293results about "Radiation detection arrangements" patented technology

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.

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.

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.

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.

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 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.

A multisource interventional X-ray imaging system including a ring assembly is disclosed. The ring assembly may include a first arc including a plurality of X-ray sources, and a second arc including a plurality of detectors. The X-ray sources and the detectors may be arranged to view a patient. Further, the ring assembly may axially rotate or wobble by a maximum angular displacement that is equivalent to a distance between adjacent X-ray sources.

A computer-implemented method of measuring a blood flow parameter in a vasculature, is provided. The method includes: analyzing spectral CT projection data to isolate from the spectral CT projection data, contrast agent projection data representing the flow of the injected contrast agent; sampling the contrast agent projection data at one or more regions of interest in the vasculature to provide temporal blood flow data at the one or more regions of interest; and calculating, from the temporal blood flow data, a value of one or more blood flow parameters at the one or more regions of interest.

Various methods and systems are provided for a slab phantom set of an imaging system. The imaging system (200) comprises a gantry (322) including a radiation source (302) and a detector (314). A housing (306) is further positioned in the gantry, adjacent to the radiation source. The housing includes a slab phantom set (304) that comprises at least one slab phantom (324, 326). The slab phantom set is configured such that at least one slab phantom of the slab phantom set is independently movable to enable one or more of the at least one slab phantom of the slab phantom set is to be selectively positioned in a path (312) of a radiation beam (308) between the radiation source and the detector.

The application relates to a medical imaging system, a medical imaging method and a computer readable storage medium. The method comprises the following steps: obtaining first projection data by detecting radioactive rays passing through a first scanning field of view, and simultaneously detecting a part of radioactive rays in radioactive rays not passing through the first scanning field of view but passing through a second scanning field of view to obtain second projection data, wherein the second scanning field of view is larger than the first scanning field of view, and the first scanning field of view is located in the second scanning field of view; obtaining third projection data corresponding to the second scanning field of view based on the first projection data and the second projection data; and reconstructing a tomographic image in the second scanning field of view based on the third projection data. Through the application, the problem that the signal in the extended scanning field of view obtained by speculation is greatly different from the real signal in the related art is solved, and the reconstruction quality of the computer tomographic image is improved.

A radiation detector includes: a sensor panel; a scintillator panel; and a resin frame provided across the sensor panel and the scintillator panel, in which the sensor panel has a mounting surface where the scintillator panel is mounted, the scintillator panel includes a support body having a first surface, a second surface on a side opposite to the first surface, and a first side surface connecting the first surface and the second surface to each other, and a scintillator layer formed on the first surface and containing a plurality of columnar crystals, the scintillator panel is mounted on the mounting surface such that the scintillator layer and the first surface face the mounting surface, and the scintillator layer has a second side surface extending so as to be positioned on the same plane as the first side surface.

This scintillator unit comprises: a support; a scintillator layer disposed on the support and including a plurality of columnar crystals; an optical functional layer disposed on an effective portion of the scintillator layer; and a moisture-proof layer integrally covering both the scintillator layer and the optical functional layer. The moisture-proof layer is in contact with the plurality of columnar crystals at an outer edge of the scintillator layer and enters gaps of the plurality of columnar crystals.

An X-ray CT apparatus (1) according to an embodiment includes an x-ray source (12a), scan control circuity (33), a detector (13), photon counting circuits (42-n), connection circuitry (44) and processing circuitry (43). The scan control circuity (33) controls the x-ray source (12a) to expose a subject with x-rays over a scan having a plurality of views. The detector (13) is disposed to receive x-rays from the x-ray source (12a) and has plurality of pixels arranged in groups. The photon counting circuits (42-n) is provided for each of the pixels respectively. The connection circuitry (44) selectively connects, in a first mode, each pixel to one of the photon counting circuits (42-n) respectively and, in a second mode, each pixel in a group to a same one of the photon counting circuits (42-n). The processing circuitry (43), is connected to the connection circuitry (44) and the photon counting circuits (42-n), selects, for each of the views, the first mode or the second mode based upon a count rate of the x-rays.

Systems and methods are provided for performing computed tomography (CT) scans using different detector materials within a single CT system. In one embodiment, a CT system comprises a hybrid detector assembly coupled to a rotatable portion of a gantry of the CT system, the hybrid detector assembly including a plurality of detector arrays, the detector arrays separated along a direction parallel to an axis of motion of a table of the CT system, each detector array of the plurality of detector arrays including a different detector material. The hybrid detector assembly may be mounted on a translation mechanism configured to allow a position of the hybrid detector assembly to change within the rotatable portion of the gantry between a first acquisition of projection data and a second acquisition of projection data, to center an x-ray tube on a detector array of the hybrid detector assembly having a desired detector material.

This image acquisition device operates in a state of being connected to an external device. The image acquisition device comprises: an imaging unit that acquires an imaging signal by detecting light; and a control unit that generates image data on the basis of the imaging signal. The imaging unit is configured to automatically transition to a detection-capable state in which light can be detected, in response to power supply from an external device. The imaging unit has an image sensor and a fiber optic plate disposed on the image sensor. The control unit has: a processor that executes a program for generating image data, which is data in a file format processable by the external device, on the basis of the imaging signal; a memory in which the program is expanded; and an external connection unit that outputs the image data to the external device.

This X-ray fluoroscopic imaging device (100) is provided with a top board (2), a top board operation unit (51) and a control unit (31), in which the control unit is configured such that the top board is moved in accordance with an operation input to the top board operation unit in a first control when the movement of the top board is not inhibited, and is also configured such that a center (42a) of an irradiation field (42) of X ray in an X-ray image (41) in a display unit (40) is moved while preventing the movement of the top board in accordance with an operation input to the top board operation unit in a second control when the movement of the top board is inhibited.

The present application discloses an imaging device, comprising: a position information acquisition module for obtaining position information of a target organ; an irradiation depth determination module for determining the irradiation depth of imaging rays from a detection point into the interior of a human body based on the position of the detection point and the target detection depth; a light source focus control module for determining the focus information of multiple light sources based on a preset magnification and irradiation depth; an irradiation module for controlling the multiple light sources to generate imaging rays to irradiate the detection point based on the focus information; an imaging module for obtaining first imaging information of a tomographic scan based on a first remaining imaging ray passing through the detected position of the target organ; and obtaining an image of the target organ based on the first imaging information. The imaging device provided in the embodiments of the present application is capable of performing microscopic imaging of a target organ using imaging rays.