100 results about "Flat panel detector" patented technology

The invention relates to the technical field of cone-beam computed tomography, and discloses a scattering correction method and system for cone-beam computed tomography. The method comprises the following steps: acquiring original projection data and main scattering data acquired by a first flat panel detector; wherein the first flat panel detector is arranged in the emission direction of the radiation source; acquiring secondary scattering data acquired by a second flat panel detector; wherein the second flat panel detector is arranged in the scattering direction of the radiation source; determining target projection data based on the original projection data, the main scattering data and the auxiliary scattering data; the target projection data is used for cone beam computed tomography imaging. According to the method, scattering correction can be completed on the premise of not depending on special hardware, not additionally increasing radiation dose and not losing imaging view, and the imaging precision can be effectively improved.

The invention provides an X-ray flat panel detector and a preparation method of the X-ray flat panel detector. The X-ray flat panel detector comprises a substrate, a readout circuit layer located on the substrate, an insulating grid layer located on the side, away from the substrate, of the readout circuit layer, a first charge transmission layer located on the side, away from the substrate, of the readout circuit layer, and a perovskite material layer located on the side, away from the substrate, of the first charge transmission layer. The second charge transfer layer is located on one side, away from the substrate, of the perovskite material layer; and the top electrode layer is located on one side, away from the substrate, of the second charge transfer layer. The readout circuit comprises a plurality of pixel units. The insulating grid layer comprises a plurality of meshes, and the orthographic projection of each pixel unit on the substrate is located in the orthographic projection of one mesh on the substrate. The first charge transport layer is filled in the meshes of the insulating grid layer. And the perovskite material layer is filled in the meshes of the insulating grid layer. The X-ray flat panel detector provided by the invention has relatively high image resolution, image contrast and definition.

This invention discloses an industrial material inspection method and system based on feature extraction and contrast enhancement, belonging to the field of image inspection technology. It includes: S1, acquiring the transmitted signal using a digital flat panel detector and generating an original digital image based on the differences in X-ray absorption by different materials or defects; S2, performing uniformity correction and normalization enhancement on the original digital image, and achieving preliminary differentiation of different material regions; S3, dividing the original image data into processing domains based on the preliminary differentiation results, and performing differentiated enhancement processing based on the local feature attributes of each processing domain to generate a binary feature image. By integrating X-ray penetration imaging, multi-dimensional image enhancement, and a deep learning-driven intelligent rating system, this invention fundamentally solves the key technical bottlenecks in traditional industrial material inspection, such as inconsistent image quality, lack of material identification, and strong subjectivity in rating, achieving an automated, intelligent, and objective upgrade in industrial material defect detection.

This utility model discloses a vehicle-mounted X-ray whole-body imaging device, including a main frame, a sub-frame, an X-ray tube assembly, and a rectangular flat panel detector. The flat panel detector is mounted on the sub-frame, and the X-ray tube assembly is mounted on the main frame. The side of the flat panel detector closest to the X-ray tube assembly is the receiving surface. The X-ray tube assembly is rotatable about a direction perpendicular to the receiving surface. This vehicle-mounted X-ray whole-body imaging device uses a rectangular flat panel detector, which facilitates large-scale, rapid whole-body exposure imaging by doctors. The X-ray tube assembly can be rotated as needed, facilitating doctors to position the device at different angles for imaging. Using the X-ray tube assembly horizontally shortens the distance required for normal imaging by the flat panel detector, thereby reducing the horizontal space occupied by this vehicle-mounted X-ray whole-body imaging device. Rotating the X-ray tube assembly to a vertical position reduces the risk of damage to the rotating anode due to vibration.

The invention discloses a flat panel detector and a method and device for using the flat panel detector. A flat panel detector is constructed on the basis of an amorphous silicon substrate on which a hexagonal pixel pattern is uniformly laid. The hexagonal pixels can be arranged more closely on a two-dimensional plane, and gaps among the pixels are reduced, so that a photosensitive area is maximized with a relatively high filling rate, and the spatial resolution of the detector is improved. And the hexagonal pixels enable a frequency space to generate an angle of 60 degrees, so that the influence of grid artifacts is reduced to a certain extent. Meanwhile, the hexagonal pixel array is effectively processed and optimized by adopting an image reconstruction algorithm, the signal-to-noise ratio of the single pixel of the flat panel detector is improved, and the definition and accuracy of the image are improved.

The utility model discloses a punching machine for punching a COF (chip on film) reading chip of a flat panel detector, which comprises a working table, a transferring mechanism is arranged on the working table, a punching lower die is arranged on the transferring mechanism, a blanking port of a chip is arranged on the punching lower die, and a positioning component for positioning a punching part is further arranged on the punching lower die. A chip on a stamping part is completely stamped into a discharging box through a pressing head on the stamping upper die, automatic stamping of the chip is achieved, meanwhile, the stamping efficiency is high, an operator only needs to align a positioning identification hole in the stamping part with a stamping hole, and the stamping upper die is arranged above the stamping lower die in a vertically-displaceable mode. And therefore, the automatic punching device is simple to operate.

This invention relates to a digital radiographic inspection method and apparatus for wind turbine blades, belonging to the field of wind turbine blade inspection technology. The method includes: placing and fixing the turbine blade on a blade fixture; mounting the X-ray machine on the X-ray machine fixture; defining a detection grid in the inspection area of ​​the turbine blade; tightly attaching and fixing the X-ray flat panel detector to the turbine blade; and sequentially inspecting each grid of the turbine blade according to the detection grid. This invention, through the combination of the blade fixture, the X-ray machine fixture, the X-ray machine, and the X-ray flat panel detector, constitutes a digital radiographic inspection apparatus for turbine blades. This apparatus enables the detection of defects in wind turbine blades. The inspection method of this invention is simple and rapid; the inspection images obtained by this invention can clearly and accurately identify defects in wind turbine blades, with a defect detection rate of 100%.

The invention discloses an automatic matching method for a working position of an X-ray machine and a flat panel detector, and relates to the technical field of radiographic imagines.The method comprises the steps that pet struggling features are recognized in real time through a motion state classification model, a compensation mechanism is triggered before displacement occurs, and matching delay caused by passive response in the prior art is avoided; the working position of the X-ray machine can synchronously track the position of the detector to ensure that an imaging area accurately covers a key anatomical structure; when the displacement is overtime, the system automatically stops exposure and reversely calibrates the position based on the anatomical mark point; an operator does not need to interrupt flow manual calibration, the repeated exposure risk of the pet is reduced, and the diagnosis and treatment efficiency is improved; the influence of equipment vibration and operation jitter is suppressed by gravity compensation and smooth filtering, and the displacement prediction model is compatible with motion characteristics of pets with different body types; in a narrow clinic or multi-pet assembly line scene, the matching stability is kept; an autonomous decision closed loop is formed from data acquisition, state judgment, real-time tracking to abnormal calibration.

The invention discloses an X-ray photography system and a detection bed, the detection bed comprises a base, a bearing platform and a first mounting part, the first mounting part is mounted on the base or the bearing platform, the first mounting part comprises a fixed frame and a movable frame, the movable frame can move to be hidden below the bearing platform, and the movable frame can also move to be exposed out of the outer side of the bearing platform in the front-back direction. Due to the fact that the detection bed is provided with the first installation part, the first installation part can be used for installing the flat panel detector on the outer side of the bearing platform, and accurate photographing and imaging can be conducted on a patient lying on the side; moreover, the first mounting part can move in the front-back direction relative to the bearing platform to be exposed and hidden relative to the bearing platform, so that the first mounting part can be exposed to mount the flat panel detector, and camera imaging of the patient in the lateral position is realized; when a patient is shot and imaged under other conditions, the first mounting part can be hidden below the bearing platform, so that hidden storage is realized, and the occupied space is reduced.

The invention provides a CT imaging control method and a CT imaging control system, and relates to the technical field of medical imaging. By introducing the double X-ray sources and the two flat panel detectors and combining with the 3D optical camera to obtain breathing signals of a patient, CT imaging of the patient in a free breathing state is achieved. In the scanning process, based on real-time breathing signals, the two X-ray sources are triggered in sequence at different rotation angles for exposure, and the double-angle projection data obtained by the corresponding flat panel detectors are read. And reconstructing an organ mask image sequence from the double-angle projection data by using a pre-trained deep neural network, further analyzing the sequence to quantify the amplitude and phase of respiratory movement, distributing respiratory phase values for the projection data with different rotation angles, and classifying the respiratory phase values as gating data frames. And performing image reconstruction on each gating data frame to obtain four-dimensional CT images of different breathing phases. The problem of motion artifacts of the CT image in the free breathing state is solved, so that the image quality and the diagnosis accuracy are improved.

The application discloses a kind of X-ray flat panel detector timing synchronization and correction method and system, image is acquired by flat panel detector;By timing control module, the main synchronization pulse is sent to the synchronization interface of flat panel detector on one hand, the working frequency of flat panel detector is controlled;On the other hand, the exposure window pulse returned by flat panel detector is frequency-division;After frequency-division, the secondary synchronization pulse is given to high voltage generator interface to control X-ray beam exposure;Image property is marked according to the pulse controlled by timing control module and the setting of frequency-division in the image acquired by flat panel detector in the above step 1;According to the strategy set, dark-field image multi-frame average or recursive average is carried out, and real-time offset correction data is generated.The offset correction data of the application is updated in real time, and does not need to be generated in advance, which greatly simplifies the generation mode of other correction files, solves the contradiction between the real-time application and the image quality of the equipment, and also provides a solution for variable frequency acquisition.

The invention discloses an X-ray imaging device and an X-ray receiving device, the X-ray receiving device comprises a support device and a film box assembly, and the support device is configured to be a vertical support device. The film box assembly is connected to the support device, and a flat panel detector is arranged in the film box assembly and used for receiving X-rays and generating electric signals. The wafer box assembly can move along a first movement path, the first movement path of the wafer box assembly has a displacement component in the transverse movement direction, and the transverse movement direction is perpendicular to the vertical direction and parallel to the wafer box assembly. When the to-be-detected person is subjected to X-ray inspection, the film magazine assembly can move along the first movement path, so that the film magazine assembly generates a displacement component in the transverse movement direction, more image information of the to-be-detected person in the transverse movement direction can be obtained, and subsequent image splicing is facilitated to obtain a complete image of the to-be-detected person in the transverse movement direction.

The application discloses a dual-energy ray bone density evaluation method based on a flat panel detector and relates to the technical field of ray evaluation.The direct conversion mode of the flat panel detector is used to realize high-precision collection of low-energy and high-energy ray images, and noise and resolution loss caused by traditional indirect imaging are significantly reduced;one-time and two-time corrections are completed in an edge computing node, the problem of gray scale discontinuity and energy ratio distortion in the joint area of bones and soft tissues is effectively solved, and the authenticity of the image boundary is improved;further dynamic smoothing processing of the energy ratio is combined to obtain a stable ratio image, the stability and repeatability of bone density measurement are significantly enhanced, and more accurate bone density evaluation is realized.

A flat panel detector and an imaging system are provided. The flat panel detector includes a plurality of pixel units which include photosensitive pixel units and alignment pixel units. Each photosensitive pixel unit includes a photoelectric sensor configured to convert an incident light into an electrical signal so that a photosensitive pixel unit in which the photoelectric sensor is located has a grayscale that changes according to a real-time change of the incident light. Each alignment pixel unit is configured to have a fixed grayscale, and the fixed grayscale does not change according to the real-time change of the incident light. The alignment pixel units includes first alignment pixel units and second alignment pixel units. Each first alignment pixel unit has a first fixed grayscale, each second alignment pixel unit has a second fixed grayscale different from the first fixed grayscale.

The invention discloses a CBCT (cone beam computed tomography) device based on a general image sensor. The CBCT device comprises a main control computer, a bracket, a rotary suspension arm, a cone beam X-ray source and an imaging part, the imaging part is composed of a scintillator, a plane mirror and a zoom camera. The cone-beam X-ray penetrates through a measured object and irradiates the scintillator, and the scintillator converts an energy signal carried by the X-ray into a visible light signal. And after the visible light signal is reflected by the plane mirror, a light path deflects by 90 degrees, and is imaged on an image sensor of the zoom camera through the lens. The provided CBCT device uses a general image sensor which is higher in resolution, lower in noise level and lower in cost compared with an existing flat panel detector. In addition, the circuit part of the imaging part is prevented from being irradiated by X-rays, so that the service life is greatly prolonged. Besides, the view field range of the camera on the scintillator can be changed by changing the focal length, meanwhile, the spatial resolution capability of the CBCT device is changed, and the configuration flexibility of the CBCT device can be greatly improved.

This invention relates to the field of X-ray machine technology, and in particular to a flat panel detector for a portable X-ray machine. It includes a lifting mechanism mounted on a movable base; a first mounting frame with a motor drive mechanism and a second mounting frame, the second mounting frame being driven to rotate vertically via the motor drive mechanism; an emitter and a detector plate mounted on the second mounting frame; protective components mounted on both sides of the detector plate; and a trigger component mounted on the detector plate. When the detector plate is parallel to the bed board, the lifting mechanism raises and lowers the trigger component to abut against the bed board, generating compressed air to make the protective component perpendicular to the detector plate. This invention allows for selection of a suitable imaging method based on the patient's physical condition; the protective components protect patients with thoracic cavities, facilitating safe imaging; furthermore, this invention allows for air cleaning of the detector plate surface when the protective component is reset, removing impurities and improving the accuracy of the examination.

A registration fixture for use with a surgical navigation system for registration of medical images with a three-dimensional tracking space includes a base frame adapted to be mounted over a flat panel detector of an x-ray medical imaging device and a side frame having optical tracking markers and mounted to the base frame. The base frame includes a first set of radio-opaque markers embedded therein in a first predetermined pattern and arranged on a plane and a second set of radio-opaque markers embedded therein in a second predetermined pattern and likewise arranged on another plane, the second set of radio-opaque markers being spaced apart from the first set of radio-opaque markers. The side frame has a plurality of optical tracking markers and is configured to be detachably mounted to the base frame without piercing a sterile drape to be interposed between the base frame and the side frame.

The invention relates to the technical field of radiotherapy equipment, and discloses a simulated beam outlet for boron neutron capture therapy, which comprises a simulated treatment room, a high-precision slide rail type six-dimensional mechanical arm treatment bed is mounted in the simulated treatment room, and an image guide system flat panel detector is mounted in the simulated treatment room. According to the invention, the boundary dimension and the horizontal height of the simulated beam port shell are completely consistent with those of an actual beam port, so that an accurate physical reference is provided for positioning; the two image guide system flat panel detectors which form an included angle of 90 degrees can synchronously collect images of a patient from the horizontal direction and the vertical direction, and the positioning deviation is accurately analyzed; according to the positioning device, the laser lamp can be accurately positioned to the center of a simulation beam outlet through cooperation of a driving motor, a pull rope and a spring, a datum line is projected to assist in checking the positioning precision, a multi-dimensional positioning system is formed through cooperation of the driving motor, the pull rope and the spring, it is ensured that the positioning deviation of a patient is controlled within an extremely small range, and a foundation is laid for the accuracy of subsequent actual treatment.

The embodiment of the present application provides a pixel circuit, a driving method thereof and a flat panel detector. The pixel circuit comprises: a first thin film transistor, a gate of the first thin film transistor being connected with a reset voltage line, a source of the first thin film transistor being connected with a first end of a first capacitor, a first end of a second capacitor and a negative electrode of a photosensitive diode; a drain of the first thin film transistor being connected with a reference voltage line; a second end of the first capacitor being connected with a positive electrode of the photosensitive diode and a bias voltage line; a second end of the second capacitor being connected with a gate of a fourth thin film transistor and a source of a fifth thin film transistor; the source of the fourth thin film transistor being connected with the drain of the fifth thin film transistor, the drain of the fourth thin film transistor being connected with a source of a third thin film transistor; the drain of the third thin film transistor being connected with an output signal line; and a drain of a second thin film transistor being connected with the source of the fourth thin film transistor. The present application can avoid the influence of the threshold voltage of the source follower and its drift on the pixel circuit.

The invention belongs to the field of display, and particularly relates to an array substrate and a manufacturing method thereof and a flat panel detector, the array substrate comprises a substrate, a first metal layer, an interlayer insulating layer, a second metal layer, an active layer, a gate insulating layer and a third metal layer, the first metal layer comprises a drain electrode and a lower electrode which are connected, and the second metal layer comprises a drain electrode and a lower electrode which are connected. The interlayer insulating layer partially covers the first metal layer, the second metal layer is formed on the side, away from the substrate, of the interlayer insulating layer and comprises a source electrode, and the active layer is formed on the sides, away from the substrate, of the first metal layer, the interlayer insulating layer and the source electrode. The gate insulation layer is formed on the sides, away from the substrate, of the first metal layer, the second metal layer and the active layer, the third metal layer is formed on the side, away from the substrate, of the gate insulation layer, and the third metal layer comprises a gate. The source electrode and the drain electrode are arranged in the direction perpendicular to the substrate, the occupied area of the thin film transistor is reduced, the light sensing area of the photodiode is increased, and the detection sensitivity of the flat panel detector is improved.

The application provides an active pixel sensor and a flat panel detector. The active pixel sensor provided by the embodiment of the present application comprises a photosensitive device, a follower transistor, an adjusting sub-circuit and a reading transistor. The control electrode of the follower transistor is connected with the first electrode of the photosensitive device, and the first electrode is connected with a first power supply voltage terminal; wherein the first power supply voltage terminal is used for providing a first power supply voltage; the adjusting sub-circuit is configured to adjust the amplification sensitivity of the follower transistor in response to a first control signal; the control electrode of the reading transistor is connected with a scanning line, the first electrode is connected with the second electrode of the follower transistor, and the second electrode is connected with a reading line; wherein the scanning line is used for providing a scanning signal. The active pixel sensor provided by the embodiment can adjust its detection sensitivity and adapt to various types of detection.

This invention provides a non-destructive testing device and method for nut quality based on a fully automated micro-CT scanner. The method includes: S1, using a transport mechanism to transport the nuts to a rotating platform; S2, keeping the micro-focal spot X-ray source and the flat panel detector stationary, and controlling the rotating platform to rotate intermittently via a PLC controller to achieve full-angle irradiation of the nuts by the micro-focal spot X-ray source; S3, during the intermittent stops of the rotating platform, acquiring planar array images of the nuts from various angles using the flat panel detector to obtain a full-angle planar array image of the nuts, and transmitting it to a computer; S4, the computer performs tomographic reconstruction and image processing based on the full-angle planar array image to obtain the quality trait parameters of the nuts. This invention enables non-destructive testing of nut quality trait parameters through visual recognition technology, significantly improving testing accuracy and efficiency compared to manual trait testing methods and traditional culture methods for detecting mold infection.

The invention relates to a CT (Computed Tomography) driving adjustment type SPECT-CT combined imaging device. The combined imaging device comprises a mounting back plate (1), a vertical guide rail module (2), a radiation source (3), a left SPECT detector module (4), a right SPECT detector module (5) and a CT flat panel detector module (6), a main detection hole (7) positioned above the mounting back plate is formed in the mounting back plate; the mounting back plate is vertically arranged, and a vertical guide rail (21) in the vertical guide rail module (2) is vertically arranged on the front side of the mounting back plate. The vertical guide rail module (2) comprises a vertical guide rail (21), an upper sliding block set (22), a connecting strip set (23), a lower sliding block set (24) and a linear module (25). The left SPECT detector module (4) comprises a left upper horizontal guide rail (41), a left upper sliding block (42), a left detector (43), a left lower horizontal guide rail (44), a left lower sliding block (45) and a left connecting rod (46). And the right SPECT detector module (5) comprises a right upper horizontal guide rail (51), a right upper sliding block (52), a right detector (53), a right lower horizontal guide rail (54), a right lower sliding block (55) and a right connecting rod (56).

The application provides a detection substrate and a flat panel detector, and relates to the technical field of photoelectric detection. The detection substrate can improve radiation resistance and prolong service life without increasing the thickness of a scintillator layer. The detection substrate comprises a plurality of detection pixel units arranged in an array. The detection pixel unit comprises a transistor, a photoelectric conversion part and a scintillator layer. The photoelectric conversion part is located between the transistor and the scintillator layer. The photoelectric conversion part comprises a radiation-sensitive layer and a photosensitive unit arranged in a stack. The radiation-sensitive layer is configured to absorb rays and convert the rays into carriers. The photosensitive unit is configured to absorb at least visible light and convert the visible light into carriers. The application is suitable for manufacturing the detection substrate.

The utility model relates to the technical field of X-ray detection devices, in particular to a mini-type detection device. Comprising a workbench, a shell, a light pipe assembling assembly and a camera shooting assembly, a Z-axis moving assembly is arranged on the workbench, and the Z-axis moving assembly drives an objective table to move in the direction close to or away from the light pipe assembling assembly. The receiving flat plate assembly comprises a mounting bracket and a flat plate detector, and is provided with a flat plate protection fiber plate. In addition, the device further comprises a laser positioning assembly, an auxiliary light source and other components, the overall design is compact, and the overall convenience and detection precision of the device are improved.

The utility model relates to a movable X-ray image system light multi-angle flat plate stand column device which comprises a base, a fixed seat and an annular seat, the fixed seat is installed on the base, the annular seat is rotatably installed on the fixed seat, vertical frames are installed on the fixed seat, a winding box is installed between the two vertical frames, a lifting belt is installed in the winding box, and the lifting belt is installed on the annular seat. Leg grooves are symmetrically formed in the middle of the lifting belt, and a flat plate detection mechanism and an X-ray detection mechanism are symmetrically mounted on the ring seat; a second motor works, first rotating teeth and outer teeth are in meshing transmission to achieve rotation of a ring seat, then a flat plate detection mechanism and an X-ray detection mechanism rotate around a fixed seat, and during rotation, second rotating teeth rotate along the meshed outer teeth to drive a threaded rod to rotate so as to drive a sliding seat in threaded connection to ascend and descend. Lifting of the flat panel detector and the X-ray detector is achieved, and all-directional detection is conducted on a patient.

The invention provides an image correction method, device and equipment and a medium, and the method comprises the steps: obtaining a plurality of projection images of different beam-out angles for a scanned object through a target CBCT (cone beam computed tomography) system; the target CBCT system comprises a radiation source, a two-dimensional grid and a flat panel detector, and the grid period of the two-dimensional grid and the pixel size of the flat panel detector meet integral multiple constraints; aiming at each projection image, carrying out mirror image compensation and frequency domain conversion processing on the projection image to obtain a spectrogram corresponding to the compensated projection image; on the basis of integral multiple constraints, grid line filtering and inverse frequency domain conversion processing are carried out on grid line frequency components generated by the two-dimensional grid line in the amplitude frequency spectrogram, and a corrected projection image is obtained; and performing CBCT reconstruction based on the plurality of corrected projection images to generate a reconstruction image corresponding to the scanned object. Through the integer multiple constraint, the position of the grid line generated by the two-dimensional grid line in the amplitude spectrogram can be determined, and the accuracy of grid line filtering is improved.

The invention discloses a flat panel detector and an X-ray imaging system, the flat panel detector comprises a scintillator layer, a microcapsule layer and an image sensor layer, and the scintillator layer is used for converting X-rays into visible light; the microcapsule layer is arranged below the scintillator layer and is used for absorbing part of visible light; the image sensor layer is arranged below the micro-capsule body layer and is used for receiving the visible light passing through the micro-capsule body layer and converting the visible light into an induction current signal; wherein a visible light absorption layer is arranged in the micro-capsule body layer, and the micro-capsule body layer is used for adjusting the thickness of the visible light absorption layer so as to change the absorption capacity of the visible light absorption layer on the visible light. According to the flat panel detector, the thickness of the visible light absorption layer is changed by arranging the micro-capsule layer, so that the phenomenon that the image sensor is prone to overexposure when the light intensity is large is improved, and the detection accuracy of the flat panel detector is improved.