401 results about "Radiation imaging" patented technology

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.

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.

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 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 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.

To enhance reliability of breath-holding failure determination.SOLUTION: A kymographic apparatus comprises: a waveform acquisition part that acquires a lung field signal waveform regarding a lung field and a periodic signal waveform synchronous with a heartbeat from a dynamic image acquired in radiation kymography based on photographing conditions including breath-holding instructions; and a determination part that determines the occurrence of a breath-holding failure during the radiation kymography, on the basis of the result of comparison between the acquired lung field signal waveform and the acquired periodic signal waveform.SELECTED DRAWING: Figure 5

A radiation imaging apparatus includes a plurality of pixels configured to generate an electric charge corresponding to energy or the number of particles of incident radiation, a plurality of signal processing parts respectively connected to the plurality of pixels and configured to generate a digital value based on the electric charge provided by each of the pixels, and a circuit board in which a radiation detector including the plurality of pixels and the plurality of signal processing parts is disposed in a two-dimensional manner. Each of the plurality of signal processing parts includes a signal conversion part configured to convert an analog value based on the electric charge into the digital value, and a clock signal generation part configured to provide a clock signal for generating a digital value to the signal conversion part.

A radiation imaging apparatus comprising pixels, a driver controlling the pixels via driving lines, a readout circuit reading out, via column signal lines, signals from the pixels and a detector detecting irradiation information of radiation separately from a radiation image, is provided. Each of the column signal lines is connected to pixels arranged on two pixel columns. The pixels include a first pixel and a second pixel, whose sensitivities are different from each other. The first and second pixels are connected to a common column signal line and are connected to driving lines different from each other. When detecting the irradiation information, the driver drives the first and second pixels at timings different from each other, and the detection circuit detects the irradiation information based on signals output from the first and second pixels.

According to one embodiment, a radiation imaging apparatus includes a sensor panel, a control unit, and a housing that houses the sensor panel and the control unit. The control unit includes: a control substrate that controls readout of a signal from the sensor panel; a mounting member on which the control substrate is mounted; a side plate fixed to the mounting member and having a side wall portion provided with an opening portion; and a connector which is provided on the control board in order to connect the control board and the outside, and which passes through the opening part of the side wall part. The housing is provided with an opening for inserting the control unit into the housing along the second direction.

In order to support imaging of a radiographic imaging apparatus including a radiation source that emits radiation, and an optical camera (21) that is mounted on the radiation source and that captures an optical image (G1) of a subject in a direction from the radiation source, a processor (41) derives a relative angle between the radiation source and a target plane; and displays the optical image (G1) and an angle indicator representing the relative angle and a target angle on a display (25) mounted on the radiation source.

A radiation imaging apparatus includes a radiation detection sensor configured to detect radiation, an electric circuit board, a first base including a radiation shielding member located between the radiation detection sensor and the electric circuit board, the first base being configured to support the electric circuit board, a housing containing the radiation detection sensor, the electric circuit board, and the first base in an internal space of the housing, and a first fixing portion configured to fix the first base to a back surface of the housing so that the electric circuit board faces the back surface of the housing with a gap in the internal space, wherein the first fixing portion is located in an area inside an outer periphery of the radiation shielding member in a planar view along a radiation incident direction.

To provide a radiation image processing device, a method, and a program which enable the derivation of a compositional ratio in a subject with high accuracy.SOLUTION: A processor acquires two radiation images based on radiation that is transmitted through a subject including a plurality of compositions and has different energy distributions from each other, derives body thicknesses of the subject as a first body thickness and a second body thickness, respectively, for each pixel for each of the two radiation images by using an attenuation coefficient according to an order in which the radiation is transmitted through the plurality of compositions, and derives a compositional ratio of the subject for each pixel of the radiation image based on the first body thickness and the second body thickness.SELECTED DRAWING: Figure 3

The invention provides a material sorting system, and relates to the field of task scheduling, the field of image processing, the field of radiation imaging, the field of material sorting or other technical fields. The system comprises: a material sorting device configured to sort a target material to a target position; the edge equipment is in communication connection with the material sorting equipment, and is configured to determine a current sorting stage and a calculation task of the target material according to sorting data in response to the sorting data for the target material obtained from the material sorting equipment; according to the task attribute of the calculation task, the calculation task is allocated to at least one of the edge device and the cloud server for execution; and the cloud server is in communication connection with the edge equipment and is configured to execute the calculation task under the condition that the calculation task distributed by the edge equipment is received, and return a calculation result to the edge equipment, so that the edge equipment indicates the material sorting equipment to process the target material.

The invention relates to the technical field of radiation imaging, in particular to a two-step anisotropic Gaussian spattering method and device.The method comprises the steps that Gaussian kernel representation of a target scanning object is obtained through projection data initialization, and Gaussian kernel parameters are preliminarily optimized with a reconstruction result of a traditional reconstruction method as a supervision signal; a projection image represented by a Gaussian kernel is obtained through micro-rasterization, a scanned real projection image serves as a supervision signal, Gaussian kernel parameters are further optimized, anisotropic Gaussian regularization is introduced, the representation behavior of the Gaussian kernel is standardized, if a scanning mode does not meet a standard camera model, a virtual detection plane is introduced, and the real projection image is obtained. A mapping relation between the projection data and real projection data is constructed to meet a camera model; and finally voxelizing the Gaussian representation to obtain a computed tomography reconstruction result. According to the method, the volume reconstruction effect under the condition of CL scanning mode ill-conditioned data can be effectively improved, interlayer artifacts and noise of the reconstructed image are inhibited, and the practicability is extremely high.

The invention provides a portable low-cost millimeter wave radiation imaging system and system. The system comprises a millimeter wave radiometer, an IMU module, a range finder, an optical camera, an acquisition module, a wireless transceiver module, a power supply module, an equipment appearance tool, client equipment and a detachable portable support rod. The millimeter wave radiometer is used for acquiring a millimeter wave radiation brightness temperature value of an observation scene, the IMU module is used for acquiring azimuth angle and pitch angle information of the meter wave radiometer, the range finder is used for acquiring the distance to the observation scene or a target, and the optical camera is used for acquiring an optical image of the observation scene; synchronously acquiring the data through an acquisition module; the collected data is transmitted to client equipment through the wireless receiving and transmitting module; performing two-dimensional uniform interpolation on the non-uniform azimuth angle and pitch angle on the client device; performing corresponding interpolation processing on the millimeter wave radiation brightness temperature value to generate a homogenized millimeter wave radiation image; and performing registration and fusion display on the millimeter wave radiation image and the optical image.

Optical element for a radiation imaging device, comprising: a scintillator which receives radiation (100) to emit fluorescence light with a longer wavelength than the radiation (100) and which is uniformly formed on a radiation-incident substrate surface of a lens-shaped substrate (14) provided in an objective lens (10), wherein the scintillator is made of: a base material which is a solid optical material from which the lens-shaped substrate (14) is formed, and of a predetermined additive.

To perform angle adjustment between a bulb and a radiation imaging device when a radioactive ray is emitted in a horizontal direction appropriately while suppressing costs.SOLUTION: A system 100 includes a bulb (radioactive ray irradiation unit) 23 for emitting a radioactive ray R. The system 100 includes the bulb 23 and a distance measuring unit (measuring unit) 29 for measuring a distance from an imaging device 1 for generating an image based on the radioactive ray R emitted from the bulb 23 and outputting distance information. The system 100 calculates angle information on the imaging device 1 for an irradiation direction of the radioactive ray R by the bulb 23 on the basis of the distance information measured by the distance measuring unit (measuring unit) 29.SELECTED DRAWING: Figure 5

The present disclosure relates to the field of radiation imaging for testing and / or quality assurance of items (6) in a variety of industrial applications. The radiation imaging system (1) for inspecting a plurality of items (6) comprises a radiation imaging device. a shielded enclosure (31), at least one access port (33). and at least one item handling apparatus (10) with a movable manipulator (4) configured for detachably coupling and releasing a plurality of mounts (5) suspended on a retaining element (36) arranged in the access port (33). and positioning the plurality items (6) mounted on the mounts (5) within a projection space (23) of the radiation imaging device.

A radiation imaging apparatus includes an image obtaining unit configured to obtain image data corresponding to incident radiation, and an image processing unit configured to perform a first bone density measurement based on image data obtained by the image obtaining unit with a first exposure field, and perform a second bone density measurement based on image data obtained by the image obtaining unit with a second exposure field narrower than the first exposure field.

To synchronize the temporal phases of the state of a subject between dynamic information, such as dynamic image data obtained by dynamic imaging using radiation, and ultrasonic information, such as ultrasonic image data obtained by ultrasonic imaging.SOLUTION: An information processing apparatus comprises a control unit. The control unit synchronizes and displays dynamic information and ultrasonic information such that the temporal phases of the state of the subject coincide. The dynamic information is a dynamic image 641, which is dynamic image data indicating a change in the subject obtained by dynamic imaging using radiation. The ultrasonic information is an ultrasonic image 642, which is ultrasonic image data of a moving image indicating a morphological change of the subject obtained by ultrasonic imaging of the moving image.SELECTED DRAWING: Figure 11

The invention relates to the technical field of radiation imaging, and discloses a high-speed chopper wheel scanning imaging method, which comprises core structure configuration and imaging operation steps, and specifically comprises the following steps: core structure configuration: (a) preparing an annular chopper wheel by adopting a lead material with the density equal to or higher than that of a steel plate, four equidistant beam outlets are uniformly distributed in the peripheral direction of the chopper wheel, penetrate through the inner side and the outer side of the chopper wheel and are used for collimating X-rays; (b) an X light source is fixedly arranged in the annular central area of the chopper wheel, and a transmitting end faces a beam outlet; and (c) a detector is fixedly arranged outside the chopping wheel, and the receiving surface of the detector corresponds to the emergent direction of the beam outlet and is used for receiving X-ray energy reflected by the scanned object. According to the high-speed chopper wheel scanning imaging method, by optimizing the chopper wheel structure design and the imaging process, synchronous improvement of energy collection efficiency, imaging precision and scanning speed is achieved, the imaging algorithm is simplified, and the core pain point in the prior art is solved.

The invention provides a detector, a detector assembly, a radiation imaging system and a radiation imaging method. The detector comprises a semiconductor layer which is used for receiving incident photons and generating electron hole pairs; the electrode assemblies are arranged on the two sides of the semiconductor layer and used for applying bias voltage to form an electric field in the semiconductor layer so as to collect electric signals formed by the electron-hole pairs; the rear-end signal processing circuit comprises a signal shunting module, a counting branch and an integrating branch, and the signal shunting module is used for dividing the electric signal into two paths; the counting branch comprises a threshold comparator and a counter, the threshold comparator is used for comparing the amplitude of the input electric signals with a preset energy threshold, and the counter is used for counting the electric signals exceeding the preset energy threshold; and the integration branch comprises an integrator, and the integrator is used for accumulating the input electric signals.

A radiographic imaging apparatus includes a plurality of pixels configured to convert radiation to electrical signals and a control section configured to determine an image capturing condition based on the electrical signals converted by the pixels and to start image capturing.

To provide a radiation imaging device that is easy to assemble even when a heat insulating member is arranged near a cable.SOLUTION: The radiation imaging device (100) has a sensor panel (101), a cable (180), a substrate (190), a first heat insulating member (160), a second heat insulating member (161), and a housing (150), where the first heat insulating member (160) is provided between the sensor panel (101) and the substrate (190), and the second heat insulating member (161) is provided between the cable (180) and a side wall (150c), and the internal space of the housing (150) has a space on the incident surface side and a space on the back surface side, with the position where the first heat insulating member (160) and the second heat insulating member (161) sandwich the cable (180) between them.SELECTED DRAWING: Figure 1

The present disclosure provides a fusion system and method for radiation imaging and radioactive material monitoring of a baggage or package item. The fusion system includes a radiation imaging subsystem configured to operate in a pulsed mode to radiation image the baggage or package item, a radioactive material monitoring subsystem configured to operate in a pulsed mode to monitor whether the baggage or package item contains radioactive material, and a synchronization control subsystem in communication with both the radiation imaging subsystem and the radioactive material monitoring subsystem and configured to control the radiation imaging subsystem and the radioactive material monitoring subsystem to operate alternately.

This invention provides a proton imaging method and imaging device, applicable to the fields of proton imaging technology and signal processing technology, particularly in the field of particle radiation imaging technology. The method includes: determining a virtual source position based on an initial two-dimensional dose distribution of a proton beam acquired without an imaging object; obtaining multiple sub-beam propagation paths from the virtual source position to the multiple predetermined sub-beam center positions based on the virtual source position and multiple predetermined sub-beam center positions on a predetermined plane; obtaining sub-beam data pairs corresponding to the sub-beam propagation paths and the two-dimensional dose distribution based on the two-dimensional dose distribution and the lateral distribution components determined along the sub-beam propagation paths; obtaining multiple water equivalent path lengths corresponding to at least one projection angle through an iterative algorithm based on the multiple sub-beam data pairs corresponding to at least one projection angle; and performing image reconstruction based on the multiple water equivalent path lengths corresponding to at least one projection angle to obtain a target image of the imaging object.

The present disclosure provides a calibration piece, comprising: a base body; at least one calibration block, wherein each calibration block is detachably connected with the base body; wherein the shape and / or size of at least one of the base body and the calibration block is determined in advance according to a scanning object of a radiation imaging device to be calibrated, so that the calibration piece has a substantially consistent shape with the scanning object, and the size of the calibration piece has a predetermined proportional relationship with the size of the scanning object. The present disclosure also provides a calibration system and a calibration method.

The invention relates to an optical imaging device with soft X-ray radiation imaging capability and a preparation method thereof. The optical imaging device comprises an optical lens, a scintillation film layer and an imaging sensor, wherein the scintillation film layer is plated on the outer side of the incident surface of the optical lens and is used for converting incident soft X-rays into visible light in situ; the scintillation thin film layer comprises a doped yttrium aluminum garnet material; the optical lens is used for amplifying or reducing the visible light converted by the scintillation thin film layer for imaging; and the imaging sensor is used for receiving the visible light imaged by the optical lens so as to obtain a spatial distribution image of the soft X-ray. The invention has the beneficial effects that the scintillation film is directly plated at the foremost end of the lens, so that soft X-ray in-situ conversion is realized, optical signal spatial diffusion caused by an independent scintillation screen is thoroughly avoided, the imaging resolution is remarkably improved, the optical path is shortened, and the signal loss is reduced.