КОМПЕНСАЦИЯ КОЛЕБАНИЙ АНОДА В РЕНТГЕНОВСКИХ ТРУБКАХ С ВРАЩАЮЩИМСЯ АНОДОМ

... 1. Система для измерения и компенсации повторяющегося отклонения (∆z) реального положения от желаемого положения фокального пятна пучка электронов (FS), причем указанный пучок электронов (EB) излучается электронным эмиттером катода рентгеновской трубки (С) в области мишени (АТ) вращающегося анодного диска рентгеновской трубки (RA), где указанная система включает в себя датчик положения (WS), адаптированный для определения повторяющегося отклонения, по меньшей мере, за один его период, элемент отклонения пучка (BD) с интегрированным устройством управления, адаптированный для отклонения указанного пучка электронов (EB) на основании результатов измерения, полученных с датчика положения (WS), таким образом, что путь фокального пятна пучка электронов описывает определенную траекторию, причем указанная система адаптирована для измерения и компенсации периодического колебания угла наклона вращающегося анодного диска (RA) рентгеновской трубки относительно идеальной плоскости вращения, которая ориентирована ...

ИСТОЧНИК РЕНТГЕНОВСКИХ ЛУЧЕЙ СО МНОЖЕСТВОМ ЭМИТТЕРОВ ЭЛЕКТРОНОВ

... 1. Источник (100, 200) рентгеновских лучей, содержащий:а) мишень (110, 210), предназначенную для испускания рентгеновских лучей (Х) при бомбардировке ее пучком электронов (В, В'); иb) генератор (120, 220) пучка электронов с, по меньшей мере, двумя источниками (121) пучков электронов для селективного испускания пучков электронов (В, В'), которые сходятся в направлении мишени, упомянутый генератор (120, 220) пучка электронов содержитb1) эмиттерное устройство (140, 240) с набором эмиттеров (141, 241) электронов; иb2) электродное устройство (130, 230) с набором электродных элементов (131, 231) для селективного направления пучков электронов (В, В'), испущенных эмиттерным устройством, электродный элемент и электродный эмиттер представляют источник пучка электронов.2. Источник (100, 200) рентгеновских лучей по п.1,отличающийся тем, что пучки электронов (В, В'), испущенные источниками (121) пучков электронов, ударяют мишень (110, 210) в точках (Т, Т') мишени, которые лежат на, по меньшей мере, ...

Multifokusröhre

Bei dieser Ausgestaltung wird eine Multifokusröhre vorgeschlagen, wobei die Röntgenquellen derart ansteuerbar sind, dass Röntgenstrahlen unterschiedlicher Röntgenspektren erzeugt werden.

X-ray tube with circular electron beam emitters, e.g. for medical apparatus

The X-ray tube has an evacuated housing containing a pair of circular electron beam emitters (11,12) with respective electron-emitting cathodes (13) and focusing electrodes (14) and a rotary anode (4), coupled to a rotation drive. The electromagnetic system (19) for deflection and focusing of the electron beams provides a quadruple field and a superimposed switched dipole field, parallel to the common plane of both emitters.

Erweiterte Multi-Fleck-Computertomographie-Röntgenstrahlquelle

Offenbart sind Systeme und Verfahren, die dazu dienen, Multi-Schichtbilder mit einer Gesamtdicke von bis zu etwa 160 mm oder mehr während einer einzigen Gantryumdrehung in der Computertomographie oder der Volumen-Computertomographie zu gewinnen. Ein Ausführungsbeispiel weist eine erweiterte Multifleck-Röntgenstrahlenquelle für Computertomographie oder Volumen-CT-Bildgebung auf, zu der gehören: eine Elektronenstrahlquelle (50), die in der Lage ist, eine Vielzahl von Elektronenstrahlen (52) zu erzeugen, wobei jeder Elektronenstrahl (52) auf eine vorbestimmte Entfernung fokussiert ist und in eine vorbestimmte Richtung gezielt abgegeben wird; und mehrere Zielplatten (62), die angeordnet sind, um die Elektronenstrahlen (52) aufzunehmen und in Antwort darauf Röntgenstrahlen (16) zu erzeugen, wobei jede Zielplatte (62) einen vorbestimmten Brennfleck (83) darauf aufweist, wobei jeder Elektronenstrahl (52) synchronisiert ist, so dass dieser in einem geeigneten Zeitpunkt auf einer vorbestimmten Zielplatte ...

Computer tomography system for generating e.g. x-ray, of e.g. patient., has x-ray radiation device formed such that imaging areas defined by individual x-ray radiation sources on imaging surface are overlapped

The system has an x-ray radiation device (2) formed such that imaging areas defined by individual x-ray radiation sources (2a-2c) on an imaging surface are abutted or overlapped on top of each other in an axial direction. The imaging areas are overcoated by x-ray radiation during rotation of the x-ray radiation sources such that the x-ray radiations of one of the x-ray radiation sources are impinged on image borders of common imaging areas that are formed by overlapping the imaging areas. The image borders run parallel to detector borders. An independent claim is also included for a method for generation of a cross section view of an examining object.

VERFAHREN UND EINRICHTUNG FUER DIE TRANSAXIALE RECHNERUNTERSTUETZTE ROENTGENTOMOGRAPHIE

X-ray computer tomography system

X-RAY COMPUTER TOMOGRAPHY APPARATUS

The X-ray source comprises a ring anode 4 and a plurality of electron sources arrange to sequentially project electron beams onto the anode ring. The electron beam from each source may additionally be scanned electromagnetically over a portion of the anode ring. ...

Apparatuses and methods for generating distributed x-rays

An apparatus for generating distributed x-rays comprises an electron gun 1 (e.g. hot cathode) to generate electron beam currents, a scanning device 2 to generate a magnetic field for deflecting the electron beam currents, a current-limiting device 4 provided in the travel path of the deflected electron beams, and an anode target 5 arranged downstream of the current limiting device 4. The current-limiting device 4 has regular holes or apertures arranged in an array, such that when the electron beam currents scan across the device 4, pulsed electron beams corresponding to the positions of the holes or apertures are outputted sequentially. The pulsed electron beams are accelerated towards the anode 5 and bombard the anode target 5 to sequentially generate a distributed array of x-rays. A focusing device 7 may be provided to reduce the beam spot of the electron beam before deflection.

X-ray tube electron sources

High brightness x-ray reflection source

An x‑ray target, x‑ray source, and x‑ray system are provided. The x‑ray target includes a thermally conductive substrate comprising a surface and at least one structure on or embedded in at least a portion of the surface. The at least one structure includes a thermally conductive first material in thermal communication with the substrate. The first material has a length along a first direction parallel to the portion of the surface in a range greater than 1 millimeter and a width along a second direction parallel to the portion of the surface and perpendicular to the first direction. The width is in a range of 0.2 millimeter to 3 millimeters. The at least one structure further includes at least one layer over the first material. The at least one layer includes at least one second material different from the first material. The at least one layer has a thickness in a range of 2 microns to 50 microns. The at least one second material is configured to generate x-rays upon irradiation by electrons ...

Improvements in and relating to x-ray apparatus

... 151,999. British Thomson - Houston Co., (Assignees of Langmuir, I.). Oct. 29, 1913, [Convention date]. R÷ntgen-ray tubes.-In a high-vacuum tube having an incandescent cathode, as described in Specification 14892/13, a screen is provided for adjustably controlling the focussing of the electron stream, for instance by means of a potential applied between the screen and the cathode. As shown, a nickel, iron, or tungsten screen 8, surrounding an incandescent cathode 2, is maintained at any desired potential by means of a continuouscurrent dynamo 15 with an adjustable resistance 25, and a change-over switch 18 for making the screen potential positive or negative with respect to the cathode. A battery or a source of static potential may be used instead of the dynamo. A negative screen potential produces sharp focusing, and a positive potential, if sufficiently high, may entirely prevent focusing. In a modification, an alternating potential is applied to the screen by means of a transformer, the ...

Backscatter characterization using interlinearly adaptive electromagnetic x-ray scanning

X-RAY TUBE ARRANGEMENT

X-RAY TUBE AND VERFARHEN FOR THE REGULATION OF FOCUS CHARACTERISTICS

X-RAY TUBE WITH VARIABLE ILLUSTRATION SPOT SIZE

Device and method for generating distributed X rays

A device and a method for generating distributed X rays. Electron beams with an initial kinergety and a motion speed are generated in a vacuum by using a hot cathode, and the initial low-energy electron beams are periodically scanned to make the initial low-energy electron beams in reciprocating deflection. On a movement path of the electron beams, a flow limiting apparatus is set in a reciprocating deflection direction; by using an array opening on the flow limiting apparatus, only part of the electron beams reaching some specific positions are allowed to pass through, so as to form sequential distributed electron beam flows; the electron beam flows are again accelerated by using a high-voltage electric field to make the electron beam flows obtain high energy and bombard a long-strip anode target, and corresponding array distributed focuses and X rays are sequentially generated on the anode target.

X-ray generating mechanism using electron field emission cathode

BACKSCATTER CHARACTERIZATION USING INTERLINEARLY ADAPTIVE ELECTROMAGNETIC X-RAY SCANNING

Methods and an x-ray source for sweeping an x-ray beam across an object of inspection. A beam of electrons is emitted by a cathode, while a sweep controller applies a signal to a beam controller in a prescribed path on an anode, thereby causing an x-ray beam to be emitted from an aperture disposed at one apex of a snout of variable length. The aperture may be a Rommel aperture that allows for forming a scanning x-ray of desired size and flux independently of the angle at which the beam is emitted. Scanning rate may be varied during the course of a scan. Multiple x-ray beams may be formed simultaneously, where one beam is inside a conveyance while the other is outside the conveyance, for example.

Verfahren und Einrichtung zum Kontrollieren und Korrigieren der Lage des durch einen Kathodenstrahl erzeugten Brennflecks auf der Antikathode einer Röntgenröhre

An Potentialeinstellmittel angeschlossenes Elektrodensystem zur Erzeugung eines Ladungsträgerstrahles.

Dual energy imaging with beam blocking during energy transition

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

X-ray tube having magnetic quadrupoles for focusing and magnetic dipoles for steering

An X-ray tube can include: a cathode including an electron emitter; an anode configured to receive the emitted electrons; a first magnetic quadrupole between the cathode and the anode and having a first quadrupole yoke with four first quadrupole pole projections extending from the first quadrupole yoke and oriented toward a central axis of the first quadrupole yoke and each of the four first quadrupole pole projections having a first quadrupole electromagnetic coil; a second magnetic quadrupole between the first magnetic quadruple and the anode and having a second quadrupole yoke with four second quadrupole pole projections extending from the second quadrupole yoke and oriented toward a central axis of the second quadrupole yoke and each of the four second quadrupole pole projections having a second quadrupole electromagnetic coil; and a magnetic dipole between the cathode and anode and having a dipole yoke with four dipole electromagnetic coils.

Focal spot temperature reduction using three-point deflection

An x-ray tube includes an anode comprising a focal track and a cathode assembly configured to emit an electron beam toward a focal spot on the focal track. The x-ray tube also includes a controller configured to wobble the electron beam among a plurality of focal points in a direction tangent to the focal track. The plurality of focal points includes at least one focal point that is bounded by a pair of boundary focal points. The controller is further configured to delay a wobble of the electron beam away from the at least one focal point for a pre-determined amount of time.

X-ray tube with secondary discharge attenuation

The present embodiments relate to off-focal X-ray radiation attenuation within X-ray tubes, for example X-ray tubes used in CT imaging. In one embodiment, an X-ray tube for off-focal X-ray radiation attenuation is provided. The X-ray tube includes a cathode, a target, and a magnetic focal spot control unit having at least one electromagnet encased in a resin loaded with X-ray attenuating material.

X-ray generator

An X-ray generator includes an electron source generating an electron beam, a target generating an X-ray by a collision of the electron beam and extending in a direction orthogonal to the electron beam, and a cylindrical electrode covering a collision portion of the target to which the electron beam collides and having a bore allowing the electron beam to pass through. The electron source and the target are arranged in such a way that the X-ray is radiated in the direction orthogonal to an optical axis of the electron beam. A depression equivalent to a notch of the target is provided in a collision face side of the electron beam on the target and also in a reverse location of a tip of the target located on an outgoing radiation side of the X-ray relative to a collision location of the electron beam on the target.

X-RAY TUBE

The present invention relates to an X-ray tube (10) comprising a cathode (20), the cathode comprising: - an electron emitter filament (30); - a first pair of grids (40); and - a second pair of grids (50). The first pair of girds are located at opposite sides of the electron emitter filament. The second pair of girds are located at opposite sides of the electron emitter filament closer to the electron emitter filament than the first pair of grids. The cathode is configured such that a voltage or an average voltage of the first pair of grids is different to a voltage of the second pair of grids.

РЕНТГЕНОВСКИЙ АНОД

Изобретение относится к области рентгенотехники. Вращающийся анод для рентгеновской трубки содержит первый модуль, выполненный с возможностью соударения посредством первого электронного луча, по меньшей мере, второй модуль, выполненный с возможностью соударения, по меньшей мере, посредством второго электронного луча. Первый модуль и второй модуль электрически изолированы друг от друга. Раскрыта также рентгенографическая система, которая содержит анод согласно подробному описанию, главный катод для формирования электронного луча. Главный катод выполнен с возможностью формировать первый электрический потенциал, вспомогательный катод для влияния на второй электрический потенциал, при этом главный катод выполнен с возможностью отклонять электронный луч, чтобы нагревать вспомогательный катод. Кроме того, раскрыто устройство для определения электрического потенциала посредством обнаружения точки соударения электронного луча на аноде согласно подробному описанию и/или посредством обнаружения рентгеновского ...

Anordnung zur Röntgen-Computertomographie mit elektromagnetisch abgelenktem Elektronenstrahl

Anordnung zur Röntgen-Computertomographie eines sich entlang einer axialen Richtung bewegenden Objektes mittels eines elektromagnetisch abgelenkten Elektronenstrahls mit teil- oder vollkreisförmigen Röntgendetektoren aus aneinander gereihten Einzeldetektoren, Mitteln zur Erzeugung, Fokussierung und Ablenkung des Elektronenstrahls (3), und Targets zur Erzeugung von Röntgenstrahlung, wobeia. die Anordnung eine feststehende erste Target-Detektor-Einheit mit einem ersten Target (6) und einem ersten Röntgendetektor (4) aufweist, wobei die Brennfleckbahn (8) des ersten Targets (6) und der erste Röntgendetektor (4) ganz innerhalb einer ersten axialen Tomographieebene liegen,b. die Anordnung eine feststehende zweite Target-Detektor-Einheit mit einem zweiten Target (7) und einem zweiten Röntgendetektor (5) aufweist, wobei die Brennfleckbahn (9) des zweiten Targets (7) und der zweite Röntgendetektor (5) ganz innerhalb einer zweiten axialen Tomographieebene mit einem festen axialen Versatz zu der ...

X-ray tube for generating X-ray radiations in computer tomography plant to perform scan process for investigation of patient, has emitter partially projecting into central aperture of control electrode and provided as curved emitter

The tube (2) has an emitter and an anode (12) generating an electron beam in operation, where the electron beam forms a focal spot on the anode. A control electrode (6) and a control unit (14) controls electron beam current. An arrangement of electrodes is positioned as an electrical diversion and focusing system (10) between the emitter and the anode. The control electrode comprises a diaphragm type central aperture. The emitter partially projects into the central aperture of the control electrode and provided as a curved emitter, a cylindrical emitter and a helical emitter. An independent claim is also included for a method for operating an X-ray tube.

EINRICHTUNG ZUR STEUERUNG DER BRENNPUNKTPOSITION IN EINER ROENTGENSTRAHLROEHRE

Rotating anode X-ray radiator for X-ray system e.g. C-arm X-ray system, has opposing coils for balancing alternating electromagnetic field of stator coil in cathode region, focus region and electron beam region

The rotating anode X-ray radiator has a stator that is provided with stator coils (6.1-6.3) for generating the alternating electromagnetic field for driving a rotor (5) arranged on a rotational axis of a rotating anode unit (3). A cathode unit (4) is provided for generating the electron beam. The opposing coils (11.1-11.3) are provided for balancing the alternating electromagnetic field of the stator coil in a specific region of the cathode unit, a focus region and an electron beam region.

High voltage electron discharge tube

... 970,279. X-ray tubes. GENERAL ELECTRIC CO. Jan. 17, 1961 [Jan. 18, 1960], No. 1900/61. Heading H1D. A high voltage electron discharge tube, e.g. an X-ray tube, has a plurality of aligned beamcontrolled electrodes 22a, 22b, 22c, Fig. 1, each resiliently supported by a structure within a single rigid elongated dielectric cylindrical envelope 35, the structure comprising pins 42 either fused within the wall of the envelope, Fig. 1, or being received within sleeves 80, Fig. 7, fused within the wall, the pins extending radially inwards to support the electrodes, the resiliency of the structure serving to absorb mechanical stresses generated in the electrodes by electric fields and heat during operation of the tube thereby to reduce stresses imparted to the envelope. Preferably, each electrode has three coplanar pins equiangularly spaced about the electrode. The pins may be connected to pin brackets 41, Fig. 4, attached to the electrode or may be sealed into sleeves attached to the electrode.

Dynamically adjustable focal spot

Apparatus and methods for generating distributed x-rays

An X-ray scanner

An X-ray scanner comprising: an X-ray source comprising a linear array of X-ray source points 802 and X-ray detection means comprising a linear array of detectors 804, wherein said linear arrays are preferably arranged substantially perpendicular to each other; and control means arranged to operate either said X-ray source points or said X-ray detectors in plurality of successive groupings. For example, the array of X-ray source points may be controlled to produce a plurality of successive illuminations, each illumination having a square wave pattern of a different wavelength (see Figs 14a-14c). The control means may apply a mathematical transform to the recorded readings from each of the array of detectors in order to reconstruct a three-dimensional image of an object being scanned. A number of electron sources suitable for use in said X-ray scanner are also disclosed (see Figures 1-4, 6-12 and 16-18).

X-ray spectrometer

An X-ray spectrometer which is arranged inside an evacuatable housing and which comprises a wavelength dependent X-ray detection system and, for irradiating the specimen to be examined, an electron source with an electron deflection system for generating an electron beam and an X-ray source for generating an X-ray beam. The X-ray source consists of an anticathode on which the electron beam can be directed by the electron deflection system in order to generate the X-ray beam.

Method and apparatus for prolonging the life of an X-ray target

SYSTEM FOR THE ADMINISTRATION OF A HIGH-ENERGY X-RAY

SNAPS DOSE MODULATING OVER Z-DEFLEKTION IN A ROTARY ANODE OR A ROTARY FRAMEWORK TUBE

Compact, ionising ray-generating source, assembly comprising a plurality of sources and method for producing the source

The invention relates to a source generating ionising rays, and in particular X-rays, an assembly comprising a plurality of sources and a method for producing the source. The ionising ray-generating source comprises: · a vacuum chamber (12), · a cathode (14) capable of emitting an electron beam (18) in the vacuum chamber (12), · an anode (16) receiving the electron beam (18) and comprising a target (20) capable of generating an ionising radiation (22) from the energy received from the electron beam (18), and · an electrode (24) arranged in the vicinity of the cathode (14) and forming a Wehnelt electrode. According to the invention, the electrode (24) is composed of a conductive surface adhering to a concave face (26) of a dielectric material.

SYSTEM AND METHOD FOR X-RAY SOURCE WEIGHT REDUCTION

The invention provides an X-ray source having a generator for generating an electron beam, an accelerator for accelerating the generated electron beam in a desired direction, one or more magnetic elements for transporting portions of the electron beam in a more than one desired direction, and a shaped target made from a material having an atomic number lying within a predetermined range of values, the transported parts of the electron beam producing a fan beam of X rays upon striking the shaped target.

X-ray generator

An electron beam corresponding to radiation intensity data is output from an electron source by supplying high energy pulses p-1 through p-n, which correspond to the radiation intensity data of a radiation field, to the electron source from a power source 108. This electron beam is deflected so as to be incident in parallel to the medial axis of a plurality of X-ray target tubes 104-1 through 104-n by a deflection means comprising electromagnets, such that X-ray beams x-1 through x-n, which are produced when the electron beam collides with an inner wall of an X-ray target tube are irradiated with a desired intensity.

X-RAY GENERATION DEVICE AND X-RAY IMAGE CAPTURE SYSTEM

An X-ray generation device includes a cathode including an electron source generating an electron beam, an anode including a target to transmit an X-ray generated by collision of the electron beam, and a convergence electrode converging the electron beam toward the target. The target has a first region having a locally small thickness and a second region having a larger thickness than the first region. The X-ray generation device further includes a deflection unit to switch an incident position of the electron beam between the first region and the second region. The deflection unit has an adjustment mode to adjust an X-ray focal spot diameter and an X-ray generation mode to generate an X-ray, the electron beam is caused to enter the first region in the adjustment mode, and the electron beam is caused to enter the second region in the X-ray generation mode. 1. An X-ray generation device comprising: a cathode including an electron source that generates an electron beam; an anode including a transmission type target configured to transmit , in an incident direction of the electron beam , an X-ray generated by collision of the electron beam; and a convergence electrode that converges the electron beam toward the transmission type target ,wherein the transmission type target has a first region having a locally small thickness and a second region having a larger thickness than the first region,wherein the X-ray generation device further comprises an electron beam deflection unit configured to switch an incident position of the electron beam to the transmission type target between the first region and the second region, andwherein the electron beam deflection unit has an adjustment mode to adjust an X-ray focal spot diameter and an X-ray generation mode to generate an X-ray, the electron beam is caused to enter the first region in the adjustment mode, and the electron beam is caused to enter the second region in the X-ray generation mode.2. The X-ray generation device ...

BLANKING OF ELECTRON BEAM DURING DYNAMIC FOCAL SPOT JUMPING IN CIRCUMFERENTIAL DIRECTION OF A ROTATING ANODE DISK OF AN X-RAY TUBE

An apparatus (210) and method for total or partial blanking of an electron beam (e) during a jump between the 2 or more positions of a dynamic focal spot (FP) movement in circumferential direction of the electron beam impinging on the focal track (FPTR) of a rotating target disk (230) of a X-ray tube (110). Alternatively the focal spot size can be increased during this short time interval. Overheating of the anode at the focal spot can be prevented.

MULTI-ENERGY X-RAY SOURCE

An apparatus for use in a radiation procedure includes a radiation filter having a first portion and a second portion, the first and the second portions forming a layer for filtering radiation impinging thereon, wherein the first portion is made from a first material having a first x-ray filtering characteristic, and the second portion is made from a second material having a second x-ray filtering characteristic. An apparatus for use in a radiation procedure includes a first target material, a second target material, and an accelerator for accelerating particles towards the first target material and the second target material to generate x-rays at a first energy level and a second energy level, respectively.

ADJUSTING DEVICE FOR VACUUM-TUBES.

Radiation sources and radiation scanning systems with improved uniformity of radiation intensity

A radiation source is disclosed comprising a source of charged particles that travel along a path. Target material lies along the path to generate radiation upon impact by the beam. A magnet is provided to deflect the beam prior to impacting the target. The magnet may generate a time-varying magnetic field or a constant magnetic field. A constant magnetic field may be varied spatially across the beam. The magnet may be an electromagnet or a permanent magnet. In one example, deflection of the beam results in impact of the beam on the target along a plurality of axes. In another example, portions of the beam are differentially deflected. The source may thereby irradiate an object to be scanned with more uniform radiation. The charged particles may be electrons or protons and the radiation may be X-ray or gamma ray radiation, or neutrons. Scanning systems incorporating such sources, methods of generating radiation and methods of examining objects are disclosed, as well.

Focal spot motion control for rotating housing and anode/stationary cathode X-ray tubes

An x-ray tube includes an anode (A) and an envelope (C). A cathode assembly (B) which is supported in the envelope on a bearing (32) emits a beam of electrons which strike the anode forming a focal spot. The anode rotates (D) relative to the cathode such that focal spot follows a generally annular path along a beveled track (14). If the axis of the anode and the cathode assembly are screwed or offset, the focal spot path is not circular and wobbles. An adjustment assembly (60) adjusts the relative positions of the anode, the cathode and the envelope to adjust the anode and cathode assembly axes. The adjustment assembly also includes one or more electrodes (102, 108) which adjust the position of the focal spot. An angular position encoder (106) identifies an angular orientation of the anode. A control circuit (110) applies an electrostatic potential to the electrodes to move the focal spot such that it stays on a constant plane of the leveled anode surface.

Method and apparatus for adaptive exposure in x-ray systems

The present invention pertains to an apparatus and method for adaptive exposure in imaging systems. An x-ray source for producing x-ray radiation and an x-ray detector for measuring amount of x-ray radiation passing through the human patient and striking the detector can be used. A tomographic image of the human patient or a tomosynthetic image of the human patient can be generated. Region of interest filtering and equalization filtering can be utilized. Filtering can be accomplished with a mechanical shield or shutter or with electronic control of the x-ray source.

X-RAY MODULE

An X-ray module includes; a housing; an electron gun that emits an electron beam inside the housing; a target disposed inside the housing and fixed to the housing, to generate an X-ray when the electron beam is incident on the target; a permanent magnet that is disposed outside the housing and deflects the electron beam by means of a magnetic force; and a heat radiating unit having a higher thermal conductivity than a thermal conductivity of the permanent magnet and thermally connected to the permanent magnet.

X-RAY TUBE HAVING MAGNETIC QUADRUPOLES FOR FOCUSING AND MAGNETIC DIPOLES FOR STEERING

СИСТЕМА ДЛЯ РЕНТГЕНОВСКОГО ОБСЛЕДОВАНИЯ СО ВСТРОЕННЫМ ПРИВОДНЫМ СРЕДСТВОМ ДЛЯ ВЫПОЛНЕНИЯ ПОСТУПАТЕЛЬНОГО И/ИЛИ ПОВОРОТНОГО ПЕРЕМЕЩЕНИЙ ФОКУСНОГО ПЯТНА, ПО МЕНЬШЕЙ МЕРЕ, ОДНОГО АНОДА, ИСПУСКАЮЩЕГО РЕНТГЕНОВСКОЕ ИЗЛУЧЕНИЕ, ОТНОСИТЕЛЬНО НЕПОДВИЖНОГО ОПОРНОГО ПОЛОЖЕНИЯ И СО СРЕДСТВОМ ДЛЯ КОМПЕНСАЦИИ ПРОИСХОДЯЩИХ В РЕЗУЛЬТАТЕ ПАРАЛЛЕЛЬНОГО И/ИЛИ УГЛОВОГО СДВИГОВ ИСПУСКАЕМЫХ ПУЧКОВ РЕНТГЕНОВСКОГО ИЗЛУЧЕНИЯ

... 1. Система рентгеновского сканера, содержащая матрицу пространственно распределенных, последовательно коммутируемых рентгеновских источников (200a/b или 300a/b), при этом упомянутые рентгеновские источники адресуются программируемой последовательностью коммутации с заданной частотой коммутации, причем каждый рентгеновский источник содержит: ! - анод (204) с плоской, испускающей рентгеновское излучение поверхностью, наклоненной под острым углом относительно плоскости, перпендикулярной направлению входного электронного пучка, падающего на упомянутый анод в положении фокусного пятна (205), и ! - по меньшей мере, один встроенный приводной блок (206, 206') для выполнения, по меньшей мере, одного поступательного и/или поворотного перемещения анода (204) относительно неподвижного опорного положения. ! 2. Система рентгеновского сканера по п.1, в которой, по меньшей мере, один встроенный приводной блок (206, 206') реализован пьезокристаллическим приводом, который вырабатывает механическое напряжение ...

X-ray tomographic inspection system for the idendification of specific target items

The present invention provides for an improved scanning process with a stationary X- ray source arranged to generate X-rays from a plurality of X-ray source positions around a scanning region, a first set of detectors arranged to detect X-rays transmitted through the scanning region, and at least one processor arranged to process outputs from the first set of detectors to generate tomographic image data. The X-ray screening system is used in combination with other screening technologies, such as NQR-based screening, X-ray diffraction based screening, X-ray back-scatter based screening, or Trace Detection based screening.

X-ray tube electron sources

SOURCES OF X-RADIATION

... 1526041 X-ray tubes EMI Ltd 29 Aug 1975 [29 Aug 1974] 37743/74 Heading H1D An X-ray tube for generating a planar fan of substantially uniform X-radiation comprises a target surface curved in the plane of the fan, which fan is substantially sideways to the general path of the electron beam, and the electrons being incident over the curved surface at substantially equal angles of incidence. Window 5 selects the required fan, and additional collimation and electrostatic focusing may be provided. The electron beam need not be circularly symmetrical but can be flat. The forward X-ray emission due to higher energy electrons may produce crossing X-ray beams in which case a fan-like array of collimators are used. The electron beam may be directed at an angle to the gun-target axis and converge with substantial positive aberration (bracket B) (Fig. 3, not shown). Beam convergence angles of 30 to 50 degrees are desirable for diagnostic radiology. Each beam is 30 degrees to the anode surface at the ...

SOURCE OF X-RAY

IMAGING SYSTEM WITH X-RAY SCANNING

SNAPS MODULATION OF A SWITCHING FOCUS X-RAY TUBE

X-RAY TUBE, X-RAY SYSTEM AND PROCEDURE FOR THE PRODUCTION OF X-RAY

X-ray source and method for generating x-ray radiation

X-RAY SOURCE AND OPERATING METHOD THEREFOR

ИМИТИРОВАННЫЙ ПРОСТРАНСТВЕННЫЙ ПРОСМОТР ОБЪЕКТА В РЕАЛЬНОМ ВРЕМЕНИ С РАЗЛИЧНЫХ ТОЧЕК НАБЛЮДЕНИЯ

Изобретение относится к имитированному пространственному просмотру объекта в реальном времени. Технический результат - обеспечение пространственной информации пользователю при пониженных требованиях, относящихся к поддержанию конкретного положения, например, относительно трехмерного дисплея, или ношения или активации дополнительных компонентов, таких как трехмерные очки. Предусмотрено формирование электронного пучка (38) от катодного узла (32) в направлении целевой области анода (34) и управление электронным пучком таким образом, что электронный пучок попадает на анод в движущемся фокусном пятне (44), причем электронным пучком управляют таким образом, что фокусное пятно движется по меньшей мере в первом направлении (46) движения, поперечном относительно направления (48) наблюдения. Таким образом, рентгеновское излучение (42) формируют посредством электронного пучка, падающего на движущееся фокусное пятно. Кроме того, предусмотрено обнаружение рентгеновского излучения, по меньшей мере частично ...

УСТРОЙСТВО РЕНТГЕНОВСКОГО ИЗЛУЧЕНИЯ И КТ-ОБОРУДОВАНИЕ, СОДЕРЖАЩЕЕ ЕГО

FIELD: physics.SUBSTANCE: device for distributed X-ray radiation with a two-dimensional matrix comprises: vacuum chamber (3) sealed around the periphery and having a high vacuum inside; several electron emission units (1) located in a plane on wall of vacuum chamber (3) with two-dimensional arrangement; anode (2) comprising anode mirrors (202) corresponding to several electron emission units (1) and made in vacuum chamber (3) so, to be parallel to plane in which several electron emission units (1) are located; and power and control system (7), comprising high-voltage power supply (702) connected to anode (2), filament power supply (704), connected to each of several electron emission units (1), grid control device (703) connected to each of several electron emission units (1), and control system (701) used to control each power supply source, wherein anode comprises anode plate (201) made from metal material and parallel to upper surfaces of electron emission units (1), and several mirrors (202) mounted on anode plate (201) and arranged to correspond to positions of blocks (1) electron emission, respectively; wherein bottom surfaces of anode mirrors (202) are connected to plate (201) of anode, and upper surfaces of mirrors (202) of anode form with preset angle plate (201) of anode.EFFECT: high stability and efficiency of detection.14 cl, 9 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 690 024 C2 (51) МПК H01J 35/06 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (52) СПК G21K 1/08 (2019.02) (21)(22) Заявка: 2016112575, 17.09.2014 (24) Дата начала отсчета срока действия патента: Дата регистрации: 30.05.2019 18.09.2013 CN 201310427174.1 (43) Дата публикации заявки: 23.10.2017 Бюл. № 30 (45) Опубликовано: 30.05.2019 Бюл. № 16 (56) Список документов, цитированных в отчете о поиске: US 2011286581 A1, 24.11.2011. US (85) Дата начала рассмотрения заявки PCT на национальной фазе: 18.04.2016 2003072407 A1, 17.04.2003. US ...

ГАШЕНИЕ ЭЛЕКТРОННОГО ПУЧКА ВО ВРЕМЯ ДИНАМИЧЕСКОГО ПЕРЕСКОКА ФОКАЛЬНОГО ПЯТНА ПО КРУГУ ВРАЩАЮЩЕГОСЯ ДИСКА АНОДА РЕНТГЕНОВСКОЙ ТРУБКИ

... 1. Устройство (210) управления рентгеновской трубкой (110), с возможностью отклонения фокальной точки, имеющей подвижный анод (230), фокальную точку (FP), образованную электронным пучком (e), падающим на анод в указанной точке, включающее:блок, регистрирующий отклонение фокальной точки (211), для регистрации отклонения фокальной точки на аноде, отклонение происходит по траектории, намеченной отклоняющейся фокальной точкой, по меньшей мере на части движущегося анода;ослабитель электронного пучка (212), выполненный с возможностью ослабления падающего электронного пучка (e), в ответ на зарегистрированное указанным способом отклонение фокальной точки, в то время как отклоняемая фокальная точка (FP) проходит по траектории (FPT) по движущемуся аноду, ослабляющее действие зависит от относительной скорости между фокальной точкой (FP) и анодом (230), причем ослабляющее действие включает в себя снижение мощности электронного пучка в виде функции квадратного корня отношения между i) минимальной относительной ...

ИСТОЧНИК РЕНТГЕНОВСКОГО ИЗЛУЧЕНИЯ, ФОРМИРУЮЩИЙ ТРЕХМЕРНЫЙ РЕНТГЕНОВСКИЙ ЛУЧ

РЕНТГЕНОВСКИЙ АНОД

... 1. Вращающийся анод для рентгеновской трубки, при этом:- анод содержит:- по меньшей мере, один первый сегмент (901; 1207), выполненный с возможностью соударения посредством первого электронного луча, чтобы формировать рентгеновские лучи с первой энергией; и- по меньшей мере, один второй сегмент (902; 1208), выполненный с возможностью соударения, по меньшей мере, посредством второго электронного луча, чтобы формировать рентгеновские лучи со второй энергией;- при этом, по меньшей мере, один первый сегмент и, по меньшей мере, один второй сегмент электрически изолированы друг от друга; и- при этом первая энергия превышает вторую энергию.2. Анод по п.1, в котором, по меньшей мере, один первый сегмент (901) является, по меньшей мере, первой частью кругового кольца анода, в котором, по меньшей мере, один второй сегмент (902) является, по меньшей мере, по меньшей мере, второй частью кругового кольца анода.3. Анод по п.1, в котором, по меньшей мере, один первый сегмент является первым круговым кольцом ...

Einrichtung zur Erzeugung tomographischer Bilder eines Körpers

Roentgenroehre mit Strahlen- und Hochspannungsschutz, bei der die Antikathode kegelfoermig ausgebildet ist und bei der die Roentgenstrahlen bei ruhender Roehre in verschiedenen Richtungen senkrecht zur Laengsachse austreten

VERFAHREN UND VORRICHTUNG ZUR BESTIMMUNG DER ELEKTRONENDICHTE IN EINEM TEILVOLUMEN

X-ray tube arrangements

A technique for ensuring the rapid correction of both amplitude and offset errors in the deflectional movement of an electron beam along an X-ray emissive target is disclosed. The movement is monitored at at least two positions during a sweep and differences, between the two movements and a desired movement, at these positions are combined in unequal proportions to produce a corrective servo signal.

X-ray scanners and x-ray sources thereof

X-RAY COMPUTER TOMOGRAPHY SYSTEM

X-ray scanners and X-ray sources therefor

DEVICE TO ROENTGEN TOMOSYNTHESE ONES

X-RAY MISSION DEVICE AND PROCEDURE FOR THE PRODUCTION OF AN ELECTRON-BEAM FOR THE PRODUCTION OF AN X-RAY IN AN X-RAY MISSION DEVICE

CATHETER WITH ROENTGEN-SENSITIVE, OPTICAL POSITIONING DEVICE

PROCEDURE AND DEVICE FOR EXTENDING THE LIFETIME OF A ROENTGEN ANODE

REMOTE FOCUS X-RAY TUBE

PHD 77-028 8-3-1978 Remote-focus X-ray tubes, in particular dental X-ray tubes, have the problem that the focus is shifted as a result of which the emission distribution changes. It has now been found that a cause of said shifting is the earth magnetic field and, sometimes, magnetic fields produced by electromagnetic elements of the apparatus. In order to eliminate these magnetic fields the anode tube is surrounded by a soft-magnetic layer which is dimensioned so that it serves at the same time as prefilter for the useful radiation emitted by the target.

DOUBLE FOCUS X-RAY TUBE

METHOD AND APPARATUS INCORPORATING NO MOVING PARTS, FOR PRODUCING AND SELECTIVELY DIRECTING X-RAYS TO DIFFERENT POINTS ON AN OBJECT

... of the Invention A method and apparatus for producing high intensity xrays and directing such x-rays toward an object of interest from a fixed target by producing a high power electron beam, selectively directing that beam by means or selectively activated electromagnetic elements having no mechanically moving parts either to preselected points on the target for production of x-rays therefrom or to an x-ray shielded beam collector positioned generally adjacent the target.

X-ray source and X-ray system

An x-ray source has multiple electron sources spaced apart from each other along a longitudinal direction that is defined as being parallel to the rotation axis of a rotating anode which is common to all of the electron sources. Each electron source emits electrons that strike the anode at respective strike points that are spatially separated from each other along the longitudinal direction, to produce respective emission centers, from which x-rays are emitted, each emission center being associated with respective ones of the x-ray sources.

УСТРОЙСТВО И СПОСОБ ПОЛУЧЕНИЯ РАСПРЕДЕЛЕННЫХ РЕНТГЕНОВСКИХ ЛУЧЕЙ

FIELD: physics. SUBSTANCE: hot cathode of the electron gun is used in a vacuum to create electron beams having a certain initial energy of motion and velocity. Periodic scanning is carried out by electron beams with initially low energy, which thus are deflected accordingly. The flow limiting device is provided on the trajectory of the electron beam passage along the direction of the corresponding deflection. Through the openings arranged in the matrix on the flow limiting device, only a portion of the electron beams aimed at specific positions can pass to form successive electron beam flows distributed in the matrix. These electron beam flows are accelerated by a high-voltage electric field to produce high energy, the anode targets are bombarded and thus sequentially the corresponding focal spots and X-rays scattered as a matrix on the anode target are created. EFFECT: simplifying the device, increasing the reliability and effectiveness of the survey. 15 cl, 8 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (13) 2 634 906 C2 (51) МПК H01J 35/00 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ ИЗОБРЕТЕНИЯ К ПАТЕНТУ (21)(22) Заявка: 2015131158, 21.11.2013 (24) Дата начала отсчета срока действия патента: 21.11.2013 Дата регистрации: Приоритет(ы): (30) Конвенционный приоритет: 27.12.2012 CN 201210581566.9 (45) Опубликовано: 08.11.2017 Бюл. № 31 (56) Список документов, цитированных в отчете о поиске: US 2012057669A1, 08.03.2012. US (85) Дата начала рассмотрения заявки PCT на национальной фазе: 27.07.2015 2004208280, 21.10.2004 . US 2012294424А1, 22.11.2012. US 5596621А, 21.01.1997. US 4024424А, 17.05.1977. US 2010260317А1, 14.10.2010 . (86) Заявка PCT: CN 2013/087608 (21.11.2013) (87) Публикация заявки PCT: 2 6 3 4 9 0 6 (43) Дата публикации заявки: 30.01.2017 Бюл. № 4 (73) Патентообладатель(и): ТСИНХУА ЮНИВЕРСИТИ (CN), НЬЮКТЕК КОМПАНИ ЛИМИТЕД (CN) R U 08.11.2017 (72) Автор(ы): ЛИ Юаньцзин (CN), ЛЮ Яохун (CN), ЛЮ Цзиньшэн (CN), ТАН Хуапин (CN), ТАН ...

УСТРОЙСТВО РЕНТГЕНОВСКОГО ИЗЛУЧЕНИЯ И КТ-ОБОРУДОВАНИЕ, СОДЕРЖАЩЕЕ ЕГО

ИМИТИРОВАННЫЙ ПРОСТРАНСТВЕННЫЙ ПРОСМОТР ОБЪЕКТА В РЕАЛЬНОМ ВРЕМЕНИ С РАЗЛИЧНЫХ ТОЧЕК НАБЛЮДЕНИЯ

... 1. Рентгеновская трубка (30) для просмотра объекта, содержащая:катодный узел (32);анод (34) исредство (36) управленияпричем катодный узел и анод выполнены с возможностью формирования электронного пучка (38) от катодного узла в направлении целевой области (40) анода для формирования рентгеновского излучения (42) посредством электронов, сталкивающихся с целевой областью; ипричем средство управления выполнено с возможностью управления электронным пучком таким образом, что электроны попадают на анод в движущемся фокусном пятне (44);причем средство управления выполнено с возможностью обеспечения движения фокусного пятна по меньшей мере в первом направлении (46) движения, поперечном относительно направления (48) наблюдения; ипри этом средство управления выполнено с возможностью обеспечения движения фокусного пятна по петлевидной траектории.2. Рентгеновская трубка по п. 1, в которой предусмотрена рентгеновская визуализация с постепенно движущимся фокусным пятном.3. Рентгеновская трубка по одному ...

БАЛАНСИРОВКА ВРАЩАЮЩЕГОСЯ АНОДА

... 1. Регулировочное устройство (54) для балансировки вращающегося анодного диска в рабочем состоянии, содержащее:- по меньшей мере, первое множество (72) балансировочных элементов (74);причем балансировочные элементы прикреплены, по меньшей мере, к одной круговой кольцевой структуре (76);причем каждый балансировочный элемент содержит балансировочный участок (80), установленный на круговой кольцевой структуре с помощью изгибаемого участка (82);причем изгибаемые участки выполнены с возможностью нагрева до температуры изгибания для обеспечения радиального поворотного движения (84) балансировочного участка из первого состояния (86) во второе состояние (88), вызванное центробежными силами при вращении; ипричем в первом состоянии центр масс балансировочного участка находится ближе к центру (90) круговой кольцевой структуры, чем во втором состоянии.2. Регулировочное устройство по п. 1, в котором в первом состоянии балансировочные элементы расположены параллельно оси (90) круговой кольцевой структуры ...

ROENTGENSPEKTROMETER

ROENTGENTOMOGRAPHIESYSTEM MIT ELEKTRONISCHER ABTASTUNG.

X-Ray tube electron sources

X-ray generator

To achieve high quality x-ray imaging it is important to be able to control the production of x-rays in an x-ray generator. This is achieved by an x-ray generator comprising an array of electron field emitters 20 for producing paths of electrons 60 and target material 30 comprising x-ray photon producing material configured to emit x-ray photons 70 in response to the incidence of produced electrons 60 upon it. An array of magnetic-field generators are used for affecting the paths of the produced electrons from the array of electron field emitters such that one or more paths 80 are divertible away from the x-ray photon producing material so as to reduce the production of x-ray photons by the said one or more paths of electrons. The generator comprising a sensing circuit 50, 110 arranged to measure the amount of electrical charge emitted by one or more electron emitters, and a controller 90 for controlling the array of magnetic-field generators in response to the amount of electrical charge ...

Improvements in and relating to x-ray tubes and apparatus including such tubes

... 868,830. X-ray film holders. GESELLSCHAFT ZUR FORDERUNG DER FORSCHUNG AN DER EIDGENOSSISCHEN TECHNISCHEN HOCHSCHULE. Nov. 21, 1958 [Jan. 22, 1958], No. 37589/58. Class 98(1) [Also in Groups XXXV and XL(a)] The collector electrode of an X-ray device 12, Fig. 1, which produces a beam symmetrically distributed throughout an angle greater than 180 degrees (see Group XL(a)) is disposed within a tubular portion 11 which may protrude into a patient's mouth so that the generated X-ray beam may pass through all the teeth and activate a film 14 on a film holder 13 disposed around the tube 11. The holder is in the form of a parabola so as to fit the sides of the jaw as shown in Fig. 2.

X-ray inspection apparatus

An X-ray inspection apparatus is provided with main detectors each for detecting the absorption amount of X-ray beams delivered from an X-ray focal point, a reference detector for detecting variations in the size or position of the X-ray focal point, and means for removing errors due to influence of the X-ray focal point variations, based on the detention result of the reference detector.

WIDE-ANGLE X-RAY SPECTROMETER WIDE-ANGLE X-RAY SPECTROMETER

Device for providing a high energy X-ray beam

The invention relates to X-ray analytical instruments (RX), more precisely a device for providing a high energy X-ray beam, typically above 4 keV, for X-ray analysis applications. The device comprises an X-ray tube with a turning anode and an X-ray lens for shaping the beam.

X-ray anode

A rotatable anode for an X-ray tube comprises a first unit (901) for being hit by a first electron beam, and at least a second unit (902) being hit by at least a second electron beam, the second unit being electrically isolated from the first. In addition, an X-ray system comprises the anode, a main cathode for generating an electron beam, and first electrical potential, and an auxiliary cathode for influencing a second electrical potential. The main cathode deflects the electron beam to heat the auxiliary cathode. Furthermore, a device determines electrical potential by detecting a point of impact of the electron beam onto the anode and/or by detecting an X-ray spectrum of radiation starting from the anode. The electron beam hits the first unit and is deflected, wherein the deflected beam hits the second unit the point of impact. The first unit and/or second unit emit radiation.

Method and apparatus for controlling X-ray exposure

The present invention pertains to an apparatus and method for adaptive exposure in imaging systems. An x-ray source for producing x-ray radiation and an x-ray detector for measuring amount of x-ray radiation passing through the human patient and striking the detector can be used. A tomographic image of the human patient or a tomosynthetic image of the human patient can be generated. Region of interest filtering and equalization filtering can be utilized. Filtering can be accomplished with a mechanical shield or shutter or with electronic control of the x-ray source.

Anode target for an x-ray tube and method for controlling the x-ray tube

Anode targets for an x-ray tube and methods for controlling x-ray tubes for x-ray systems are provided. One x-ray system includes a field-generator configured to generate a field, an electron beam generator configured to generate an electron beam directed towards a target and a voltage controller configured to control the electron beam generator to produce an electron beam at a first energy level and an electron beam at a second energy level. The x-ray system also includes a field-generator controller configured to control a field to deflect at least one of the electron beams, wherein the electron beam, at the first energy level, impinges on the target at a first contact position and the electron beam, at the second energy level, impinges on the target at a second contact position. The at the first contact position and at the second contact position is configured to filter x-rays.

X-ray generating device with electron scattering element and x-ray system

The present invention relates to X-ray generating technology in general. Providing X-ray generating device internal voltage sources or potentials may help reduce necessary feed-throughs into an evacuated envelope of an X-ray generating device. Consequently, an X-ray generating device comprising an electron scattering element is presented. According to the present invention, an X-ray generating device is provided, comprising an electron emitting element 16, an electron collecting element 20 and an electron scattering element 42. A primary electron beam 17 a is arrangeable between the electron emitting element 16 and the electron collecting element 20. The electron emitting element 16 and the electron collecting element 20 are operatively coupled for generating X-radiation 14.

X-ray tube cathode with magnetic electron beam steering

An x-ray tube cathode with magnetic electron beam steering. In one example embodiment, an x-ray tube cathode includes a cathode head and an electron emitter. The cathode head includes electrically conductive and non-magnetic material integrated with magnetic material. The cathode head defines an emitter slot in a portion of electrically conductive and non-magnetic material positioned between two portions of magnetic material. The electron emitter is positioned within the emitter slot. The electron emitter is configured to emit a beam of electrons. The beam of electrons is configured to be both focused by the electrically conductive and non-magnetic material and steered during beam formation by the magnetic material.

X-ray source and x-ray imaging apparatus

An X-ray source (10) for emitting an X-ray beam (101) is proposed. The X- ray source (10) comprises an anode (12) and an emitter arrangement (14) comprising a cathode (16) for emitting an electron beam (15) towards the anode (12) and an electron optics (18) for focusing the electron beam (15) at a focal spot (20) on the anode (12). The X-ray source (10) further comprises a controller (22) configured to determine a switching action of the emitter arrangement (14) and to actuate the emitter arrangement (14) to perform the switching action, the switching action being associated with a change of at least one of a position of the focal spot (20) on the anode (12), a size of the focal spot (20), and a shape of the focal spot (20). The controller (22) is further configured to predict before the switching action is performed, based on the determined switching action, the size and the shape of the focal spot (20) expected after the switching action. Further, the controller (22) is configured to actuate the electron optics (18) to compensate for a change of the size and the shape of the focal spot (20) induced by the switching action

Dynamically Adjustable Focal Spot

Methods for maintaining a specified beam profile of an x-ray beam extracted from an x-ray target over a large range of extraction angles relative to the target. A beam of electrons is generated and directed toward a target at an angle of incidence with respect to the target, with the beam of electrons forming a focal spot corresponding to the cross-section of the electron beam. At least one of a size, shape, and orientation of the electron beam cross-section is dynamically varied as the extraction angle is varied, and the extracted x-ray beam is collimated. Dynamically varying the size, shape or orientation of the electron beam cross-section may be performed using focusing and stigmator coils.

X-ray source and method for generating x-ray radiation

The present inventive concept relates to an X-ray source comprising: a liquid target source configured to provide a liquid target moving along a flow axis; an electron source configured to provide an electron beam; and a liquid target shaper configured to shape the liquid target to comprise a non-circular cross section with respect to the flow axis, wherein the non-circular cross section has a first width along a first axis and a second width along a second axis, wherein the first width is shorter than the second width, and wherein the liquid target comprises an impact portion being intersected by the first axis; wherein the x-ray source is configured to direct the electron beam towards the impact portion such that the electron beam interacts with the liquid target within the impact portion to generate X-ray radiation.

HIGH BRIGHTNESS X-RAY REFLECTION SOURCE

An x-ray target, x-ray source, and x-ray system are provided. The x-ray target includes a thermally conductive substrate comprising a surface and at least one structure on or embedded in at least a portion of the surface. The at least one structure includes a thermally conductive first material in thermal communication with the substrate. The first material has a length along a first direction parallel to the portion of the surface in a range greater than 1 millimeter and a width along a second direction parallel to the portion of the surface and perpendicular to the first direction. The width is in a range of 0.2 millimeter to 3 millimeters. The at least one structure further includes at least one layer over the first material. The at least one layer includes at least one second material different from the first material. The at least one layer has a thickness in a range of 2 microns to 50 microns. The at least one second material is configured to generate x-rays upon irradiation by electrons having energies in an energy range of 0.5 keV to 160 keV 1. An x-ray target comprising:a thermally conductive substrate comprising a surface; and a thermally conductive first material in thermal communication with the substrate, the first material having a length along a first direction parallel to the portion of the surface in a range greater than 1 millimeter and a width along a second direction parallel to the portion of the surface and perpendicular to the first direction, the width in a range of 0.2 millimeter to 3 millimeters; and', 'at least one layer over the first material, the at least one layer comprising at least one second material different from the first material, the at least one layer having a thickness in a range of 2 microns to 50 microns, the at least one second material configured to generate x-rays upon irradiation by electrons having energies in an energy range of 0.5 keV to 160 keV., 'at least one structure on or embedded in at least a portion of the ...

X-ray tube with gridding electrode

An X-ray tube is provided. The X-ray tube includes an electron beam source including a cathode configured to emit an electron beam. The X-ray tube also includes an anode assembly including an anode configured to receive the electron beam and to emit X-rays when impacted by the electron beam. The X-ray tube further includes a gridding electrode disposed about a path of the electron beam between the electron beam source and the anode assembly. The gridding electrode, when powered at a specific level, is configured to grid the electron beam in synchronization with planned transitions during a dynamic focal spot mode.

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

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

Apparatuses and methods for generating distributed x-rays

An apparatus and method to generate distributed x-rays. A hot cathode of an electron gun is used in vacuum to generate electron beams having certain initial movement energy and speed. Periodic scanning is performed with the initial low-energy electron beams, which are thus caused to be reciprocally deflected. A current-limiting device is provided in the travel path of the electron beams along the direction of the reciprocal deflection. Through holes arranged in an array on the current-limiting device, only part of the electron beams targeting specific positions can pass to form sequential electron beam currents distributed in an array. These electron beam currents are accelerated by a high-voltage electric field to obtain high energy, bombard an anode target, and thus sequentially generate corresponding focus spots and x-rays distributed in an array at the anode target.

BALANCING X-RAY OUTPUT FOR DUAL ENERGY X-RAY IMAGING SYSTEMS

An X-ray source () for generating X-ray radiation of first and second energy spectra is proposed, wherein the X-ray intensity imbalance between the first and second energy spectra is reduced as compared to conventional X-ray sources. The reduction of the X-ray intensity imbalance is achieved by configuring a smaller electron impact angle () onto the anode () when the higher tube voltage is applied as compared to when the lower tube voltage is applied. 1. An X-ray source for generating X-ray radiation of first and second energy spectra , the X-ray source comprising:a cathode for emitting an electron beam;an anode for converting the electron beam at least partly into X-ray radiation;electron optics configured to control an impact angle at which electrons of the electron beam impinge onto the anode;a power supply configured to apply first and second tube voltages between the cathode and the anode, the second tube voltage being higher than the first tube voltage; anda control circuitry operably coupled to the electron optics;wherein the control circuitry is configured to control the electron optics such that the electrons of the electron beam impinge at a first mean impact angle onto the anode when the first tube voltage is applied and such that the electrons of the electron beam impinge at a second mean impact angle onto the anode when the second tube voltage is applied; andwherein the second mean impact angle is smaller than the first mean impact angle.2. The X-ray source according to claim 1 , wherein the second mean impact angle at which electrons of the electron beam impinge onto the anode is less than 70 degrees.3. The X-ray source according to claim 1 ,wherein the electrons of the electron beam impinge onto a first surface section of the anode when the first tube voltage is applied and onto a second surface section of the anode when the second tube voltage is applied; andwherein the first surface section overlaps with the second surface section.4. The X-ray ...

Radiation tube and radiation imaging system using the tube

A radiation tube includes a cathode unit including an electron source, and an anode unit including a target and a shield member arranged around the target. The target is to be irradiated with electrons emitted from the electron source to emit radiation. The cathode unit and the anode unit are joined to each other via a plurality of spacers.

Apparatus for generating x-rays

The present invention relates to an apparatus ( 10 ) for generating X-rays. It is described to produce ( 210 ) with at least one power supply ( 40 ) a voltage between a cathode ( 20 ) and an anode ( 30 ). The cathode is positioned relative to the anode, and the cathode and anode are operable such that electrons emitted from the cathode interact with the anode with energies corresponding to the voltage, and wherein the electrons interact with the anode at a focal spot to generate X-rays. The at least one power supply provides ( 220 ) the cathode with a cathode current. An electron detector ( 50 ) is positioned ( 230 ) relative to the anode, and a backscatter electron signal is measured ( 240 ) from the anode. The measured backscatter electron signal is provided ( 250 ) to a processing unit ( 60 ). The processing unit determines ( 260 ) a cathode current correction and/or a correction to the voltage between the cathode and the anode, wherein the determination comprises utilization of the measured backscatter electron signal and a correlation between anode surface roughness and backscatter electron emission. The cathode current correction and/or the correction to the voltage between the cathode and the anode is provided ( 270 ) to the at least one power supply.

Beam alignment systems and method

The present disclosure relates to a downhole tool that includes a first photon flux detector disposed at a first radial position about a longitudinal axis of the downhole tool that measures a first signal indicative of an x-ray flux of the x-ray photons. The downhole tool also includes a second photon flux detector disposed at a second radial position about the longitudinal axis of the downhole tool that measures a second signal indicative of the x-ray flux of the x-ray photons. Further, the downhole tool includes a controller communicatively coupled to the first photon flux detector and the second photon flux detector that determines a condition associated with the electron beam based at least in part on a relative x-ray flux from the first photon flux detector and the second photon flux detector.

METHOD FOR CONTROLLING AN X-RAY SOURCE

A method for controlling an X-ray source configured to emit, from an X-ray spot on a target, X-ray radiation generated by an interaction between an electron beam and the target, wherein the X-ray spot is determined by the field of view of an X-ray optical system of the X-ray source. The method includes providing the target, providing the electron beam forming an electron spot on the target and interacting with the target to generate X-ray radiation, and adjusting a width and total power of the electron beam such that a maximum of the power density profile in the electron spot is below a predetermined limit, and such that a total power delivered to the target in the X-ray spot is increased. 113-. (canceled)14. A method for controlling an X-ray source configured to emit , from an X-ray spot on a target , X-ray radiation generated by an interaction between an electron beam and the target , wherein the X-ray spot is determined by the field of view of an X-ray optical system of the X-ray source , the method comprising the steps of:providing a liquid jet forming the target;providing the electron beam accelerated by an acceleration voltage, forming an electron spot focused on the target by means of a focus current, and arranged to interact with the target to generate X-ray radiation;determining a scale factor for the acceleration voltage and the focus current relating a deflection current to a displacement of the electron beam relative to the target;measuring a quantity indicative of an interaction between the electron beam and the target for a range of displacements of the electron beam;calculating a power density profile of the electron beam based on the quantity;adjusting a width and a total power of the electron beam such that a maximum of the power density profile thereby obtained in the electron spot is below a predetermined limit, and such that a total power delivered to the target in the X-ray spot is increased.15. The method according to claim 14 , wherein the ...

ANODE TARGET, RAY LIGHT SOURCE, COMPUTED TOMOGRAPHY DEVICE, AND IMAGING METHOD

An anode target, a ray light source, a computed tomography device, and an imaging method, which relate to the technical field of ray processing. The anode target comprises a first anode target, a second anode target, and a ceramic plate. The first anode target is used for enabling, by means of a first voltage carried on the first anode target, an electron beam emitted by a cathode to generate a first ray on a target spot of the first anode target. The second anode target is used for enabling, by means of a second voltage carried on the second anode target, an electron beam emitted by the cathode to generate a second tray on a target spot of the second anode. The ceramic plate is used for isolating the first anode target from the second anode target. By means of the anode target, the ray light source, the computed tomography device and the imaging method, dual-energy distributed ray imaging data can be provided and the imaging quality of a ray system can be improved. 1. An anode target , comprising:a first anode target, configured to cause, by a first voltage carried thereon, electron beams emitted from cathodes to generate first rays on target spots of the first anode target;a second anode target, configured to cause, by a second voltage carried thereon, the electron beams emitted from the cathodes to generate second rays on target spots of the second anode target; anda ceramic body, configured to isolate the first anode target from the second anode target.2. The anode target of claim 1 , further comprising:a cooling oil tube, configured to cool the first anode target and the second anode target; anda shielding layer, configured to shield the rays generated by the anode target.3. The anode target of claim 1 , wherein the ceramic body comprises metallized ceramic body.4. The anode target of claim 3 , wherein the first anode target claim 3 , the second anode target claim 3 , and the metallized ceramic body are connected by gold-copper welding.5. The anode target of ...

X-RAY GENERATOR

To achieve high quality x-ray imaging, it is important to be able to control the production of x-rays in an x-ray generator. This is achieved by an x-ray generator comprising an array of electron field emitters for producing paths of electrons, target material comprising x-ray photon producing material configured to emit x-ray photons in response to the incidence of produced electrons upon it, an array of magnetic-field generators for affecting the paths of the produced electrons from the array of electron field emitters such that one or more paths are divertable away from the x-ray photon producing material so as to reduce the production of x-ray photons by the said one or more paths of electrons, the generator further comprising a sensing circuit arranged to measure the amount of electrical charge emitted by one or more electron emitter, and a controller for controlling the array of magnetic-field generators in response to the amount of electrical charge measured. 1. An x-ray generator comprising an array of electron field emitters for producing paths of electrons , target material comprising x-ray photon producing material configured to emit x-ray photons in response to the incidence of produced electrons upon the target material , an array of magnetic-field generators for affecting the paths of the produced electrons from the array of electron field emitters such that one or more of the paths are divertable away from the x-ray photon producing material so as to reduce the production of x-ray photons by the said one or more paths of electrons , the generator further comprising a sensing circuit arranged to measure the amount of electrical charge emitted by the electron field emitters , and a controller for controlling the array of magnetic-field generators in response to the amount of electrical charge measured.2. The x-ray generator of claim 1 , wherein the controller is arranged to control one or more magnetic-field generators to thereby reduce production of x- ...

Devices having an electron emitting structure

Controlling total emission current of an electron emitting construct in an x-ray emitting device by providing a cathode, providing multiple active areas each active area having a gated cone electron source, including multiple emitter tips arranged in an array, a gate electrode, and a gate interconnect lead connected to the gate electrode, providing an x-ray emitting construct comprising an anode, the anode being an x-ray target, situating the x-ray emitting construct facing the active areas face each other, selecting a set of active areas, and activating selected active areas by conductively connecting a voltage source to their associated the gate electrode interconnect lead.

COMPACT SOURCE FOR GENERATING IONIZING RADIATION, ASSEMBLY COMPRISING A PLURALITY OF SOURCES AND PROCESS FOR PRODUCING THE SOURCE

A source for generating ionizing radiation and in particular x-rays, to an assembly includes a plurality of sources and to a process for producing the source. The source for generating ionizing radiation comprises: a vacuum chamber; a cathode that is able to emit an electron beam into the vacuum chamber; an anode that receives the electron beam and that comprises a target that is able to generate ionizing radiation from the energy received from the electron beam; and an electrode that is placed in the vicinity of the cathode and forming a wehnelt. The electrode is formed from a conductive surface adhering to a concave face of a dielectric. 2. The source according to claim 1 , wherein it comprises a mechanical part that is made from the dielectric claim 1 , and that comprises the concave face.3. The source according to claim 2 , wherein the conductive surface is formed from a metal deposit placed on the concave face.4. The source according to claim 2 , wherein the mechanical part comprises an internal face having a surface resistivity comprised between 1×10Ω·square and 1×10Ω·square.5. The source according to claim 1 , wherein the dielectric is formed from a nitride-based ceramic.6. The source according to claim 4 , wherein the surface resistivity of the internal face is obtained by depositing a semiconductor on the dielectric of the mechanical part.7. The source according to claim 4 , wherein the surface resistivity of the internal face is obtained by adding to the volume of the nitride-based ceramic a material allowing the intrinsic resistivity of the nitride-based ceramic to be decreased.8. The source according to claim 1 , wherein the cathode emits the electron beam via a field effect and in that the electrode is placed in contact with the cathode.9. The source according to claim 2 , wherein the mechanical part forms a holder of the cathode.10. The source according to claim 2 , wherein the mechanical part forms a portion of the vacuum chamber.11. The source ...

Aligning and focusing an electron beam in an x-ray source

A technique for indirectly measuring the degree of alignment of a beam in an electron-optical system including aligning means, focusing means and deflection means. To carry out the measurements, a simple sensor may be used, even a single-element sensor, provided it has a well-defined spatial extent. When practiced in connection with an X-ray source which is operable to produce an X-ray target, further, a technique for determining and controlling a width of an electron-beam at its intersection point with the target.

X-ray tube having planar emitter and magnetic focusing and steering components

An X-ray tube can include: a cathode including an electron emitter that emits an electron beam; an anode configured to receive the emitted electrons of the electron beam; a first magnetic quadrupole between the cathode and the anode; a second magnetic quadrupole between the first magnetic quadrupole and the anode; a magnetic dipole between the cathode and anode; and a power supply system operably coupled with the first magnetic quadrupole, second magnetic quadrupole, and magnetic dipole, the power supply system being configured to: produce a first focusing magnetic quadrupole field at the first magnetic quadrupole; produce a second focusing magnetic quadrupole field at the second magnetic quadrupole; and produce a steering magnetic dipole field at the magnetic dipole configured to deflect the electron beam in order to shift a focal spot of the electron beam on the anode.

Ebeam tomosynthesis for radiation therapy tumor tracking

A system for tracking tumors during radiotherapy for interleaving treatment pulses with imaging pulses is disclosed. The system includes a multisource scanning eBeam X-ray tube having a plurality of focal spots. The X-ray tube is configured to emit X-rays in a plurality of different locations on a target by sequentially emitting the X-rays to the focal spots in the plurality of focal spots. This is done such that the X-rays can be emitted to the plurality of different locations without substantially moving the X-ray tube or the target. The system further includes an imager panel configured to act as the target and configured to receive the X-rays from the focal spots of the X-ray tube. The system further includes a tomosynthesis reconstruction module configured to process output from the imager panel to construct an image.

X-ray unit

The invention relates to an X-ray unit, an X-ray system, and a method for manufacturing an X-ray system. The X-ray system comprises an X-ray unit, a cathode, and an anode. The X-ray unit comprises a vacuum tube and a magnet system. The vacuum tube is configured to encase a cathode, an anode, and a drift way for an electron beam moving between the cathode and the anode. The magnet system is configured to focus the electron beam and the magnet system is fused to the vacuum tube.

X-ray tube device

An X-ray tube device according to the present invention includes a cathode generating an electron beam, an anode generating an X-ray by collision of the electron beam from the cathode, an envelope internally housing the cathode and the anode, a magnetic field generator including a magnetic pole arranged to be opposed to the envelope, generating a magnetic field for focusing and deflecting the electron beam from the cathode to the anode, and an electric field relaxing electrode arranged between the magnetic pole and the envelope, having an outer surface having a rounded shape. Thus, the magnetic field generator can be placed closer to the envelope while a tip end of the magnetic field generator is suppressed from being a discharge start point, and hence the effect of being capable of downsizing the X-ray tube device is achieved.

X-ray diagnostic imaging apparatus, monitoring server and anomaly detection method

In order to provide an X-ray diagnostic imaging apparatus which can detect anomalies caused by factors other than wearing of a bearing of an X-ray tube, according to the present invention, there is provided an X-ray diagnostic imaging apparatus including an X-ray tube that irradiates an object with X-rays, an X-ray detector that detects X-rays having been transmitted through the object, an image creation unit that creates a medical image of the object on the basis of the output of the X-ray detector, a change amount measurement unit that measures a change amount of an X-ray focal point which is an X-ray generation point of the X-ray tube, and an anomaly detection unit that detects an anomaly in the X-ray tube on the basis of whether or not the change amount falls within a predetermined normal change range.

Electron-Beam Spot Optimization

Electron beam spot characteristics can be tuned in each x-ray tube by moving a focusing-ring along a longitudinal-axis of the x-ray tube. The focusing-ring can then be immovably fastened to the x-ray tube. An x-ray source can include an x-ray tube and a focusing-ring. The focusing-ring can at least partially encircle an electron-emitter, a cathode, an evacuated-enclosure, or combinations thereof. The focusing-ring can be located outside of a vacuum of the evacuated enclosure. The focusing-ring can adjust an electron-beam spot on a target material of the x-ray tube when moved along a longitudinal-axis extending linearly from the electron-emitter to the target material.

METHOD AND SYSTEM FOR ADJUSTING FOCAL POINT POSITION

The present disclosure relates to a method and system for adjusting a focal point position of an X-ray tube. The method may include: obtaining a first thermal capacity and a first position of a focal point of an X-ray tube; obtaining a second thermal capacity of the X-ray tube; determining a second position of the focal point the X-ray tube based on the second thermal capacity; determining a target grid voltage difference of a focusing cup of the X-ray tube based on the first position and the second position of the focal point; and adjusting the X-ray tube based on the target grid voltage difference. 120-. (canceled)21. A method implemented on at least one device including at least one processor and at least one computer-readable storage medium , the method comprising:obtaining a relationship between a thermal capacity of an anode of an X-ray tube and a grid voltage difference of a focusing cup of the X-ray tube;obtaining a working thermal capacity of the anode of the X-ray tube;determining a target grid voltage difference of the focusing cup of the X-ray tube based on the working thermal capacity and the relationship, wherein the target grid voltage difference is a difference between a first grid voltage of a first section of the focusing cup and a second grid voltage of a second section of the focusing cup; andadjusting the grid voltage difference of the focusing cup based on the target grid voltage difference.221. The method of claim , wherein the obtaining a relationship between a thermal capacity of an anode of an X-ray tube and a grid voltage difference of a focusing cup of the X-ray tube comprises:obtaining a first relationship between a position of a focal point of the X-ray tube and the thermal capacity of the anode of the X-ray tube;obtaining a second relationship between the grid voltage difference of the focusing cup of the X-ray tube and the position of the focal point; anddetermining, based on the first relationship and the second relationship, the ...

Positioning Apparatus for an Electron Beam

A positioning apparatus is provided for an electron beam of an electron tube, the apparatus including a first DC voltage circuit having a high potential difference and a second DC voltage circuit having a smaller potential difference, having in each case a first potential level and a second potential level, and a deflection module, which has two inputs and at least one deflection coil, wherein the at least one deflection coil is connected between the two inputs of the deflection module.

System And Method For Calibration Of An X-Ray Tube

A system and method for calibrating an X-ray tube is provided in which the X-ray tube includes an electronic storage medium associated with the X-ray tube on which calibration information for the X-ray tube is stored. The calibration information includes operating parameters for the focusing elements of the X-ray tube for desired focal spots, tolerance limits for variations in the focal spots and a number of gradient coefficient values corresponding to certain modulation transfer functions (MTF) for the X-ray tube that the imaging system can employ in an iterative manner to correct the operating parameters of the focusing elements to achieve the desired focal spot. This automatic iterative process significantly reduces the time required for the calibration of the X-ray tube. The system and method also employs scan sequencing to minimize the heat generated enabling the scans to be completed in a shorter amount of time than prior calibration processes. 1. A method for the calibration of an X-ray tube comprising the steps of:providing original parameters of operation for a first number of focal spots, the original parameters including values for X-ray tube voltage, X-ray tube emission, operating currents and linearized focal spot size functions and gradients therefor;operating the X-ray tube at the original parameters;determining values for any offsets in the original parameters; andupdating the original parameters to provide updated parameters for the first number of focal spots.2. The method of wherein X-ray tube includes magnetic focusing elements and wherein the original parameters include operating currents for the magnetic focusing elements.3. The method of wherein the offsets include a global magnet offset current value.4. The method of wherein the original parameters of operation are generated during production of the X-ray tube.5. The method of wherein the first number of focal spots comprises at least six focal spots.6. A method of calibrating an X-ray tube ...

High brightness x-ray absorption spectroscopy system

This disclosure presents systems for x-ray absorption fine structure (XAFS) measurements that have x-ray flux and flux density several orders of magnitude greater than existing compact systems. These are useful for laboratory or field applications of x-ray absorption near-edge spectroscopy (XANES) or extended x-ray fine absorption structure (EXFAS) spectroscopy. The higher brightness is achieved by using designs for x-ray targets that comprise a number of aligned microstructures of x-ray generating materials fabricated in close thermal contact with a substrate having high thermal conductivity. This allows for bombardment with higher electron density and/or higher energy electrons, leading to greater x-ray brightness and high flux. The high brightness x-ray source is then coupled to an x-ray reflecting optical system to collimate the x-rays, and a monochromator, which selects the exposure energy. Absorption spectra of samples using the high flux monochromatic x-rays can be made using standard detection techniques.

ELECTROMAGNETIC X-RAY CONTROL

Disclosed herein is an apparatus for electromagnetic x-ray control. The apparatus comprises a thermionic filament, positioned at a first end of a micro-focus x-ray tube and configured to generate an electron stream. The apparatus also comprises an x-ray generation target, positioned within the micro-focus x-ray tube at a second end of the micro-focus x-ray tube, opposite the first end, to receive the electron stream and to generate x-rays in response to the electron stream impinging on the x-ray generation target. The apparatus further comprises an electromagnetic field element, configured to generate an electromagnetic field that receives the electron stream and operable to vary the electromagnetic field to redirect the electron stream, within the micro-focus x-ray tube, to impinge on the x-ray generation target at variable locations on the x-ray generation target. Each one of the variable locations corresponds to a different one of multiple variations of the electromagnetic field. 1. An apparatus for electromagnetic x-ray control , comprising:a thermionic filament, positioned at a first end of a micro-focus x-ray tube and configured to generate an electron stream;an x-ray generation target, positioned within the micro-focus x-ray tube at a second end of the micro-focus x-ray tube, opposite the first end, to receive the electron stream and to generate x-rays in response to the electron stream impinging on the x-ray generation target; andan electromagnetic field element, configured to generate an electromagnetic field that receives the electron stream and operable to vary the electromagnetic field to redirect the electron stream, within the micro-focus x-ray tube, to impinge on the x-ray generation target at variable locations on the x-ray generation target, with the variable locations corresponding to different variations of the electromagnetic field.2. The apparatus of claim 1 , further comprising a focusing anode positioned to focus the electron stream within the ...

HIGH BRIGHTNESS X-RAY REFLECTION SOURCE

An x-ray target, x-ray source, and x-ray system are provided. The x-ray target includes a thermally conductive substrate comprising a surface and at least one structure on or embedded in at least a portion of the surface. The at least one structure includes a thermally conductive first material in thermal communication with the substrate. The first material has a length along a first direction parallel to the portion of the surface in a range greater than 1 millimeter and a width along a second direction parallel to the portion of the surface and perpendicular to the first direction. The width is in a range of 0.2 millimeter to 3 millimeters. The at least one structure further includes at least one layer over the first material. The at least one layer includes at least one second material different from the first material. The at least one layer has a thickness in a range of 2 microns to 50 microns. The at least one second material is configured to generate x-rays upon irradiation by electrons. 1. An x-ray target comprising:a thermally conductive substrate comprising a surface; and a thermally conductive first material in thermal communication with the substrate; and', 'at least one layer over the first material, the at least one layer comprising at least one second material different from the first material, the at least one second material configured to generate x-rays upon irradiation by electrons., 'a plurality of structures separate from one another and on or embedded in at least a portion of the surface, each of at least two structures of the plurality of structures comprising2. The x-ray target of claim 1 , wherein the first material of each of the at least two structures extends along a direction parallel to the portion of the surface by a distance in a range of 0.2 millimeter to 3 millimeters.3. The x-ray target of claim 1 , wherein the first material of each of the at least two structures extends along a direction parallel to the portion of the surface by ...

DOSE MODULATION

A method, in an embodiment, is for setting an X-ray intensity using a structured anode or a field emitter cathode or a finger-shaped cathode head. Other embodiments include an associated X-ray device, an associated single X-ray tube CT scanner, an associated dual X-ray tube CT scanner, and an associated computer program product. 1. A method for setting an X-ray intensity using a structured anode , comprising:providing an X-ray tube including a structured anode, the structured anode including a first anode microstructure and a second anode microstructure;providing, in a controller, a first X-ray intensity number according to the first anode microstructure and a second X-ray intensity number according to the second anode microstructure;determining a first X-ray intensity setpoint in the controller according to a patient undergoing an imaging scan;selecting, in the controller, the first X-ray intensity number or the second X-ray intensity number as a first setpoint X-ray intensity number, according to the first X-ray intensity setpoint determined; andaligning an electron beam of the X-ray tube to the first anode microstructure or to the second anode microstructure according to the first setpoint X-ray intensity number selected for generating the X-rays, thereby setting the X-ray intensity.2. The method of claim 1 , wherein a second X-ray intensity setpoint is determined in the controller according to the patient undergoing the imaging scan claim 1 , wherein a second setpoint X-ray intensity number is selected according to the second X-ray intensity setpoint in the controller claim 1 , and wherein the electron beam of the X-ray tube is re-aligned to the first anode microstructure or to the second anode microstructure according to the second setpoint X-ray intensity number selected.3. The method of claim 2 , wherein the electron beam is re-aligned according to the second setpoint X-ray intensity number selected within an electron beam aligning time of less than 1 s after ...

Fast dose modulation using z-deflection in a rotaring anode or rotaring frame tube

A fast dose modulation using a z-deflection in a rotating anode or a rotating frame tube, where the electron beam is deflected from a first focal spot region to a second focal spot region being formed on the anode, wherein only the electromagnetic beam generated in the first focal spot region contributes to the useful electromagnetic exposure beam, wherein the second focal spot region is designed to avoid emission of electromagnetic beams into the direction of a useful electromagnetic beam direction.

X-ray source and x-ray system

An x-ray source has multiple electron sources spaced apart from each other along a longitudinal direction that is defined as being parallel to the rotation axis of a rotating anode which is common to all of the electron sources. Each electron source emits electrons that strike the anode at respective strike points that are spatially separated from each other along the longitudinal direction, to produce respective emission centers, from which x-rays are emitted, each emission center being associated with respective ones of the x-ray sources.

X-ray source and X-ray system with such an X-ray source

Röntgenquelle (2) mit einer Mehrzahl von in einer Längsrichtung (3) voneinander beabstandeten Elektronenquellen (41...4n) und einer diesen gegenüberliegend angeordneten, sich ebenfalls in Längsrichtung (3) erstreckenden gemeinsamen Anode (8). Die von den Elektronenquellen (41...4n) ausgehenden Elektronen zur Erzeugung von separaten Emissionszentren (181...18n) treffen an in Längsrichtung (3) räumlich voneinander beabstandeten Stellen auf die Anode (8). Die Anode (8) ist um eine in Längsrichtung (3) orientierte Achse (A) drehbar. X-ray source (2) having a plurality of electron sources (41 ... 4n) spaced apart from each other in a longitudinal direction (3) and a common anode (8) arranged opposite the latter and likewise extending in the longitudinal direction (3). The electrons emanating from the electron sources (41... 4n) for producing separate emission centers (181... 18n) impinge on the anode (8) at locations spaced from one another in the longitudinal direction (3). The anode (8) is rotatable about an axis (A) oriented in the longitudinal direction (3).

使用行间自适应电磁x射线扫描的反向散射表征

本发明公开了使用行间自适应电磁x射线扫描的反向散射表征。用于在检查对象上回扫x射线束的方法和x射线源。电子束由阴极发射，而回扫控制器在阳极上规定的路径中将信号施加到束控制器，从而使从设置在可变长度的鼻部的一个顶点处的孔发射x射线束。孔可以是Rommel孔，其允许独立于光束发射的角度形成具有期望尺寸和通量的扫描x射线。扫描速率可能会在扫描过程中变化。例如，可以同时形成多个x射线束，其中，一个光束位于运输工具内，而另一个位于运输工具之外。

Characteristic x-ray producing 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。

X-ray tube

Apparatus for X-ray tomography with an electronically deflected electron beam

Vorrichtung zur Röntgentomographie mit einem elektromagnetisch abgelenkten Elektronenstrahl, bestehend aus: – einer Elektronenkanone (1), – einem Fokussierspulensystem (3), welches den Elektronenstrahl (2) bündelt, – einem elektromagnetischen Ablenksystem für ein- oder zweidimensionale Strahlauslenkung (4), welches den Elektronenstrahl (2) quer zur Elektronenstrahlachse periodisch und mit hoher Geschwindigkeit aus seiner axialen Ruhelage auslenkt, – einem Strahlungserzeugungstarget (5), welches in der Verlängerung der Achse der Elektronenkanone (1) angeordnet ist, – einem bogenförmigen oder linearen Detektorarray (9) mit vorzugsweise lückenlos aneinandergereihten Detektorelementen (10), – einem zwischen Strahlungserzeugungstarget (5) und Detektorarray (9) verbleibenden Raum zur Anordnung eines Untersuchungsobjektes (8), wobei das Untersuchungsobjekt (8) so angeordnet ist, dass es sich ganz oder teilweise in dem durch den Brennfleck (6) und die Detektorelemente (10) des Detektorarrays (9) gebildeten Strahlungsfächer befindet, – einem Vakuumgefäß (12), in dem mindestens die Elektronenkanone (1) und das Strahlungserzeugungstarget (5) angeordnet sind, – einer nachgeordneten Elektronik... Device for X-ray tomography with an electromagnetically deflected electron beam, consisting of: An electron gun (1), A focusing coil system (3) which focuses the electron beam (2), An electromagnetic deflection system for one or two-dimensional beam deflection (4), which deflects the electron beam (2) transversely to the electron beam axis periodically and at high speed from its axial rest position, A radiation generation target (5) which is arranged in the extension of the axis of the electron gun (1), An arcuate or linear detector array (9) with detector elements (10), preferably lined up without any gaps, A space remaining between the radiation generation target (5) and the detector array (9) for arranging an examination subject (8), the examination subject (8) being arranged so as ...

Anodic target for an X-ray tube and method for controlling the X-ray tube

Es sind Anodentargets für eine Röntgenröhre und Verfahren zur Steuerung von Röntgenrähren für Röntgensysteme geschaffen. Ein Röntgensystem (10) enthält einen Feldgenerator (14, 16), der eingerichtet ist, um ein Feld zu erzeugen, einen Elektronenstrahlgenerator (60), der eingerichtet ist, um einen in Richtung eines Targets gerichteten Elektronenstrahl zu erzeugen, und eine Spannungssteuereinrichtung (1228), die eingerichtet ist, um den Elektronenstrahlgenerator zu steuern, um einen Elektronenstrahl auf einem ersten Energieniveau (18) und einen Elektronenstrahl auf einem zweiten Energieniveau (20) zu erzeugen. Das Röntgensystem enthält ferner eine Feldgenerator-Steuereinrichtung auf, die eingerichtet ist, um ein Feld zu steuern, um wenigstens einen der Elektronenstrahlen abzulenken, wobei der Elektronenstrahl (22) auf dem ersten Energieniveau (18) auf das Target (28) an einer ersten Kontaktposition (24) auftrifft und der Elektronenstrahl (22) auf dem zweiten Energieniveau (20) auf das Target an einer zweiten Kontaktposition (26) auftrifft. Die erste Kontaktposition (24) und die zweite Kontaktposition (26) sind eingerichtet, um Röntgenstrahlen zu filtern. Anode targets for an X-ray tube and methods for controlling X-ray tubes for X-ray systems are created. An x-ray system (10) contains a field generator (14, 16) configured to generate a field, an electron beam generator (60) configured to generate an electron beam directed towards a target, and a voltage control device (1228) ) arranged to control the electron beam generator to generate an electron beam at a first energy level (18) and an electron beam at a second energy level (20). The x-ray system further includes a field generator controller configured to control a field to deflect at least one of the electron beams, the electron beam (22) at the first energy level (18) impinging on the target (28) at a first contact position (24) and the electron beam (22) at the second energy level (20) impinges on the target at a ...

Fast dose modulation using z-deflection in a rotaring anode or rotaring frame tube

A fast dose modulation using a z-deflection in a rotating anode or a rotating frame tube, where the electron beam is deflected from a first focal spot region to a second focal spot region being formed on the anode, wherein only the electromagnetic beam generated in the first focal spot region contributes to the useful electromagnetic exposure beam, wherein the second focal spot region is designed to avoid emission of electromagnetic beams into the direction of a useful electromagnetic beam direction.

Fast dose modulation using z-deflection in a rotating anode or rotating frame tube

A fast dose modulation using a z-deflection in a rotating anode or a rotating frame tube, where the electron beam is deflected from a first focal spot region to a second focal spot region being formed on the anode, wherein only the electromagnetic beam generated in the first focal spot region contributes to the useful electromagnetic exposure beam, wherein the second focal spot region is designed to avoid emission of electromagnetic beams into the direction of a useful electromagnetic beam direction.

Fast dose modulation using z-deflection in a rotaring anode or rotaring frame tube

一种利用旋转阳极或旋转帧管中的z偏转的快速剂量调制，其中将电子束从形成于阳极上的第一焦斑区域偏转到第二焦斑区域，其中仅第一焦斑区域中产生的电磁射束对有用的电磁曝光束有贡献，其中将第二焦斑区域设计成避免将电磁射束发射到有用的电磁射束方向的方向中。

Fast dose modulation using Z-deflection in a rotaring anode or rotaring frame tube

A fast dose modulation using a z-deflection in a rotating anode or a rotating frame tube, where the electron beam is deflected from a first focal spot region to a second focal spot region being formed on the anode, wherein only the electromagnetic beam generated in the first focal spot region contributes to the useful electromagnetic exposure beam, wherein the second focal spot region is designed to avoid emission of electromagnetic beams into the direction of a useful electromagnetic beam direction.

METHOD AND DEVICE FOR IMPLEMENTING DOUBLE ENERGY IMAGING

L'invention concerne un procédé d'imagerie médicale selon lequel une source de rayonnement (11) est commandée avec deux niveaux d'énergie pour générer successivement dans le temps - un rayonnement à un premier niveau d'énergie (E1) et - un rayonnement à un deuxième niveau d'énergie (E2) différent du premier niveau d'énergie (E1), les rayonnements (12) ainsi générés étant émis en sortie de la source (11), à travers un patient (P) ou une zone de celui-ci à imager, vers un détecteur (13), et dans lequel on bloque ou on dévie l'émission de la source (11) pendant au moins une phase intermédiaire (tmontée, tdescente) au cours de laquelle ladite source (11) passe de façon transitoire du premier au deuxième niveau d'énergie ou réciproquement. L'invention concerne également un dispositif d'imagerie médicale permettant la mise en œuvre du procédé. The invention relates to a medical imaging method according to which a radiation source (11) is controlled with two energy levels to generate successively in time - a radiation at a first energy level (E1) and - a radiation at a second energy level (E2) different from the first energy level (E1), the radiation (12) thus generated being emitted at the output of the source (11), through a patient (P) or a the latter to be imaged, towards a detector (13), and in which the emission of the source (11) is blocked or deflected during at least one intermediate phase (tapped, tdescent) during which said source (11) transiently passes from the first to the second level of energy or vice versa. The invention also relates to a medical imaging device for implementing the method.

Correction configuration for X-ray generator, correction method, X-ray imaging system, computer program, and computer-readable medium

Method and apparatus for producing and selectively directing x-rays to different points on an object

Focus detector arrangement for generating phase-contrast x-ray images and method for this

The invention relates to a focus detector arrangement of an X-ray apparatus (1) for generating projective or tomographic phase-contrast images of an examination object (7, P), wherein a bundle of coherent X-rays (Si) is generated by an anode (12) that has areas (13) of different radiation emission arranged in strips and extending parallel to the grid lines of the phase grid (G1) of the focus detector arrangement. In addition, the invention also relates to a method for generating projective or tomographic X-ray phase-contrast images of an examination object with the aid of such a focus detector arrangement, wherein a bundle of coherent radiation is generated by an anode (12) that has areas (13) of different radiation emission arranged in strips and extending parallel to the grid lines of the phase grid (G1).

Fast dose modulation using z-deflection in a rotaring anode or rotaring frame tube

A fast dose modulation using a z-deflection in a rotating anode or a rotating frame tube, where the electron beam is deflected from a first focal spot region to a second focal spot region being formed on the anode, wherein only the electromagnetic beam generated in the first focal spot region contributes to the useful electromagnetic exposure beam, wherein the second focal spot region is designed to avoid emission of electromagnetic beams into the direction of a useful electromagnetic beam direction.

Fast dose modulation using z-deflection in a rotating anode or rotating frame tube

A fast dose modulation using a z-deflection in a rotating anode or a rotating frame tube, where the electron beam is deflected from a first focal spot region to a second focal spot region being formed on the anode, wherein only the electromagnetic beam generated in the first focal spot region contributes to the useful electromagnetic exposure beam, wherein the second focal spot region is designed to avoid emission of electromagnetic beams into the direction of a useful electromagnetic beam direction.

Fast dose modulation using z-deflection in a rotaring anode or rotaring frame tube

一种利用旋转阳极或旋转帧管中的z偏转的快速剂量调制，其中将电子束从形成于阳极上的第一焦斑区域偏转到第二焦斑区域，其中仅第一焦斑区域中产生的电磁射束对有用的电磁曝光束有贡献，其中将第二焦斑区域设计成避免将电磁射束发射到有用的电磁射束方向的方向中。

X-ray generator

Wide scanning x-ray source

An imaging tube ( 12 ) includes a cathode ( 30 ) that emits an electron beam ( 32 ) and an anode ( 38 ). The anode ( 38 ) includes multiple target surfaces ( 36 ). Each of the target surfaces ( 36 ) has a focal spot that receives the electron beam ( 32 ). The target surfaces ( 36 ) generate multiple x-ray beams ( 42 ) in response to the electron beam ( 32 ). Each x-ray beam ( 42 ) is associated with one of the target surfaces ( 36 ). An x-ray imaging system ( 10 ) includes the cathode ( 30 ) and the anode ( 38 ). A controller ( 28 ) is electrically coupled to the cathode ( 30 ) and adjusts emission of the electron beam ( 32 ) on the anode ( 38 ).

Radiotherapy apparatus

本发明公开了一种放射治疗设备，属于医疗技术领域。包括：旋转机架、X射束产生组件和治疗床；所述X射束产生组件设置在所述旋转机架上，所述X射束产生组件被配置为在所述旋转机架的带动下绕所述旋转机架的旋转轴线旋转，且所述X射束产生组件用于产生在所述旋转轴线方向上偏转的X射束，其中，所述旋转机架和所述X射束产生组件在所述旋转轴线方向上固定；所述治疗床位于所述旋转机架一侧，用于承载患者，所述治疗床被配置为沿所述旋转轴线方向运动，以配合所述X射束的偏转，使所述X射束照射患者靶区。本发明使得X射束的聚焦精度不会受到放射治疗头和机架的机械运动精度的限制，提高了X射束照射在患者靶区上的聚焦精度。

X ray source for computer tomography has two targets with controlled radiation intensity and different beam angle screens to allow beam superposition

An X ray source has screens or filters (23) arranged to reduce the beam angle (14) of one electron beam (18a, b) target area (19a) compared to another (19b) so that selection of the radiation distributions (12b, 13b) can be used to match the dose to the patient cross section.

Apparatus for generating x-ray

본 발명은 엑스-레이 발생장치에 관한 것으로, 진공챔버 내에 구비된 전자총으로부터 방출되는 전자 빔을 타겟과 충돌시켜 검사대상물에 엑스-레이(X-ray)를 발생시키는 엑스-레이 발생장치에 있어서, 상기 타겟의 하부측에 구비되며, 상기 전자 빔이 상기 타겟에 충돌되기 이전에 자기장에 의해 일측 방향으로 편향시키는 적어도 하나의 타겟 편향코일부와, 상기 타겟의 특정 영역 내에 미리 설정된 편향 패턴으로 상기 전자 빔의 충돌 위치가 변경될 수 있도록 상기 타겟 편향코일부의 동작을 제어하는 제어부를 포함함으로써, 비교적 간단한 구조를 가지면서도 타겟의 사용수명을 최대한 연장할 수 있을 뿐만 아니라 엑스-레이 발생장치의 유지비용을 최대한 감소시킬 수 있는 효과가 있다. The present invention relates to an x-ray generator, and more particularly, to an x-ray generator for generating X-rays on an object to be inspected by colliding an electron beam emitted from an electron gun provided in a vacuum chamber with a target, At least one target deflection coil portion provided at a lower side of the target and deflecting the electron beam in one direction by a magnetic field before the electron beam collides with the target; And the control unit controls the operation of the target deflection coil part so that the collision position of the beam can be changed. Thus, it is possible to maximize the service life of the target while having a relatively simple structure, Can be reduced as much as possible.

X=ray tube for computer tomography

The tube includes a magnet system with spring-focus for deflecting and focusing an electron beam. The magnet system includes a carrier (5) forming a yoke (6) with four angularly offset pole projections (7,8,9,10), arranged in opposing pairs. Coils (11,12,13,14) on the carrier are arranged in two pairs between pole projections. The coils of each pair carry a common current such that the electron beam (4) can be deflected by a coil pair in a direction which is different from that of the other coil pair.

X-ray tube device

Conventionally, the magnetic field generator 4 was arranged perpendicularly to the axis O of the electron beam B. The magnetic field generator 4 of this invention is arranged so as to be inclined relative to the axis V perpendicular to the axis O of the electron beam B. Specifically, the magnetic field generator 4 is arranged so as to be inclined relative to the axis V perpendicular to the axis O of the electron beam B within the range in the cathode 2 side from the focused and deflected electron beam B. Inclination up to the anode 5 side opposite to the cathode 2 side will lead to a possibility of increasing the reduced X-ray source diameter. Thus, arranging the magnetic field generator 4 so as to be inclined within the range in the cathode side from the electron beam B may reduce the X-ray source diameter.

X-ray tube whose electron beam is manipulated synchronously with the rotational anode movement

It is described an X-ray tube (100) comprising a rotating anode (130), which is provided with a pull electrode (140). The pull electrode (140) interacts with a fixed electron source (110) in order to generate a modulated electron beam (120a, 120b). The beam modulation may be an intensity variation and/or a spatial deflection. The pull electrode (140) is mounted in a fixed position with respect to the anode (130) and rotates together therewith. The pull electrode (140) may have a hole (141) for passing the electron beam (120a). When being in front of the electron source (110), the pull electrode (140) causes a high electric field (142a) such that a strong electron beam (120a) is generated. When being not in front of the electron source (110) only a low current or a zero current electron beam (120b) is generated. However, the pull electrode (740) may also cause a radial beam deflection such that depending on the angular position of the anode (730) the position of a focal spot (721a, 721b) of the electron beam (720) is varied.

X-ray tube and a controller thereof

An X-ray tube including a vacuum vessel, a cathode and an anode fixedly disposed inside the vacuum vessel, and a rotary mechanism that rotates the vacuum vessel, where the cathode is disposed on the circumference with a rotary shaft of the rotary mechanism as its center and includes multiple cathode parts that can individually be turned ON/OFF, and where the anode includes parts opposite to the multiple cathode parts, respectively.

X-ray tube with spring focus for enlarged resolution

X-ray tube device

X-ray tube apparatus

Conventionally, the magnetic field generator was arranged perpendicularly to the axis of the electron beam. The magnetic field generator of this invention is arranged so as to be inclined relative to the plane perpendicular to the axis of the electron beam. Specifically, the magnetic field generator is arranged so as to be inclined relative to the plane perpendicular to the axis of the electron beam within the range in the cathode side from the focused and deflected electron beam. Inclination up to the anode side opposite to the cathode side will lead to a possibility of increasing the reduced X-ray source diameter. Thus, arranging the magnetic field generator so as to be inclined within the range in the cathode side from the electron beam may reduce the X-ray source diameter.

X-ray tube apparatus

Conventionally, the magnetic field generator was arranged perpendicularly to the axis of the electron beam. The magnetic field generator (4) of this invention is arranged so as to produce an asymmetric magnetic field.

X-ray emitter

Method and device for adjusting the position of the focal spot generated by a cathode ray on the anti-cathode of an X-ray tube

X-ray tube for use in radiotomography

Compensation of anode wobble for x-ray tubes of the rotary-anode type

The present invention refers to X-ray tubes of the rotary-anode type for generating a fan beam of X-rays. More particularly, the invention is concerned with a system and method for compensating a class of system-related disturbances of the focal spot position FS on a target area AT of the rotating anode RA and particularly for compensating the anode wobble in an X-ray tube XT of the aforementioned type, which occurs as a periodically wobbling inclination angle of the anode disk's rotational plane with respect to an ideal rotational plane (z = 0) which is oriented normal to the rotational axis z of the rotary shaft S on which the anode disk RA is inclinedly mounted due to an inaccuracy during its production process. For this purpose, the electron beam generated by a thermoionic or other type of electron emitter of the tube's cathode C and thus the focal spot position FS on a target area AT of the anode disk's X-ray generating surface (anode target) are steered such that the focal spot FS stays within the plane P CXB of the central X-ray fan beam CXB.

X-ray source assembly having enhanced output stability, and fluid stream analysis applications thereof

An x-ray source assembly and method of operation are provided having enhanced output stability. The assembly includes an anode having a source spot upon which electrons impinge and a control system for controlling position of the anode source spot relative to an output structure. The control system can maintain the anode source spot location relative to the output structure notwithstanding a change in one or more operating conditions of the x-ray source assembly. One aspect of the disclosed invention is most amenable to the analysis of sulfur in petroleum-based fuels.

Cathode head with focal spot control

A cathode head is provide that is suitable for use in an x-ray device that includes an anode having a target surface configured and arranged to receive electrons emitted by the cathode head. The cathode head may be constructed of magnetic or non-magnetic material and includes an emitter block carrying a filament that defines a longitudinal axis about which is disposed one or more magnetic coils. The filament is configured and arranged to emit an electron beam that defines a focal spot on the target surface of the anode. The magnetic coil, or coils, disposed about the longitudinal axis defined by the filament generate a magnetic field that enables control of the location of the focal spot on the target surface of the anode.

X-ray system with efficient anode heat dissipation

提供用于高分辨率成像应用具有提高的额定功率的X射线系统。X射线源包括至少一个集成致动器单元(206，206′，206a或206b)，用于通过相对于固定参考位置移动X射线源阳极(204，204′，204a′或204b′)的位置进行至少一个平移和/或旋转位移。这有助于克服由于焦点位置(205)阳极过热造成的功率限制。此外，可提供聚焦单元(203)和/或偏转装置(211，211a或211b)，所述聚焦单元用于使阳极的焦点(205)聚焦调整以补偿所述阳极位移导致的焦点大小的偏差，所述偏转装置用于产生电场和/或磁场使电子束(202，202a或202b)沿着与旋转阳极的位移运动方向相反的方向偏转。

Apparatus and method for magnetic control of an electron beam

An apparatus and method for an electron beam manipulation coil for an x-ray generation system includes the use of a control circuit. The control circuit includes a first low voltage source, a second low voltage source, and a first switching device coupled in series with the first low voltage source and configured to create a first current path with the first low voltage source when in a closed position. The control circuit also includes a second switching device coupled in series with the second low voltage source and configured to create a second current path with the second low voltage source when in a closed position and a capacitor coupled in parallel with an electron beam manipulation coil and positioned along the first and second current paths.

Apparatus and method for magnetic control of an electron beam

An apparatus and method for magnetic control of an electron beam includes a control circuit having a first low voltage source and a second low voltage source. The control circuit also includes a first switching device coupled in series with the first low voltage source and configured to create a first current path with the first low voltage source when in a closed position and a second switching device coupled in series with the second low voltage source and configured to create a second current path with the second low voltage source when in a closed position. The control circuit further includes a capacitor coupled in parallel with an electron beam manipulation coil and positioned along the first and second current paths and a current source circuit electrically coupled to the electron beam manipulation coil and constructed to generate an offset current in the first and second current paths.

Alignment and focusing of electron beam at X-ray source

Stereoscopic imaging

The present invention relates to an X-ray tube for stereoscopic imaging, an X- ray imaging system for stereoscopic imaging, a method for stereoscopic imaging as well as a computer program element and a computer readable medium for stereoscopic imaging. In order to provide stereoscopic imaging with improved space requirements and enhanced weight characteristics, an X-ray tube (10) for stereoscopic imaging is provided, comprising a cathode (12), an anode (14), means (16) for deflection of an electron beam, an X-ray aperture (18) with at least a first hole (20) and a second hole (22), and an envelope (24) housing the cathode and the anode. The means for deflection are adapted such that the electron beam from the cathode can be deflected such that the electron beam hits the anode in at least two stereo focal spot positions (26) separated from each other with a first distance (28) defining a stereo direction (30). The aperture is fixedly arranged inside the envelope and an X-ray beam (32) is generated at each focal spot emanating in a viewing direction (34) through one of the at least first and second holes in the aperture. The direction of the first distance is perpendicular to the viewing direction, wherein the first distance is adaptable.

X-ray tube cathode with magnetic electron beam steering

An x-ray tube cathode with magnetic electron beam steering. In one example embodiment, an x-ray tube cathode includes a cathode head and an electron emitter. The cathode head includes electrically conductive and non-magnetic material integrated with magnetic material. The cathode head defines an emitter slot in a portion of electrically conductive and non-magnetic material positioned between two portions of magnetic material. The electron emitter is positioned within the emitter slot. The electron emitter is configured to emit a beam of electrons. The beam of electrons is configured to be both focused by the electrically conductive and non-magnetic material and steered during beam formation by the magnetic material.

Emitter, electron emission method using the emitter, and X-ray tube

System and method for calibration of an X-ray tube

A system and method for calibrating an X-ray tube is provided in which the X-ray tube includes an electronic storage medium associated with the X-ray tube on which calibration information for the X-ray tube is stored. The calibration information includes operating parameters for the focusing elements of the X-ray tube for desired focal spots, tolerance limits for variations in the focal spots and a number of gradient coefficient values corresponding to certain modulation transfer functions (MTF) for the X-ray tube that the imaging system can employ in an iterative manner to correct the operating parameters of the focusing elements to achieve the desired focal spot. This automatic iterative process significantly reduces the time required for the calibration of the X-ray tube. The system and method also employs scan sequencing to minimize the heat generated enabling the scans to be completed in a shorter amount of time than prior calibration processes.

X-ray tube

An X-ray tube that may include a cathode that is configured to generate an electron beam; an anode having a cavity that has an opening; wherein the anode is configured to receive the electron beam through the opening and to emit, through the opening, in response to the receiving of the electron beam, an X-ray beam from the opening; and electron optics that are configured to direct the electron beam towards the opening following a path that outside the cavity and in a vicinity of the opening, differs from a path of propagation the X-ray beam.

Compensation of anode wobble for X-ray tubes of the rotary-anode type

For X-ray tubes of the rotary-anode type for generating a fan beam of X-rays, compensation is afforded for system-related disturbances of the focal spot position on a target area of the rotating anode, and particularly for the anode wobble in an X-ray tube, which occurs as a periodically wobbling inclination angle of the anode disk's rotational plane with respect to an ideal rotational plane, the latter being oriented normal to the rotational axis of the rotary shaft on which the anode disk is inclinedly mounted due to an inaccuracy during its production process. For this purpose, the electron beam generated by a thermionic or other type of electron emitter of the tube's cathode and thus the focal spot position on a target area of the anode disk's X-ray generating surface are steered such that the focal spot stays within the plane of the central X-ray fan beam.

X-RAYS SOURCE

Apparatus and method for magnetic control of an electron beam

本发明名称是“用于电子束的磁控制的设备和方法”。用于x射线产生系统的电子束操纵线圈的设备和方法包括控制电路(68)的使用。控制电路(68)包括第一低压源(74)、第二低压源(76)和第一开关装置(90)，所述第一开关装置(90)与第一低压源(74)串联耦合并且配置成在处于闭合位置时与第一低压源(74)创建第一电流通路(92)。控制电路还包括：第二开关装置(94)，与第二低压源(76)串联耦合，并且配置成在处于闭合位置时与第二低压源(76)创建第二电流通路(96)；以及电容器(86)，与电子束操纵线圈(62)并联耦合，并且沿第一和第二电流通路(92，96)定位。

X-ray tube device

X-ray system with efficient anode heat dissipation

提供用于高分辨率成像应用具有提高的额定功率的X射线系统。X射线源包括至少一个集成致动器单元(206，206′，206a或206b)，用于通过相对于固定参考位置移动X射线源阳极(204，204′，204a′或204b′)的位置进行至少一个平移和/或旋转位移。这有助于克服由于焦点位置(205)阳极过热造成的功率限制。此外，可提供聚焦单元(203)和/或偏转装置(211，211a或211b)，所述聚焦单元用于使阳极的焦点(205)聚焦调整以补偿所述阳极位移导致的焦点大小的偏差，所述偏转装置用于产生电场和/或磁场使电子束(202，202a或202b)沿着与旋转阳极的位移运动方向相反的方向偏转。

X-ray tube focus position adjusting method for medical x-ray recording system, involves determining deviation of actual focus position from target focus position, and correcting focus position such that deviation is reduced

The method involves determining a deviation of an actual focus position from a target focus position or a measured value, which is proportional to the deviation. The focus position is corrected such the deviation of the actual focus position from the target focus position or the measured value is reduced based on the determined deviation or the measured value. The deviation of the actual focus position from the target focus position or the measured value, is adjusted by repeated determination and correction to a value of zero.

Integral type flying spot X-ray machine

本发明公开了一种一体式飞点X光机，其包括：放射源发生装置(40)；回转准直器装置(60)；无框架扭矩电机(80)；以及冷却装置(20)。放射源发生装置(40)包括：X射线球管(53)；高压发生器(90)；内防护套筒(44)以及外套筒(43)。其中在所述X射线球管(53)一侧的阳极端盖(47)与第一阳极绝缘防护座(52)和第二阳极绝缘防护座(50)组合形成迷宫通道；所述X射线球管(53)的阴极一侧的阴极防护端盖(41)与X射线球管(53)的阴极之间设置有迷宫防护环(54)，以及在迷宫防护环(54)和阴极防护端盖(41)之间进一步设置有膨胀鼓(55)。

Compensation of anode wobble in rotating-anode x-ray tubes

FIELD: physics. SUBSTANCE: invention relates to rotating-anode X-ray tubes for generating a fan beam of X-rays. A system for measuring and compensating a recurrent deviation (Δz) of the actual position from the desired position of an electron beam focal spot (FS), said electron beam (EB) being emitted by an electron emitter of the X-ray tube cathode (C) on a target area (AT) of an X-ray tube rotary anode disk (RA), wherein said system comprises a position sensor (WS) adapted for detecting the recurrent deviation during at least one period thereof, a beam deflection unit (BD) with an integrated controller adapted for deflecting said electron beam (EB) based on the measurement results obtained from the position sensor (WS), such that the path of the electron beam focal spot describes a certain trajectory. The system is adapted for measuring and compensating a periodical wobbling of the inclination angle of an X-ray tube rotary anode disk (RA) relative to an ideal rotational plane which is oriented normal to a rotating shaft (S) on which the rotary anode disk (RA) is mounted with an inclination due to an error during the manufacturing process. The position sensor (WS) is adapted for detecting deviations of said inclination angle over the time. EFFECT: improved image quality. 13 cl, 8 dwg РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (51) МПК H01J 35/10 (11) (13) 2 529 497 C2 (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ОПИСАНИЕ (21)(22) Заявка: ИЗОБРЕТЕНИЯ К ПАТЕНТУ 2011128104/07, 01.12.2009 (24) Дата начала отсчета срока действия патента: 01.12.2009 (72) Автор(ы): БЕЛИНГ Рольф К. О. (NL) (73) Патентообладатель(и): КОНИНКЛЕЙКЕ ФИЛИПС ЭЛЕКТРОНИКС Н.В. (NL) Приоритет(ы): (30) Конвенционный приоритет: (43) Дата публикации заявки: 20.01.2013 Бюл. № 2 R U 08.12.2008 EP 08170899.2 (45) Опубликовано: 27.09.2014 Бюл. № 27 кол. 1-4, фиг.1-4. US 5469429A, H01J 35/24, 21.11.1995 , кол.6. ЕР 1087419А2, H01J 35/00, фиг.5-9, пар.0007-0015, 0033-0038 . US 2006093092A1, H05G1/52 ...

Small sources for producing ionizing radiation, assemblies with multiple sources, and processes for manufacturing sources

Apparatus and method for improved transient response in an electromagnetically controlled x-ray tube

本发明涉及用于电磁可控x射线管中的提高的瞬态响应的设备和方法。x射线管组件(14)包括真空罩(52)，其具有阴极部(56)、靶部(60)和喉道部(84)，该喉道部(84)包括不导电管(98)。该喉道部(84)具有耦合于该阴极部(56)的上游端(108)和耦合于该靶部(60)的下游端(112)。该x射线管组件(14)还包括安置在该真空罩(52)的该靶部(60)内的靶(58)，和安置在该真空罩(52)的该阴极部(56)内的阴极(54)。该阴极(54)配置成通过该喉道部(84)朝该靶(58)发射电子流(68)。

Three-dimensional beam forming X-ray source

Three dimensional beam forming X-ray source includes an electron beam generator (EBG) to generate an electron beam. A target element is disposed a predetermined distance from the EBG and positioned to intercept the electron beam. The target element is responsive to the electron beam to generate X-ray radiation. A beam former is disposed proximate to the target element and comprised of a material which interacts with the X-ray radiation to form an X-ray beam. An EBG control system controls at least one of a beam pattern and a direction of the X-ray beam by selectively varying a location where the electron beam intersects the target element to control an interaction of the X-ray radiation with the beam-former.

Compensation of anode wobble for X-ray tubes of the rotary-anode type

本发明涉及用于产生X射线扇形射束的旋转阳极型X射线管。更具体而言，本发明涉及一种系统和方法，用于补偿焦斑位置FS对旋转阳极的靶标区域的一类系统相关干扰，尤其用于补偿上述类型的X射线管XT中的阳极摆动，发生的这种摆动是阳极盘的旋转平面相对于理想旋转平面(z＝0)的周期性摆动倾斜角，理想旋转平面的取向与转轴S的旋转轴z正交，阳极盘RA由于其生产过程中不精确而倾斜安装于转轴上。为此目的，引导由管阴极C的热离子或其他类型电子发射体产生的电子束，从而引导在阳极盘的X射线产生表面(阳极靶标)上的焦斑位置FS，使得焦斑FS停留在中央X射线扇形射束CXB的平面P CXB 之内。