412results about "Radiation detection arrangements" patented technology

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 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.

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.

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.

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.

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 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.

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 the technical field of medical apparatus and instruments, and discloses a multi-degree-of-freedom moving DR mechanical arm system of a bionic joint structure, comprising: an acquisition module for acquiring a relative position between an examined part of a patient and an image plate and acquiring examination information of the patient; the processing module is used for calculating a difference value between the image plate and the examined part of the patient; the control module is used for sending an instruction to the moving mechanism based on the difference value; the comparison module is used for outputting a reference difference value between the target position and the current position of the ray machine and a reference difference value between the target position and the current position of the image plate; and the correction module is used for correcting the positions of the ray machine and the image plate. By arranging the acquisition module, the processing module, the control module and the moving mechanism, the relative positions of the examined part of the patient, the image plate and the ray machine are acquired and adjusted, the purpose of automatically adjusting the pose of the DR equipment is achieved, and the problems of low efficiency and poor positioning precision caused by mainly depending on manual operation are avoided.

A computer-implemented method for measuring blood flow parameters in a vasculature is provided, the method comprising the steps of analyzing spectral CT projection data to isolate contrast agent projection data representative of flow of an injected contrast agent from the spectral CT projection data, sampling the contrast agent projection data at one or more regions of interest in the vasculature to provide temporal blood flow data in the one or more regions of interest, and calculating values ​​of one or more blood flow parameters in the one or more regions of interest from the temporal blood flow data.

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.

Disclosed is a self-powered perovskite X-ray detector. The self-powered perovskite X-ray detector according to an embodiment of the present invention has a shape wherein a scintillator converting incident X-rays into visible light is combined with a perovskite photodetector, wherein the scintillator and the perovskite light absorption layer include a perovskite compound represented by Formula 1 below:         [Formula 1]     AaMbXc where A is a monovalent cation, M is a divalent metal cation or a trivalent metal cation, X is a monovalent anion, a+2b=c when M is a divalent metal cation, a+3b=4c when M is a trivalent metal cation, and a, b, and c are natural numbers.

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.

A radiation imaging device according to one embodiment of the present invention comprises: a detection panel that detects radiation; a support member that supports the detection panel, the support member having a first portion extending along a plane orthogonal to a first direction orthogonal to the detection panel, and a second portion extending from the first portion along the first direction and formed integrally with the first portion; a wiring board to which a signal read out by the detection panel is input from the detection panel; and a housing that accommodates the detection panel, the support member, and the wiring board, and that has side wall members extending along the first direction. The support member is fixed to the housing by screwing the second portion and the side wall members, and the length along the first direction of the second portion is greater than the thickness along the first direction of the first portion.

The present application discloses a radiation flat panel detector and a radiation imaging device, wherein the radiation flat panel detector is characterized in that it includes a substrate and a plurality of composite pixel units formed on the substrate, each composite pixel unit includes a switch element and a conversion component, the switch element is formed on the substrate; the conversion component is formed on the side of the switch element away from the substrate, and includes an imaging element and a detection element, and the orthographic projection of the detection element on the substrate at least partially overlaps with the orthographic projection of the switch element on the substrate. The radiation flat panel detector provided by the present application can achieve a balance between simplified device connection and flat panel detector performance.

An X-ray imaging system (100, 200) includes an X-ray radiation source (105, 205) and an X-ray detector (107, 207) disposed on a gantry structure (109, 220). An X-ray imaging system (100, 200) includes a controller (150, 250) configured to perform an action. The actions include defining a virtual wall (602) within a room (606) within which the X-ray imaging system (100, 200) is disposed and receiving a selected set of predefined positions to move the gantry structure (109, 220) from a starting position at which the gantry structure (109, 220) is disposed adjacent to or around the patient table (604) to the predefined position, where the gantry structure (109, 220) is disposed adjacent to or around the patient table (604). The virtual wall (602) has a predefined position to image the subject with the X-ray imaging system (100, 200), and wherein the predefined position is parallel to the virtual wall (602). The actions include receiving an actuation signal that moves the gantry structure (109, 220) from a starting position to a predefined position in a compact motion and moving the gantry structure (109, 220) from the starting position to the predefined position in the compact motion.

The present invention discloses a multi-gain flat-panel detector and a reading data processing method, belonging to the field of image processing. The multi-gain flat-panel detector includes a scintillator layer and a reading circuit layer. Before reading, the reading circuit layer detects and corrects the signal and then outputs the image. Each pixel of the read image corresponds to its own independent thin-film transistor array, control circuit, and analog-to-digital converter, thereby achieving independent pixel reading. In addition, the overall capacitance of the charge amplifier can be adjusted by software control of the switching of the circuit containing the individual capacitors in the charge amplifier, thereby achieving control of the reading gain, solving the problems of data saturation and low data signal-to-noise ratio that are prone to occur in flat-panel detectors.

The invention relates to a computer-implemented method (M1) for more accurately providing data of a load distribution (16) of a radiation (6) from a radiation source (4) of an imaging system (1), comprising the steps: - receiving setting data (10) of the imaging system (1); - receiving a radiation exposure characteristic (14) associated with the setting data (10); - receiving data of an intensity distribution (15) of the radiation (6) associated with the setting data (10) at a radiation detector (3) of the imaging system (1); - applying a trained first function (11) to the setting data (10), the load characteristic (14) and the intensity distribution data (15) as first input data of the trained first function (11), wherein the load distribution data (16) are generated as first output data of the trained first function (11); - Providing load distribution data (16). The invention further relates to a data processing device (2), a computer-implemented training method (M2), a computer program product (8) and an imaging system (1).

A ceramic scintillator array 1 according to an embodiment of the present invention is provided with a plurality of scintillator segments 2 and a reflective layer. The reflective layer contains a resin composition. The resin composition contains a transparent resin and an additive. Dibasic acid esters serve as the additive.

The invention relates to a dental X-ray imaging system (100) for dental X-ray imaging of a patient (300). The system (100) comprises: a dental X-ray imaging unit (102) comprising: an X-ray source portion (114), an X-ray imaging detector portion (116) comprising one X-ray detector, and a gantry portion (112) comprising the X-ray source portion (114) and the X-ray imaging detector portion (116); and a control system (106). The control system (106) is configured to: control the portion of the dental X-ray imaging unit (102) to acquire an X-ray localization image (302) of the patient (300) by using a first portion of an active area of the X-ray detector; and control the portion of the dental X-ray imaging unit (102) to acquire panoramic dental X-ray image data of the patient (300) by using a second portion of the effective area of the X-ray detector corresponding to panoramic imaging. The first portion of the active area is larger than the second portion of the active area. The invention also relates to a method for panoramic dental X-ray imaging of a patient (300), a computer program (714) and a tangible non-volatile computer readable medium.

Provided is an X-ray imaging apparatus that enables an operator to freely manually move an X-ray source along a rail installed on a ceiling or a floor, and can capture a fluoroscopic image. An X-ray control unit continuously emitting X-rays from an X-ray source and permits fluoroscopy only in a case in which one or more predetermined conditions, including a condition in which the X-ray source is stopped at a predetermined position on a rail corresponding to a position at which an X-ray detector is held, are satisfied. Specifically, the X-ray control unit enables an operation of a fluoroscopy switch, and continuously supplies a tube current and a tube voltage to the X-ray tube in a case in which the operator operates the fluoroscopy switch.

The present invention relates to the technical field of digital X-ray imaging methods, and discloses an imaging device using slit scanning, comprising: a transmitting end for collimating X-rays into slit X-rays, continuously transmitting slit X-rays to an object to be imaged, and allowing the object to be imaged to be completely captured by the slit X-rays in a linear manner; and a receiving end for automatically activating a slit region of interest corresponding to the slit X-ray emission direction on the receiving end after each transmitted slit X-ray passes through the object to be imaged, acquiring the attenuated slit X-rays, converting them into slit images with the same range as the slit X-rays for storage, and splicing the slit images after they are completely captured. By collimating X-rays using slit scanning, the magnification effect of point light source imaging is avoided, and the device can be used to acquire images of a patient in true proportion. Furthermore, the radiation dose received is much lower than that of spiral scanning, being at the level of ordinary radiation.

The invention discloses an X-ray emission regulation and control mechanism for three-dimensional reconstruction, a double suspension type DR and a use method, and relates to the technical field of medical imaging equipment, the X-ray emission regulation and control mechanism comprises an X-ray emission mechanism, a control box, a rotating mechanism, a lifting mechanism and a linkage mechanism, the X-ray emission mechanism is used for generating and emitting X-rays; the control box is electrically connected with the X-ray emission mechanism and is used for receiving an external instruction and regulating and controlling emission parameters of the X-rays; the rotating mechanism is used for bearing the X-ray emission mechanism and driving the X-ray emission mechanism to rotate so as to realize multi-angle X-ray emission; the lifting mechanism is used for bearing the control box and driving the control box to lift; the linkage mechanism is in transmission connection with the rotating mechanism and the lifting mechanism, so that when the rotating mechanism drives the X-ray emission mechanism to rotate, the linkage mechanism synchronously drives the lifting mechanism to drive the control box to ascend and descend, the rotating path of the X-ray emission mechanism is avoided, the equipment size is effectively reduced, and the scanning angle range and the imaging quality of three-dimensional reconstruction are improved.

The radiation detector includes a sensor substrate, a conversion layer, and a reinforcement substrate. The sensor substrate has a plurality of pixels formed in a pixel region of a flexible substrate, which accumulate charges generated by light converted from radiation. The conversion layer is provided on one side of a first surface of the substrate where the pixels are provided, and converts radiation into light. The reinforcement substrate is for strengthening the rigidity of the substrate, is provided on a surface of the conversion layer opposite to the surface on the substrate side, and includes a porous layer having a plurality of through holes.

The invention provides a stand column assembly for an X-ray imaging system and the X-ray imaging system. The stand column assembly comprises a base and a stand column which are assembled together. The base is used for being placed on a horizontal supporting face, is fixed relative to the supporting face and is used for supporting an object to be imaged. The stand column comprises a main body part and an X-ray detector, the main body part is rotationally connected with the base and stands up relative to the supporting face, and the X-ray detector is installed on the main body part. In addition, there is a rotation axis perpendicular to the support surface and passing through the base, and the main body portion is rotatable about the rotation axis within a predetermined range relative to the base.