Radiation detector with scintillator

Disclosed herein is a radiation detector comprising: an absorption layer configured to generate a first electrical signal upon absorbing a pulse of visible light and to generate a second electrical signal upon absorbing a particle of radiation; an electronic system configured to receive a combination of the first electrical signal and the second electrical signal and configured to extract the first electrical signal from the combination of the first electrical signal and the second electrical signal.

방사선 검출기

... 제1 방향으로 연장되는 복수의 제어 라인; 상기 제1 방향으로 교차하는 제2 방향으로 연장되는 복수의 데이터 라인; 대응하는 상기 제어 라인과 대응하는 상기 데이터 라인에 전기적으로 접속되며, 광전 변환 소자를 갖는 광전 변환부; 복수의 상기 광전 변환부 상에 설치된 신틸레이터; 복수의 상기 광전 변환 소자에 전기적으로 접속된 바이어스 라인; 상기 바이어스 라인에 전기적으로 접속된 전압 생성 회로; 및 상기 바이어스 라인에 전기적으로 접속되고 방사선의 입사 개시 시에 발생하는 전압의 변화를 검출하는 방사선 입사 판정 회로;를 구비하고 있다.

Multiple energy detector

The present specification describes an improved multi-energy radiation detector. In one embodiment, the signal generated by the detection medium is converted to digital form directly at the point of signal collection. This avoids the need for power intensive high bandwidth amplifiers and analog-to-digital converters, as it integrates the sensing device and signal processing onto the same silicon substrate to reduce the number of components in the system. In one embodiment, a single photon avalanche diode (SPAD) is coupled directly to a threshold detector to achieve an intrinsically low power and low noise detector.

RADIATION DETECTOR FOR SIMULTANEOUSLY DETECTING A PLURALITY OF RADIATIONS

A system (102) for detecting radiations includes an array of detectors (106) for receiving the radiations and an integrated circuit (IC) (108). Each detector detects a specific type of radiation and generates a corresponding detector output signal. The IC receives the corresponding detector output signal from each detector and generates an output signal that is indicative of detecting the radiations. The array of detectors is implemented using at least one of a silicon technology and a thin film technology. The IC is implemented using at least one of a complementary metal oxide semiconductor (CMOS) technology and the thin film technology.

PHOTON COUNTING DETECTOR AND PHOTON COUNTING METHOD

The present invention relates to a photon counting detector comprising a scintillator (10, 20) configured to convert incident gamma radiation into optical photons; a pixelated photodetector (11, 22) configured to detect the flux of optical photons wherein the pixelated photodetector (22) is a silicon photomultiplier, SiPM, detector, wherein each photodetector pixel comprises an array of silicon avalanche photo diodes, SPADs; and circuitry (80, 90) configured to heat SPADs by applying, if dark count rate of a SPAD exceeded a dark count rate threshold, an elevated reverse bias voltage to the SPAD to force the SPAD into breakdown with current flowing through the SPAD for the time of a heating period, and controlling the length of the heating period.

Modular pet detector comprising a plurality of modular one-dimensional arrays of monolithic detector sub-modules

A gamma-ray detector includes a plurality of modular one-dimensional arrays of monolithic detector sub-modules. Each monolithic detector sub-module includes a scintillator layer, a light-spreading layer, and a photodetector layer. The photodetector layer comprises a two-dimensional array of photodetectors that are arranged in columns and rows. A common printed circuit board is electrically coupled to the two-dimensional array of photodetectors of the plurality of modular one-dimensional arrays of monolithic detector sub-modules of a corresponding modular one-dimensional array. The two-dimensional array of photodetectors can be electrically coupled in a split-row configuration or in a checkerboard configuration. The two-dimensional array of photodetectors can also have a differential readout.

STEUERVERFAHREN FÜR EINE LICHTEMPFINDLICHE EINRICHTUNG

Multiple Energy Detector

The present specification describes an improved multi-energy radiation detector. In one embodiment, the signal generated by the detection medium is converted to digital form directly at the point of signal collection. This avoids the need for power intensive high bandwidth amplifiers and analog-to-digital converters, as it integrates the sensing device and signal processing onto the same silicon substrate to reduce the number of components in the system. In one embodiment, a single photon avalanche diode (SPAD) is coupled directly to a threshold detector to achieve an intrinsically low power and low noise detector.

PHOTON COUNTING DETECTOR AND PHOTON COUNTING METHOD

The present invention relates to a photon counting detector and method. The detector (20) comprises a scintillator (21) configured to convert incident gamma radiation into optical photons, a pixelated photodetector (22) configured to detect the flux of optical photons, and circuitry (23). The circuitry (23) is configured to iteratively determine, per photodetector pixel, a photon count by accumulating the number of optical photons detected by the respective photodetector pixel during an integration time, assign the photon count, per photodetector pixel, to one of multiple energy bins by use of energy thresholds separating the multiple energy bins, and dynamically adapt, per photodetector pixel or group of photodetector pixels, the energy thresholds for use in a subsequent iteration based on information on the estimated photon count of said photodetector pixel or group of photodetector pixels in the subsequent iteration.

Multiple energy detector

Röntgendetektor und/oder Gammadetektor mit Lichtbias

Die Erfindung betrifft einen Detektor für Röntgen- und/oder Gammastrahlung, umfassend mindestens eine Strahlungsquelle und mindestens eine Zwischenschicht bei einer Elektrode, wobei durch die entsprechende Anordnung eine Neutralisierung von Fallenzuständen an der Elektrode und Anstiegs und Abklingzeiten im Millisekundenbereich, wie sie für die Anwendung benötigt werden, erzielt werden können, sowie ein Verfahren zur Herstellung des Detektors.

RADIOLOGICAL DETECTOR STRUCTURE

A portable radiological cassette includes a scintillator, a photosensitive slab, the scintillator and the photosensitive slab forming a panel, the panel having a front face intended to receive the incident x-ray and a rear face opposite the front face, an electronic circuit board, a mechanical protection housing, wherein the panel and the electronic circuit board are disposed, comprising a top face and a bottom face; wherein the top face of the mechanical protection housing comprises: a first layer of rigid material, a second layer of rigid material, the second layer of rigid material being in contact with the front face of the panel, a layer of cellular material disposed between the first and the second layers of rigid material. 2. The portable radiological cassette according to claim 1 , wherein the layer of cellular material is made of expanded material.3. The portable radiological cassette according to claim 1 , wherein the layer of cellular material comprises a stack of at least partially hollow tubes extending substantially at right angles with respect to the front face of the panel.4. The portable radiological cassette according to claim 1 , wherein the layer of cellular material comprises a multitude of beads.5. The portable radiological cassette according to claim 4 , wherein the beads are hollow.6. The portable radiological cassette according to claim 1 , wherein the second layer of rigid material is glued to the front face of the panel.7312123. The portable radiological cassette according to claim 1 , wherein the layer of cellular material is defined by a third thickness (e) and the first and the second layers of rigid material are respectively defined by a first thickness and a second thickness (e claim 1 , e) claim 1 , the first thickness and second thickness (e claim 1 , e) being smaller than the third thickness (e) of the layer of cellular material.8. The portable radiological cassette according to claim 1 , wherein the layer of cellular material is ...

X-RAY DEVICE AND SENSING PANEL

An X-ray device including a sensing panel and a scintillator layer is provided. The sensing panel includes a substrate and a first pixel. The first pixel is disposed on the substrate and includes a first light sensing component and a first switch component. The first switch component is disposed on the first light sensing component. The scintillator layer is disposed on the sensing panel, and the first switch component is disposed between the scintillator layer and the first light sensing component.

Röntgendetektorvorrichtung und Verfahren zum Betrieb einer Röntgendetektorvorrichtung

Die Erfindung betrifft eine Röntgendetektorvorrichtung (1), aufweisend- eine Konvertereinheit (3), ausgebildet eintreffende Röntgenstrahlung in elektrische Signale umzuwandeln,- eine Auswerteeinheit (7) mit einer Vielzahl an Auswertepixelelementen (5), jeweils aufweisend eine pixelweise Auswerteelektronik, ausgebildet in die Auswerteelektronik eingespeiste elektrische Signale zu verarbeiten, wobei die Vielzahl an Auswertepixelelementen (5) in eine erste Gruppe (50) und in eine zweite Gruppe (60) an Auswertepixelelementen (5) unterteilbar ist, und wobei lediglich die erste Gruppe (50) an Auswertepixelelementen (5) eine signaltechnische Kopplung (19) mit der Konvertereinheit (3) zur Einspeisung der in der Konvertereinheit (3) erzeugten elektrischen Signale aufweist, und- eine Ermittlungseinheit (9), ausgebildet eine elektronische Messeigenschaft zumindest einer der pixelweisen Auswerteelektroniken der Auswertepixelelemente (5) der zweiten Gruppe (60) zu ermitteln und darauf basierend einen ...

ACTIVE PIXEL SENSOR AND FLAT PANEL DETECTOR

The present disclosure provides an active pixel sensor and a flat panel detector. The active pixel sensor includes: a light sensing device configured to convert light sensed by the light sensing device into charges and supply the charges to a floating diffusion node; an amplification sub-circuit configured to amplify a signal according to a potential at the floating diffusion node and output the amplified signal through the output terminal; an adjustment sub-circuit configured to adjust, in response to a first control signal, a conversion gain from an amount of the light sensed by the light sensing device to the potential at the floating diffusion node; and a read sub-circuit configured to transmit a voltage of the input terminal of the read sub-circuit to the output terminal of the read sub-circuit according to a scan signal provided by the scan line.

RADIOGRAPHY APPARATUS

A radiography apparatus includes a substrate on which a pixel region in which a plurality of pixels that accumulate charges generated in response to incident radiations are arranged is formed on one surface of a flexible base material, a housing which accommodates the substrate and includes a front portion having an incident surface through which the radiations are incident on the substrate, a first buffer layer which is disposed between the front portion and the substrate in a thickness direction of the housing, the first buffer layer having an outer circumference provided inside the pixel region of the substrate in a plan view, and a structure which is disposed between the front portion and the substrate in the thickness direction at a position overlapping with the first buffer layer. 1. A radiography apparatus comprising:a substrate on which a pixel region in which a plurality of pixels that accumulate charges generated in response to incident radiations are arranged is formed on one surface of a flexible base material;a housing which accommodates the substrate and includes a front portion having an incident surface through which the radiations are incident on the substrate;a first buffer layer which is disposed between the front portion and the substrate in a thickness direction of the housing, the first buffer layer having an outer circumference provided inside the pixel region of the substrate in a plan view; anda structure which is disposed between the front portion and the substrate in the thickness direction at a position overlapping with the first buffer layer.2. The radiography apparatus according to claim 1 ,wherein the first buffer layer is joined to a substrate side via a joining member formed in a frame shape along the outer circumference.3. The radiography apparatus according to claim 1 ,wherein the first buffer layer is held on a substrate side, andthe structure is held on a housing side.4. The radiography apparatus according to claim 1 ,wherein a ...

Radiation detector comprising a reinforcement substrate, radiographic imaging device, and manufacturing method

A radiation detector including: a substrate formed with plural pixels that accumulate electrical charges generated in response to light converted from radiation in a pixel region at an opposite-side surface of a base member to a surface including a fine particle layer; the base member being flexible and is made of resin and that includes a fine particle layer containing inorganic fine particles having a mean particle size of from 0.05 μm to 2.5 μm, a conversion layer provided at the surface of the base member provided with the pixel region and configured to convert the radiation into light; and a reinforcement substrate provided to at least one out of a surface on the substrate side of a stacked body configured by stacking the substrate and the conversion layer, or a surface on the conversion layer side of the stacked body.

X-RAY DETECTOR

방사선 검출기

... 본 실시 형태에 관한 방사선 검출기는 제1 방향으로 연장되는 복수의 제어 라인; 상기 제1 방향에 직교하는 제2 방향으로 연장되는 복수의 데이터 라인; 상기 복수의 제어 라인과, 상기 복수의 데이터 라인에 의해 구획된 복수의 영역 각각에 설치된 광전 변환부; 상기 복수의 광전 변환부가 설치된 영역의 외측에 나란히 설치된 복수의 노이즈 검출부; 및 상기 복수 광전 변환부가 설치된 영역 위에 설치된 신틸레이터를 구비하고 있고, 상기 복수의 광전 변환부 각각은, 대응하는 상기 제어 라인과 대응하는 상기 데이터 라인에 전기적으로 접속된 제1 박막 트랜지스터와 상기 제1 박막 트랜지스터와 전기적으로 접속된 전극을 갖는 광전 변환 소자를 갖고 있고, 상기 복수의 노이즈 검출부의 각각은, 대응하는 상기 제어 라인과 대응하는 상기 데이터 라인에 전기적으로 접속된 제2 박막 트랜지스터와 상기 제2 박막 트랜지스터와 전기적으로 접속된 용량부를 갖고 있으며, 상기 제1 방향 및 상기 제2 방향 중 적어도 어느 한 방향에 있어서, 상기 용량부의 길이는 상기 전극의 길이보다 짧다.

METHOD AND DEVICE FOR THE MEASUREMENT OF HIGH DOSE RATES OF IONIZING RADIATION

A method is provided for determining the dose rate {dot over (H)} of nuclear radiation field, namely a gamma radiation field, with a radiation detection system (RDS), comprising a scintillator, a photodetector, an amplifier and a pulse measurement electronics. The pulse measurement electronics includes a sampling analog to digital converter, where the nuclear radiation deposes at least some of its energy in the scintillator, thereby producing excited states in the scintillation material, with the excited states decaying thereafter under emission of photons with a decay time τ. Photons are absorbed by the photodetector under emission of electrons, those electrons forming a current pulse, said current pulse being amplified so that the resulting current signal can be processed further in order to determine the charge of the pulse measured. 2. The method of claim 1 , the scintillator used comprising an inorganic scintillation material.3. The method of claim 1 , the amplifier used being selected from a group of Photomultiplier Tube (PMT) and Electron Multiplier.4. The method of using a RDS where the photodetector and the amplifier are combined in one device claim 1 , selected from a group of Avalanche Photo Diode and Silicon Photomultiplier.5. The method of claim 1 , whereby the pulse measurement electronics is coupled to the amplifier output via AC-coupling.6. The method of claim 1 , whereby the pulse measurement electronics is coupled to the amplifier output via DC-coupling.7. A radiation detection system (RDS) claim 1 , comprising a scintillator claim 1 , a photodetector claim 1 , an amplifier and a pulse measurement electronics claim 1 , said pulse measurement electronics including an analog to digital converter claim 1 , where the nuclear radiation deposes at least some of its energy in the scintillator claim 1 , thereby producing excited states in the scintillation material claim 1 , said excited states decaying thereafter under emission of photons with a decay ...

Radiographic imaging device

This radiation image capturing device is provided with: a sensor substrate including a flexible base material and a plurality of pixels that accumulates electrical charges generated by radiation; a flexible first cable having one end electrically connected to a connection region; a first circuit substrate which is electrically connected to the other end of the first cable and on which is mounted a first circuit unit that is electrically connected to the other end of the first cable and that is operated when reading the electrical charges accumulated in the plurality of pixels.

방사선 검출기

... 본 실시 형태에 관한 방사선 검출기는 하우징과; 상기 하우징의 내부에 설치되고, 방사선을 직접적 또는 신틸레이터와 협동하여 검출하는 복수의 검출부를 갖는 어레이 기판과; 상기 하우징의 내부에 설치되고, 상기 어레이 기판과 전기적으로 접속된 회로 기판과; 상기 하우징의 내부이며, 상기 회로 기판에 설치된 막 형상의 그라운드와, 상기 하우징에 설치되고 도전성을 갖는 판 형상체와의 사이에 설치된 도전부;를 구비하고 있고, 상기 도전부는 도전성을 갖고, 상기 그라운드의 재료보다 부드러운 재료를 포함하고 있다.

X-Ray Detecting Panel, Manufacturing Method Thereof and X-Ray Detecting Device

The present disclosure provides an X-ray detecting device, and a manufacturing method of an X-ray detecting panel. The present disclosure also provides an X-ray detecting panel including a main bias voltage signal line and a photodiode. A cathode of the photodiode is electrically connected to the main bias voltage signal line. The X-ray detecting panel further includes at least one auxiliary bias voltage signal line electrically connected to the main bias voltage signal line.

RADIATION DETECTOR

According to one embodiment, a radiation detector includes a base body, a first radiation detection element, and a second radiation detection element. The base body includes a first surface. The first surface includes first and second partial regions. A first direction from the first partial region toward the second partial region is along the first surface. The first radiation detection element is fixable to the first partial region. The second radiation detection element includes a first detecting part fixable to the second partial region. The first detecting part includes first and second end portions. A second direction from the first end portion toward the second end portion crosses the first surface. The second end portion is between the first end portion and the second partial region in the second direction. The first radiation detection element does not overlap the first end portion in the first direction. 1. A radiation detector , comprising:a base body including a first surface, the first surface including a first partial region and a second partial region, a first direction from the first partial region toward the second partial region being along the first surface;a first radiation detection element fixable to the first partial region; anda second radiation detection element including a first detecting part fixable to the second partial region,the first detecting part including a first end portion and a second end portion,a second direction from the first end portion toward the second end portion crossing the first surface,the second end portion being between the first end portion and the second partial region in the second direction,the first radiation detection element not overlapping the first end portion in the first direction.2. The detector according to claim 1 , whereinthe first radiation detection element is recessed in the second direction referenced to the first end portion.3. The detector according to claim 1 , whereinthe base body further ...

RADIATION DETECTOR WITH SCINTILLATOR

Semiconductor device and method of driving the same

To provide a semiconductor device and a driving method of the same that is capable of enlarging a signal amplitude value as well as increasing a range in which a linear input/output relationship operates while preventing a signal writing-in time from becoming long. The semiconductor device having an amplifying transistor and a biasing transistor and the driving method thereof, wherein an electric discharging transistor is provided and pre-discharge is performed.

RADIATION DETECTOR WITH QUANTUM DOT SCINTILLATOR

Disclosed herein is a radiation detector comprising: a layer of quantum dots configured to emit a pulse of visible light upon absorbing a radiation particle; an electronic system configured to detect the radiation particle by detecting the pulse of visible light.

PARTICLE INDUCED RADIOGRAPHY SYSTEM

The invention is related to particle induced radiography system, comprising a particle radiation source device, implant module, external detector device, central module and other controls, in which the implant module comprises active and/or passive components in tandem with the readout electronics and communication chosen to measure the beam properties and to generate and detect secondary gamma photons from the nuclear interactions, the external detector device provides a position sensitive gamma detector with a high detection efficiency, good spatial resolution and a relatively large field of view necessary for particle treatments useful in monitoring both the implanted device and the patient anatomical areas under treatment, and the external detector device can also be used to perform 3D spectral imaging on any material samples using proton beam as a probe.

PHOTON COUNTING DETECTOR AND PHOTON COUNTING METHOD

The present invention relates to a photon counting detector and method. The detector comprises a scintillator (21) configured to convert incident gamma radiation into optical photons; a pixelated photodetector (20, 30) configured to detect the flux of optical photons wherein the pixelated photodetector is a silicon photomultiplier, SiPM, detector, wherein each photodetector pixel comprises an array of silicon avalanche photo diodes, SPADs; and circuitry (23, 90) configured to carry out, per photodetector pixel, the steps of controlling a stop timing at which one or more functions of the photodetector pixel are stopped; determining a first photon count by accumulating the number of optical photons detected by the SPADs of the respective photodetector pixel from the start of an integration period up to the stop timing; and estimating a second photon count based on the first photon count and the stop timing, the second photon count representing an estimate of the photon count for the total ...

Semiconductor Device and Method of Driving the Same

To provide a semiconductor device and a driving method of the same that is capable of enlarging a signal amplitude value as well as increasing a range in which a linear input/output relationship operates while preventing a signal writing-in time from becoming long. The semiconductor device having an amplifying transistor and a biasing transistor and the driving method thereof, wherein an electric discharging transistor is provided and pre-discharge is performed.

Multiple energy detector

The present specification describes an improved multi-energy radiation detector. In one embodiment, the signal generated by the detection medium is converted to digital form directly at the point of signal collection. This avoids the need for power intensive high bandwidth amplifiers and analog-to-digital converters, as it integrates the sensing device and signal processing onto the same silicon substrate to reduce the number of components in the system. In one embodiment, a single photon avalanche diode (SPAD) is coupled directly to a threshold detector to achieve an intrinsically low power and low noise detector.

X-ray detector comprising at least one light emitting layer

An X-ray detector comprises a first scintillator layer, a second scintillator layer, a first photodiode array, a second photodiode array, and at least one light emitting layer. The first scintillator layer is configured to absorb X-rays from an X-ray pulse and emit light. The first photodiode array is positioned adjacent to the first scintillator layer and is configured to detect at least some of the light emitted by the first scintillator layer. The second scintillator layer is configured to absorb X-rays from the X-ray pulse and emit light. The second photodiode array is positioned adjacent to the second scintillator layer and is configured to detect at least some of the light emitted by the second scintillator layer. The at least one light emitting layer is configured to emit radiation such that at least some of the emitted radiation irradiates the first photodiode array, and at least some of the emitted radiation irradiates the second photodiode array.

RADIATION IMAGING APPARATUS, RADIATION IMAGING SYSTEM, AND CONTROL METHOD FOR RADIATION IMAGING APPARATUS

A radiation imaging apparatus includes a detection unit that detects radiation applied by a radiation generating apparatus, an automatic exposure control unit that determines whether to stop application of radiation based on an accumulated dose of the detected radiation and to notify the radiation generating apparatus of an instruction to stop the application of radiation in a case where it is determined to stop the application of radiation, a plurality of memories, and a memory control unit that stores, in a first memory from among the plurality of memories, data to be used when the automatic exposure control unit makes the determination.

RADIATION COUNTING DEVICE AND METHOD OF CONTROLLING RADIATION COUNTING DEVICE

A radiation counting device is provided that includes a scintillator, a pixel circuit, and an analog-to-digital conversion circuit. In the radiation counting device, the scintillator generates a photon when radiation is incident. In the radiation counting device, the pixel circuit converts the photon into charge, stores the charge over a predetermined period, and generates an analog voltage in accordance with the amount of stored charge. In the radiation counting device, the analog-to-digital conversion circuit converts the analog voltage into a digital signal in a predetermined quantization unit less than the analog voltage generated from the one photon.

High Speed Two-Dimensional Event Detection and Imaging Using an Analog Interface and a Massively Parallel Processor

A quantitative pulse count (event detection) algorithm with linearity to high count rates is accomplished by combining a high-speed, high frame rate camera with simple logic code run on a massively parallel processor such as a GPU or a FPGA. The parallel processor elements examine frames from the camera pixel by pixel to find and tag events or count pulses. The tagged events are combined to form a combined quantitative event image.

RADIATION DETECTION APPARATUS

The present technology relates to a radiation detection apparatus that makes it possible to obtain a projection image of a radiation in a short period of time. The radiation detection apparatus includes a scintillator that emits scintillation light in response to incidence of a radiation, a pixel substrate on which a plurality of pixels each of which photoelectrically converts the scintillation light and outputs a pixel signal according to a light amount of the scintillation light is disposed in an array, a detection circuit substrate that includes an A/D (Analog to Digital) conversion unit for A/D converting the pixel signal and is stacked on the pixel substrate, and a compression unit that compresses digital data outputted from the A/D conversion unit. The present technology can be applied, for example, to an X-ray imaging apparatus that detects an X-ray to perform imaging and so forth.

Radiation imaging apparatus

A radiation imaging apparatus includes pixels arranged to form pixel rows and pixel columns. The pixels include first pixels and second pixels whose sensitivity to radiation is lower than the first pixels. The apparatus further includes a signal lines arranged to correspond to the pixel columns, a readout circuit configured to read out a signal from the pixels via the signal lines, and a processing unit configured to decide a correction value using signals read out from the second pixels and correct signals read out from the first pixels using the correction value. An internal structure of the readout circuit has a period. The second pixels are arranged such that there are two or more types of remainders of column numbers of pixel columns that include the second pixels divided by the period.

X-ray detecting panel comprising a photodiode, a main bias voltage signal line, and an auxiliary bias voltage signal line, X-ray detecting device, and manufacturing method thereof

The present disclosure provides an X-ray detecting device, and a manufacturing method of an X-ray detecting panel. The present disclosure also provides an X-ray detecting panel including a main bias voltage signal line and a photodiode. A cathode of the photodiode is electrically connected to the main bias voltage signal line. The X-ray detecting panel further includes at least one auxiliary bias voltage signal line electrically connected to the main bias voltage signal line.

RADIATION IMAGING APPARATUS

A radiation imaging apparatus includes pixels arranged to form pixel rows and pixel columns. The pixels include first pixels and second pixels whose sensitivity to radiation is lower than the first pixels. The apparatus further includes a signal lines arranged to correspond to the pixel columns, a readout circuit configured to read out a signal from the pixels via the signal lines, and a processing unit configured to decide a correction value using signals read out from the second pixels and correct signals read out from the first pixels using the correction value. An internal structure of the readout circuit has a period. The second pixels are arranged such that there are two or more types of remainders of column numbers of pixel columns that include the second pixels divided by the period.

READ NETWORK TOPOLOGY

RADIATION IMAGING APPARATUS

A radiation imaging apparatus includes pixels arranged to form pixel rows and pixel columns. The pixels include first pixels and second pixels whose sensitivity to radiation is lower than the first pixels. The apparatus further includes a signal lines arranged to correspond to the pixel columns, a readout circuit configured to read out a signal from the pixels via the signal lines, and a processing unit configured to decide a correction value using signals read out from the second pixels and correct signals read out from the first pixels using the correction value. An internal structure of the readout circuit has a period. The second pixels are arranged such that there are two or more types of remainders of column numbers of pixel columns that include the second pixels divided by the period. 1. A radiation imaging apparatus comprising:a plurality of pixels arranged to form a plurality of pixel rows and a plurality of pixel columns, the plurality of pixels including a plurality of first pixels and a plurality of second pixels whose sensitivity to radiation is lower than the plurality of first pixels;a plurality of signal lines arranged to correspond to the plurality of pixel columns;a readout circuit configured to read out a signal from the plurality of pixels via the plurality of signal lines; anda processing unit configured to decide a correction value using a plurality of signals read out from the plurality of second pixels and correct a plurality of signals read out from the plurality of first pixels using the correction value, whereinan internal structure of the readout circuit has a period, andthe plurality of second pixels are arranged such that there are two or more types of remainders of column numbers of pixel columns that include the plurality of second pixels divided by the period.2. The radiation imaging apparatus according to claim 1 , wherein the plurality of pixel columns includes a pixel column that includes one or more of the plurality of first ...

RADIATION IMAGING APPARATUS AND MANUFACTURING METHOD OF SAME

A method of manufacturing a radiation imaging apparatus includes electrically connecting a first surface of a flexible insulating layer to a conductive portion of a circuit substrate, covering an exposed portion of the conductive portion with a protection layer, and separating the flexible insulating layer from a substrate in contact with a second surface of the flexible insulating layer. The circuit substrate includes an integrated circuit mounted on the circuit substrate. The flexible insulating layer includes, on the first surface, a plurality of pixels arranged in a two-dimensional matrix to convert radiation into an electrical signal. The second surface of the flexible insulating layer is opposite to the first surface of the flexible insulating layer. The flexible insulating layer is separated from the substrate by irradiating the second surface with light transmitting through the substrate.

SYSTEM AND METHOD FOR IMAGING BY GAMMA RADIATION DETECTION

A system and method for imaging by gamma radiation detection having at least one processing unit analyzing at least one signal provided by at least one set of detection modules mounted on a frame and including, on the one hand, at least one module of Compton camera type having a field of view directed towards a volume delimited by the frame and, on the other hand, at least one pair of coincidence detection PET modules, diametrically opposite to each other on the frame and defining an imaging axis, the processing unit analyzing the signal derived from the Compton-type module to determine the intersection of the imaging axis with the field of view and to determine the optimal orientations and/or locations of the various detection modules on the frame so that the imaging axis passes through the source of the gamma radiation in the object to be imaged. 1. A system for imaging by gamma radiation detection comprising at least one processing unit analyzing at least one signal provided by at least a set of detection modules (CP , P) mounted on at least a frame , each of the modules comprising at least one scintillator emitting photons , when subjected to the influence of said gamma radiation , at least one photo-detector generating said signal (S) in response to said photons emitted by said scintillator and at least one acquisition device which collects said signal to transmit it to said processing unit , the system wherein:said frame comprises a plurality of locations distributed along at least one portion of two spherical caps facing each other and defining an imaging volume inside the system, said caps being separated by a distance (D) that allows accommodating an object (O) to be imaged in said volume;said frame being open, on at least one side between the two caps, so as to leave free access to said object (O) to be imaged in said volume;{'b': '1', 'said set of detection modules (CP, P) includes at least one module of Compton camera type, having a field of view (CV) ...

PHOTODETECTOR

A photodetector includes: a photoreceptor provided with a SPAD that is configured to respond to incidence of a photon, and as the response of the SPAD, configured to output a pulse signal; and a pulse rate control circuit configured to control sensitivity of the photoreceptor to have a pulse rate as the number of pulse signals outputted per unit time from the photoreceptor to be a set value set in advance, (i) in a set range including the set value, (ii) in a set range of the set value or more, or (iii) in a set range of the set value or less.

SYSTEM AND METHOD FOR CRYSTAL-TO-CHANNEL COUPLING

A multiplexing scheme, a system for reading out signals from an optical sensor array, particle detection devices and systems are provided. For example, the optical sensor array may comprise plurality of optical sensors arranged in rows and columns. In the multiplexing scheme, a readout ASIC may be electrically connected to the plurality of optical sensors via a plurality of first channels and a plurality of second channels. Each first channel may be electrically connected to a subset of optical sensors in a corresponding row of the optical sensor array, where there may be at least one optical sensor between connections. Each second channel may be electrically connected to a subset of optical sensors in a corresponding column of the optical sensor array, where there may be at least one optical sensor between connections.

MULTI-PIECE MONO-LAYER RADIATION DETECTOR

The present invention relates to a radiation detector () comprising: i) a substrate (); ii) a sensor, which is coupled to the substrate, the sensor comprising a first array () of sensor pixels, a second array () of signal read-out elements, and an electronic circuitry which is configured to provide image data based on signals received from the signal read-out elements; iii) a transducer, which is coupled to the substrate and to the sensor, the transducer comprising a third array () of subpixels, wherein at least two subpixels are assigned to one sensor pixel; wherein the second array of signal read-out elements and the third array of subpixels correspond to each other; wherein each of the subpixels comprises a radiation conversion material.

Signal readout circuit, signal readout device, and signal readout method for photodetection element

A signal readout circuit is a circuit for reading out a signal from a photodetection element having a plurality of photodetection pixels each generating a detection signal according to light incidence, and includes N light incidence detection units (N is an integer of 2 or more) each for inputting the detection signal from each of N photodetection pixels and outputting a signal indicating the light incidence, and a total value detection unit for detecting a total value of the output signals from the N light incidence detection units. Each light incidence detection unit outputs the signal weighted differently corresponding to each photodetection pixel. A weight thereof is set such that the total values are different for respective photodetection pixels and all combination patterns of the photodetection pixels.

COMBINED IMAGING DETECTOR AND IMAGING SYSTEM

The present invention relates to a combined imaging detector (10, 20) for detection of gamma and x-ray quanta comprising an integrating x-ray detector (11) comprising a first scintillator layer (12) and a photodetector array (13) and a second structured scintillator layer (14), optionally as part of a second gamma detector having a second photodetector array. The combined imaging detector can be used for X-ray and SPECT detection and uses the principle of current flat x-ray detectors. Different resolutions are used: high spatial resolution for x-ray imaging and low spatial resolution for SPECT imaging.

방사선 검출기

This radiation detector is provided with: a plurality of control lines extending in a first direction; a plurality of data lines extending in a second direction which intersects the first direction; photoelectric conversion units which are electrically connected to the corresponding control line and the corresponding data line, and each of which includes a photoelectric conversion element; scintillators provided on the plurality of photoelectric conversion units; a bias line which is electrically connected to the plurality of photoelectric conversion elements; a voltage generating circuit which is electrically connected to the bias line; and a radiation incidence determining circuit which is electrically connected to the bias line, and which detects a voltage change that occurs when incidence of radiation begins.

Device for the Detection of Gamma Rays with Active Partitions

The invention relates to a device for the detection of gamma rays (1) coming from a source (2) without image truncation and without image overlapping, comprising, at least, two detection cells (3) and each of said cells comprising a detection space (7) adapted to receive the gamma rays (1) that penetrate through an opening (5), wherein said detection space (7) comprises one or more detection assemblies (8, 8′), with some of said assemblies (8′) being positioned such that they stand in the way of the gamma rays (1) coming into the overlap volume (11) thereof.

Semiconductor device and method of driving the same

To provide a semiconductor device and a driving method of the same that is capable of enlarging a signal amplitude value as well as increasing a range in which a linear input/output relationship operates while preventing a signal writing-in time from becoming long. The semiconductor device having an amplifying transistor and a biasing transistor and the driving method thereof, wherein an electric discharging transistor is provided and pre-discharge is performed.

Radiological detector structure comprising a mechanical protection housing having plural layers of rigid material with a layer of cellular material therebetween

A portable radiological cassette includes a scintillator, a photosensitive slab, the scintillator and the photosensitive slab forming a panel, the panel having a front face intended to receive the incident x-ray and a rear face opposite the front face, an electronic circuit board, a mechanical protection housing, wherein the panel and the electronic circuit board are disposed, comprising a top face and a bottom face; wherein the top face of the mechanical protection housing comprises: a first layer of rigid material, a second layer of rigid material, the second layer of rigid material being in contact with the front face of the panel, a layer of cellular material disposed between the first and the second layers of rigid material.

NUCLEAR DETECTION SIMULATION DEVICE BASED ON NANOSECOND LIGHT SOURCE AND NUCLEAR SIGNAL INVERSION TECHNOLOGY

The present disclosure provides a nuclear detection simulation device based on a nanosecond light source and a nuclear signal inversion technology. Electronic circuits and nuclear pulse current signals are used to drive blue LEDs to emit nuclear pulse optical signals, so as to simulate a scintillator to receive γ radiation to emit light, and can simulate point sources and area sources, organic scintillator detectors and inorganic scintillators, scintillation efficiency and detection efficiency, radioactive sources, fast components and slow components, multi-type nuclear pulse signals, a statistical fluctuation phenomenon of nuclear pulses, the electron pair effect, the Compton effect, the photoelectric effect, and self-radiation of the scintillator, generate single or piled-up pulse signals, corresponding energy spectrum curves, and an environmental background spectral line. 3D visualization configuration and a nuclear signal detection process can be subjected to animated demonstration.

Electronic charge injection circuit for radiation detector

An electronic read circuit for a radiation detector comprises: an element sensitive to the radiation, an injection circuit, able to inject a charge at one terminal of the sensitive element, the injection circuit extending between at least one input terminal and one output terminal, the output terminal being able to be connected to the sensitive element, the injection circuit being able to produce a charge under the effect of a trigger pulse. The injection circuit is able to inject a first charge when an input terminal is connected to a first input potential and a second charge when an input terminal is connected to a second input potential. The circuit comprises means for storing a difference between an output potential of the injection circuit, called equilibrium potential, and a reference potential, such that the second charge depends on the second input potential and on the equilibrium potential.

PHOTOSENSITIVE CIRCUIT STRUCTURE AND OPTICAL DEVICE

A photosensitive circuit structure and an optical device, where the photosensitive circuit structure includes a photosensitive unit, a signal amplification unit and a control unit; the photosensitive unit includes a photodiode and a reset transistor, the signal amplification unit includes an amplification transistor, and the control unit includes a control transistor; an input terminal, an output terminal and a control terminal of the reset transistor are electrically connected to a power supply terminal, a control terminal of the amplification transistor and a reset signal terminal, respectively; an input terminal and output terminal of the amplification transistor are electrically connected to the power supply terminal and an input terminal of the control transistor respectively, and a control terminal of the control transistor is connected to a signal control terminal.

RADIATION DETECTOR, METHOD FOR MANUFACTURING RADIATION DETECTOR, AND IMAGING METHOD

A radiation detector according to an embodiment of the disclosure includes a substrate, a plurality of pixels arranged on the substrate, the plurality of pixels each including a switching element and a photoelectric conversion element, a scintillator arranged to cover the photoelectric conversion element of each of the plurality of pixels, and a storage device configured to store inspection image data acquired by irradiating the plurality of pixels with visible light before forming the scintillator or a calibration parameter based on the inspection image data.

RADIATION DETECTOR, RADIOGRAPHIC IMAGING DEVICE, AND MANUFACTURING METHOD

A radiation detector including: a substrate formed with plural pixels that accumulate electrical charges generated in response to light converted from radiation in a pixel region at an opposite-side surface of a base member to a surface including a fine particle layer; the base member being flexible and is made of resin and that includes a fine particle layer containing inorganic fine particles having a mean particle size of from 0.05 μm to 2.5 μm, a conversion layer provided at the surface of the base member provided with the pixel region and configured to convert the radiation into light; and a reinforcement substrate provided to at least one out of a surface on the substrate side of a stacked body configured by stacking the substrate and the conversion layer, or a surface on the conversion layer side of the stacked body. 1. A radiation detector comprising:a substrate formed with a plurality of pixels that accumulate electrical charges generated in response to light converted from radiation in a pixel region at an opposite-side surface of a base member to a surface including a fine particle layer; the base member being flexible and is made of resin and that includes a fine particle layer containing inorganic fine particles having a mean particle size of from 0.05 μm to 2.5 μm,a conversion layer provided at the surface of the base member provided with the pixel region and configured to convert the radiation into light; anda reinforcement substrate provided to at least one out of a surface on the substrate side of a stacked body configured by stacking the substrate and the conversion layer, or a surface on the conversion layer side of the stacked body.2. The radiation detector of claim 1 , wherein the base member has a coefficient of thermal expansion no greater than 20 ppm/K at 300° C. to 400° C.3. The radiation detector of claim 1 , wherein the base member satisfies at least one condition out of:having a heat shrinkage ratio in a machine direction at 400° C. and ...

RADIATION IMAGE CAPTURING APPARATUS AND RADIATION IMAGE CAPTURING SYSTEM

A radiation image capturing apparatus includes a pixel array including conversion elements arranged in rows and columns on an optically transparent substrate, signal lines that outputs a signal generated by the conversion elements and that extends in a column direction, a first scintillator disposed near a first surface of the substrate, and a second scintillator disposed near a second surface of the substrate opposite the first surface. The conversion elements include first conversion elements and second conversion elements. A light shielding layer is disposed between the first scintillator and the second conversion elements such that an amount of light that is received by the second conversion elements from the first scintillator is smaller than that received by the first conversion elements. A number of columns of the conversion elements is equal to a number of the signal lines.

SINGLE LIGHT PHOTON COUNTING RADIATION DETECTOR AND DATA TRANSMISSION METHODS

A single photon radiation detector is designed for a particular radiation source fluence, such that an incident radiation photon strikes a scintillator monolith, creating scintillation photons, which are amplified by appropriately sized channels of photomultipliers optically coupled to the scintillator monolith. The photomultiplier output is electronically shaped into a corresponding stream of scintillation pulses (otherwise referred to as scintillation photons) that pass through a comparator to produce a bitstream of the detected scintillation photons, which is sampled into a field programmable gate array (FPGA) acting as a giga-sample transceiver to produce time-to-digital conversions, capable of producing an output data stream of 10's-of-giga-samples per second or more. Appropriate design ensures sparsity of scintillation photon arrival, so that each photon in the bitstream corresponds to a single incident scintillation photon.

PHOTON COUNTING DETECTOR AND PHOTON COUNTING METHOD

The present invention relates to a photon counting detector and method. The detector (2) comprises a scintillator (10) configured to convert incident gamma radiation into optical photons, a pixelated photodetector (11) configured to detect the flux of optical photons, and circuitry (12). The circuitry is configured to determine, per photodetector pixel, a photon count by accumulating the number of optical photons detected by the respective photodetector pixel during an integration time period, compare, per photodetector pixel or group of photodetector pixels, a single photon count or multiple photon counts to a counting threshold, detect an event if, per photodetector pixel or group of photodetector pixels, the one or more photon counts exceed the counting threshold, and temporarily adapt the counting threshold for use in the comparison in one or more subsequent integration time periods based on the energy of the detected event.

A radiation detector with quantum dot scintillator

Disclosed herein is a radiation detector comprising: a layer of quantum dots configured to emit a pulse of visible light upon absorbing a radiation particle; an electronic system configured to detect the radiation particle by detecting the pulse of visible light.

RADIOGRAPHIC IMAGING APPARATUS

A radiographic imaging apparatus including: a sensor substrate in which pixels are formed in a first surface of a base material; a conversion layer provided on the first surface; a signal processing substrate provided on one side the sensor substrate and includes at least a part of a signal processing unit; a driving substrate provided on the one side or the other side of the sensor substrate and includes at least a part of a drive unit; a first cable of which one end is connected to the sensor substrate and the other end is electrically connected to the signal processing substrate; and a second cable of which one end is connected to the sensor substrate, and passes through the first surface side or a second surface side of the base material and the other end is connected to the driving substrate.

IMPROVED IMAGE ACQUISITION

The present invention relates to a detection device for X-rays, an imaging system and a method for detecting electro-magnetic radiation using a detection device for X-rays, wherein an estimate of an incomplete measurement is acquired prior to a discontinuity of the electromagnetic radiation, wherein the discontinuity is a change or interruption in a beam or in an intensity of the electromagnetic radiation.

RADIATION IMAGING APPARATUS AND RADIATION IMAGING SYSTEM

A radiation imaging apparatus includes a radiation detecting panel configured to convert radiation into an image signal, and a burn-in estimating unit configured to estimate, from the image signal, burn-in of the radiation detecting panel due to the radiation. When the burn-in estimating unit estimates that burn-in occurs, the burn-in estimating unit outputs information regarding stop of emission of the radiation to an external apparatus.

MEASURING SYSTEM FOR DETERMINING A MEASURED QUANTITY BY MEANS OF A PHOTODETECTOR

Semiconductor device and method of driving the same

To provide a semiconductor device and a driving method of the same that is capable of enlarging a signal amplitude value as well as increasing a range in which a linear input/output relationship operates while preventing a signal writing-in time from becoming long. The semiconductor device having an amplifying transistor and a biasing transistor and the driving method thereof, wherein an electric discharging transistor is provided and pre-discharge is performed.

RADIATION IMAGING APPARATUS AND RADIATION IMAGING SYSTEM

A radiation imaging apparatus comprises at least one first detection element including a first conversion element configured to convert radiation into an electrical signal and a first switch configured to connect an output from the first conversion element to a first signal line, at least one second detection element including a second conversion element configured to convert radiation into an electrical signal and a second switch configured to connect an output from the second conversion element to a second signal line, a readout unit configured to read out signals appearing on the first signal line and the second signal line, and a signal processing circuit configured to process a signal read out from the readout unit. A sensitivity of the first conversion element for the radiation is set to be different from a sensitivity of the second conversion element for the radiation. 1. A radiation imaging apparatus comprising:at least one first detection element including a first conversion element configured to convert radiation into an electrical signal and a first switch configured to connect an output from the first conversion element to a first signal line;at least one second detection element including a second conversion element configured to convert radiation into an electrical signal and a second switch configured to connect an output from the second conversion element to a second signal line;a readout unit configured to read out signals appearing on the first signal line and the second signal line;a reset unit configured to reset potentials of the first signal line and the second signal line; anda signal processing circuit configured to process a signal read out from the readout unit, whereina sensitivity of the first conversion element for the radiation is set to be different from a sensitivity of the second conversion element for the radiation,a period for causing the readout unit to read out the signals from the first signal line and the second signal line ...

ELECTRIC CIRCUITRY FOR BASELINE EXTRACTION IN A PHOTON COUNTING SYSTEM

An electric circuitry for baseline extraction in a photon counting system includes an input signal integrity detector to determine an integrity of an input signal for baseline extraction, a sampling circuit to sample the input signal during a sampling time, and to provide a sampled version of the input signal, a signal processing circuit to process the sampled version of the input signal, and a signal processing controller to control the signal processing circuit. The input signal integrity detector is configured to determine the integrity of the input signal for baseline extraction by evaluating the input signal or the sampled version of the input signal. The signal processing controller is configured to control the signal processing circuit so that the sampled version of the input signal is processed, when the integrity of the input signal for baseline extraction is determined by the input signal integrity detector at least during the sampling time.

Imagers in radiation therapy environment

An imager includes: an array of imager elements configured to generate image signals based on radiation received by the imager; and circuit configured to perform readout of image signals, wherein the circuit is configured to be radiation hard. An imager includes: an array of imager elements configured to generate image signals based on the radiation received by the imager; and readout and control circuit coupled to the array of imager elements, wherein the readout and control circuit is configured to perform signal readout in synchronization with an operation of a treatment beam source.

신틸레이터를 이용한 방사선 검출기 및 이의 작동 방법

... 본 발명은 제1 방향으로 타겟 영역을 향해 입자 빔을 방사하여 타겟 영역에서 전자기 방사선의 방출이 발생하도록 구성된 이미터; 제1 신틸레이터 및 상기 제1 신틸레이터에 각각 연결된 제1 광 센서의 스택을 포함하고, 상기 전자기 방사선을 검출하여 제1 신호로 변환하도록 구성된 제1 검출 모듈; 제2 신틸레이터 및 상기 제2 신틸레이터에 각각 연결된 제2 광 센서의 스택을 포함하고, 상기 전자기 방사선을 검출하여 제2 신호로 변환하도록 구성된 제2 검출 모듈; 및 상기 제1 신호 및 제2 신호에 기초하여 제1 방향에 대한 상기 입자 빔의 종점을 결정하도록 구성된 동시 발생 검출 회로를 포함하는 것을 특징으로 하는 실시간 브래그 피크 검출기를 제공한다.

Silicon photomultiplier based TOF-PET detector

A scintillation block detector employs an array of optically air coupled scintillation pixels, the array being wrapped in reflector material and optically coupled to an array of silicon photomultiplier light sensors with common-cathode signal timing pickoff and individual anode signal position and energy determination. The design features afford an optimized combination of photopeak energy event sensitivity and timing, while reducing electronic circuit complexity and power requirements, and easing necessary fabrication methods. Four of these small blocks, or “miniblocks,” can be combined as optically and electrically separated quadrants of a larger single detector in order to recover detection efficiency that would otherwise be lost due to scattering between them. Events are validated for total energy by summing the contributions from the four quadrants, while the trigger is generated from either the timing signal of the quadrant with the highest energy deposition, the first timing signal ...

X-ray phase contrast detector

The present disclosure relates to fabrication and use of a phase-contrast imaging detector that includes sub-pixel resolution electrodes or photodiodes spaced to correspond to a phase-contrast interference pattern. A system using such a detector may employ fewer gratings than are typically used in a phase-contrast imaging system, with certain functionality typically provided by a detector-side analyzer grating being performed by sub-pixel resolution structures (e.g., electrodes or photodiodes) of the detector. Measurements acquired using the detector may be used to determine offset, amplitude, and phase of a phase-contrast interference pattern without multiple acquisitions at different phase steps.

RADIATION DETECTION APPARATUS HAVING AN ANALYZER WITHIN A HOUSING

A radiation detection apparatus can include a scintillator to emit scintillating light in response to absorbing radiation; a photosensor to generate an electronic pulse in response to receiving the scintillating light; an analyzer to determine a characteristic of the radiation; and a housing that contains the scintillator, the photosensor, and the analyzer, wherein the radiation detection apparatus to is configured to allow functionality be changed without removing the analyzer from the housing. The radiation detection apparatus can be more compact and more rugged as compared to radiation detection apparatuses that include a photomultiplier tube.

RADIOGRAPHY APPARATUS

Provided is a radiography apparatus capable of changing the shape and size at an imaging site. A radiography apparatus (1) includes a scintillator (12), and a substrate (11) that is laminated on the scintillator (12) and has a plurality of photoelectric conversion elements (17) converting light emitted from the scintillator (12) into electric charges, in which a laminate including the scintillator (12) and the substrate (11) is partitioned into a plurality of blocks (10A) to (10I), and the blocks are separable from each other.

RADIATION COUNTING DEVICE AND METHOD OF CONTROLLING RADIATION COUNTING DEVICE

A radiation counting device is provided that includes a scintillator, a pixel circuit, and an analog-to-digital conversion circuit. In the radiation counting device, the scintillator generates a photon when radiation is incident. In the radiation counting device, the pixel circuit converts the photon into charge, stores the charge over a predetermined period, and generates an analog voltage in accordance with the amount of stored charge. In the radiation counting device, the analog-to-digital conversion circuit converts the analog voltage into a digital signal in a predetermined quantization unit less than the analog voltage generated from the one photon.

RADIATION IMAGE DETECTOR

An electronic cassette has a detection panel (light detection substrate) in which pixels for accumulating electric charges corresponding to radiation are arranged. The electronic cassette includes two gate control circuits that control an operation of a gate drive circuit, a power supply circuit that supplies power to the gate control circuits, a first wiring line, and a second wiring line. The first wiring line connects the power supply circuit and each of two gate control circuits to each other, and supplies each of two gate control circuits with the power supplied from the power supply circuit. The second wiring line connects two gate control circuits to each other. The power supplied from the power supply circuit to one of two gate control circuits is diverted to the other, through the second wiring line.

Flat-panel detector comprising light-transmission layer between ray-conversion layer and photoelectric conversion layer and method of manufacturing flat-panel detector

A flat-panel detector includes: a ray-conversion layer configured to convert rays into a light having a first wavelength; and a plurality of imaging units. At least one of the plurality of imaging units includes: a photo sensor configured for receiving the light and converting the light to an electrical signal; and a light guider located a side of the photo sensor adjacent to the ray-conversion layer, the light guider having a light entry surface adjacent to the ray-conversion layer and a light exit surface adjacent to the photo sensor, the light entry surface being configured to receive the light from the ray-conversion layer and having an area greater than an area of the light exit surface, and an orthogonal projection of the light exit surface in a direction perpendicular to the ray-conversion layer at least partially overlapping that of the photo sensor.

RADIATION DETECTION MODULE, RADIATION DETECTOR, AND METHOD FOR MANUFACTURING RADIATION DETECTION MODULE

A radiation detection module according to an embodiment includes an array substrate including multiple photoelectric converters, a scintillator that covers a region in which the multiple photoelectric converters are located and that has larger dimensions than the region in which the multiple photoelectric converters are located when viewed in plan, and a light-absorbing part that is located on the scintillator and is capable of absorbing visible light. The light-absorbing part is located outward of the region in which the multiple photoelectric converters are located when viewed in plan.

X-RAY DETECTOR

CONVERTER ARRAY, DETECTOR, AND PHOTODIODE ARRAY

According to one embodiment, a converter array includes a first substrate, multiple sets of a plurality of analog-digital converters and a switch. The multiple sets are arranged on the first substrate in array. The switch is configured to switch a connection relationship between the plurality of analog-digital converters to process signals from photodiodes smaller in number than the analog-digital converters. 1. A converter array comprising:a first substrate; andmultiple sets of a plurality of analog-digital converters and a switch which are arranged on the first substrate in array, whereinthe switch is configured to switch a connection relationship between the plurality of analog-digital converters to process signals from photodiodes smaller in number than the analog-digital converters.2. The converter array according to claim 1 , whereinthe switch is turned on when a photodiode for a normal resolution is connected, andthe signals are read out by sequential switching between the plurality of analog-digital converters.3. A detector comprising:{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'the converter array according to ;'}a second substrate stacked on the converter array;one or more photodiodes arranged on the second substrate and smaller in number than the plurality of analog-digital converters; andan interconnect layer arranged between the converter array and the second substrate and configured to bundle the signals from the one or more photodiodes,wherein the one or more photodiodes and the interconnect layer are arrayed in correspondence with the multiple sets of the plurality of analog-digital converters and the switch.4. The detector according to claim 3 , whereinthe switch is turned on when the one or more photodiodes are for processing of a pixel size of a normal resolution, andthe signals are read out by sequential switching between the analog-digital converters.5. The detector according to claim 3 , whereinthe interconnect layer is formed on a ...

MANUFACTURING METHOD OF RADIATION IMAGING APPARATUS, RADIATION IMAGING APPARATUS, AND RADIATION IMAGING SYSTEM

A manufacturing method of a radiation imaging apparatus is provided. The radiation imaging apparatus includes a sensor substrate and a scintillator that are bonded by a bonding member. The manufacturing method includes: preparing a support substrate on which the scintillator has been formed; bonding the sensor substrate and the scintillator via the bonding member; and separating the support substrate after the bonding. The bonding is performed under reduced pressure.

RADIATION DETECTOR

A radiation detector includes control and data lines extending respectively in mutually-orthogonal first and second directions, photoelectric conversion parts respectively in regions defined by the control and data lines, noise detecting parts outside a region including the photoelectric conversion parts, a control circuit inputting control signals to first and second thin film transistors located respectively in the photoelectric conversion and noise detecting parts, a signal detection circuit reading image data and noise signals respectively from the photoelectric conversion and noise detecting parts, and an image configuration circuit configuring a radiation image based on the signals that are read. The signals from the photoelectric conversion parts adjacent to the noise detecting parts are not read and/or are not used by the image configuration circuit when configuring the radiation image, and/or the photoelectric conversion parts adjacent to the noise detecting parts are not electrically ...

A TIME-RESOLVED POSITRON EMISSION TOMOGRAPHY ENCODER SYSTEM

RADIATION IMAGING APPARATUS, RADIATION IMAGING SYSTEM, DRIVE METHOD FOR RADIATION IMAGING APPARATUS, AND NON-TRANSITORY COMPUTER-READABLE STORAGE MEDIUM

A radiation imager comprising pixels each including a converter to generate a signal, a sampling circuit and a processor is provided. The sampling circuit samples the signal with first sensitivity and with second sensitivity higher than the first sensitivity. If a first signal value obtained by sampling the signal with the first sensitivity is smaller than a first threshold, the processor generates a pixel value based on a second signal value obtained by sampling the signal with the second sensitivity, if the first signal value exceeds a second threshold larger than the first threshold value, the processor generates a pixel value based on the first signal value, and if the first signal value is not less than the first threshold and not more than the second threshold, the processor generates a pixel value based on the first and second signal values.

X-RAY FLAT PANEL DETECTOR, METHOD FOR MANUFACTURING X-RAY FLAT PANEL DETECTOR, DETECTION DEVICE AND IMAGING SYSTEM

An X-ray flat panel detector, a method for manufacturing the X-ray flat panel detector, a detection device and an imaging system are provided. The X-ray flat panel detector includes: a substrate; a back plate layer arranged on the substrate and including a plurality of thin film transistors, each thin film transistor including a source/drain electrode layer; a wiring layer arranged at a side of the back plate layer distal to the substrate and including a plurality of connection lines; and a photosensitive element layer arranged at a side of the wiring layer distal to the substrate and including first electrodes. Each first electrode is electrically connected to the source/drain electrode layer of a corresponding thin film transistor through a corresponding connection line, and an orthogonal projection of the first electrode onto the substrate does not overlap an orthogonal projection of the corresponding thin film transistor onto the substrate.

THIN FILM TRANSISTOR ARRAY SUBSTRATE FOR DIGITAL X-RAY DETECTOR DEVICE AND DIGITAL X-RAY DETECTOR DEVICE INCLUDING THE SAME

A thin film transistor array substrate for a digital X-ray detector device includes a base substrate where a driving area and a non-driving area are defined; at least one readout circuit pad disposed in the non-driving area and electrically connected to the drive area; at least one readout circuit pad connection line electrically connecting the driving area to the at least one readout circuit pad; and at least one electrostatic induction line electrically connected to the at least one readout circuit pad connection line, wherein the at least one electrostatic induction line has a greater resistance than a resistance of the at least one readout circuit pad connection line. 1. A thin film transistor array substrate for a digital X-ray detector device , comprising:a base substrate where a driving area and a non-driving area are defined;at least one readout circuit pad disposed in the non-driving area and electrically connected to the drive area;at least one readout circuit pad connection line electrically connecting the driving area to the at least one readout circuit pad; andat least one electrostatic induction line electrically connected to the at least one readout circuit pad connection line,wherein the at least one electrostatic induction line has a greater resistance than a resistance of the at least one readout circuit pad connection line.2. The thin film transistor array substrate of claim 1 , wherein the at least one electrostatic induction line does not overlap with the at least one readout circuit pad connection line and is disposed between the at least one readout circuit pad connection lines that are adjacent to each other.3. The thin film transistor array substrate of claim 2 , wherein the at least one electrostatic induction line has a width that is smaller than a width of the at least one readout circuit pad connection line.4. The thin film transistor array substrate of claim 3 , further comprising at least one capacitor disposed below the at least one ...

IMPROVED SENSOR AND COINCIDENCE RADIATION DETECTION DEVICE

Semiconductor device and method of driving the same

To provide a semiconductor device and a driving method of the same that is capable of enlarging a signal amplitude value as well as increasing a range in which a linear input/output relationship operates while preventing a signal writing-in time from becoming long. The semiconductor device having an amplifying transistor and a biasing transistor and the driving method thereof, wherein an electric discharging transistor is provided and pre-discharge is performed.

SCINTIGRAPHIC MEASUREMENT DEVICE WITH EXTENDED AREA

Multi-piece mono-layer radiation detector

The present invention relates to a radiation detector (100) comprising: i) a substrate (110); ii) a sensor, which is coupled to the substrate, the sensor comprising a first array (120) of sensor pixels, a second array (130) of signal read-out elements, and an electronic circuitry which is configured to provide image data based on signals received from the signal read-out elements; iii) a transducer, which is coupled to the substrate and to the sensor, the transducer comprising a third array (140) of subpixels, wherein at least two subpixels are assigned to one sensor pixel; wherein the second array of signal read-out elements and the third array of subpixels correspond to each other; wherein each of the subpixels comprises a radiation conversion material.

Image acquisition

The present invention relates to a detection device for X-rays, an imaging system and a method for detecting electro-magnetic radiation using a detection device for X-rays, wherein an estimate of an incomplete measurement is acquired prior to a discontinuity of the electromagnetic radiation, wherein the discontinuity is a change or interruption in a beam or in an intensity of the electromagnetic radiation.

Active pixel sensor and flat panel detector

The present disclosure provides an active pixel sensor and a flat panel detector. The active pixel sensor includes: a light sensing device configured to convert light sensed by the light sensing device into charges and supply the charges to a floating diffusion node; an amplification sub-circuit configured to amplify a signal according to a potential at the floating diffusion node and output the amplified signal through the output terminal; an adjustment sub-circuit configured to adjust, in response to a first control signal, a conversion gain from an amount of the light sensed by the light sensing device to the potential at the floating diffusion node; and a read sub-circuit configured to transmit a voltage of the input terminal of the read sub-circuit to the output terminal of the read sub-circuit according to a scan signal provided by the scan line.

X-RAY DETECTION DEVICE AND DETECTION METHOD FOR CONTROLLING X-RAY SOURCE

The disclosure provides a light detection device (100) and a detection method (SI00) for controlling a light source device (LSD). The light detection device (100) includes a detection panel (110) and a processor (120). The detection panel (110) converts an input light from the light source device (LSD) into a converted light (L2) and converts the converted light (L2) into a charge. The processor (120) selects a first region (R1) and a second region (R2) other than the first region (R1) from the detection panel (110). A first charge (C1) of the converted light (L2) received by at least one first pixel (P1) of the first region (R1) during a first period is used to detect a dose of the input light. A second charge (C2) of the converted light (L2) received by the second region (R2) during the first period is used to generate a data image (OIMG). The charge of the converted light (L2) received by at least one first pixel (P1) during a second period is used to generate the data image (OIMG).

Device for the detection of gamma rays with active partitions

The invention relates to a device for the detection of gamma rays coming from a source without image truncation and without image overlapping, comprising, at least, two detection cells and each of said cells comprising a detection space adapted to receive the gamma rays that penetrate through an opening, wherein said detection space comprises one or more detection assemblies, with some of said assemblies being positioned such that they stand in the way of the gamma rays coming into the overlap volume thereof.

RADIATION IMAGING APPARATUS AND RADIATION IMAGING SYSTEM

A difference in wiring capacitance between bias lines is reduced by equalizing, for pixels A connected to a signal line from a first direction and pixels B connected to the signal line from a second direction, the numbers of the pixels A and the pixels B where the pixels A and the pixels B are each connected to the corresponding bias line.

Scintillator radiation detector and corresponding dosimeter

A device such as a dosimeter for detecting ionizing radiation, for example, X-ray radiation, in hospitals or the like. The device includes scintillator material configured to produce light as a result of radiation interacting with the scintillator material, and photoelectric conversion circuitry optically coupled to the scintillator material and configured to produce electrical signals via photoelectric conversion of light produced by the scintillator material. The device includes a plurality of photoelectric converters optically coupled with the scintillator material at spatially separated locations. The plurality of photoelectric converters thus produce respective electrical signals by photoelectric conversion of light produced by the scintillator material as a result of radiation interacting with the scintillator material. Improved energy linearity is thus facilitated while providing more efficient detection over the whole energy spectrum of radiation detected.

Radiation detector, radiographic imaging device and manufacturing method

A radiation detector which is provided with: a flexible substrate that is formed of a resin and is provided with a plurality of pixels, which store electric charges that are generated in accordance with light that is converted from radiation, in a pixel region in a surface of a base material that has a fine particle layer containing inorganic fine particles having an average particle diameter of from 0.05 [mu]m to 2.5 [mu]m (inclusive), said surface being on the reverse side of the surface on which the fine particle layer is present; a conversion layer that converts the radiation into light and is provided on the surface of the base material, said surface being provided with the pixel region; and a reinforcing substrate which is provided on at least one of the substrate-side surface or the conversion layer-side surface of a multilayer body that is obtained by stacking the substrate and the conversion layer.

Semiconductor device and method of driving the same

To provide a semiconductor device and a driving method of the same that is capable of enlarging a signal amplitude value as well as increasing a range in which a linear input/output relationship operates while preventing a signal writing-in time from becoming long. The semiconductor device having an amplifying transistor and a biasing transistor and the driving method thereof, wherein an electric discharging transistor is provided and pre-discharge is performed.

Apparatus, system and method regarding borehole muon detector for muon radiography and tomography

A borehole muon detector for detecting and characterizing a geographic region of interest is provided, the borehole muon detector comprising a housing and sensor, which is housed in the housing, the sensor including: a plurality of photodetector elements; at least one printed circuit board in electrical communication with the plurality of photodetectors and including an integrated electronic circuit for tracking time; a first helical bundle of scintillator fibers; an oppositely wound helical bundle of scintillator fibers, the oppositely wound helical bundle, the first helical bundle and the opposite helical bundle defining an outer cylinder, which includes a first end and a second end and a bore therebetween, each scintillator fiber of each bundle directly optically connected to a photodetector element at least at one end and indirectly optically connected to the photodetector element at no more than one end; and a plurality of scintillator bars, each comprising a first end, a second end ...

Multiple energy detector

The present specification describes an improved multi-energy radiation detector. In one embodiment, the signal generated by the detection medium is converted to digital form directly at the point of signal collection. This avoids the need for power intensive high bandwidth amplifiers and analog-to-digital converters, as it integrates the sensing device and signal processing onto the same silicon substrate to reduce the number of components in the system. In one embodiment, a single photon avalanche diode (SPAD) is coupled directly to a threshold detector to achieve an intrinsically low power and low noise detector.

Radiographic imaging system

A response with a wider dynamic range is obtained without a need for irradiating strong radiation onto a subject (human body). A CCD controller 22 allows reading of imaging signals from CCD image sensors 1 to 12, which is performed twice during different time periods, once during a long exposure time period and once during a short exposure time period, with respect to the irradiation of a constant dose of radiation by an X-ray generator 25; and a main controller 26 allows a memory 24 to synthesize image data from the successively twice-read imaging signals into an image with proper timing. As a result, it becomes unnecessary to irradiate strong radiation onto a subject, such as a human body and other substances, as is done conventionally, owing to a radiation dose weak enough not to cause a harmful influence.

Radiation detector with multiple operating schemes

A radiation detector includes a conversion element that converts an incoming radiation beam into electrical signals, which in turn can be used to generate data about the radiation beam. The conversion element may include, for example, a scintillator that converts the radiation beam into light, and a sensor that generates the signals in response to the light. The conversion element can be used in different schemes or data collection modes. For instance, the conversion element can be oriented normal to the radiation beam or transverse to the radiation beam. In either of these orientations, for example, the detector can be used in an integrating mode or in a counting mode.

Connection substrate

A connection substrate 13 includes a base material 130 formed by stacking a plurality of dielectric layers 130 a to 130 f and a plurality of through conductors 20 provided penetrating through the dielectric layers 130 c to 130 f adjacent to each other. A plurality of radiation shielding films 21 a to 23 a formed integrally with each of the plurality of through conductors 20 and separated from each other are provided at two or more interlayer parts in the dielectric layers 130 c to 130 f. A region PR 1 of the radiation shielding film 21 a ( 21 b ) formed integrally with one through conductor 20 in one interlayer part projected onto a virtual plane normal to a predetermined direction and a region of the radiation shielding film 22 b or 22 c ( 22 c ) formed integrally with another through conductor 20 in another interlayer part projected onto the virtual plane do not overlap each other. Accordingly, the readout circuits of an integrated circuit device can be protected from radiation, and an increase in parasitic capacitance can be suppressed.

Radiation detection panel

A radiation detection panel includes a single light emitting section, a first detection section and a second detection section. The single light emitting section absorbs radiation that has been transmitted through an imaging subject and that emits light. The first detection section detects light emitted from the light emitting section as an image. The second detection section that is formed from an organic photoelectric conversion material and that detects light emitted from the light emitting section. The light emitting section, the first detection section and the second detection section are stacked in layers along a radiation incident direction.

High-sensitivity x-ray detector

A device for the sensitive detection of X-rays comprises a structured scintillator screen optically coupled to a semiconductor image sensor. The scintillator screen comprises individual columnar elements covered with material showing high optical reflection. Each columnar element represents a pixel, and light flashes created by an X-ray photon in a scintillating event exit through a short surface of the columnar element for detection with a semiconductor image sensor. The semiconductor image sensor comprises a multitude of photosensor elements, and one or more of these photosensor elements receives light from a scintillator screen pixel. Each photosensor element of the image sensor comprises a semiconductor volume where photocharge is created, a lateral drift-field device for the collection of photocharge, an electronic detection circuit for the conversion of collected photocharge packets either into proportional voltage pulses, into binary signals indicating the arrival of X-ray photons or into digital signals whose values correspond to the energy of the incident X-ray photons.

SCINTILLATOR RADIATION DETECTOR AND CORRESPONDING DOSIMETER

A device such as a dosimeter for detecting ionizing radiation, for example, X-ray radiation, in hospitals or the like. The device includes scintillator material configured to produce light as a result of radiation interacting with the scintillator material, and photoelectric conversion circuitry optically coupled to the scintillator material and configured to produce electrical signals via photoelectric conversion of light produced by the scintillator material. The device includes a plurality of photoelectric converters optically coupled with the scintillator material at spatially separated locations. The plurality of photoelectric converters thus produce respective electrical signals by photoelectric conversion of light produced by the scintillator material as a result of radiation interacting with the scintillator material. Improved energy linearity is thus facilitated while providing more efficient detection over the whole energy spectrum of radiation detected. 1. A device , comprising:a scintillator material; andphotoelectric conversion circuitry optically coupled to the scintillator material, the photoelectric conversion circuitry including a plurality of photoelectric converters that are optically coupled with the scintillator material at different portions of the scintillator material.2. The device of claim 1 , wherein the scintillator material includes at least one scintillator body extending in a first direction claim 1 , and wherein a first photoelectric converter and a second photoelectric converter of the plurality of photoelectric converters are coupled with the at least one scintillator body at locations spatially separated along the first direction.3. The device of claim 1 , wherein the plurality of photoelectric converters comprise:at least one first photoelectric converter coupled with the scintillator material at a first surface of the scintillator material; andat least one second photoelectric converter coupled with the scintillator material at a ...

Systems and Methods for Shutterless Afterglow Measurement

The present specification discloses a system that employs a shutter-less method of measuring afterglow, in which the start and termination of the stimulating radiation from the radiation source is controlled electronically. A fast decay scintillator may be used in the beam path to monitor and track the rise and fall of the stimulating radiation to determine the dose and full cessation of the stimulating radiation. This information is used to calculate the afterglow for a slow decay scintillator. This method can also be used to calibrate and normalize scanned image data and produce an enhanced image. The fast decay scintillator is used as a monitoring or tracking device to be able to determine radiation source decay. 1. A method for measuring radiation afterglow for a first detector comprising a slow decay scintillator coupled to a first photodiode , said method comprising:providing a second detector comprising a fast decay scintillator coupled to a second photodiode;placing said first and said second detectors in the path of a radiation beam generated by a radiation source;using electronic means for switching on said radiation source;using an electrical circuit in contact with said first and said second detectors to produce a first and a second electrical signal corresponding to the detected radiation;using electronic means for switching off said radiation source;determining a first point in time when the second detector comprising said fast decay scintillator detects complete cessation of radiation; andmeasuring the detected radiation level for the first detector comprising said slow decay scintillator from said first point in time till the point in time when said first detector detects complete cessation of radiation.2. The method of claim 1 , wherein the radiation source is turned on for a time duration ranging from 0.1 to 30 seconds.3. The method of claim 1 , wherein a duration for which the radiation source is turned on is dependent upon the slow decay ...

Radiation sensor with x-ray detection

The invention relates to medical imaging and, more specifically, to intraoral dental radiology. The sensor according to the invention includes a series (SPHx) of detection photodiodes for detecting the arrival of an X-ray flash. The series of photodiodes occupies the location of a central column of the matrix of pixels. The signal of the missing pixel in each row can be reconstructed by interpolating the signals provided by the adjacent pixels of the row. The detection photodiodes are identical to the photodiodes of the active CMOS pixels. They are all electrically connected on one side to a reference potential and on the other side to a detection conductor (CD) extending along the series of photodiodes. This detection conductor is connected to a detection circuit (DX) delivering a signal for triggering the capture of an image when the detected current or the variation in this current exceeds a threshold showing that an X-ray flash has been initiated.

Radiation detector

The present invention relates to a radiation detector including a scintillator configured to emit light based on absorption of radiation, and a light detection unit configured to detect the light emitted from the scintillator. The light detection unit includes a top electrode, a plurality of n-type doped layers, a first intrinsic layer, a p-type doped layer, and a lower electrode.

Radiation detector

A radiation detector includes a substrate, control lines provided on the substrate and extending in a first direction, data lines provided on the substrate and extending in a second direction crossing the first direction, and detection parts arranged in a matrix. Each detection part includes a thin film transistor and a conversion part converting radiation or light into electricity. Further, a control circuit switches an on state and an off state of each thin film transistor and a signal detection circuit reads out image data in the on state of the thin film transistor. Further, the detector judges a start time of radiation incidence based on a value of the image data read out in the on state of each thin film transistor.

Positron emission tomography detecting device

A PET detecting device may include a plurality of detection modules and a processing engine. Each of the plurality of detection modules may include a scintillator array, one or more photoelectric converters, one or more energy information determination circuits and a time information determination circuit. The scintillator array may interact with a plurality of photons at respective interaction points to generate a plurality of optical signals. The one or more photoelectric converters may convert the plurality of optical signals to one or more electric signals that each include an energy signal and a time signal. The one or more energy information determination circuits may generate energy information based on the one or more energy signals. The time information determination circuit may generate time information based on the one or more time signals. The processing engine may generate an image based on the energy information and the time information.

Structured detectors and detector systems for radiation imaging

Detector module designs for radiographic imaging include first and second layers of scintillator rods or pixel arrays oriented in first and second directions. The first and second directions are transversely oriented to define a light sharing region between the first and second layers. Encoding features may be disposed in, on or between the first and second layers, and configured to modulate propagation of optical signals therealong or therebetween.

Image acquisition device and image acquisition method

An image acquisition device is an image acquisition device that acquires an X-ray transmission image of an object conveyed in a conveyance direction, and the image acquisition device includes an X-ray irradiator that outputs an X-ray, a belt conveyor that conveys the object in the conveyance direction, an X-ray detection camera having a scintillator that converts an X-ray penetrating the object into scintillation light, a line scan camera that detects the scintillation light and outputs a detection signal, and an amplifier that amplifies the detection signal at a predetermined set amplification factor and outputs a amplified signal, a controller that generates an X-ray transmission image based on the amplified signal, and an amplifier controller that sets one of a first amplification factor or a second amplification factor corresponding to an amplification factor lower than the first amplification factor as the set amplification factor based on a predetermined imaging condition.

High Yield Complementary Metal-Oxide Semiconductor X-ray Detector

A digital X-ray detector includes a scintillator that is configured to absorb radiation emitted from an X-ray radiation source and to emit light photons in response to the absorbed radiation. The detector also includes a complementary metal-oxide-semiconductor (CMOS) light imager that is configured to absorb the light photons emitted by the scintillator. The CMOS light imager includes a first surface and a second surface. The first surface is disposed opposite the second surface. The scintillator contacts the first surface of the CMOS light imager. The CMOS light imager further includes a CMOS pixel array with an array of CMOS pixels. Each individual CMOS pixel includes at least two row select transistors.

Radiation detection and method for non-destructive modification of signals

A radiation detector, comprising: a scintillator layer; an array of active pixel sensors (APS); at least one internal temperature sensor coupled to at least one pixel; at least two feedback circuits embedded into each pixel; processing electronics configured to allow sampling of said electrical signals by the at least two feedback circuits, and configured to allow corrections corresponding to the measured temperature such that a clean image is produced; and an internal memory unit coupled to the array of APS, and configured to allow storage of correction parameters and of at least two images corresponding to the array of pixels, wherein the radiation detector is configured to acquire at least two images, corresponding to the at least two feedback circuits, and wherein the radiation detector outputs a single, merged image.

RADIATION DETECTION SYSTEM

A radiation detection system that includes a radiation detector, a photo multiplier tube, and a pulse height analyzer. The radiation detector is configured to emit light when exposed to radiation. The photo multiplier tube is configured to convert the light to an electrical signal. The pulse height analyzer is configured to output at least one value associated with an amount of radiation detected based on at least in part on the electrical signal. 1. A radiation detection system comprising:a radiation detector configured to emit light when exposed to radiation;a photo multiplier tube configured to convert the light to an electrical signal encoding brightness of the light; anda pulse height analyzer configured to output at least one value associated with an amount of radiation detected based on at least in part on the electrical signal.2. The radiation detection system of claim 1 , wherein the radiation detector comprises an array of sodium iodide thallium doped scintillation radiation detectors.3. The radiation detection system of claim 1 , wherein the light is emitted as flashes and the electrical signal includes electrical pulses encoding the brightness of the flashes.4. The radiation detection system of claim 3 , wherein each of the electrical pulses has a magnitude or pulse height that corresponds to and encodes the brightness of at least one of the flashes.5. The radiation detection system of claim 4 , wherein the at least one value output by the pulse height analyzer comprises a number of electrical pulses having a predetermined height or being within range of heights detected over a period of time.6. The radiation detection system of claim 4 , wherein the at least one value comprises region values claim 4 , andthe pulse height analyzer is configured to sort the electrical pulses by the pulse height into regions of interest, count a number of the electrical pulses in each of the regions of interest within a unit of time, and output one of the region values for ...

X-ray detector and/or gamma detector with light bias

A detector for X-ray and/or gamma radiation, including at least one radiation source and at least one interlayer in the case of an electrode, wherein a neutralization of trap states at the electrode and rise times and decay times in the millisecond range, as are required for the application, can be achieved by the corresponding arrangement. A method for producing the detector is also disclosed.

SIGNAL READOUT CIRCUIT, SIGNAL READOUT DEVICE, AND SIGNAL READOUT METHOD FOR PHOTODETECTION ELEMENT

A signal readout circuit is a circuit for reading out a signal from a photodetection element having a plurality of photodetection pixels each generating a detection signal according to light incidence, and includes N light incidence detection units (N is an integer of 2 or more) each for inputting the detection signal from each of N photodetection pixels and outputting a signal indicating the light incidence, and a total value detection unit for detecting a total value of the output signals from the N light incidence detection units. Each light incidence detection unit outputs the signal weighted differently corresponding to each photodetection pixel. A weight thereof is set such that the total values are different for respective photodetection pixels and all combination patterns of the photodetection pixels. 1. A signal readout circuit for a photodetection element for reading out a signal from the photodetection element having a plurality of photodetection pixels each generating a detection signal according to light incidence , the circuit comprising:N light incidence detection units (N is an integer of 2 or more) each configured to input the detection signal from each of N photodetection pixels included in the plurality of photodetection pixels and output a signal indicating the light incidence; anda total value detection unit configured to detect a total value of the output signals from the N light incidence detection units, whereineach light incidence detection unit is configured to output the signal weighted differently corresponding to each photodetection pixel, and a weight thereof is set such that the total values are different for respective photodetection pixels and all combination patterns of the photodetection pixels in the N photodetection pixels.2. The signal readout circuit for the photodetection element according to claim 1 , wherein each light incidence detection unit includes a comparator.3. The signal readout circuit for the photodetection element ...

Image-capturing device and electronic device

To improve a temporal resolution. An image-capturing device includes a pixel array unit and a control unit. The pixel array unit includes a plurality of pixels classified into two or more groups, wherein pixels which belong to a same group are driven at a same timing. The control unit controls driving of the pixel array unit so that a number of groups in a period of time of read-out of electrical charge is a same number in any given timing in image-capturing operation, and that a number of groups in a period of time of exposure and accumulation of electrical charge is a same number in any given timing in the image-capturing operation.

Detection device and electronic equipment

The present disclosure relates to a detection device and electronic equipment, in which a detection accuracy of minute light can be improved. A detection device includes: a pixel array portion in which a plurality of first pixels including a photoelectric conversion unit, and a plurality of second pixels not including a photoelectric conversion unit, are arranged; and a driving unit configured to drive the first pixel and the second pixel. The present technology, for example, can be applied to a light detector, a radiation counter device performing radiation counting by using the light detector, and a biological examination device using the light detector, such as a flow cytometer.

Semiconductor Device and Method of Driving the Same

To provide a semiconductor device and a driving method of the same that is capable of enlarging a signal amplitude value as well as increasing a range in which a linear input/output relationship operates while preventing a signal writing-in time from becoming long. The semiconductor device having an amplifying transistor and a biasing transistor and the driving method thereof, wherein an electric discharging transistor is provided and pre-discharge is performed.

Photodetector circuit and semiconductor device

To provide a photodetector circuit capable of obtaining signals in different periods without being affected by characteristics of a photoelectric conversion element. The photodetector circuit has n signal output circuits (n is a natural number of 2 or more) connected to the photoelectric conversion element. Further, the n signal output circuits each include the following: a transistor whose gate potential varies in accordance with the amount of light entering the photoelectric conversion element; a first switching element which holds the gate potential of the transistor; and a second switching element which controls a signal output from the transistor. Thus, after data based on the amount of light entering the photoelectric conversion elements is held as the gate potentials of the transistors, the second switching elements are turned on, whereby signals in different periods can be obtained without being affected by characteristics of the photoelectric conversion element.

Photoelectric conversion element and radiation detector

According to one embodiment, a photoelectric conversion element includes a first conductive layer, a second conductive layer, and an intermediate layer provided between the first conductive layer and the second conductive layer. The intermediate layer includes a first semiconductor region and a second semiconductor region. The first semiconductor region is of an n-type, and the second semiconductor region is of a p-type. The first semiconductor region includes at least one selected from the group consisting of fullerene and a fullerene derivative. The second semiconductor region includes at least one selected from the group consisting of quinacridone and a quinacridone derivative. A ratio of a weight of the second semiconductor region per unit volume to a weight of the first semiconductor region per unit volume in the intermediate layer is greater than 5.

Systems and methods for mimimizing silicon photomultiplier signal propagation delay dispersion and improve timing

A silicon photomultiplier array including a plurality of microcells arranged in subgroupings, each microcell of a respective subgrouping providing a pulse output in response to an incident radiation. Each microcell output interconnected by respective traces of equal length to either a summing node or an integrated buffer amplifier. Each respective summing node configured to sum the pulse outputs of a first subgroup of the microcell subgroupings, and each respective integrated buffer amplifier configured to sum the pulse outputs of each microcell of a second subgrouping, the respective integrated buffer amplifier located on the silicon photomultiplier array within the second subgroup of microcells. The plurality of microcells arranged in one of columns and rows, and a first group of the arranged plurality of microcells being a mirror image of a second group of the arranged plurality of microcells about a midpoint between one of the columns and rows.

Semiconductor Device and Method of Driving the Same

To provide a semiconductor device and a driving method of the same that is capable of enlarging a signal amplitude value as well as increasing a range in which a linear input/output relationship operates while preventing a signal writing-in time from becoming long. The semiconductor device having an amplifying transistor and a biasing transistor and the driving method thereof, wherein an electric discharging transistor is provided and pre-discharge is performed.

Imaging panel and method for producing same

Provided is an X-ray imaging panel in which off-leakage current can be decreased, and a method for producing the same. An imaging panel includes a photodiode that includes a lower electrode, a photoelectric conversion layer 15 provided on the lower electrode, and an upper electrode 14 b provided on the photoelectric conversion layer 15 . The photoelectric conversion layer 15 includes a first amorphous semiconductor layer 151 , an intrinsic amorphous semiconductor layer 152 , and a second amorphous semiconductor layer 153 . In the photoelectric conversion layer 15 , an upper end portion 1531 of the second amorphous semiconductor layer 153 has a protrusion portion 15 a that protrudes toward an outer side of the photoelectric conversion layer 15 with respect to an upper end portion 1521 of the intrinsic amorphous semiconductor layer 152.

Radiation image capturing apparatus

A radiation image capturing apparatus includes: scanning lines and signal lines; radiation detection elements; a scan driver switching a switching element of the radiation detection elements between on and off; and a readout IC incorporating readout circuits reading, as image data, electric charges from each radiation detection element, the readout circuit including: an integrating circuit outputting a voltage value corresponding to the electric charges; a reset switch resetting the integrating circuit; a first sample-and-hold circuit holding, as a reference value, the voltage value before the electric charges flow; a second sample-and-hold circuit holding, as a signal value, the voltage value after the electric charges flow; and a difference circuit outputting difference between the signal value and the reference value, the radiation image capturing apparatus further including a mechanism changing the voltage value from completion of the resetting and turning off of the reset switch until holding of the reference value.

Radiation detecting apparatus, input-output calibration method, and computer program product

According to an embodiment, an apparatus includes a first detector, a second detector, and a controller. The first detector is configured to detect first radiation at a first frequency within a first time by at least a first radiation detecting element and a second radiation detecting element that are positioned near to each other, and output a first signal. The second detector is configured to detect second radiation at a second frequency less than the first frequency within a second time by at least the first radiation detecting element and the second radiation detecting element, and output a second signal. The controller is configured to generate a third signal representing a difference between the first signal and the second signal, and calculate energy using the third signal.

Radiation detector, radiation imaging device, computer tomography device, and radiation detection method

A flat pixel ( 20 ) is a single unit composing a radiation detector and is configured so as to be divided into at least four subpixels ( 21 ) such that even if a prescribed number of subpixels ( 21 ) are removed from each pixel ( 20 ) in order of largest effective area, the centroid ( 51 ) of the effective area of the entirety of the remaining subpixels ( 21 ) is positioned within a similar-shape region ( 30 ) having the same centroid ( 50 ) as the pixel ( 20 ) and having sides of lengths that are half those of the pixel ( 20 ).

Spectroscopic Sensor for Alpha and Beta Particles

A sensor for spectroscopic measurement of alpha and beta particles includes first and second layers, a photomultiplier, and an analyzer. A first material of the first layer scintillates a first stream of photons for each of the alpha particles. However, the beta particles pass through the first layer. A second material of the second layer scintillates a second stream of photons for each of the beta particles, but passes the first stream of photons for each alpha particle. The photomultiplier amplifies the first and second streams of photons for the alpha and beta particles into an electrical signal. The electrical signal includes a respective pulse for each of the alpha and beta particles. From the electrical signal, the analyzer determines a respective energy of each of the alpha and/or beta particles from a shape of the respective pulse for each of the alpha and beta particles.

Packaging of semiconductor x-ray detectors

Disclosed herein is an image sensor comprising: a plurality of packages arranged in a plurality of layers; wherein each of the packages comprises an X-ray detector mounted on a printed circuit board (PCB); wherein the packages are mounted on one or more system PCBs; wherein within an area encompassing a plurality of the X-ray detectors in the plurality of packages, a dead zone of the packages in each of the plurality of layers is shadowed by the packages in the other layers.

Information processing device, radiation detector, radiation imaging device, and program

Provided is a radiation detector that is capable of accurately calculating the time of occurrence of fluorescence. In addition to a configuration that calculates a single signal time, the present invention, in view of the case in which a multiple event occurs, also has a configuration that on the basis of an added signal generated by adding detection signals together, calculates the time of occurrence of fluorescence (added signal time). The radiation detector according to the present invention is configured to output the added signal time as the time of occurrence of fluorescence when the number of detection elements 3a in the fluorescence detection is plural (at the time of a multiple event). In the case of a multiple event, from the viewpoint of strengthening of a signal addition, an added signal time is more accurate than a single signal time.

Apparatus, device and method for measuring breakdown voltage

An apparatus, device and method for measuring a breakdown voltage are disclosed. The apparatus comprises a controlled voltage source ( 122 ), a current detection circuit ( 124 ), and a processing circuit ( 126 ). An output end of the controlled voltage source ( 122 ) is connected to an input end of a sensor unit ( 110 ). The controlled voltage source ( 122 ) is used for providing a series of test bias voltages for the sensor unit ( 110 ). An input end of the current detection circuit ( 124 ) is connected to an output end of the sensor unit ( 110 ). The current detection circuit ( 124 ) is used for detecting a current signal output by the sensor unit ( 110 ) and generating a corresponding detection signal. An input end of the processing circuit ( 126 ) is connected to an output end of the current detection circuit ( 124 ). An output end of the processing circuit ( 126 ) is connected to an input end of the controlled voltage source ( 122 ). The processing circuit ( 126 ) is used for controlling the controlled voltage source ( 122 ) to provide a series of test bias voltages, calculating dark currents respectively corresponding to the series of test bias voltages on the basis of the detection signal, and determining a breakdown voltage of the sensor unit ( 110 ) on the basis of the series of test bias voltages and the dark currents. The apparatus can determine the breakdown voltage of the sensor unit ( 110 ) rapidly, accurately and efficiently.

Charge integrating devices and related systems

An organic charge integrating device is presented. The organic charge integrating device includes a thin film transistor (TFT) array, a first electrode layer disposed on the TFT array, an organic photoactive layer disposed on the first electrode layer, and a second electrode layer disposed on the organic photoactive layer. The organic photoactive layer has a thickness in a range from about 700 nanometers to about 3 microns. An organic x-ray detector is presented. An imaging system including the organic x-ray detector is also presented.

Detector unit for detector array of radiation imaging modality

Among other things, a detector unit for a detector array of a radiation imaging modality is provided. In some embodiments, the detector unit comprises a radiation detection sub-assembly and an electronics sub-assembly. The electronics sub-assembly comprises electronic circuitry, embedded within a molding compound, configured to digitize analog signals yielded from the radiation detection sub-assembly and/or to otherwise process such analog signals. The electronics sub-assembly also comprises a substrate, such as a printed circuit board, configured to route signals between the electronic circuitry and a photodetector array of the radiation detection sub-assembly and/or to route signals between the electronic circuitry and digital processing components, such as an image generator, for example.

Radiation imaging apparatus, method of controlling the same, and radiation imaging system

A radiation imaging apparatus includes a pixel array, a bias line, drive lines, and a driving unit configured to cyclically supply the ON voltage to the drive lines. The apparatus also includes an acquiring unit configured to acquire a plurality of signal values by acquiring a signal value representing a current flowing through the bias line at each of a plurality of times within a period in which the ON voltage is continuously supplied to at least one of the plurality of drive lines, and a processing unit configured to specify an outlier in the plurality of signal values and determine whether or not there is radiation irradiation with respect to the pixel array based on a signal value among the plurality of signal values that is not an outlier, and without being based on the outlier.

Structured detectors and detector systems for radiation imaging

Detector module designs for radiographic imaging include first and second layers of scintillator rods or pixel arrays oriented in first and second directions. The first and second directions are transversely oriented to define a light sharing region between the first and second layers. Encoding features may be disposed in, on or between the first and second layers, and configured to modulate propagation of optical signals therealong or therebetween.

Detach and reattach of a flexible polyimide based x-ray detector

An image sensor array formed on a flexible first substrate is supported by a flexible second substrate attached thereto. The second substrate has a top surface with an adhesive thereon for attaching the substrates together. The adhesive is on a portion of the second substrate directly beneath the image sensor array to allow selective formation of the second substrate.

RADIATION IMAGING APPARATUS AND RADIATION IMAGING SYSTEM

An imaging region including a plurality of detection elements each including a conversion element configured to convert radiation into an electric signal, a first signal line, and a signal processing circuit configured to process a signal output via the first signal line, wherein the plurality of detection elements include a first detection element and a second detection element which are connected to the first signal line, a sensitivity of the first detection element to radiation is set to be different from a sensitivity of the second detection element to radiation, and the signal processing circuit generates information related to irradiation of radiation to the imaging region based on signals from the first detection element and the second detection element which are connected to the first signal line. 1. A radiation imaging apparatus comprising:an imaging region including a plurality of detection elements each including a conversion element configured to convert radiation into an electric signal;a first signal line; anda signal processing circuit configured to process a signal output via the first signal line,wherein the plurality of detection elements include a first detection element and a second detection element which are connected to the first signal line,a sensitivity of the first detection element to radiation is set to be different from a sensitivity of the second detection element to radiation, andthe signal processing circuit generates information related to irradiation of radiation to the imaging region based on signals from the first detection element and the second detection element which are connected to the first signal line.2. The radiation imaging apparatus according to claim 1 , whereinthe radiation imaging apparatus includes a scintillator configured to convert radiation into light, andthe conversion element includes a photoelectric conversion element configured to convert the light into an electric signal.3. The radiation imaging apparatus ...

Gap resolution for linear detector array

An imaging system generates a first radiograph based on a first pattern of radiation detected by a Linear Diode Array (LDA) radiation detector positioned to detect a radiation beam emitted by a radiation generator. The LDA radiation detector comprises a plurality of modules. Each respective module of the plurality of modules comprises a respective plurality of photodiodes corresponding to pixels. Furthermore, the imaging system may determine, based on the first radiograph, a size of a gap between two of the modules of the LDA radiation detector. After determining the size of the gap, the imaging system may generate a second radiograph based on a second pattern of radiation detected by the LDA radiation detector. The imaging system may generate a third radiograph by modifying, based on the size of the gap, the second radiograph to compensate for the gap.

Signal processor and radiation detection device

According to an embodiment, a signal processor includes an integrator, a differentiator, a zero cross detector, a pile-up detector, an event interval detector, a counter, and a creator. The integrator is configured to calculate charge of current from a photoelectric converter for an incident radiation. The differentiator is configured to calculate a differential value of the current. The zero cross detector is configured to detect a zero cross of the differential value. The pile-up detector is configured to detect pile-up of the current based on the zero cross. The event interval detector is configured to detect, based on the zero cross and pile-up, an event interval of the radiation entering. The counter is configured to count, based on the charge and pile-up, the respective numbers of events according to the charge and the event interval. The creator is configured to create histograms for the numbers of events.

Imaging Radiation Detector Array

An imaging radiation detection system, useful in detecting and localizing radioactive materials, may include a large number of particle detectors stacked in a two-dimensional array. The array may include protruding detectors interleaved with recessed detectors, in which each detector is oriented in a different direction. The array may have a checkerboard-type arrangement of protruding and recessed detectors. Detection data from the recessed detectors may include a radiographic image indicating the distribution of radioactive sources in view. Embodiments with high detection efficiency and large field of view can rapidly detect and localize even well-shielded threat sources at substantial distances.

Positron emission tomography detecting device

A PET detecting device may include a plurality of detection modules and a processing engine. Each of the plurality of detection modules may include a scintillator array, one or more photoelectric converters, one or more energy information determination circuits and a time information determination circuit. The scintillator array may interact with a plurality of photons at respective interaction points to generate a plurality of optical signals. The one or more photoelectric converters may convert the plurality of optical signals to one or more electric signals that each include an energy signal and a time signal. The one or more energy information determination circuits may generate energy information based on the one or more energy signals. The time information determination circuit may generate time information based on the one or more time signals. The processing engine may generate an image based on the energy information and the time information.

RADIATION DETECTOR, RADIOGRAPHIC IMAGING DEVICE, AND RADIATION DETECTOR MANUFACTURING METHOD

A radiation detector includes a flexible substrate, plural pixels provided on the substrate and each including a photoelectric conversion element, a scintillator stacked on the substrate and including plural columnar crystals, and a bending suppression member configured to suppress bending of the substrate. The bending suppression member has a rigidity that satisfies R≥L−r/tan Φ+4r·{(L−r/tan Φ)−(d/2)}/d, wherein L is an average height of the columnar crystals, r is an average radius of the columnar crystals, d is an average interval between the columnar crystals, Φ is an average tip angle of the columnar crystals, and R is a radius of curvature of bending occurring in the substrate due to the weight of the scintillator.

阵列基板、x射线平板探测器及x射线探测方法

本公开提供了一种阵列基板、X射线平板探测器及X射线探测方法。阵列基板包括：衬底基板，包括感应区和辅助区；多个感应TFT，按矩阵形式布置在所述感应区；多条信号读取线和多条栅线，纵横交叉的设置在所述感应区，其中，位于同一列的感应TFT的第一极电连接到同一条信号读取线，位于同一行的感应TFT的栅极电连接到同一条栅线；补偿TFT行，设置在辅助区，补偿TFT行中的各个TFT分别对应多个感应TFT的不同列，并且补偿TFT的第一极分别与其所对应列中的感应TFT电连接到相同的信号读取线；以及补偿栅线，连接补偿TFT行中的每个补偿TFT的栅极。补偿TFT的从源极到漏极的方向与该补偿TFT连接相同信号读取线的感应TFT的从源极到漏极的方向相反。

用于tof-pet的数字硅光电倍增管

辐射检测器(10)包括检测器像素(22)阵列，每个检测器像素(22)包括检测器单元(50，50’，50”)阵列。每个检测器单元包括在击穿区域偏压的光电二极管(52)和与光电二极管耦合的数字电路(54，54’，54”)，该数字电路被配置为输出静态下的第一数字值和响应光电二极管的光子检测的第二数字值。数字触发电路(60，60’，60”，84)被配置为响应所选数目的一个或多个检测器单元从第一数字值转变为第二数字值而输出指示积分时间周期开始的触发信号。读出数字电路(66，82)累加检测器单元阵列的检测器单元的在积分时间周期中从第一数字态到第二数字态的多次转变的计数。

The detector device of pixelation

本发明涉及一种像素化的探测器，其具有增强的结构以使得即使在晶体边缘具有高的光输出的情况下也能够容易地进行像素识别。闪烁体晶体（50）和探测器像素（12）之间的半像素移位使得能够在串光的情况下通过四个探测器像素（12）而不是九个像素来识别晶体（50）。无任何机械结构的玻璃板可以用作探测器和闪烁体的公共基底（60）。

For phase-contrast and/or the X-ray detector of dark-field imaging

本发明涉及X射线成像。为了减少X射线图像采集期间的X射线剂量曝光，提供了适于相位对比和/或暗场成像的X射线探测器。所述X射线探测器包括闪烁体层(12)和光电二极管层(14)。闪烁体层被配置为将由相位光栅结构(18)调制的入射X射线辐射(16)转换为要由光电二极管层探测的光。闪烁体层包括周期性地布置有间距(22)的闪烁体通道(20)的阵列以形成分析器光栅结构。闪烁体层和光电二极管层形成包括像素(26)的矩阵的第一探测器层(24)。每个像素包括光电二极管(28)的阵列，每个光电二极管形成子像素(30)。操作期间邻近子像素接收具有相互移位的相位的信号。在操作期间接收具有相互相同的相位的信号的子像素形成每像素的相位组。在操作期间由每像素的相同相位组内的子像素接收的信号被组合以提供一个相位组信号(32)。在一个图像采集中获得操作期间的不同相位组的相位组信号。在范例中，通过将校正因子c应用于由相位光栅结构创建的周期性干涉图样(35)的条纹周期(P 条纹 )来使闪烁体通道的间距失谐，其中，0<c<2。

Radiation imaging device

【課題】放射線信号を精度よく補正するための技術を提供する。【解決手段】放射線撮像装置は、複数の画素行及び複数の画素列を構成するように配置され、複数の第１画素と、複数の第１画素よりも放射線に対する感度が低い複数の第２画素とを含む、複数の画素と、複数の画素列に対応して配置された複数の信号線と、複数の信号線を通じて複数の画素から信号を読み出す読み出し回路と、複数の第２画素から読み出された複数の信号を用いて補正値を決定し、複数の第１画素から読み出された複数の信号を、補正値を用いて補正する処理部と、を備える。読み出し回路の内部構造は周期を有する。複数の第２画素は、複数の第２画素を含む画素列の列番号を周期で割った余りが２種類以上となるように配置されている。【選択図】図８

Fast scan reset for a large area x-ray detector

A large area solid state x-ray detector employs a plurality of cells arranged in rows and columns composed of photodiodes that are charged, exposed to x-rays which deplete their charge in proportion to the exposure, and then recharged to determine the amount of exposure. Fast scanning of the photodiodes consistent with the reduction of dark current effects is obtained without ghost images by employing a non-imaging scan following the imaging scan. The non-imaging scan employs a greater proportion of each scan duration for charge restoration than the imaging scan. In one embodiment simultaneous non-imaging recharging of the photodiodes is performed to substantially reduce this non-imaging time.

X-ray detection system using active pixel sensors

An x-ray detector includes a scintillator that converts an invisible-radiant-energy image into a visible-light image and a sensor array that converts the visible-light image into an electrical signal. The sensor array comprises a plurality of CMOS active pixel sensors.

Thin-film, flat panel, pixelated detector array for real-time digital imaging and dosimetry of ionizing radiation

A thin-film, flat panel, pixelated detector array serving as a real-time digital imager and dosimeter for diagnostic or megavoltage X rays or gamma rays, including a plurality of photodiodes made of hydrogenated amorphous silicon arrayed in columns and rows upon a glass substrate. Each photodiode is connected to a thin film field effect transistor also located upon the glass or quartz substrate. Upper and lower metal contacts are located below and above the photodiodes to provide the photodiodes with a reverse bias. The capacitance of each photodiode when multiplied by the resistance of the field effect transistor to which it is connected yields an RC time constant, τ RC , sufficiently small to allow fluoroscopic or radiographic imaging in real time. Specifically, ##EQU1## where P=the pixel-pixel pitch in μm, where ˜25≦p≦˜10,000, L=the length, in cm, of one column of pixels sensors of the array, where ˜2≦L≦˜60, IFPS=instantaneous frame rate per second which is the effective rate at which the array is being readout, where ˜1≦IFPS≦˜500, and SN=the inverse of the degree to which each pixel sensor needs to be sampled and thus recharged, where ˜10≦SN≦˜10,000.

Method for reading out data from an x-ray detector

An x-ray detector includes a scintillator that converts an invisible-radiant-energy image into a visible-light image and a sensor array that converts the visible-light image into an electrical signal. The sensor array comprises a plurality of CMOS active pixel sensors.

PIXELED DETECTOR DEVICE

1. Пикселированное детекторное устройство, содержащее:матрицу детекторов, имеющую множество детекторных пикселей (12); иматрицу кристаллов, имеющую множество сцинтилляторных кристаллов (50) и расположенную в геометрическом соответствии с матрицей детекторов;при этом упомянутые детекторные пиксели (12) и упомянутые сцинтилляторные кристаллы (50) сдвинуты в по меньшей мере одном измерении по отношению друг к другу на, по существу, половину размера сцинтилляторных кристаллов (50).2. Устройство по п. 1, в котором упомянутые детекторные пиксели (12) и упомянутые сцинтилляторные кристаллы (50) имеют один и тот же размер и сдвинуты по отношению друг к другу на, по существу, половину их размера в обоих измерениях.3. Устройство по п. 1, дополнительно содержащее общую подложку (60), используемую как для матрицы детекторов, так и матрицы кристаллов.4. Устройство по п. 1, в котором упомянутые детекторные пиксели (12) размещены с шагом, который является отличающимся от шага сцинтилляторных кристаллов (50).5. Устройство по п. 1, в котором два соседних пикселя (70) из упомянутых детекторных пикселей (12) объединены так, чтобы образовать блочную структуру упомянутой матрицы детекторов.6. Устройство по п. 1, в котором упомянутые детекторные пиксели (72) в четыре раза больше, чем упомянутые сцинтилляторные кристаллы (50), и при этом один сцинтилляторный кристалл центрирован над одним детекторным пикселем.7. Устройство по п. 1, в котором детекторные пиксели на краях упомянутой матрицы детекторов уменьшены вдвое в размере.8. Устройство по п. 1, дополнительно содержащее отражатель (30), обеспеченный между упомянутыми детекторными пикселями (12).9. Способ производств РОССИЙСКАЯ ФЕДЕРАЦИЯ (19) RU (11) (51) МПК G01T 1/20 (13) 2013 113 285 A (2006.01) ФЕДЕРАЛЬНАЯ СЛУЖБА ПО ИНТЕЛЛЕКТУАЛЬНОЙ СОБСТВЕННОСТИ (12) ЗАЯВКА НА ИЗОБРЕТЕНИЕ (21)(22) Заявка: 2013113285/28, 18.08.2011 (71) Заявитель(и): КОНИНКЛЕЙКЕ ФИЛИПС ЭЛЕКТРОНИКС Н.В. (NL) Приоритет(ы): (30) Конвенционный приоритет: 26.08.2010 EP ...

A X-ray detector, a method for controlling the same, and a X-ray photographing system

본 발명의 일 실시예의 일 측면에 따르면, 엑스레이 제너레이터(X-ray generator)로부터 조사된 엑스레이를 수광하여 피사체를 촬상하는 엑스레이 검출기에 있어서, 엑스레이를 감지하여 상기 엑스레이의 투과량에 대응하는 전기적인 검출 신호를 생성하는 포토다이오드(photo diode) 및 상기 검출 신호를 전달하는 스위칭 소자를 포함하는 복수의 광감지 화소들; 상기 스위칭 소자에 상기 스위칭 소자를 턴 온시키는 게이트 펄스를 공급하는 게이트 드라이버; 및 상기 복수의 광감지 화소들로부터 상기 검출 신호를 리드아웃하는 리드아웃 집적회로를 포함하고, 상기 게이트 드라이버 및 상기 리드아웃 집적회로는, 상기 엑스레이 제너레이터를 예열시키도록 하는 엑스레이 예열 제어신호에 응답하여, 상기 복수의 광감지 화소들을 초기화시키도록 구성된, 엑스레이 검출기가 제공된다. According to an aspect of the embodiment of the present invention, there is provided an X-ray detector for receiving an X-ray irradiated from an X-ray generator to pick up an image of the object, A plurality of photodetecting pixels including a photodiode for generating a detection signal and a switching element for transmitting the detection signal; A gate driver for supplying a gate pulse to the switching element to turn on the switching element; And a lead-out integrated circuit for reading out the detection signal from the plurality of photo-sensing pixels, wherein the gate driver and the lead-out integrated circuit are arranged in response to an x-ray warming control signal for preheating the x- And an X-ray detector configured to initialize the plurality of photo-sensing pixels.

Radiation detection device with an analyzer in the housing and how to use it

Device and system for radiation detection

一种用于检测放射线的放射线检测设备。基底(1)在第一表面上具有转换元件。转换元件被配置为将放射线转换为电荷。读出电路被连接到第一区域。所述第一区域包括第一表面的第一边。驱动电路被连接到除第一区域之外的第二区域。所述第二区域包括第一表面的第二边。光源(4)被布置在面向第一表面的第二表面侧。将光源(4)布置为面向除了第一区域之外的第二表面侧的任何区域。

Scintillator based X-ray sensitive integrated circuit element with depleted electron drift region

描述了一种集成电路设计和制造其的方法，用于高效率、低噪声、位置敏感的X射线检测，尤其是用于医疗应用。该装置(350)基于用X射线敏感闪烁体材料填充的深凹陷(354)。在衬底(352)的分开两个相邻的凹陷(354)的侧壁的表面上形成浅的第一电极(360)。该侧壁电极(360)与特定的前侧晶片电极(363)结合造成：整个装置(350)的完全耗尽，并朝向低电容读出电极(363)移动信号电荷。所述的集成电路元件(350)确保了不依赖深度的高的光收集效率。

Hybrid Radiation Detection Apparatus using Pixel Type Scintillation Structure

본 발명은 감마선 등의 진단 방사선이나 고 에너지의 방사선 분야에 효과적으로 적용하기 위하여, 픽셀형으로 제조된 섬광체 구조물을 이용하는 하이브리드 방사선 검출 장치에 관한 것이다. 본 발명의 일면에 따른 하이브리드 방사선 검출 장치는, 어레이 형태의 복수의 픽셀 센서를 가지는 이미지 센서, 및 상기 이미지 센서의 상부에 부착되고, 상기 복수의 픽셀 센서에 대응되도록 격벽으로 구분된 복수의 픽셀형 섬광체를 가지는 픽셀형 섬광체 구조물을 포함하고, 상기 복수의 픽셀형 섬광체가 각각 방사선을 받아 가시광으로 변환하고, 상기 복수의 픽셀 센서가 각각 해당 픽셀형 섬광체로부터의 가시광에 비례하여 광전도체에서 전자-정공을 발생하고, 독출 회로를 이용해 상기 발생된 전자-정공에 대응하는 전기적 신호를 독출하는 것을 특징으로 한다. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hybrid radiation detection apparatus using a scintillator structure manufactured in the form of a pixel in order to be effectively applied to diagnostic radiation such as gamma rays or high energy radiation. According to an aspect of the present invention, a hybrid radiation detection apparatus includes an image sensor having a plurality of pixel sensors in an array, and a plurality of pixel types attached to an upper portion of the image sensor and divided into partitions to correspond to the plurality of pixel sensors. A pixelated scintillator structure having a scintillator, wherein the plurality of pixelated scintillators each receive radiation and convert it into visible light, and the plurality of pixel sensors are each electron-hole in the photoconductor in proportion to the visible light from the corresponding pixelated scintillator And reading an electrical signal corresponding to the generated electron-hole using a reading circuit.

The method of the level gauging of actinometry mode and level gauging equipment

本发明涉及辐射测量方式的料位测量的方法和料位测量设备。所提出的辐射测量方式的料位测量设备具有闪烁器装置103和两个光子计数器101、102。通过这两个光子计数器101、102产生的测量信号能够彼此比较。由此能够提高测量信号的测量精度和稳定性。

X-ray detector and/or gamma detector with light bias

본 발명은 전극에서 하나 이상의 방사선원 및 하나 이상의 개재층을 포함하는 X선 방사선 및/또는 감마선 방사선용 검출기 및 검출기 제조 방법에 관한 것이며, 상응하는 배열에 의해, 전극에서의 트랩 상태(trap states)의 중화 및 응용을 위해 필요한 밀리미터 초 범위 내의 상승 시간 및 하강 시간이 달성될 수 있다.

High resolution position sensitive detector

A high spatial resolution gamma ray detector employs layers of scintillators, microchannel photomultipliers and sensors arrays of anodes to provide real time imaging of nuclear sources. Specific embodiments include a camera for detecting nuclear weapons within opaque containers and a device for discriminating exoatmospheric reentry vehicles from decoys.

Radiation imaging apparatus

A radiation imaging apparatus includes pixels arranged to form pixel rows and pixel columns. The pixels include first pixels and second pixels whose sensitivity to radiation is lower than the first pixels. The apparatus further includes a signal lines arranged to correspond to the pixel columns, a readout circuit configured to read out a signal from the pixels via the signal lines, and a processing unit configured to decide a correction value using signals read out from the second pixels and correct signals read out from the first pixels using the correction value. An internal structure of the readout circuit has a period. The second pixels are arranged such that there are two or more types of remainders of column numbers of pixel columns that include the second pixels divided by the period.

Detection of radiation quanta using an optical detector pixel array and pixel cell trigger state sensing circuits

A radiation detection device integrates the number of optical photons in a light pulse. The radiation detection device includes an optical detector pixel array which has a plurality of pixel cells that are triggered by optical photons, a plurality of pixel cell trigger state sensing circuits, and a summing unit. Each pixel cell trigger state sensing circuit generates a digital signal having either a first predetermined amplitude indicative of a triggered pixel cell, or a second predetermined amplitude indicative of a non-triggered pixel cell. The summing unit generates an analog signal whose amplitude corresponds to the number of triggered pixel cells and thereby performs the integration. The analog signal may further cause a timing unit to generate a timestamp when a predetermined accumulated optical photon count condition is met.

METHOD FOR CONTROLLING A PHOTOSENSITIVE DEVICE

La présente invention concerne un procédé de commande d'un dispositif photosensible (1, 1') comprenant une matrice (2, 20) de points photosensibles (P1 à P9) repartis aux intersections de lignes (SY1 à SY3) et de colonnes (X1 à X3) de la matrice (2, 20). L'invention concerne plus particulièrement (mais non exclusivement) la commande de tels dispositifs utilisés pour la détection d'images radiologiques. Le procédé consiste à soumettre la matrice (2, 20) à un cycle d'image comprenant une phase d'initialisation précédent une phase de prise d'image. Les lignes de la matrice (2, 20) sont réparties en plusieurs groupes, et durant la phase d'initialisation, le procédé consiste à remettre à zéro simultanément toutes les lignes d'un même groupe et à remettre à zéro successivement chaque groupe de lignes. The present invention relates to a method for controlling a photosensitive device (1, 1 ') comprising a matrix (2, 20) of photosensitive points (P1 to P9) distributed at the intersections of rows (SY1 to SY3) and columns (X1 at X3) of the matrix (2, 20). The invention relates more particularly (but not exclusively) to the control of such devices used for the detection of radiological images. The method consists in subjecting the matrix (2, 20) to an image cycle comprising an initialization phase preceding an image taking phase. The rows of the matrix (2, 20) are divided into several groups, and during the initialization phase, the method consists in simultaneously resetting all the rows of the same group and in successively resetting each group of rows .

Digital detector with superimposed conversion stages

L’invention concerne un détecteur numérique (100) comprenant : un bloc de conversion (110) destiné à convertir un rayonnement incident en charges électriques ;une carte électronique (50) assurant la conversion des charges électriques en une image digitale, le bloc de conversion (110) comprenant N étages de conversion (111-1, 111-2, 111-3, 111-4) superposés les uns sur les autres, N étant un nombre entier compris entre 2 et M, chacun des N étages de conversion comprenant : un substrat monolithique ;un premier ensemble convertisseur (133) sous forme d’une matrice polygonale, M étant le nombre de côtés de la matrice polygonale, M étant préférentiellement égal à 4, et configurée de façon à générer les charges électriques en fonction du rayonnement incident ;un module (114) d’adressage et de pilotage de la matrice, ledit module d’adressage et de pilotage étant disposé sur le substrat monolithique le long d’un côté de la matrice polygonale ; chacun des N étages de conversion (111-1, 111-2, 111-3, 111-4) étant orienté d’au moins 1/M-ème de tour par rapport aux N-1 autres étages de conversion du bloc de conversion (110), et d’orientation distincte des N-1 autres étages de conversion du bloc de conversion (110). Figure pour l’abrégé: Fig. 2

METHOD AND SYSTEM FOR BI OR MULTI-ENERGETIC IMAGING

AX-ray detector and Method thereof

본 발명은 엑스레이 검출기 및 엑스레이 검출기 구동 방법을 개시한다. 본 발명의 엑스레이 검출기는, 엑스레이에 대응하는 전기적 신호를 생성하는 제1 포토 다이오드와, 게이트 신호에 의해 온되어 상기 제1 포토 다이오드로부터의 전기적 신호를 데이터 라인을 통해 출력하는 제1 스위칭 소자를 포함하는 다수의 광감지 픽셀; 및 엑스레이에 대응하는 전기적 신호를 생성하는 제2 포토 다이오드와, 게이트 신호에 무관하게 오프 상태를 유지하며 상기 제2 포토 다이오드로부터의 전기적 신호가 데이터 라인을 통해 출력되는 것을 차단하는 제2 스위칭 소자를 포함하는 다수의 더미 픽셀;을 포함할 수 있다. The present invention discloses an x-ray detector and a method of driving an x-ray detector. The x-ray detector of the present invention includes a first photodiode for generating an electrical signal corresponding to an x-ray, and a first switching element which is turned on by a gate signal and outputs an electrical signal from the first photodiode through a data line A plurality of light-sensing pixels; A second photodiode for generating an electrical signal corresponding to the X-ray, and a second switching element for maintaining the off state regardless of the gate signal and for preventing the electrical signal from the second photodiode from being output through the data line A plurality of dummy pixels including a plurality of dummy pixels.

ELECTRONIC LOAD INJECTION CIRCUIT FOR A RADIATION DETECTOR

L'invention concerne un circuit électronique de lecture pour un détecteur de rayonnement comprenant: • un élément sensible (11) au rayonnement, • un circuit d'injection, apte à injecter une charge à une borne de l'élément sensible (11), le circuit d'injection (14) s'étendant entre au moins une borne d'entrée et une borne de sortie, la borne de sortie étant apte à être connectée audit élément sensible (11), le circuit d'injection (14) étant apte à produire une charge sous l'effet d'une impulsion de déclenchement. Le circuit d'injection est apte à injecter une première charge lorsqu'une borne d'entrée est raccordée à un premier potentiel d'entrée et une deuxième charge lorsqu'une borne d'entrée est raccordée à un deuxième potentiel d'entrée (V , Phi )). Le circuit comporte un moyen de mémorisation d'une différence entre un potentiel de sortie du circuit d'injection (14), dit potentiel d'équilibre, et un potentiel de référence, de telle sorte que la deuxième charge dépende du deuxième potentiel d'entrée et dudit potentiel d'équilibre. The invention relates to an electronic reading circuit for a radiation detector comprising: • an element sensitive (11) to radiation, • an injection circuit, capable of injecting a charge at a terminal of the sensitive element (11), the injection circuit (14) extending between at least one input terminal and an output terminal, the output terminal being able to be connected to said sensitive element (11), the injection circuit (14) being capable of producing a charge under the effect of a trigger pulse. The injection circuit is capable of injecting a first charge when an input terminal is connected to a first input potential and a second charge when an input terminal is connected to a second input potential (V , Phi )). The circuit comprises a means of memorizing a difference between an output potential of the injection circuit (14), called equilibrium ...

Radiation image capturing device, radiation image capturing system, computer readable medium and radiation image capturing device control method

本发明涉及放射线图像摄影装置及其控制方法、放射线图像摄影系统。一种放射线图像摄影装置设置有多个像素、检测装置以及控制装置。像素各设置有传感器部和读出在传感器部生成的电荷并且将该电荷输出至信号线的开关元件。所述检测装置在与该电荷相对应的电信号满足用于照射检测的预定条件的情况下，检测到照射开始。在检测到放射线的照射开始之后，控制装置获得与所述电荷相对应的电信号并且判断所获得的电信号是否包括噪声导致的电信号。所述控制装置在包括噪声导致的电信号的情况下，控制报告装置以报告此情况。

Virtual pet detector and quasi-pixelated readout scheme for pet

When designing detector arrays for diagnostic imaging devices, such as PET or SPECT devices, a virtual detector, or pixel, combines scintillator crystals with photodetectors in ratios that deviate from the conventional 1:1 ratio. For instance, multiple photodetectors can be glued to a single crystal to create a virtual pixel which can be software-based or hardware-based. Light energy and time stamp information for a gamma ray hit on the crystal can be calculated using a virtualizer processor or using a trigger line network and time-to-digital converter logic. Additionally or alternatively, multiple crystals can be associated with each of a plurality of photodetectors. A gamma ray hit on a specific crystal is then determined by a table lookup of adjacent photodetectors that register equal light intensities, and the crystal common to such photodetectors is identified as the location of the hit.

ELECTRONIC LOAD INJECTION CIRCUIT FOR A RADIATION DETECTOR

L'invention concerne un circuit électronique de lecture pour un détecteur de rayonnement comprenant: • un élément sensible (11) au rayonnement, • un circuit d'injection, apte à injecter une charge à une borne de l'élément sensible (11), le circuit d'injection (14) s'étendant entre au moins une borne d'entrée et une borne de sortie, la borne de sortie étant apte à être connectée audit élément sensible (11), le circuit d'injection (14) étant apte à produire une charge sous l'effet d'une impulsion de déclenchement. Le circuit d'injection est apte à injecter une première charge lorsqu'une borne d'entrée est raccordée à un premier potentiel d'entrée et une deuxième charge lorsqu'une borne d'entrée est raccordée à un deuxième potentiel d'entrée (Vinj2, Phiinj)). Le circuit comporte un moyen de mémorisation d'une différence entre un potentiel de sortie du circuit d'injection (14), dit potentiel d'équilibre, et un potentiel de référence, de telle sorte que la deuxième charge dépende du deuxième potentiel d'entrée et dudit potentiel d'équilibre. The invention relates to an electronic reading circuit for a radiation detector comprising: a radiation sensitive element (11), an injection circuit, capable of injecting a charge into a terminal of the sensitive element (11), the injection circuit (14) extending between at least one input terminal and one output terminal, the output terminal being adapted to be connected to said sensing element (11), the injection circuit (14) being capable of producing a charge under the effect of a trigger pulse. The injection circuit is adapted to inject a first charge when an input terminal is connected to a first input potential and a second load when an input terminal is connected to a second input potential (Vinj2 , Phiinj)). The circuit comprises means for storing a difference between an output potential of the injection circuit (14), said equilibrium ...

Solid state radiation detection panel having tiled photosensitive detectors arranged to minimize edge effects between tiles

A solid state radiation detection panel adapted to receive radiation, having a plurality of modules positioned immediately adjacent each other, with each of the plurality of modules having an array of photosensitive detectors arranged in a plurality of rows and columns, each of the photosensitive detectors having a radiation sensitive area; and circuit means for selectively addressing one of the photosensitive detectors by addressing one of the plurality of rows and one of the plurality of columns and reading the output of the one of the array of photosensitive detectors where each of the plurality of modules being arranged in a three dimensional structure in which the array of photosensitive detectors is arranged on a planar first surface of the module covering substantially the entire area of the planar first surface. The circuit means is located within the module in an area away from the planar first surface opposite from the received radiation. Photosensitive detectors located along an edge of the module having non-radiation sensitive circuitry located opposite the edge from the radiation sensitive area. The radiation sensitive area of the edge photosensitive detectors are smaller than the radiation sensitive area of the inside photosensitive detectors and the center to center distance of the radiation sensitive area of adjacent photosensitive detectors is maintained substantially constant between adjacent edge photosensitive detectors as adjacent inside photosensitive detectors. The module further has a pin diode along the edge of the module.

Radiation detector to determine a depth of interaction and method of using the same

A radiation detector can include a logic element configured to determine a depth of interaction based on a decay time corresponding to a radiation event and a constituent concentration profile of a radiation-sensing member. In another aspect, a method of detecting radiation can include determining a depth of interaction based on a decay time corresponding to a radiation event and a constituent concentration profile of a radiation-sensing member. The radiation detector and method can be useful in applications where depth of interaction is significant. The radiation-sensing member may include a variety of different materials, and is particularly well suited for alkali metal halides.

Method for correcting image from sequence of X-ray images e.g., for computer tomography, involves subtracting corrected image elements with dimensions exceeding specified threshold

Die Erfindung betrifft ein Verfahren zur Korrektur eines Bildes aus einer Folge von mit einem Röntgendetektor (1) aufgenommenen Bildern, wobei der Röntgendetektor (1) eine Vielzahl an Detektorelementen (2) aufweist und ein aufgenommenes Bild sich aus den Detektorelementen (2) zugeordneten Bildelementen zusammensetzt, wobei in einem Detektorelement (2) durch Röntgenstrahlung eine Folge von Detektorsignalen (D¶n¶, D¶n-1¶, D¶n-2¶, D¶n-3¶) erzeugt wird, die jeweils eine Detektor-spezifische, zeitliche Abklingkurve aufweisen, wobei ein zu korrigierendes, über ein vorgegebenes Aufnahmeintervall (DELTAt¶n¶, DELTAt¶n-1¶, DELTAt¶n-2¶, DELTAt¶n-3¶) aufgenommenes Bildelement (3) sich aus während dieses Aufnahmeintervalls (DELTAt¶n¶, DELTAt¶n-1¶, DELTAt¶n-2¶, DELTAt¶n-3¶) erfassten Signalanteilen (S¶n¶, S¶n-1¶, S¶n-2¶, S¶n-3¶) des aktuellen (D¶n¶) und vorangehender Detektorsignale (D¶n-1¶, D¶n-2¶, D¶n-3¶) zusammensetzt. Indem im Aufnahmeintervall (DELTAt¶n¶, DELTAt¶n-1¶, DELTAt¶n-2¶, DELTAt¶n-3¶) erfasste Signalanteile (S¶n-1¶, S¶n-2¶, S¶n-3¶) vorangehender Detektorsignale (D¶n-1¶, D¶n-2¶, D¶n-3¶) berechnet und vom zu korrigierenden Bildelement (3) subtrahiert werden, wird ein Verfahren bereitgestellt, welches die Bildqualität eines Bildes aus einer Serie von mit einer digitalen Bildaufnahmeeinrichtung aufgenommenen Bildern verbessert.

Medical Diagnostic-imaging apparatus

A medical diagnostic-imaging apparatus of an embodiment includes plural converters and processing circuitry. The converters output an electrical signal based on an incident radioactive ray. The processing circuitry identifies a first signal intensity that is a signal intensity corresponding to a peak of the number of the radioactive rays based on a relationship between a signal intensity of an electrical signal output from the convertor and the number of incident radioactive rays, for each of the converters. The processing circuitry identifies a second signal intensity that is a signal intensity corresponding to energy of a radioactive ray that has entered therein without scattering, based on a relationship between the signal intensity and the number of radioactive rays in a higher intensity than the first signal intensity. The processing circuitry corrects a signal intensity of an electrical signal that is output from the respective converters such that the second signal intensity identified for each of the converters matches with a target signal intensity.

X-ray detector with radiation hard photodiode design

A photodetector for X-ray applications is disclosed incorporating a photodiode design with reduced leakage at each pixel location. The photodiode is of a reduced surface area and has a peripheral edge of reduced length. The length may be minimized by making the photodiode round. The diode is surrounded by a reflective layer that may act as a contact for the diode. Photons are reflected by the reflective layer back towards the reduced area diode to maintain good sensitivity. The reflective/contact layer may form a capacitor with another contact layer by disposing a dielectric layer therebetween, thereby increasing the effective capacitance of the photodiode.

Detector and method of operation

A method of operation of a scintillator detector comprising a scintillator and a photodetector is described, together with a device embodying the method. The method comprises the steps of: periodically producing a light pulse; impinging at least some of the light from a successive plurality of such light pulses onto a light- receptive part of the photodetector; measuring the electrical response of the photodetector; processing the electrical response of the photodetector to determine a pulse height and a variance of pulse height; numerically processing the pulse height and variance of pulse height so determined to obtain at least a first data item characteristic of the response of the photodetector. The method additionally or alternatively comprises the steps of: periodically producing a light pulse including light in the ultraviolet spectrum; impinging at least some of the UV light from a successive plurality of such light pulses onto a light-receptive part of the scintillator; inducing photon emission in the scintillator in the visible spectrum; measuring the electrical response of the scintillator; processing the electrical response of the scintillator to obtain at least a data item characteristic of the response of the scintillator; and optionally verifying the electrical response of the scintillator by comparing at least the said data item against a predetermined reference response; and optionally additionally or alternatively outputting a control signal to the photodetector, which signal is modified in part responsive at least to the value of the said data item.

Solid state radiation detection panel having tiled photosensitive detectors arranged to minimize edge effects between tiles

A solid state radiation detection panel adapted to receive radiation, having a plurality of modules positioned immediately adjacent each other, with each of the plurality of modules having an array of photosensitive detectors arranged in a plurality of rows and columns, each of the photosensitive detectors having a radiation sensitive area; and circuit means for selectively addressing one of the photosensitive detectors by addressing one of the plurality of rows and one of the plurality of columns and reading the output of the one of the array of photosensitive detectors where each of the plurality of modules being arranged in a three dimensional structure in which the array of photosensitive detectors is arranged on a planar first surface of the module covering substantially the entire area of the planar firstsurface. The circuit means is located within the module in an area away from the planar first surface opposite from the received radiation. Photosensitive detectors located along an edge of the module having non-radiation sensitive circuitry located opposite the edge from the radiation sensitive area. The radiation sensitive area of the edge photosensitive detectors are smaller than the radiation sensitive area of the inside photosensitive detectors and the center to center distance of the radiation sensitive area of adjacent photosensitive detectors is maintained substantially constant between adjacent edge photosensitive detectors as adjacent inside photosensitive detectors. The module further has a p/n diode along the edge of the module.

Radiation image detecting device and drive control method thereof

An FPD is provided with an ammeter for measuring current on a wired connection of a bias line that applies a bias voltage to pixels. A control circuit compares the measured value of the ammeter and a threshold value. When the measured value of the ammeter is equal to or larger than the threshold value, the control circuit judges that an emission of X-rays from an X-ray source is started. Until before the start of the X-ray irradiation is detected, the control circuit stops supplying electric power to a signal processing circuit, and turns on all TFTs. Once the start of the X-ray irradiation is detected, the control circuit turns off all the TFTs, and makes the FPD shift to a charge accumulation operation. Thereafter, the control circuit turns on a processing power source to start supplying the electric power to the signal processing circuit.

X-ray imaging apparatus and method of operating the same

An apparatus including a scintillator panel which absorbs X-rays radiated from an X-ray generator and converts the X-rays into visible light; an image detector including a plurality of pixels arranged in a matrix array and charging the plurality of pixels with electric charges proportional to intensity of the visible light converted by the scintillator panel; a gate driver which selects a line in the image detector and applies a drive signal to pixels in the selected line; an automatic exposure request signal generator which generates an automatic exposure request signal as a trigger signal informing of X-ray radiation through detection of X-rays radiated from the X-ray generator; and a controller which controls a time point of performing an exposure operation depending on a state of the drive signal applied to the pixels of the selected line in response to the automatic exposure request signal is disclosed.

X-ray detector

公开了一种X射线检测器。在一个示例中X射线检测器装置包括开关部分和连接至开关部分的光电检测部分。光电检测部分包括底电极、设置在底电极上方的半导体区域、以及设置在半导体区域上方的顶电极。顶电极的面积小于半导体区域的顶表面的面积。

Image pick-up apparatus and image pick-up system

An image pick-up apparatus comprising an area sensor in which detecting elements are two-dimensionally arranged on a substrate, and a reference supply circuit, for supplying a reference voltage to the detecting elements, which comprises a regulator for regulating the reference voltage. A low-pass filter is arranged between the regulator and the detecting elements. The reference voltage is supplied through the low-pass filter from the reference supply circuit.

Control method for a photosensitive device

The invention relates to a control method for a photosensitive device (1, 1') comprising a matrix (2, 20) of photosensitive dots (P1 to P9) distributed on the intersections of the lines (SY1 to SY3) and columns (X1 to X3) of the matrix (2, 20). Said invention relates, in particular (but not exclusively) to the control for such devices used for detecting radiological images. The inventive method consists in exposing the matrix (2, 20) to an image cycle comprising an initialisation phase preceded by a photographic phase. The matrix (2, 20) lines are divided into several groups and the method consists, during the initialisation phase, in simultaneously resetting to zero all lines of the same group and in successively resetting to zero each group of lines.