476results 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.

There is provided a method (100) for projection-based spectral X-ray imaging, the method comprising: performing (110) projection-based material decomposition based on spectral X-ray data to generate a set of material-based sinograms, and performing (120) a weighted combination of at least a portion of at least two of the set of material-based sinograms based on the material weighting in the projection domain to obtain a reconstructed image.

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.

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.

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 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.

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.

A tube voltage control circuitry switches a tube voltage applied to an X-ray tube between a first tube voltage and a second tube voltage of lower value than the first tube voltage. A first signal generating circuitry generates a first switching signal at a first time interval. A view switching circuitry switches a view based on the first switch signal. A data acquisition circuitry performs data acquisition for each view via an X-ray detector. A second signal generating circuitry generates a second switch signal at a second time interval shorter than the first time interval. A gain switching circuitry switches gains of the data acquisition circuitry based on the second switch signal.

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.

To provide a dental X-ray imaging system for a computed tomography (CT) dental X-ray imaging of an object.SOLUTION: The system comprises: a dental X-ray imaging unit comprising an X-ray source part, an X-ray imaging detector part and a gantry part; and a control system. The control system is configured to: receive a scan request comprising an indication of a region of interest (ROI); control the dental X-ray imaging unit to acquire two X-ray scout images of the object; detect a target structure of the object from the two X-ray scout images associated with the ROI by applying a trained detection model for the X-ray scout images; define field-of-view data of the dental X-ray imaging unit at least partially based on the detected target structure; and control the parts of the dental X-ray imaging unit to implement the defined FOV data for a CT scan of the object in order to acquire dental CT X-ray image data of the object.SELECTED DRAWING: Figure 1

Proposed is a C-arm X-ray imaging apparatus that has a limited footprint to be able to operate and be moved in a narrow space such as an operating room and a treatment / procedure room. The X-ray imaging apparatus includes a C-arm part including a C-shaped arm, and an X-ray generator and an X-ray detector disposed oppositely at both ends of the C-shaped arm, a main body part including a movable mobile base, and an arm part configured to connect the main body part and the C-arm part, wherein the X-ray generator is separately movable with respect to an end of the C-shaped arm, and a footprint of the mobile base is less than 1 m2.

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.

A system and method for projection based spectral X-ray imaging, such as computed tomography (CT) imaging, the system and method comprising performing projection based material decomposition based on spectral X-ray data to generate a set of material basis sinograms, and performing a weighted combination of at least part of at least two material basis sinograms of the set of material basis sinograms into a reconstructed image based on material weighting in the projection domain.

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).

The invention relates to a module carrier for a CT detector module, wherein the module carrier has a one-piece and tunnel-shaped hollow body, wherein the hollow body has an elongated cavity and at least two openings, wherein two openings of the at least two openings are arranged opposite one another along a longitudinal direction of the hollow body, wherein the hollow body is designed to: - to be arranged on its outside on an X-ray converter element, - to accommodate at least one cooling element by inserting it through at least one of the at least two openings in its cavity, - to be flowed through by a fluid along its longitudinal direction, wherein the hollow body has a heat transfer section which is designed to provide a heat-conducting contact between the cooling element and the X-ray converter element. The invention further relates to a CT detector module and a CT device.

The invention relates to the technical field of medical equipment, in particular to medical X-ray imaging equipment and a solid sealing and filling device thereof.The medical X-ray imaging equipment comprises a shell, an X-ray tube is fixedly installed in the shell, an anode target assembly and a cathode assembly are installed at the two ends of the X-ray tube respectively, and a ceramic tube is connected between the anode target assembly and the cathode assembly; the anode target assembly comprises a target material and a transmission window, the cathode assembly comprises a filament assembly, the filament assembly emits electrons to the target material in a vacuum environment, and X-rays are generated through the transmission window; a collimator and a baffle plate are fixedly mounted at the two ends of the shell corresponding to the anode target assembly and the cathode assembly respectively, a beam outlet corresponding to the transmission window is formed in the center of the collimator, and the beam outlet limits the electron radiation range. The X-ray imaging equipment is small in size, wide in application range, good in insulation effect, high in service environment tolerance, capable of bearing high voltage and excellent in radiation shielding performance.

Systems are provided for a medical imaging system. In one example, the medical imaging system includes a C-arc with a radiation source coupled to a first end and a detector coupled to a second end of the C-arc, opposite to the radiation source, where the detector is configured to receive radiation from the radiation source The medical imaging system further includes a pivot arm configured to adjust a position of the C-arc and a cable chain coupled to each of the C-arc and the pivot arm via rotatable joints wherein the cable chain extends upwardly from each of the rotatable joints at each of a plurality of positions of the C-arc.

Disclosed is a portable three-dimensional DR system, relates to the technical field of three-dimensional DR. The portable three-dimensional DR system includes a support mechanism, an X-ray generator, a stand and a flat panel detector. The support mechanism includes a support tube, a transmission component, a drive component and a support pole slidingly provided in the support tube. The X-ray generator is detachably provided on the support pole, the transmission component is used for driving the X-ray generator to move in the direction of closing to or far from the support tube, the drive component is used for driving the X-ray generator to rotate, the flat panel detector is provided on the stand, and the stand is placed on a horizontal plane.

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.