214results about "Radiation detection arrangements" patented technology

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.

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.

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.

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 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.

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.

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 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.

An apparatus and method for calibrating a photon-counting computed tomography (PCCT) apparatus, includes performing for each offset from a rotation center, a scan of a calibration phantom placed at the offset to obtain calibration data including measured count rate data. Location parameters of the calibration phantom are estimated for each of the plurality of offsets, based on the obtained calibration data. Thickness data of the calibration phantom is determined based on the estimated location parameters. A curve is estimated, by curve fitting using the measured count rate data and the determined thickness data, indicating a relationship between the energy bin count rate and phantom thickness, for each energy bin of each pixel of the plurality of pixels. A first look-up table is generated for pixel-to-pixel count rate variation correction, and the first look-up table is applied to acquired energy bin count data to reduce ring artifacts in an image reconstructed using the acquired energy bin count data. A second look-up table is generated for both pixel-to-pixel count rate variation correction and additional count-rate non-linearity correction, using water as the calibration material, and the second look-up table is applied to reduce both ring artifacts and cupping or doming artifacts in an image reconstructed using the acquired energy bin count data.

The present application relates to a kind of CT detector and CT equipment, including multiple CT detector modules, CT detector installation shell and multiple installation supports.The CT detector installation shell surrounds and forms accommodating cavity.The CT detector installation shell is provided with first air duct.Multiple installation supports are used to install CT detector module.Multiple installation supports are arranged in the accommodating cavity.The installation support is provided with second air duct.The first air duct and the second air duct are communicated.When the CT detector module is installed in the installation support, the heat generated by the detector during operation can be conducted to the installation support.The installation support can transfer heat to the second air duct.The first air duct can introduce air into the second air duct.Air can take away the heat in the second air duct, so that heat can be avoided in the CT detector module Accumulation, ensure that the temperature of the detector during operation is maintained at a lower level.

Embodiments of the present application provide a radiation detector assembly and a medical imaging device. The radiation detector assembly includes: a main circuit board, including a first region and a second region, wherein a detector component irradiated by rays is mounted in the first region, and a signal processing component that receives a signal generated by the detector component is mounted in the second region; a thermal control assembly, thermally coupled to the first region of the main circuit board; and a support assembly, supporting the main circuit board and thermally coupled to the second region of the main circuit board.

To provide a dental X-ray imaging system for dental X-ray imaging of a patient.SOLUTION: The system comprises a dental x-ray imaging unit comprising an x-ray source portion, an x-ray imaging detector portion comprising an x-ray detector, and a gantry portion comprising the x-ray source portion and the x-ray imaging detector portion, and a control system. The control system controls the part of the dental x-ray imaging unit to acquire an x-ray scout image by using a first part of the active area of the x-ray detector, and controls the part of the dental x-ray imaging unit to acquire panoramic dental x-ray image data by using a second part of the active area of the x-ray detector corresponding to panoramic imaging. The first portion of the active area is larger than the second portion. The invention also relates to a panoramic dental X-ray imaging method, a computer program and a computer-readable medium.SELECTED DRAWING: Figure 1

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 application relates to the field of positron emission tomography technology, in particular to a multi-channel high-precision PET circuit acquisition system and a use method thereof, and the system comprises the following: an FPGA control board, which is used for controlling bias voltage programming output voltage values, controlling current programming output voltage values and current values according to DAC bias voltage values received from an upper computer, and sending DUT board configuration information received from the upper computer to a DUT board; and the DUT board, which comprises multi-channel high-precision PET circuits, each circuit is configured through an SPI protocol according to DUT board configuration information received from the upper computer, 16 channels are adopted to collect time electric signal information output by a PET detector, and 64 channels are adopted to collect energy electric signal information output by the PET detector. In the application, the multi-channel high-precision PET circuit acquisition software and the hardware of the control system are portable, the upper computer software program is programmable, and the operation is simple.

The present invention discloses a method, a device, and a system for X-ray CT imaging with magnetic nanoparticles and belongs to the field of magnetic nanoparticle imaging. The method comprises: rotating a target object containing the magnetic nanoparticles as a contrast agent by one revolution relative to X-rays (where a periodically varying excitation magnetic field is present, the axis of which is parallel to the axis of the X-rays), whereby several successive transmission projection images of the target object are acquired from each angle;Performing image post-processing on the transmission projection images at any angle and a back-projection transformation on the projection images of the magnetic nanoparticle imaging at all angles to obtain CT imaging results, wherein the image post-processing comprises: time-frequency transformation, wherein a third dimension of the three-dimensional time domain matrix is ​​converted into a frequency domain to obtain a three-dimensional frequency domain matrix; feature extraction, wherein a two-dimensional matrix with frequency kf is selected along the third dimension of the three-dimensional frequency domain matrix to obtain projection images of the magnetic nanoparticle imaging, where k is a positive integer and f is the frequency of the excitation magnetic field. The present invention can improve the contrast of X-ray CT imaging.

The invention relates to the technical field of detectors, and discloses a control method and device of a micro-channel type detector for ultra-low dose imaging. The method comprises the following steps: carrying out scintillator direct conversion on incident X-rays to obtain an initial electronic signal, and inputting the initial electronic signal into a micro-channel array to carry out high-voltage electric field accelerated collision to obtain a multiplied electronic signal; performing current monitoring on the multiplication electronic signal to obtain real-time multiplication gain data; performing extended Kalman filtering adjustment on the working voltage of the micro-channel array according to the real-time multiplication gain data to obtain a target voltage parameter; performing temperature drift and aging compensation based on the target voltage parameter to obtain gain stability control data; and inputting the gain stability control data into a multi-target optimization algorithm to carry out pixel consistency processing, and generating a target X-ray image. According to the invention, the real-time optimization adjustment of the working voltage of each micro-channel is realized, and the imaging quality equal to the normal dose is obtained under the 1 / 1000 ultra-low dose condition.

This application discloses a dental X-ray alignment device and oral imaging method based on Hall sensor technology. The alignment device is used for aligning a DR sensor and a dental X-ray machine, wherein the dental X-ray machine is connected to an X-ray tube head. The alignment device includes a Hall sensor, a fixed ring, and a magnetic ring. The magnetic ring is fixedly connected to the fixed ring, which is located on the X-ray tube head, with the center of the magnetic ring and the center of the fixed ring coinciding with the center of the X-ray tube head. The Hall sensor is located on the DR sensor, and the signal communication of the Hall sensor is connected to a host computer. The Hall sensor senses the strength and direction of the magnetic field, and the position of the magnetic ring is identified by judging the strength and direction of the magnetic field. After alignment, the patient's oral cavity can be quickly, conveniently, and efficiently imaged, reflecting the depth information of the internal anatomical features of the teeth. The oral treatment process is made more intelligent, thereby improving clinical efficiency, reducing the number of imaging sessions, and reducing X-ray radiation for patients.

A bedside X-ray imaging system includes a mobile platform independent of a patient bed. A wheeled base with locking stabilizes the platform adjacent to the bed. A vertical support provides height alignment to a patient support surface. A conveyor belt deploys a detector housing carrying an X-ray detector from a retracted to an extended position beneath the patient. Deployment depth is indicated by markings on the belt or by a panel that reports detector position. A controller actuates the conveyor to place and retract the housing. The system can establish a calibrated coordinate relationship with an external X-ray source and provide planar in-housing X-Y displacement for fine positioning and continuous tracking during procedures.

To provide a radiological imaging system having a storage medium with a trained model suggesting the need for additional imaging.SOLUTION: In one embodiment, a radiological imaging system is provided, the system including a storage medium having a trained model using, as learning data, a first radiological image obtained using a first condition and a second radiological image obtained by additional imaging using a second condition set on the basis of the first radiological image. The learning data of the trained model has, as annotation information, at least a reason for additional imaging. The trained model outputs, when a third radiological image is input, the need for additional imaging and a reason why the additional imaging is necessary as a re-acquisition factor.SELECTED DRAWING: Figure 3

This intraoral imaging device is a device that operates by being connected to an external device. The intraoral imaging device comprises an imaging unit that acquires an imaging signal relating to an object by detecting radiation transmitted through the object, and a control unit that generates image data relating to the object on the basis of the imaging signal. The imaging unit is configured to automatically transition to a detectable state in which radiation transmitted through the object can be detected, in response to power supply from an external device. The control unit has a processor that executes a program for generating image data, which is data in a file format that can be processed by an external device, on the basis of the imaging signal, memory to which the program is loaded, and an external connection unit that outputs the image data to the external device.