644results about "Radiation detection arrangements" patented technology

A radiographic system that includes a radiation generation apparatus configured to emit radiation, a radiographic apparatus configured to generate a radiographic image based on the radiation, a control apparatus configured to communicate with the radiographic apparatus to receive the radiographic image and control operation, the radiographic system includes an obtaining unit configured to obtain a plurality of dose index values using the radiation image generated based on the radiation.

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.

The invention relates to a wide-view C-shaped arm X-ray machine and an imaging method thereof.The wide-view C-shaped arm X-ray machine comprises a main machine, a C-shaped arm, an X-ray source, a flat panel detector, a first telescopic mechanism, a first translation mechanism and a first swing mechanism, the first telescopic mechanism is arranged at one end of the C-shaped arm and used for driving the first translation mechanism and the flat panel detector to stretch out and draw back, and the first swing mechanism is arranged at the other end of the C-shaped arm and used for driving the X-ray source to swing. The first translation mechanism is arranged on the first telescopic mechanism and used for driving the flat panel detector to translate, and the first swinging mechanism is arranged at the other end of the C-shaped arm and used for driving the X-ray source to swing so as to follow the position of the flat panel detector, so that X-rays emitted by the X-ray source can fall on the flat panel detector. The flat panel detector can move to different imaging positions to obtain images at different positions, and the images are synthesized into a larger image, so that the area of an imaging region is greatly increased, the observation view of a doctor is expanded, and the efficiency and safety of an operation are improved.

The invention relates to a multi-robot image guide radiotherapy system and an imaging method thereof, and relates to the technical field of radiotherapy. The multi-robot image guide radiotherapy system comprises a treatment device, a main robot, an auxiliary robot and an imaging device. One or both of the radiation blocker and the imaging detector are movable such that, upon emission of the imaging beam, the imaging detector can face the X-ray source and the radiation blocker faces away from the X-ray source, then the radiation blocker does not interfere with detection by the imaging detector; and when the treatment beam is emitted, the radiation blocker can face the treatment device, and the imaging detector deviates from the treatment device, so that the treatment beam cannot directly irradiate the imaging detector, and the purpose of protecting the imaging detector to ensure the quality of an image detected by the imaging detector is achieved.

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 relates to the technical field of medical instruments, in particular to a medical image acquisition device which comprises a stand column, a driving motor, a shaft sleeve, a flat panel detector, an adjusting mechanism, a supporting plate, a fixing assembly and an ejector rod. A driving motor is fixedly installed on the stand column. A shaft sleeve is slidably installed on the driving motor. The shaft sleeve and the flat panel detector are rotationally mounted; an adjusting mechanism is arranged above the shaft sleeve, and when the flat panel detector performs image acquisition, the adjusting mechanism drives the flat panel detector to deflect; the shaft sleeve is fixedly provided with a supporting plate, the supporting plate is provided with a driving cavity, the driving cavity is internally provided with a fixing assembly, the ejector rod is located in the driving cavity, and when the flat panel detector deflects, the adjusting mechanism drives the ejector rod to horizontally slide through the fixing assembly. Therefore, the diversity of image data acquisition is improved, and the acquisition accuracy is improved.

A general workflow for deep learning based image restoration in X-ray and fluoroscopy / fluorography is disclosed. Higher quality images and lower quality images are generated as training data. This training data can further be categorized by anatomical structure. This training data can be used to train a learned model, such as a neural network or deep-learning neural network. Once trained, the learned model can be used for real-time inferencing. The inferencing can be more further improved by employing a variety of techniques, including pruning the learned model, reducing the precision of the learned mode, utilizing multiple image restoration processors, or dividing a full size image into snippets.

The invention relates to the technical field of medical imaging, and discloses an image acquisition method and device for C-arm X-ray equipment and the C-arm X-ray equipment, and the image acquisition method comprises the steps: determining a target direction in which a scanning view needs to be enlarged under a target rack position according to a to-be-scanned area; based on the target direction, the contour of the to-be-scanned area and the scanning view field of the rack, determining a target motion track of the rack; wherein under the target movement track, the scanning view field of the rack covers the to-be-scanned area; and performing exposure acquisition according to the target movement track to obtain acquisition data. The exposure acquisition is carried out according to the target motion trail, so that the scanning visual field range can be enlarged, acquisition data of a larger scanning area can be obtained in the image acquisition process, a more accurate three-dimensional reconstruction result can be provided, the reconstructed image is more real and detailed, and the complete scanning image of the organ part can be obtained.

The invention provides a motion control signal generation method, a target image acquisition method, a target image processing method and an imaging system. The motion control signal of the imaging device is generated by acquiring the current pose of the imaging device, the current pose of the target and the stored third pose information and fourth pose information, so that the imaging device is automatically adjusted to the target pose position, and accurate overlapping of the imaging space and the target is ensured. Through the data processing process, the control device can calculate the ideal position and angle of the imaging device in real time and adjust the imaging device to the best imaging state stored in advance. Compared with a traditional manual pose adjusting mode, the method has the advantages that automatic control is achieved, the repeated adjusting time in the operation process is remarkably shortened, and the efficiency of adjusting the imaging device to the optimal image collecting position is greatly improved.

Provided in the present application are an image stitching method for an X-ray imaging system, an X-ray imaging method, and X-ray imaging systems. The X-ray imaging system includes an X-ray source, and the image stitching method includes dividing an imaging region of a subject under examination into a first region and a second region, the first region and the second region having an overlapping portion; acquiring a first quantity of X-ray images of the subject under examination by rotating the X-ray source in the first region; acquiring a second quantity of X-ray images of the subject under examination by translating the X-ray source in the second region; and performing image stitching on the first quantity of X-ray images and the second quantity of X-ray images to acquire a medical image of the subject under examination.

Interstitial brachytherapy is a cancer treatment in which radioactive material is placed closely to the target tissue of the affected site using an afterloader (HDR-brachytherapy) or manually (LDR- and PDR-brachytherapy). For HDR-brachytherapy, the accuracy of this placement is calibrated using an external reference system that locates the radioactive material according to the radiation levels measured at locations around the source. At each of these locations, a scintillator produces light when irradiated by the radioactive material. This light is proportional to the level of radiation at each location. The light produced by each scintillator is converted to an electrical signal that is proportional to the light and the radiation level at each location. The radioactive material is located according to the plurality of electrical signals.

The present disclosure belongs to the technical field of X-ray imaging, and particularly relates to a mobile three-dimensional (3D) imaging machine based on an X-ray, and a 3D imaging data acquisition method. The mobile 3D imaging machine based on an X-ray includes a machine body, and a limiting mechanism, an exposure imaging mechanism and a position parameter extraction mechanism which are mounted on the machine body. A relative position between the exposure imaging mechanism and an object to be detected is limited by arranging the limiting mechanism on the machine body, so that the exposure imaging mechanism is able to reach each preset relative position in sequence for exposure imaging, and then, relative position data corresponding to projection data is extracted through the position parameter extraction mechanism.

A CT detector module comprises at least one X-ray converter element which has an upper side and a lower side. At the upper side, the X-ray converter element has an X-ray detector layer, and at the lower side the X-ray converter element is secured to a heat-conducting module carrier. The X-ray converter element is in heat-conducting contact with at least one metal element, and the at least one metal element is in heat-conducting contact with the module carrier.

A dental X-ray imaging system (100) comprises: a dental X-ray imaging unit (102) having an X-ray source part (114), an X-ray imaging detector part (116) with an X-ray detector, and a gantry part (112) for the X-ray source part (114) and the X-ray imaging detector part (116); and a control system (106). The control system (106) controls the parts of the dental X-ray imaging unit (102) to acquire an X-ray scout image (302) of the patient (300) by using a first, larger part of an active area of the X-ray detector, and to acquire panoramic dental X-ray image data of the patient (300) by using a second, smaller part of the active area of the X-ray detector being respective to the panoramic imaging. A method for a panoramic dental X-ray imaging of a patient (300), a computer program (714), and a tangible non-volatile computer-readable medium are also disclosed.

The embodiment of the invention discloses a flat panel detector positioning method, device, system and equipment and a medium, and the method comprises the steps: obtaining an image, collected by an image collection device, of a flat panel detector, and determining the pixel coordinates of a feature mark and a feature point in the image through a positioning model; determining first position attitude information and confidence coefficient according to the pixel coordinates, the internal reference matrix and the physical coordinates of the feature points; according to the confidence coefficient and a preset threshold value, the first position and attitude information is determined to serve as positioning information, or the second position and attitude information is determined to serve as the positioning information, and the second position and attitude information is determined according to the motion state information obtained by the inertial sensor. According to the technical scheme of the embodiment of the invention, the problems of large size and high cost of the flat panel detector positioned by the existing magnetic positioning device are solved, the positioning cost of the flat panel detector can be reduced and the positioning reliability and portability can be improved by combining the positioning mode of visual detection and the inertial sensor, and the method can adapt to different scenes.

Systems and methods are provided for a detector for medical imaging. The detector for medical imaging includes a mesh detector element formed on a planar side of a first semiconductor layer. The mesh detector element includes a metal layer including a plurality of longitudinal strips, where each longitudinal strip is positioned over a respective second semiconductor layer of the opposite doping polarity from the first semiconductor layer, and embedded in the first semiconductor layer. Further, each longitudinal strip is separated from a neighboring longitudinal strip by a respective opening of a plurality of openings, such that the metal layer does not extend continuously across a width of the mesh detector element.

A mobile x-ray device includes a body including a number of wheels rotatably attached thereto and housing operative systems for the obtaining and processing of x-ray data to provide x-ray images, a moveable vertical column and horizontal arm operably connected to the body and including an x-ray emitter opposite the body, a detector configured to receive x-rays from the x-ray emitter and operably connected to the operative systems to transmit x-ray data from the detector to the operative systems, a drive handle disposed on the body, and a detector support having a sleeve defining an interior adapted to receive an edge of a detector therein, and a pair of securing plates extending outwardly from the sleeve and secured to the drive handle. The sleeve can securely engage opposed surfaces of the detector to allow the user / technician to readily position a protective bag around the exposed portion of the detector in a hands-free manner.

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.

Described is a device for radiotherapy treatment with a high dose rate of ionizing radiation, comprising an accelerating guide (11) of a medical radiofrequency accelerator, at least two simultaneously thermostated resonant cavities (10) and comprising a first pick-up (12), a second pick-up (12B) in at least two resonant cavities (10) and an optical system (20) of the beam.

The invention relates to a multi-mode scanning CBCT imaging system, device and method. The multi-mode scanning CBCT imaging system comprises a rotating rack, a ray generating device, a detector and at least three laser positioning devices, the ray generating device, the detector and the at least three laser positioning devices are arranged on the rotating rack, the detector and the ray generating device are oppositely arranged on the rotating rack, and the detector is used for receiving rays emitted by the ray generating device. The laser positioning devices are sequentially arranged at intervals in the circumferential direction of the rotating rack, a ray generating device and a detector in the multi-mode scanning CBCT imaging system can rotate along with rotation of the rotating rack, and the laser positioning devices are used for assisting rapid positioning during different-mode imaging scanning. Therefore, the multi-mode scanning CBCT imaging system can carry out imaging scanning in multiple different modes and does not consume high cost at the same time.

The present invention discloses a static real-time CT imaging system and an imaging method thereof. The system includes two ray source rings and a detector ring; on the Z axis, the left ray source ring and the right ray source ring are arranged on the left and right sides of the detector ring; the left ray source ring and the right ray source ring are respectively annular multi-focus X-ray sources with multiple X-ray sources and the same number of focuses are evenly arranged; the detector ring is composed of multiple X-ray detectors arranged in a ring, and on the Z axis, the multiple X-ray detectors together form a left detector sub-ring, a middle detector sub-ring and a right detector sub-ring; an X-ray source of the left ray source ring is placed between any two adjacent X-ray detectors of the left detector sub-ring; an X-ray source of the right ray source ring is placed between any two adjacent X-ray detectors of the right detector sub-ring; and any two adjacent X-ray detectors of the middle detector sub-ring are in close contact. By using the present invention, a wider Z-direction coverage can be achieved, and cone angle artifacts can be effectively suppressed.

Provided is a management apparatus including: a storage that stores quality control information, which is information on an imaging capability of a radiography apparatus; and a hardware processor that determines whether dynamic imaging by the radiography apparatus is possible in response to a dynamic imaging request, based on the quality control information.

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.

An electron applicator, which is used along with a linear accelerator in a FLASH radiotherapy treatment program, includes an integrated dosimeter for accurately measuring the FLASH radiation levels, and an interchangeable high-density polymer cutout which can be easily, inexpensively, and accurately formed to match the irregular shape of a tumor.

Provided in embodiments of the present application are a positioning assistance method and a medical imaging system. The positioning assistance method includes: obtaining image data captured via an image capture apparatus and including a subject, the image data including optical image data and depth image data; determining, according to the image data, a direction indication line representing at least one anatomical region of interest; and calculating a body region inclination angle according to the direction indication line, the body region inclination angle including at least one of a first included angle and a second included angle, the first included angle representing an included angle between an anatomical region of interest and a plane on which hardware of a medical imaging system is located, and the second included angle representing an included angle between two anatomical regions of interest.

A positron emission tomography, PET, imaging system (100) includes a plurality of detector modules (1301 . . . i). Each detector module (1301 . . . i) includes a cooling unit (130c1 . . . i) with a heat-transfer region (170). The heat transfer region (170) of each cooling unit (130c1 . . . i) is thermally coupled to a photodetector array (130b1 . . . i) of the corresponding detector module for cooling the photodetector array. The cooling units are configured to be fluidically coupled in parallel to at least one cooling fluid source.

The present disclosure may provide a radiation system including a first rotation portion, a second rotation portion, a treatment head, one or more imaging sources, and at least one detector. At least a portion of the treatment head may be disposed in the first rotation portion. At least one of the one or more imaging sources may be disposed in the second rotation portion. The second rotation portion may be able to rotate independently from the first rotation portion.

One or more example embodiments relates to a computer-implemented method for supporting the evaluation of characterization data of an X-ray detector for an X-ray imaging system, in particular for a computed tomography system, with a plurality of detector modules, wherein the method comprises the following steps: receiving characterization data for the detector modules of the X-ray detector, wherein at least part of the characterization data is based on measurement data of the detector modules recorded without an examination object; applying a trained algorithm to the characterization data, wherein the output generated is synthetic image data simulating image data of an X-ray imaging system, in particular a computed tomography system, recorded with the X-ray detector; providing the synthetic image data.

The invention relates to an offset detection method and device of a detector and a medical imaging system.The offset detection method of the detector comprises the steps that actual measurement coordinates of a target motif projected on the detector are obtained, and estimated coordinates of the target motif projected on the detector are determined based on a spatial position model; the spatial position model is obtained by performing physical modeling on the medical imaging system; and solving the geometric offset of the detector according to the difference between the actually measured coordinates and the estimated coordinates and a spatial position model between the estimated coordinates and the geometric offset of the detector. According to the method, an optimization algorithm is combined with a three-dimensional reconstruction algorithm, according to a difference value between a measured value and an estimated value of a projection coordinate of a target motif, accurate solution of geometric offset is realized, and high-precision optical equipment is not needed, so that the application cost of geometric correction can be reduced; in addition, periodic correction can be achieved in the use process of the medical imaging system, and then the hardware cost of geometric correction is reduced.

A surgical frame incorporating an electromagnetic-radiation imaging device, and a radiation-mitigation system for use with the surgical frame are provided. The surgical frame can be capable of reconfiguration before, during, or after surgery, and can include a main beam that can be rotated, raised / lowered, and tilted upwardly / downwardly to afford positioning and repositioning of a patient supported thereon. The surgical frame can support the electromagnetic-radiation imaging device. One of an emitter and a receiver of the electromagnetic-radiation imaging device can be positioned under the main beam of the surgical frame, and the other of the emitter and the receiver of the electromagnetic-radiation imaging device can be positioned over the main beam of the surgical frame. The radiation-mitigation system can serve to intercept / block and mitigate at least some of the scatter of the electromagnetic radiation from the emitter.