674 results about "Radiation imaging" patented technology

A radiation imaging system comprises a radiation detector having a plurality of pixels for detecting radiation arrayed in a matrix, a plurality of detecting pixels arranged in a region in which the plurality of pixels are arrayed in the matrix and configured to output a signal corresponding to an amount of irradiation with the radiation; and a processing unit. The processing unit receives weighting information associated with a region of interest in an imaging range and generates determination information for controlling irradiation with the radiation by applying the weighting information to the corresponding signal.

A radiation imaging apparatus includes an attenuation member on the back surface side opposite the radiation incident surface of a radiation detection unit. The attenuation member is configured to reduce unexpected appearance of a part disposed on the back surface side of the radiation imaging apparatus, the unexpected appearance of which occurs due to backscattered radiation reflected by the structured part on the back surface side of the radiation imaging apparatus. The attenuation member includes a material having a radiation transmittance higher than that of the part and covers the end portion of the outline of the part that overlaps the radiation detection unit in orthogonal projection onto the surface opposite the incident surface of the radiation detection unit, and the area of the attenuation member is smaller than that of the radiation detection unit.

A radiation imaging apparatus includes a pixel array including, in an imaging region where a plurality of pixels is arranged in a matrix, a detection pixel group in which a plurality of detection pixels is arranged in a row direction, and a control unit configured to control imaging. A grid having a stripe structure in which a radiation transmissive layer and a radiation absorption layer that are strip-shaped and extend in a first direction are alternately arranged in a second direction is disposed and can be used in the radiation imaging apparatus. The radiation imaging apparatus further includes a determination unit configured to determine whether a mode in which the imaging using signals from the detection pixel group is controlled is executable by the control unit, based on information about an angle between the row direction and the first direction.

A radiation imaging system includes a radiation imaging apparatus and an imaging control apparatus, the radiation imaging apparatus includes a dose detection pixel that detects a dose of radiation irradiated from a radiation source, and the imaging control apparatus controls the radiation imaging apparatus. Before radiation imaging, the imaging control apparatus specifies a position of the dose detection pixel in a region of interest for calculating a dose indicator value of a radiation image, determines a threshold according to the position of the dose detection pixel, and transmits the position of the dose detection pixel and the threshold to the radiation imaging apparatus. The radiation imaging apparatus makes a setting of the position of the dose detection pixel in the region of interest and the threshold transmitted from the imaging control apparatus, and performs imaging based on the setting.

A radiation imaging system comprising a radiation imaging apparatus configured to detect radiation emitted from a radiation source, and a radiation control apparatus configured to control the radiation source is provided. The radiation imaging apparatus is configured to output dose information, which includes a dose of radiation entering the radiation imaging apparatus and a time at which the dose was detected, to the radiation control apparatus a plurality of times. The radiation control apparatus is configured to set the threshold dose based on a difference between a time included in the dose information from the radiation imaging apparatus and a time at which the radiation control apparatus received the dose information, and control the radiation source to stop radiation irradiation based on the threshold dose.

A radiation imaging system comprises a sensor unit of a radiation imaging device, detecting an incident radiation R irradiated from a radiation generator; an arithmetic unit calculating an accumulated dose of the radiation detected by the sensor unit; and an imaging control unit outputting an irradiation stop signal for stopping the irradiation of the radiation R to the radiation generator when the accumulated dose reaches a threshold or more, wherein the imaging control unit sets the threshold based on a dose rate of the radiation R determined based on a relationship between the accumulated dose and a time, and a delay time from a time of outputting the irradiation stop signal to a time of stopping the irradiation of the radiation of the radiation generator.

The invention provides a calibration piece. The calibration piece comprises a base body; at least one calibration block, and each calibration block is detachably connected with the base body; wherein the shape and / or the size of at least one of the base body and the calibration block are / is predetermined according to a scanning object of the radiation imaging equipment to be calibrated, so that the calibration piece and the scanning object have basically consistent shapes, and the size of the calibration piece and the size of the scanning object have a predetermined proportional relation. The invention further provides a calibration system and a calibration method.

A radiation imaging apparatus that is able to perform radiography using a grid in which a radiation transmissive layer and a radiation absorption layer each having a strip shape and extending in a first direction are alternately arranged in a second direction, the radiation imaging apparatus includes a pixel unit including a plurality of imaging pixels and a plurality of detection pixels, wherein the plurality of detection pixels includes a first detection pixel and a second detection pixel that are in a pair in the second direction, an output signal value of the first detection pixel is larger than an average value of output signal values of the plurality of imaging pixels and the plurality of detection pixels, and an output signal value of the second detection pixel is smaller than the average value.

The present invention provides a radiation detector, a radiation imaging device, and a manufacturing method. The radiation detector comprises: a substrate, a plurality of pixels for accumulating charges generated from light converted from radiation are formed in a pixel region on a surface of a substrate having a particle layer on the opposite side of a surface having the particle layer, the substrate being flexible and made of resin, the particle layer comprising inorganic particles having an average particle diameter of 0.05 μm or more and 2.5 μm or less; a conversion layer provided on a surface of the substrate on which the pixel region is provided, converting the radiation into light; and an enhancement substrate provided on at least one of a surface on the substrate side and a surface on the conversion layer side of a laminated body on which the substrate and the conversion layer are stacked.

The invention belongs to the technical field of organic radiation luminescence and radiation imaging, and discloses an aggregation-induced delayed fluorescence (AIDF) type organic scintillator material and a preparation method thereof, and a preparation method and application of a flexible organic scintillation film. The molecular structure of the material comprises carbonyl, methylene, sulfuryl and other connecting units, phthalonitrile is used as an acceptor unit, carbazole is used as a donor unit, an aggregation-induced excitation state is formed through space charge transfer among molecules, efficient AIDF luminescence and large Stokes shift characteristics are realized, the self-absorption phenomenon is effectively avoided, and the luminescent efficiency is improved. The X-ray fluorescence probe is suitable for a luminescence process under an X-ray excitation condition, the sensitivity of X-ray detection is remarkably improved, and the lowest detection limit can reach 276nGy.s <-1 > and is far superior to the 5.5 mu Gy.s <-1 > standard required by medical diagnosis. Besides, the flexible scintillator film prepared based on the material system radiates and emits light within the waveband range of 450-750 nm and is perfectly matched with the response area of a silicon-based detector, X-ray imaging with the high signal-to-noise ratio is achieved, and the imaging resolution is as high as 20.01 lp.mm <-1 >.

A radiation imaging apparatus includes the following, a radiation detector that detects radiation; an electronic circuit; a plurality of electric wiring that connects the electronic circuit; a supporter that supports the radiation detector; and a case that includes a front surface portion in which radiation is incident and a rear surface portion facing the front surface portion with the radiation detector in between. The case stores the radiation detector, the electronic circuit, the plurality of electric wiring and the supporter. The plurality of electric wiring is positioned between the supporter and the rear surface portion, and at different positions in a thickness direction of the radiation imaging apparatus. The plurality of electric wiring include GND wiring that is used for a power supply. The GND wiring is positioned in a position farther from the radiation detector than other wiring in the thickness direction.

A radiation imaging apparatus comprising an imaging region configured to acquire a radiation image, a controller configured to set a detection region as a region to be used to detect the radiation in the imaging region and a rotation detector is provided. The rotation detector detects a rotation angle of a reference portion of the imaging region with respect to a reference direction of the subject, and the controller decides, in accordance with a part to be imaged of the subject and the rotation angle, a side located in the same direction as the reference direction of the subject among sides defining an outer edge of the imaging region, sets the detection region at a position away from the side by a predetermined distance for imaging of the part, and controls imaging based on a dose entering the detection region.

To provide a radiation imaging device with improved functionality for both posture detection and impact detection.SOLUTION: A radiation imaging device includes: a first measurement unit that measures motion information of the radiation imaging device; and a second measurement unit that has a dynamic range smaller than the dynamic range of the first measurement unit and measures motion information of the radiation imaging device. Impact applied to the radiation imaging device is determined by using the first measurement unit, and information indicating the posture of the radiation imaging device is calculated by using the second measurement unit.SELECTED DRAWING: Figure 1

An information processing device including a processor, wherein the processor is configured to: acquire an optical image obtained by optically imaging a subject; specify a position of a region of interest based on the optical image; and perform control of displaying a first marker indicating a center position of an irradiation field of radiation and a second marker indicating a position determined in advance for the specified region of interest, in a case in which the subject is radiographically imaged from a direction that is substantially the same as an imaging direction of the optical imaging, on a display in a form of being superimposed on the optical image.

An image processing apparatus comprising a region extraction unit configured to perform region extraction processing of extracting a region from an input image acquired based on a radiographed image, wherein the region extraction unit comprises: a reduction unit configured to perform reduction processing for the input image to generate a reduced image; an inference unit configured to perform inference processing of, using the reduced image as an input, outputting an inferred image obtained by inferring the region in the reduced image; an enlargement unit configured to perform enlargement processing for the inferred image to generate an enlarged image; and a post-processing unit configured to perform post-processing of extracting the region from the enlarged image based on a feature of a shape of the region.

The invention provides a radiation imaging apparatus. The apparatus comprises: a radiation source configured to emit a radiation beam; a detector configured to receive a radiation beam from the radiation source, the radiation source and the detector defining an inspection channel; and at least one grating disposed on the inspection channel between the radiation source and the detector. The at least one grating is in the form of a cambered surface, or in the form of a groove-shaped surface having a plurality of angled planar segments, the cambered surface or groove-shaped surface facing the radiation source.

The invention belongs to the technical field of narrow-band optical radiation imaging, and particularly relates to a narrow-band EUV and BEUV radiation imaging device based on a nano polycrystalline hexagonal boron nitride scintillator. The imaging device is composed of a nano polycrystalline hexagonal boron nitride scintillator plated with Zr, Mo or Nb metal, a high-precision camera, a vacuum interface flange and a shielding shell, and narrow-band selective imaging can be achieved in the wave band of 6-14 nm. The radiation imaging device has high sensitivity, narrow-band selectivity and excellent radiation resistance to 13.5 nm EUV light and 6.7 nm BEUV light, and compared with a traditional YAG-based imaging device, the radiation imaging device has remarkable advantages. The invention provides an innovative solution for high-performance EUV and BEUV radiation imaging, and has important application value in the field of EUV and BEUV beam diagnosis.

A back illuminated sensor is included as a collector component of a detector for use in intraoral and extraoral 2D and 3D dental radiography, digital tomosynthesis, photon-counting computed tomography, positron emission tomography (PET), and single-photon emission computed tomography (SPECT). The disclosed imaging method includes one or more intraoral or extraoral emitters for emitting a low-dose gamma ray or x-ray beam through an examination area; and one or more intraoral or extraoral detectors for receiving the beam, each detector including a back illuminated sensor. Within the detector, the beam is converted into light and then focused and collected at a photocathode layer without passing through the wiring layer of the back illuminated sensor.

The invention provides radiation imaging equipment, CT imaging equipment, a radiation imaging method and a CT imaging method. A radiation imaging device includes a radiation source, a detector, and at least one grating disposed between an inspection channel defined by the radiation source and the detector between the radiation source and the detector. And the grating only shields one part of the radiation beam, so that one part of the radiation beam passes through the grating and then is received by the detector.

The invention belongs to the technical field of contraband detection, and particularly relates to an intelligent contraband image detection method based on a double-projection radiation imaging system. According to the scheme, a double-projection image pair containing the contraband is generated through a projection simulation algorithm, then a training data set is constructed, training of a side view image data set and a look-up image data set is achieved through the algorithm, and a contraband detection model of the side view image and the look-up image is obtained; in the side view process, different weights are distributed to the detection results of the side view image and the upward view image according to the distribution characteristics of different types of contrabands in the double-projection image, and the three-dimensional space distribution and existence probability of the contrabands in the vehicle are estimated in combination with the position distribution and size information, so that the detection process is integrally optimized, and the detection efficiency is improved. The detection speed and precision are effectively improved, and the detection rate and the recognition rate are improved.

The invention discloses a portable X-ray back scattering security check system based on AI image enhancement. The system belongs to the technical field of radiation imaging, and comprises a sensing unit used for sensing physical situation information in an imaging process so as to generate time-sequenced physical prior data; the prediction unit is used for predicting a future scanning behavior based on the physical prior data to generate a feed-forward control instruction and prediction confidence; the regulation and control unit is used for adaptively regulating and controlling scanning parameters based on the feedforward control instruction and recording execution information including regulation and control residual errors; and the AI reconstruction processor is used for performing enhanced reconstruction on the original X-ray image based on the physical priori data, the prediction confidence and the execution information. By constructing an intelligent closed loop of perception, prediction, regulation and control and reconstruction, physical uncertainty information in the imaging process is quantized and used for guiding AI reconstruction, so that the problem of information fault between physical acquisition and digital reconstruction is solved, and the quality and reliability of a final image are improved.

The invention relates to the technical field of radiation imaging, in particular to a coded hole XRD (X-Ray Diffraction) imaging system and method based on a distributed ray source, and the system comprises the distributed ray source which is provided with a plurality of focuses and is used for transmitting multiple beams of multi-energy X-rays; the front collimator is used for shaping each multi-energy X-ray beam into a fan-beam multi-energy X-ray beam and ensuring that the fan-beam multi-energy X-ray beam completely covers an area to be reconstructed of a scanned object so as to generate a diffraction signal; the transmission detector is used for performing attenuation correction on the diffraction signal; the coding plate is used for coding diffraction signals generated by the object; the pixelated spectrometer is used for measuring the coded diffraction signals so as to form diffraction data; and the image reconstruction module is used for carrying out iterative optimization on the target function by utilizing the diffraction data to obtain a reconstructed image. Therefore, the problems that an existing snapshot type coding hole imaging system is poor in data condition and difficult to solve, and an existing rotary scanning coding hole imaging system is high in complexity, long in scanning time and the like are solved.

A method of operating a radiation imaging apparatus including a sensor substrate which includes a plurality of pixels arranged in a matrix, each pixel including a conversion element configured to convert radiation or light into an electric charge and accumulate the electric charge and a switch element. The method includes, supplying a first driving potential to set the switch element in a non-conductive state, changing a bias potential supplied to a second terminal of the conversion element to remain a charge in the conversion element, supplying a second driving potential to the switch element to readout a remaining charge, and calculating a threshold voltage of the switch element based on the remaining charge.

The invention provides a radiation detection panel, a preparation method thereof and a radiation detector, and relates to the technical field of high-energy ray detection. The radiation detection panel comprises a detection substrate and a scintillator layer located on one side of the detection substrate. The scintillator layer is provided with scintillator units arranged in an array; the scintillator unit comprises at least two layers of stacked scintillator subunits; in any two adjacent layers of scintillator subunits, the conversion rate of the scintillator subunit close to one side of the detection substrate to the radiation is greater than the conversion rate of the scintillator subunit far away from one side of the detection substrate to the radiation; and the tolerance of the scintillator subunits close to one side of the detection substrate to the radiation rays is smaller than the tolerance of the scintillator subunits far away from one side of the detection substrate to the radiation rays. According to the radiation detection panel provided by the invention, a low-dose radiation source can be adopted, and high-resolution radiation imaging can be obtained.

A radiation imaging apparatus including a sensor panel including a first surface provided with a pixel array and an electrical connector and a second surface, and a base configured to support the second surface through first and second members, is provided. In an orthogonal projection to the first surface, the electrical connector is provided between a region provided with the first member provided to overlap the pixel array and an outer edge of the panel and the second member is provided to overlap the electrical connector. The second member is fixed to at least one of the second surface, the base, and the first member, and a passage extending from the first member to the outer edge is provided between the second surface and the base not to overlap the second member in an orthogonal projection to the first surface.

The present disclosure relates to a field of detection apparatus technology, and in particular, to an attitude adjustment structure, a conveying device, and a radiation imaging system. An attitude adjustment structure includes: a base body, arranged in an X direction, the base body having a bearing surface, and the bearing surface being configured to place a detected object; a first adjustment assembly, arranged on the base body and configured to drive the detected object to deviate around a Y direction on the bearing surface and drive the detected object to move in the X direction; and at least one second adjustment assembly, arranged on the base body and configured to drive the detected object to rotate around a Z direction.

The present disclosure relates to the technical field of radiation imaging. Provided are an image processing method and apparatus, and a transmission scanning system. The image processing method comprises: performing sampling processing on a transmission image, so as to obtain an image to be processed, wherein the transmission image is obtained by using a multi-column detector to detect the transmission intensity of an object during transmission scanning; determining a region to be identified in said image; using a candidate depth to perform reconstruction processing on said region, so as to obtain a reconstruction result for said region; determining the edge sharpness of the reconstruction result; and when the edge sharpness is greater than a sharpness threshold value, using the candidate depth as the depth of said region.

The invention relates to the technical field of radiation imaging, and discloses a rapid radiation imaging system and method integrating optical imaging and coding hole technology, and the system comprises a spectral imaging subsystem and a gamma ray imaging subsystem. Wherein the spectral imaging subsystem and the gamma-ray imaging subsystem share a coding pore plate, the gamma-ray imaging subsystem further comprises a radiation detector, and the spectral imaging subsystem further comprises a first lens, a second lens, a dispersion prism, a third lens and a CCD detector; the first lens, the coding pore plate, the second lens, the dispersion prism and the third lens are sequentially arranged in the direction from a target to be detected to the radiation detector and the CCD detector. According to the invention, spectral imaging and radiation imaging can be carried out simultaneously, the complexity and cost of the system are reduced, and the working efficiency and safety are improved.

To enable predicting a life of a radiation imaging apparatus on the basis of acquired image information.SOLUTION: A radiation imaging apparatus comprises: acquisition means that acquires an image from imaging means which has a plurality of pixels detecting a radiation; estimation means that estimates a deterioration degree of the radiation imaging apparatus on the basis of the image acquired by the acquisition means; and prediction means that predicts a life of the radiation imaging apparatus on the basis of transition prediction of the deterioration degree of the radiation imaging apparatus obtained by the estimation means.SELECTED DRAWING: Figure 3

The invention provides a radiation imaging apparatus. The apparatus includes a radiation source, N rows of detectors, and at least one grating disposed between an inspection channel defined by the radiation source and the detectors between the radiation source and the detectors. Each row of detectors in the N rows of detectors extends along the transverse direction of the inspection channel, and the N rows of detectors are arranged along the inspection channel. The gratings extend in a plane substantially parallel to the arrangement of the N rows of detectors, and the at least one grating has a periodic structure configured to diffract rays passing through the grating to form an interference pattern, and a non-zero angle is formed between the extension direction of the structural units of the periodic structure and the extension direction of the inspection channel.