681results about "Radiation generation arrangements" patented technology

A non-transitory computer readable medium (26) stores instructions executable by at least one electronic processor (20) to perform a method (100) of monitoring a component (10) of a medical device (1). The method includes retrieving information about a correction factor (40) applied during operation of the component from the medical device; deriving a wear metric indicative of wear of a portion of the component from the retrieved information about the correction factor applied during the operation of the component; estimating a time remaining until end-of-life (EOL) of the component; and outputting an alert (30) indicating estimated time remaining until EOL of the component.

The invention discloses a CT system bulb tube position calibration method and device, and relates to the technical field of CT system scanning, and the method comprises the steps: obtaining projection data of a shielding sheet projected on a detector when a rack rotates; calculating the projection gravity center of the shielding sheet window on the detector, and calculating the projection coordinate of the rotation center in the two-dimensional coordinate system of the detector through the projection gravity centers at different exposure angles; and establishing a conversion relation between a three-dimensional coordinate system of the shielding sheet and a two-dimensional coordinate system of the detector, solving a conversion relation parameter, namely a projection coordinate of a bulb tube focus in the two-dimensional coordinate system of the detector, through a corresponding relation between the size of the shielding sheet and projection data, and further solving a calibration amount for calibration. The model body is easy to manufacture, the calibration amount in the X direction and the calibration amount in the Z direction can be calculated at the same time through one-time scanning, the method is suitable for all rack-mounted CT systems, the limitation that the calibration process is tedious and multiple times of adjustment are needed is avoided, actual operation is easy to achieve, and cost is low.

The embodiment of the invention provides an offset scanning offset determination method and device, equipment and a storage medium, and belongs to the technical field of offset scanning. Electronic equipment can obtain projection data obtained by performing offset scanning on a target object; based on the pixel value difference of the projection data pair in each column in the projection data, determining the predicted position of the rotation center shaft mapped in the detector; determining the offset range of the detector according to the pixel value difference of the projection data pair in the preset range; according to the pixel value fluctuation condition of the reconstructed image, the offset of offset scanning is determined, the preset range is a preset number of column data including the predicted position in the projection data, and the reconstructed image is obtained by reconstructing the projection data based on the offset. Due to the fact that the projection data are directly analyzed and processed, the accurate offset amount of offset scanning is determined, a correction die body does not need to be used, the process of determining the offset amount of offset scanning can be simplified, and the efficiency of determining the offset amount of offset scanning can be improved.

Method and apparatus for predicting maintenance and failure of X-ray tubes are disclosed. X-ray radiation signals are received directly from one or more X-ray detectors without being attenuated by an object or subject under examination. The unattenuated X-ray radiation signals and scan metadata data are stored in memory, and time domain analysis and frequency domain analysis is performed on the stored X-ray radiation signals. Amplitude and frequency data for all peaks greater than a predetermined Signal to Noise Ratio (SNR) from a spectrum derived from the frequency analysis are stored. Components of an X-ray tube are monitored according to the stored amplitude and frequency data. The stored amplitude and frequency data for all peaks greater than the predetermined SNR may be written to a data file for further analysis.

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.

The invention relates to the technical field of medical imaging, and discloses an image acquisition method and device for C-arm X-ray equipment and the C-arm X-ray equipment, and the image acquisition method comprises the steps: determining a target direction in which a scanning view needs to be enlarged under a target rack position according to a to-be-scanned area; based on the target direction, the contour of the to-be-scanned area and the scanning view field of the rack, determining a target motion track of the rack; wherein under the target movement track, the scanning view field of the rack covers the to-be-scanned area; and performing exposure acquisition according to the target movement track to obtain acquisition data. The exposure acquisition is carried out according to the target motion trail, so that the scanning visual field range can be enlarged, acquisition data of a larger scanning area can be obtained in the image acquisition process, a more accurate three-dimensional reconstruction result can be provided, the reconstructed image is more real and detailed, and the complete scanning image of the organ part can be obtained.

The invention relates to the technical field of computed tomography, in particular to a CT imaging system and method based on a distributed micro-focus X-ray source, and the system comprises the distributed X-ray source provided with a plurality of micro-focuses, a detector, a scanning carrier, a control module and a data processing module. In the scanning process, the distributed X-ray source and the detector rotate around the rotation center relative to the object to be detected at the same time, the multiple small and micro focuses are sequentially subjected to beam outgoing according to the beam outgoing strategy so as to disperse heat dissipation, the peak power of the small and micro focus radiation source can be effectively improved, and the time needed by single CT scanning is shortened. Besides, by designing a beam outgoing strategy of the distributed X-ray source, sampling distribution of a plurality of small microfocuses can be optimized, sub-pixel-level image reconstruction is realized, and the spatial resolution is further improved. According to the system and the method, ultrafast high-definition CT imaging can be realized, and the problem that a traditional single-focus X-ray CT system is difficult to consider high spatial resolution and high time resolution at the same time is solved.

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.

Versatile, multimode radiographic systems and methods utilize portable energy emitters and radiation-tracking detectors. The x-ray emitter may include a digital camera and, optionally, a thermal imaging camera to provide for fluoroscopic, digital, and infrared thermal imagery of a patient for the purpose of aiding diagnostic, surgical, and non-surgical interventions. The emitter may cooperative with an inventive x-ray capture stage that automatically pivots, orients and aligns itself with the emitter to maximize exposure quality and safety. The combined system uses less power, corrects for any skew or perspective in the emission, allows the subject to remain in place, and allows the surgeon's workflow to continue uninterrupted.

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.

Interstitial brachytherapy is a cancer treatment in which radioactive material is placed closely to the target tissue of the affected site using an afterloader (HDR-brachytherapy) or manually (LDR- and PDR-brachytherapy). For HDR-brachytherapy, the accuracy of this placement is calibrated using an external reference system that locates the radioactive material according to the radiation levels measured at locations around the source. At each of these locations, a scintillator produces light when irradiated by the radioactive material. This light is proportional to the level of radiation at each location. The light produced by each scintillator is converted to an electrical signal that is proportional to the light and the radiation level at each location. The radioactive material is located according to the plurality of electrical signals.

The present disclosure belongs to the technical field of X-ray imaging, and particularly relates to a mobile three-dimensional (3D) imaging machine based on an X-ray, and a 3D imaging data acquisition method. The mobile 3D imaging machine based on an X-ray includes a machine body, and a limiting mechanism, an exposure imaging mechanism and a position parameter extraction mechanism which are mounted on the machine body. A relative position between the exposure imaging mechanism and an object to be detected is limited by arranging the limiting mechanism on the machine body, so that the exposure imaging mechanism is able to reach each preset relative position in sequence for exposure imaging, and then, relative position data corresponding to projection data is extracted through the position parameter extraction mechanism.

The present invention relates to an X-ray analysis apparatus and a method of X-ray analysis. The X-ray analysis apparatus enables a user to carry out a plurality of X-ray analysis applications, for analysing a sample by measuring X-ray diffraction and / or X-ray fluorescence, using the same X-ray source. The apparatus comprises an X-ray source for irradiating the sample with X-rays, the X-ray source comprising a solid anode and a cathode for emitting an electron beam. It also comprises a focusing arrangement for focusing the electron beam onto the anode, and a controller. The controller is configured to receive X-ray analysis application information and to control the X-ray analysis apparatus to selectively operate in either a first X-ray analysis mode or a second X-ray analysis mode based on the X-ray analysis application information. In the first X-ray analysis mode the X-ray source operates at a first operating power and has an effective focal spot size that is less than 100 μm. In the second X-ray analysis mode the X-ray source operates at a second operating power that is higher than the first operating power, and the area of the effective focal spot is larger than the area of the effective focal spot in the first X-ray analysis mode.

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 a load balancing method of an X-ray tube and a load-balanced X-ray system.The load balancing method of the X-ray tube comprises the steps that cathode high voltage and anode high voltage which are related in polarity are provided for the X-ray tube, and a winding of a first transformer and a winding of a second transformer of a high-voltage generator are adjusted based on a target voltage difference value to be output; therefore, the difference value between the leakage inductance of the first transformer and the leakage inductance of the second transformer is changed to reach a target leakage inductance difference value, and the adjusted leakage inductance of the first transformer and the adjusted leakage inductance of the second transformer carry out corresponding voltage division on an anode high-voltage output loop and a cathode high-voltage output loop respectively. Therefore, the voltage difference value of the target anode high voltage and the target cathode high voltage of the adjusted X-ray tube reaches the target voltage difference value, the purpose of balancing the output voltage is achieved, an additional inverter circuit structure does not need to be added, the structures of the high voltage generator and the X-ray system are simplified, the design cost is reduced, and the method is suitable for large-scale popularization and application. And the system reliability is improved.

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 radiation imaging apparatus including a sensor panel including a first surface provided with a pixel array and an electrical connector and a second surface, and a base configured to support the second surface through first and second members, is provided. In an orthogonal projection to the first surface, the electrical connector is provided between a region provided with the first member provided to overlap the pixel array and an outer edge of the panel and the second member is provided to overlap the electrical connector. The second member is fixed to at least one of the second surface, the base, and the first member, and a passage extending from the first member to the outer edge is provided between the second surface and the base not to overlap the second member in an orthogonal projection to the first surface.

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.