335results about "Radiation generation arrangements" patented technology

The invention discloses an X-ray machine inspection parameter automatic configuration system for pet inspection, and relates to the technical field of medical imaging equipment, a displacement prediction model is used for pre-judging a pet convulsion state before exposure, a dynamic exposure trigger is only activated in a stable interval, and motion blur is avoided from the source; compared with the scheme of relying on post-exposure image feedback adjustment in the prior art, invalid radiation and repeated exposure operation can be avoided; the partition parameter mapping module is combined with a species feature database to map the gray level of the preview image into equivalent thickness and independently generate region parameters; aiming at extreme body type difference, such as an abdominal fat layer of an obese dog and a rib region of an emaciated cat, the system automatically distributes differentiated kV / mA parameters, and the problem of overexposure or underexposure caused by a traditional fixed penetration rate standard is eliminated; and the radiation fusing unit monitors the accumulated dose in real time, dynamically adjusts a safety threshold according to the weight of the pet, and stops exposure before the dose exceeds the limit.

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.

To provide techniques capable of shorting the time required for calibration.SOLUTION: An embodiment comprises: determining an effective voltage value V1 of a high kV on the basis of energy information of X-rays detected in a first sub-region of a detector assembly and energy information of X-rays detected in a second sub-region of the detector assembly, when the high kV is applied to an X-ray tube; determining an effective voltage value V2 of a low kV on the basis of energy information of X-rays detected in the first sub-region of the detector assembly and energy information of X-rays detected in the second sub-region of the detector assembly, when the low kV is applied to the X-ray tube; calculating a correction coefficient required to correct beam hardening on the basis of the effective voltage value V1; and calculating a correction coefficient required to correct beam hardening on the basis of an effective voltage value V2.SELECTED DRAWING: Figure 15

The present disclosure relates to a method for imaging and an imaging system. The method includes obtaining a scanning protocol for an examination subject, which includes: obtaining calibration data associated with the scanning protocol in response to a commonly used scanning protocol calibration data set of a medical imaging system including the calibration data; or performing a calibration operation in response to a commonly used scanning protocol calibration data set of a medical imaging system not including calibration data associated with the scanning protocol, to generate calibration data associated with the scanning protocol. The method further includes scanning the examination subject based on the scanning protocol, to obtain raw imaging data, and performing reconstruction using the calibration data associated with the scanning protocol and the raw imaging data, to obtain a medical image of a scanned subject.

A method, apparatus, and computer-readable storage medium for controlling X-ray computed tomography (CT) imaging. A first set of projection data is acquired in a first CT scan of an object with a CT imaging apparatus. The first CT image data is reconstructed from the first set of projection data. X-ray tube current modulation information is determined for a second CT scan of the object, based on a noise propagation model between X-ray projection data and CT image data, and using, as inputs, the obtained first set of projection data, information indicating an imaging region-of-interest (ROI) for the second CT scan, and a target image quality level in the imaging ROI. The second CT scan of the object is obtained based on the obtained X-ray tube current modulation information.

An imaging system (MIS), optionally a medical imaging system, with wireless communication capability and related method. The imaging system comprises a gantry (RG) rotatable around a rotation axis. The gantry includes a detector device (D) capable of recording, in plural spatial positions, measurement data in relation to a subject (such as a patient) (PAT) to be imaged. The system also includes a radio transmitter (TX) for generating a directed radio beam propagatable along a propagation axis to transmit the measurement data to a radio receiver (RX). The radio transmitter (TX) is arranged at the rotatable gantry and is operable so that the propagation direction intersects the rotation axis in a location that is situated away from the rotatable gantry.

Embodiments of the present disclosure may provide a system, a method, and a device for X-ray imaging. The method may include: obtaining a grayscale of a current frame of an object, wherein the current frame is obtained by performing X-ray imaging on the object based on current performing parameters; determining an updated equivalent phantom thickness of the object based on the grayscale of the current frame, the current performing parameters, and a pre-stored correspondence, wherein the pre-stored correspondence reflects dose values corresponding to a plurality of equivalent phantom thicknesses and a plurality of performing parameters; and determining target performing parameters of a next frame of the object based on the updated equivalent phantom thickness, a target grayscale, and the pre-stored correspondence.

The invention relates to a method for operating an X-ray device, comprising a carrier, in particular a C-arm, and an adjusting device at least for moving the carrier for setting a projection geometry. The method comprises: providing a vascular model of a vascular structure of an examination subject, in which a target position of an instrument movable in the vascular structure is marked in the vascular model, providing an initial position of the instrument in the vascular structure of the vascular model, and providing a path from the initial position to the target position; specifying a support point along the path; in the optimization process of the target function by using the blood vessel model, the optimization trend of the projection geometric structure is determined aiming at the supporting points; wherein the objective function comprises at least one first term relating to optimization of the image content of the observer at the respective support point and at least one second term that minimizes the number of changes in the projection geometry along the path by movement of the carrier; and determining, for each projection geometry, an adjustment parameter for controlling the adjustment device.

The embodiment of the invention relates to the technical field of tomography, in particular to a medical CT imaging system which comprises a CT imaging system and method, and the CT imaging system comprises a scanning module, a detection module and a reconstruction module; the scanning module comprises a rack, a workbench and an array X-ray light source module; the array X-ray light source module comprises a plurality of groups of light source assemblies which are arranged along the axial direction, each group of light source assembly comprises a plurality of ray source arrays, and the plurality of ray source arrays enclose to form 360 degrees; the ray source array comprises a plurality of ray source units, and rays emitted by each unit cover a part of an imaging object to form a multi-center scanning structure; the detection module comprises a plurality of detectors arranged on the inner side of the rack; and the reconstruction module is used for receiving the projection data, performing image reconstruction and acquiring image internal information. According to the CT imaging system based on the static X-ray source, the imaging object can be scanned under the condition that the light source is static, and the internal structure of the reconstructed object is obtained.

The invention relates to a power supply circuit for an X-ray device, comprising a voltage supply unit and a monitoring unit, wherein the power supply unit has an operating path and a maintenance path, wherein the operating path is designed to supply several components of the X-ray device for normal operation, wherein the maintenance path is designed to feed a subset of the plurality of components of the X-ray device for maintenance operation, wherein the monitoring unit is designed to detect an input voltage at a voltage supply input of the voltage supply unit by means of a sensor, wherein the voltage supply unit is designed to provide an electrical operating voltage via the operating path or an electrical maintenance voltage via the maintenance path to the respective components as a function of the input voltage. The invention further relates to an X-ray device and a method for operating an X-ray device.

The invention provides a geometric calibration method and device for a linear track CT scanning system. The linear track CT scanning system comprises a radiation source, a detector and a conveying component. The geometric calibration method for the linear track CT scanning system comprises the following steps: acquiring initial values of geometric parameters of the linear track CT scanning system according to a projection image of a calibration die body, the geometric parameters comprise a relative offset distance between a radiation source and the center of a detector, an in-plane inclination angle of the detector, a distance from the radiation source to the center of the detector and a distance from the radiation source to the center of a conveying component; establishing a target function used for calibrating the geometric parameters of the linear track CT scanning system according to the marked area of the reconstructed image of the test die body; and iteratively updating the geometric parameters of the linear trajectory CT scanning system based on the target function and the initial values of the geometric parameters of the linear trajectory CT scanning system so as to obtain target values of the geometric parameters of the linear trajectory CT scanning system.

A radiographic imaging apparatus and a radiation detector are provided, which are capable of sufficiently reducing the sensitivity difference between pixels even if the incident photon rate is high. A radiographic imaging apparatus includes: a radiation source for irradiating an object with radiation; a plurality of detection element modules each having a semiconductor layer that generates electrical charges depending on photon energy of the radiation, and a photon counting circuit for counting the electrical charges for each pixel; and a collimator that is disposed between the radiation source and the semiconductor layer, and has a plurality of walls forming a plurality of passage holes through which the radiation passes. A plurality of subpixels is formed on the semiconductor layer, and when one or more subpixels defined by the walls of the collimator are grouped as a macro pixel, a plurality of macro pixels arranged from each end of each of the detection element modules is smaller in size than a macro pixel other than the plurality of macro pixels arranged from the end of the detection element module.

Systems and methods are provided for increasing installation efficiency and high voltage stability of high voltage connector of a medical imaging system. In one embodiment, a high voltage connector for a medical imaging system comprises a generator side interface configured to couple to a high voltage generator, a tube side interface configured to couple to an X-ray tube, and an insulated conductor flexibly coupling the generator side interface and the tube side interface, wherein the generator side interface is positionable in an installation position and an operational position.

Disclosed herein are a method of controlling a bipolar high-voltage generator and an X-ray system. The bipolar high-voltage generator is connected to a load for supplying a cathode voltage and an anode voltage to the load. The bipolar high-voltage generator includes a first transformer and a second transformer. The first transformer is provided in an output circuit of the anode voltage, and the second transformer is provided in an output circuit of the cathode voltage. The method of controlling includes: obtaining a target voltage difference of the bipolar high-voltage generator, wherein the target voltage difference is within a preset range; and adjusting a working state of at least one of the first transformer and the second transformer based on the target voltage difference. The target voltage difference is defined as a difference between an absolute value of a target anode voltage and an absolute value of a target cathode voltage output from the bipolar high-voltage generator.

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.

The collimator (3) for a radiological equipment (1) comprises shielding means (6, 7, 9, 10, 11) made of tungsten-based radiation-absorbent plastic material; such means may be proximal radiated field closure elements and / or radiated field propagation elements; such means comprise at least one radiated radiogenic field propagation element (6).

This application discloses an oral CT scan, comprising: an X-ray source configured to emit X-rays to irradiate an object; a detector configured to detect X-rays passing through the object to generate X-ray data; and a rotation mechanism configured to rotate the X-ray source and the detector around a rotation axis around the object, wherein the X-ray source includes multiple X-ray sources, and the multiple X-ray sources are capable of rotating around a rotation axis perpendicular to a surface of the detector. The oral CT scan of this application enables multimodal integration, expanding the usability of oral CT scans.

The invention relates to a method for medical imaging and a medical imaging system. The method comprises the following steps: acquiring a scanning protocol for an inspection object; aiming at the scanning protocol: responding to calibration data associated with the scanning protocol included in a common scanning protocol calibration data set of the medical imaging system, and obtaining the calibration data; or in response to the fact that the calibration data associated with the scanning protocol is not included in the common scanning protocol calibration data set of the medical imaging system, performing calibration operation to generate the calibration data associated with the scanning protocol; scanning the examination object based on a scanning protocol to obtain original imaging data; and using calibration data associated with the scanning protocol and the original imaging data for reconstruction to obtain a medical image of the scanned object.

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.

In order to achieve effective cooling, an X-ray emitter with a tube housing having a vacuum is provided. At least one anode is arranged in the tube housing, such that the anode is irradiated by an electron beam generated in a cathode and accelerated through an electrical field. The anode is excited, such that an X-ray deceleration radiation is emitted. The X-ray emitter has a thermoelectric converter (e.g., at least one thermophotovoltaic cell) for generating electrical energy. The thermoelectric converter is arranged, such that the thermoelectric converter may be irradiated at least in part by a heat radiation emanating from the anode.

The application relates to an image registration method, an imaging device, an intraoperative guiding intervention system and a storage medium. The method is applied to the imaging device, the imaging device comprises an imaging source and a bearing assembly, the bearing assembly is provided with a first marker, and a detection object carried by the bearing assembly is provided with a second marker. The method comprises the following steps: acquiring a preoperative three-dimensional image and an intraoperative perspective view of the detection object; the intraoperative perspective view comprises an image of the first marker and an image of the second marker; determining a target height according to the first marker and the second marker and the image of the first marker and the image of the second marker, the target height being a distance between the imaging source and the detection object; and determining a target registration image according to the preoperative three-dimensional image, the intraoperative perspective view and the target height. The image registration method provided by the application can be applied to various surgical scenes without acquiring an intraoperative three-dimensional image for registration, and has higher practicability.

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.

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 invention concerns a device and a method, and an X-ray system comprising such a device, comprising a first contact element configured to engage with a first engagement element, a second contact element configured to engage with a second engagement element, a cam element which is movably provided, an actuator and a spring attached to the cam element, wherein the cam element is arranged between the actuator and the spring. The first contact element and the second contact element are configured for being movable by the cam element, wherein the first contact element and the second contact element are configured for being movable between a locking positon and an unlocking position, wherein in the locking position the first contact element engages with the first engagement element and the second contact element engages with the second engagement element; wherein in the unlocking position the first contact element is spaced apart from the first engagement element and the second contact element is spaced apart from the second engagement element,. The actuator is configured upon activation to rotate the cam element such that the cam element is configured to move the first and the second contact element from the locking position to the unlocking position.

This invention discloses a method and system for correcting X-ray intensity fluctuations under CT tube voltage fluctuations. The method includes: calculating the intensity ratio of X-rays after filtering under different tube voltage values ​​based on pre-scanning air data; establishing a mapping model of X-ray intensity ratio parameters based on the intensity ratio relationship; acquiring the feedback value of the tube voltage under the current exposure during patient scanning in real time; determining the corresponding X-ray intensity ratio parameter from the mapping model based on the tube voltage feedback value; correcting the incident original X-ray intensity of each channel based on the X-ray intensity ratio parameter; calculating the X-ray attenuation value of each channel passing through the scanned object, and reconstructing the image based on the attenuation value. During patient scanning, the corresponding ratio parameter can be dynamically retrieved, and the attenuation value can be calculated by the ratio of the corrected incident light intensity to the detected intensity. Combined with hardening effect correction and reconstruction algorithms, the accuracy and stability of image reconstruction are significantly improved.

The invention discloses an electronic circuit and a method for providing a high tube voltage for an X-ray tube, a method for operating an X-ray tube, an X-ray tube system and a medical imaging apparatus. The invention relates to an electronic circuit for providing a high tube voltage for an X-ray tube. The electronic circuit has: a first inverter unit configured to receive an input DC voltage and convert it into a first AC voltage according to a first manipulated variable; and a second inverter unit configured to convert the input DC voltage to a second AC voltage according to a second manipulated variable. The further circuit portion is configured to generate a high tube voltage as a function of the first AC voltage and the second AC voltage. The control device is configured to determine a controlled variable and to vary the first manipulated variable (10) and / or the second manipulated variable as a function of the controlled variable, and to determine the controlled variable as a function of the first alternating current and the second alternating current and / or the first direct current and the second direct current.

Provided is a radiography apparatus that can change a load due to a manual operation force of an arm. A radiography apparatus includes: an irradiation unit that emits radiation; an arm that can hold the irradiation unit and an image receiving unit in a facing posture; a first rotation mechanism that rotates the arm; and a friction mechanism that is switchable between a first state in which a frictional force is applied to the arm in a direction opposite to a direction in which the arm is rotated and a second state in which the frictional force applied to the arm is less than that in the first state.