing the detection signals to characterize the object based upon radiation detected by the detector after passage through the coded aperture, and based upon the configuration of the coded aperture.

Method of and device for coding and decoding an image of an object by means of penetrating radiation

A method of and a device for the coding and decoding of an object by means of point-shaped radiation sources. The point sources are subdivided in groups which successively irradiate the object. Two sources distributions can be derived from the groups of radiation sources (a negative radiation intensity is assigned to at least one group), the sum of the autocorrelation functions thereof having the value "0" outside the origin. The coded images generated by means of the various groups are recorded (and also their negatives). Combinations of a coded image and a negative are decoded via point holograms or lens matrices, thus forming a subimage. The sum of all subimages forms an object image which is free of artefacts.

Gamma-ray imaging

The invention provides a mask apparatus for use in sensing of incoming radiation, comprising: one or more coded masks, each of the masks having a body formed of a material that modulates the intensity of the incoming radiation; wherein each of the one or more masks has a plurality of mask aperture regions that allow a higher transmission of the radiation relative to other portions of the one or more coded masks; one or more of the coded masks is configured to rotate. When the mask apparatus has more than one coded mask, two of the coded masks are configured to rotate relative to one another. There is also provided a radiation detection method and a radiation imager.

Hybrid solid-state measuring transducer for image brightness intensification

FIELD: image intensifiers using measuring transducers for high-gain night vision systems responding to low illumination level. SUBSTANCE: proposed hybrid solid-state measuring transducer that combines optimal function of image intensifier characterized in high signal-to-noise ratio and more optimal logarithmic gain characteristic with function of electronic reader or MOS or CMOS, or charge-coupled device has image signal shaper with brightness intensifying cathode, microchannel wafer, and case enclosure. EFFECT: enlarged functional capabilities. 21 cl, 14 dwg

Method for treating a radiation spectrum measured by a detector

L'invention concerne un procédé de traitement de spectres en énergie d'un rayonnement transmis par un objet irradié par une source de rayonnements ionisants, en particulier un rayonnement X, pour des applications en imagerie médicale ou le contrôle non destructif. Le procédé met en oeuvre un détecteur comportant une pluralité de pixels, chaque pixel étant apte à acquérir un spectre du rayonnement transmis par l'objet. Le procédé permet, à partir d'une pluralité de spectres détectés, d'établir un spectre, dit spectre de diffusion, représentatif d'un rayonnement diffusé par l'objet. Chaque spectre acquis est corrigé en prenant en compte le spectre de diffusion ainsi établi. L'invention permet de réduire l'influence de la diffusion, par l'objet, du spectre émis par la source. The invention relates to a method for the treatment of energy spectra of radiation transmitted by an object irradiated by a source of ionizing radiation, in particular X-ray radiation, for applications in medical imaging or non-destructive testing. The method uses a detector comprising a plurality of pixels, each pixel being able to acquire a spectrum of the radiation transmitted by the object. The method makes it possible, from a plurality of detected spectra, to establish a spectrum, called scattering spectrum, representative of a radiation scattered by the object. Each acquired spectrum is corrected by taking into account the diffusion spectrum thus established. The invention makes it possible to reduce the influence of the diffusion, by the object, of the spectrum emitted by the source.

Method and apparatus for coded aperture imaging

Patent JPS5129940A

Portable and versatile X-ray or gamma imaging device for non-destructive examination of suspicious packages, integrating transmission and backscattering imaging techniques

Portable and versatile X-ray or gamma imaging device for non-destructive examination of suspicious packages, integrating transmission and backscattering imaging. It comprises an X or gamma radiation source ( 4 ) adapted to radiography, a large and finely pixelated detector ( 6 ) sensitive to X rays or gamma rays adapted to radiography, a removable shielding and collimation accessory ( 5 ) to adapt the source to backscattering imaging, a removable accessory ( 10 ) comprising a large and finely pixelated coded mask placed in contact with the detector when a backscattering imaging or radioactive source imaging is made, and a synchronized control system ( 14 ) for the source, the detector and the latter accessory, and for data acquisition and processing to display an image in real time.

Image sensors having radiation detectors and masks

Disclosed herein is an image sensor comprising: a plurality of radiation detectors; a mask with a plurality of radiation transmitting zones and a radiation blocking zone; and an actuator configured to move the plurality of radiation detectors from a first position to a second position and to move the mask from a third position to a fourth position; wherein while the radiation detectors are at the first position and the mask is at the third position and while the radiation detectors are at the second position and the mask is at the fourth position, the radiation blocking zone blocks radiation from a radiation source that would otherwise incident on a dead zone of the image sensor and the radiation transmitting zones allow at least a portion of radiation from the radiation source that would incident on active areas of the image sensor to pass through.

Device for locating and imaging gamma or x-radiation sources.

Device for locating and imaging gamma or X-radiation sources, comprising: (a) a detection assembly (2) comprising at least two gamma or X-radiation detectors sensitive to position, as well as a coded mask (10) made of a radiation opaque material; and (b) electronic means (4) for processing the electrical pulses provided by said detectors, so as to locate the source and form a bi- or tri- dimensional image thereof. The device is characterized in that the electronic means (4) are suitable for reconstructing a bi- or tri- dimensional image of an X or gamma radiation source (16) by applying a data processing method which combines the principles of Compton imaging and coded-mask imaging.

METHOD FOR TREATING A SPECTRUM OF A RADIATION MEASURED BY A DETECTOR

L'invention concerne un procédé de traitement de spectres en énergie d'un rayonnement transmis par un objet irradié par une source de rayonnements ionisants, en particulier un rayonnement X, pour des applications en imagerie médicale ou le contrôle non destructif. Le procédé met en œuvre un détecteur comportant une pluralité de pixels, chaque pixel étant apte à acquérir un spectre du rayonnement transmis par l'objet. Le procédé permet, à partir d'une pluralité de spectres détectés, d'établir un spectre, dit spectre de diffusion, représentatif d'un rayonnement diffusé par l'objet. Chaque spectre acquis est corrigé en prenant en compte le spectre de diffusion ainsi établi. L'invention permet de réduire l'influence de la diffusion, par l'objet, du spectre émis par la source. The invention relates to a method for the treatment of energy spectra of radiation transmitted by an object irradiated by a source of ionizing radiation, in particular X-ray radiation, for applications in medical imaging or non-destructive testing. The method implements a detector comprising a plurality of pixels, each pixel being able to acquire a spectrum of the radiation transmitted by the object. The method makes it possible, from a plurality of detected spectra, to establish a spectrum, called scattering spectrum, representative of a radiation scattered by the object. Each acquired spectrum is corrected by taking into account the diffusion spectrum thus established. The invention makes it possible to reduce the influence of the diffusion, by the object, of the spectrum emitted by the source.

Attenuation zone plate

An attenuation zone plate for coded-aperture imaging of a radiation source has mercury contained within a wedge-shaped chamber in a plastic housing. Reservoir and relief cavities facilitate filling the housing with mercury and accommodate changes in mercury volume. Lead plates positioned on the perimeter of the housing provide a field of view mask. In one embodiment, the housing cover pivots to vary the wedge angle. Advantages include greater facility in precision manufacturing and greater attenuation pattern flexibility.

Gamma-ray imaging.

Un aparato de máscara codificada se proporciona para rayos gamma. El aparato usa máscaras anidadas, al menos una de las cuales gira con relación a la otra.

Gamma-ray imaging

A coded mask apparatus is provided for gamma rays. The apparatus uses nested masks, at least one of which rotates relative to the other.

Compressive imaging method and system

A mask for use in compressed sensing of incoming radiation, the mask comprising: a body formed of a material that modulates an intensity of incoming radiation of interest. The body has a plurality of mask aperture regions, each comprising at least one mask aperture that allows a higher transmission of the radiation relative to other portions of the respective mask aperture region, the relative transmission being sufficient to allow reconstruction of the compressed sensing measurements; the mask has one or more axes of rotational symmetry with respect to the mask aperture regions; the mask apertures have a shape that provides symmetry after a rotation about the one or more axes of rotational symmetry; and mutual coherence of a sensing matrix generated by the rotation of the respective mask aperture regions is less than one. An imaging system for compressed sensing of incoming radiation comprising such a mask is also provided.

Intensified hybrid solid-state sensor

增强复合型固态传感器包括一个成像装置，该成像装置包括与一个图像增强器阴极(54)，一个微通道片(MCP)(53)和主体外壳(61)组装在一起的固态传感器(56)。该装置将图像增强器的最好的功能，良好的信噪比和高对数增益与互补金属氧化物半导体(CMOS)或者电荷耦合装置(CCD)的电子读出功能相结合。本发明主要应用于需要良好的弱光灵敏性和高增益的夜视系统。

Intensified hybrid solid-state sensor

An intensified solid-state imaging sensor includes a photo cathode for converting light from an image into electrons, an electron multiplying device for receiving electrons from the photo cathode, and a solid-state image sensor including a plurality of pixels for receiving the electrons from the electron multiplying device through a plurality of channels of the electron multiplying device. The solid-state image sensor generates an intensified image signal from the electrons received from the electron multiplying device. The plurality of channels are arranged in a plurality of channel patterns, and the plurality of pixels are arranged in a plurality of pixel patterns. Each of the plurality of channel patterns is mapped to a respective one of the plurality of pixel patterns such that electron signals from each of the plurality of channel patterns is substantially received by the single respective one of the plurality of pixel patterns.

Radiographic camera with internal mask

A radiographic camera having a scintillator and an array of photodetectors positioned for viewing a common region of the scintillator, and wherein a mask system is interposed between the scintillator and the array of photodetectors for increasing the resolution of an image produced by the camera. The mask system has a pair of mask plates which are spaced apart and have similar formats of opaque materials thereon. The mask system provides a more rapid variaton in the intensity of light received at a photodetector as a function of locations of scintillations on the scintillator. A reference signal source providing a signal pattern in accordance with the intensity variation is utilized for decoding shadows cast by the mask to produce the image.

Intensified hybrid solid-state sensor

An intensified solid-state imaging sensor (41) includes a photo cathode (54) for converting light from an image into electrons, an electron multiplying device (53) for receiving electrons from the photo cathode, and a solid-state image sensor (56) including a plurality of pixels for receiving the electrons from the electron multiplying device through a plurality of channels of the electron multiplying device. The solid-state image sensor generates an intensified image signal from the electrons received from the electron multiplying device. The plurality of channels are arranged in a plurality of channel patterns, and the plurality of pixels are arranged in a plurality of pixel patterns. Each of the plurality of channel patterns is mapped to a respective one of the plurality of pixel patterns such that electron signals from each of the plurality of channel patterns is substantially received by the single respective one of the plurality of pixel patterns.

Gamma-ray imaging.

Un aparato de máscara codificada se proporciona para rayos gamma. El aparato usa máscaras anidadas, al menos una de las cuales gira con relación a la otra.

Coded imaging systems and methods

1509686 Spatial filtering RAYTHEON CO 11 June 1975 [26 June 1974] 04937/77 Divided out of 1509685 Heading G2J [Also in Division H4] The subject-matter of this Specification is substantially the same as that of Parent Specification but the claims are directed to a method (and apparatus for carrying out the method) of obtaining imaging data of an object emitting radiant energy (e.g. living tissue emitting nuclear radiation). The method comprises the steps of detecting the radiant energy with a detector; spatially coding the radiant energy by coding means having a pattern (e.g. a Fresnel pattern) of opaque and transparent regions which are sufficiently thin for the coding means to be non-collimating; positioning the opaque regions of the coding means sequentially in a plurality of locations (e.g. by rotating a mask bearing Fresnel patterns which differ in phase); the detector providing arrays of values of detected energy wherein one of the arrays of values differs from a second of the arrays in accordance with the locations of the opaque regions; and combining one of the arrays of values with a second of the arrays to obtain the imaging data.

Patent JPS56501856A

Intensified hybrid solid-state sensor

FIELD: physics; image processing. SUBSTANCE: intensified solid-state imaging device (41) includes a photocathode (54) for converting light from an image to electrons, an electronic multiplier (53) for receiving electrons from the photocathode and a solid-state image detector (56) which includes several pixels for receiving electrons from the electronic multiplier through several channels of the electronic multiplier. The solid state image detector generates an intense image signal from electrons received from the electronic multiplier. Several channels are placed in several channel images and several pixels are placed in several pixel images. EFFECT: each of the several channel images is juxtaposed with the corresponding pixel image such that, electronic signals from each of the several channel pictures is virtually received by a single corresponding pixel image. 10 cl, 18 dwg

System and method for imaging with pinhole arrays

System and method for imaging with pinhole arrays

An imaging system is provided, configured for providing three-dimensional data of a region of interest. The system comprising: an optical unit and a control unit. The optical unit comprises a radiation collection unit and a detection unit. The radiation collection unit comprises at least two mask arrangement defining at least two radiation collection regions respectively, the mask arrangements are configured to sequentially apply a plurality of a predetermined number of spatial filtering patterns formed by a predetermined arrangement of apertures applied on radiation collected thereby generating at least two elemental image data pieces corresponding to the collected radiation from said at least two collection regions. The control unit comprising is configured for receiving and processing said at least two elemental image data pieces and determining a plurality of at least two restored elemental images respectively being together indicative of a three dimensional arrangement of the region being imaged.

Segmented electrical or optical delay line with interleaved tap for 3D image device readout

It is the aim of the present invention to provide a single-event imaging device fulfilling the specific needs in terms of high spatial and time resolution and high framing rates. This aim is achieved according to the present invention by a single event imaging device, comprising: a) at least one delay line (DL) assigned to an image plane (IP); said delay line (DL) allowing two pulses to propagate in opposite directions along the delay line (DL), said two pulses being generated by the impingement of the single-event (e - , hν) at an impingement position; b) a number of interleaved measurement points (MP1 to MPn) associated with said delay line (DL); said interleaved measurement points (MP1 to MPn) dividing the delay line (DL) into a number of delay line segments (DL1 to DLn); and c) a number of Time-to-Digital convertors (TDC 1 to TDC n ) to detect the arrival time of the pulses at distinct measurement points (MP1 to MPn). Using the delay line in a segmented manner by disposing various interleaved measurement points along the delay line allows to eliminate any distortions incurred by edge effects while simultaneously obtaining the advantage of a shortened delay line in form of logically separated delay line segments allowing an excellent trade-off in terms of spatial resolution and framing rate.

Compression imaging method and system

Radiographic diagnosis apparatus, radiographic diagnosis method, plate member, and position detecting method

A radiographic diagnosis apparatus includes an X-ray generation device for irradiating an object with X-rays, a two-dimensional array detector which is formed by arraying small detecting elements in a two-dimensional matrix and opposing the X-ray generation device with the object interposed between them and detects X-rays transmitted through the object in units of pixels, a ray conversion plate adhered to the detecting surface of the array detector to change the properties of X-rays in units of pixels, and an image processor for performing image processing based on data from the array detector, thereby generating a radiographic diagnosis image. The ray conversion plate includes a plurality of different types of attenuating elements arrayed in a checkerboard pattern to attenuate radiation at different attenuation ratios. The properties of X-rays are changed via the ray conversion plate. The ray conversion plate changes the properties into two types. The array detector detects two types of property-changed X-ray signals transmitted through the object in units of pixels, and converts the signals into digital signals.