196results about "Radiation generation arrangements" patented technology

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.

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.

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.

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 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 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 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.

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.

This application relates to an X-ray imaging method, preferably a CT-X-ray imaging method, for generating image data of an examination area of ​​an object to be examined. In this method, first X-ray projection measurement data is acquired from the examination area using a first X-ray energy spectrum, and at least second X-ray projection measurement data is acquired using a second X-ray energy spectrum, the second X-ray energy spectrum being different from the first X-ray energy spectrum. Furthermore, prior image data is reconstructed based at least on the first X-ray projection measurement data, and the location-related distribution of X-ray attenuation values ​​in the examination area is determined. Basic material decomposition is performed based on the first X-ray projection measurement data and at least the second X-ray projection measurement data. The location-related weights of the basic materials are determined according to the location-related distribution of the X-ray attenuation values. Finally, a complete image of the examination area is obtained by reconstructing location-related, virtual, and basic material-weighted image data.

The present invention relates to a tomosynthesis system capable of obtaining high-resolution 3D images, wherein three-dimensional images can be obtained by imaging a subject from different positions and / or angles of a plurality of X-ray sources without mechanical movement of X-ray equipment. The tomosynthesis system comprises: an X-ray source unit including a plurality of X-ray sources; a movement unit connected to the X-ray source unit to move the X-ray source unit; angle adjustment units respectively connected to the X-ray sources of the X-ray source unit to adjust irradiation angles of the X-ray sources; and a fixing frame that fixes the angle adjustment units.

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.

An x-ray imaging apparatus 10 comprising a support 30 having two arms, wherein on one arm an x-ray emitter 50 is arranged, and on the other arm a flat panel digital detector 60 is arranged, the emitter and detector arranged opposite each other providing a space therebetween for the positioning of an object for x-ray imaging by the apparatus, the x-ray emitter comprising an array of emitters, the apparatus arranged such that in use different emitters are energisable independently from one another such that 3-dimensional tomosynthesis images are obtainable of the object, with the object, emitter and detector maintained stationary relative to one another.

To switch gains related to data collection in synchronization with switching of tube voltages.SOLUTION: An X-ray computed tomography apparatus according to an embodiment includes a tube voltage control part, a first signal generation part, a view switching part, a data collection part, a second signal generation part, and a gain switching part. The tube voltage control part switches tube voltages applied to an X-ray tube between a first tube voltage and a second tube voltage lower than the first tube voltage. The first signal generation part generates a first switch signal at a first time interval. The view switching part switches views on the basis of the first switch signal. The data collection part executes data collection by the view through an X-ray detector. The second signal generation part generates a second switch signal at a second time interval shorter than the first time interval. The gain switching part switches the gains of the data collection part on the basis of the second switch signal.SELECTED DRAWING: Figure 5

The invention relates to a computer-implemented method of determining tube current during X-ray kVp switching. The method comprises generating (110) a calibration tube voltage pulse in a calibration phase, wherein the calibration tube voltage pulse comprises a first kVp plateau and a second kVp plateau different from the first kVp plateau; measuring (120) a first tube current at the first kVp plateau and a second tube current at the second kVp plateau during the calibration tube voltage pulse; determining (130) a calibration factor from a ratio between the first tube current and the second tube current; measuring (140) a third tube current at steady state at the first kVp plateau in a kVp switching phase; and determining (150) a fourth tube current at the second kVp plateau in the kVp switching phase, wherein the fourth tube current is determined based on the calibration factor and the third tube current at the first kVp plateau. The invention further relates to a high voltage generator (30) configured to perform the computer-implemented method, a computer program element and a computer readable medium, and an X-ray system.

The invention relates to a system and method for an X-ray tube. Methods and systems are provided for preventing thermal landing of a motor (321) of an X-ray imaging system (300) in the event of power loss. In one example, a method for an X-ray tube of an imaging system (300) includes supplying energy from a primary power source (602) to the X-ray tube (316) during scanning of a subject (204) using the imaging system (300) in order to rotate a target (319) of the X-ray tube (316); selectively recovering energy from the X-ray tube (316) and storing the recovered energy in a tank circuit (342) of the imaging system (300); and detecting a loss of the main power source (602) and, in response, supplying energy from the tank circuit (342) to the X-ray tube (316) in order to rotate the target (319) at a threshold speed.

This invention provides a control method for a spiral CT scanner, the method comprising: receiving vital sign data of a scanned object; formulating a first scan plan based on the vital sign data; performing a CT scan on the scanned object according to the first scan plan to obtain first projection data, the first projection data including projection data already acquired under the first scan plan and projection data to be acquired; performing an inspection using the first projection data according to image reconstruction inspection rules; evaluating the inspection results according to specific conditions, if the evaluation results meet the specific conditions, maintaining the first scan plan, if the evaluation results do not meet the specific conditions, generating a second scan plan and continuing to perform a CT scan on the scanned object according to the second scan plan, and obtaining second projection data, wherein the specific conditions are whether the first projection data is sufficient or redundant for image reconstruction; and performing image reconstruction based on the first projection data and / or the second projection data.

Provided is a mechanism for enabling a radiation generation apparatus to accurately perform control processing to stop irradiation of radiation. The mechanism includes a dose calculation unit that calculates a cumulative dose of radiation detected by a sensor unit from start of imaging, a timer unit that measures an irradiation time for radiation from a predetermined timing, a threshold decision unit that sets an irradiation stop threshold based on the irradiation time, a control unit including a threshold determination unit that transmits an irradiation stop signal to stop irradiation of radiation to the radiation generation apparatus when the cumulative dose reaches the irradiation stop threshold, and a sensor unit that detects radiation from the radiation generation apparatus. When the dose calculation unit calculates the cumulative dose having reached a predetermined amount from start of imaging, the threshold determination unit causes the timer unit to start measurement of the irradiation time.

This application disclosures a method for calibrating filament current data of an X-ray tube. The method includes obtaining a first value of tube current to be calibrated and a value of filament current to be calibrated, the tube current to be calibrated and the filament current to be calibrated corresponding to a first calibration point; performing an emission operation based on the first value of the tube current to be calibrated and the value of the filament current to be calibrated; determining an actual value of the tube current during the emission operation; determining a difference between the actual value of the tube current and the first value of the tube current to be calibrated; and calibrating, based on the difference, the first calibration point.

A radiation irradiation device includes: a device main body that irradiates a subject with radiation; a spacing ensuring unit that is a member extending from the device main body in an emission direction of the radiation to ensure a spacing between the subject and the device main body and is switchable between an unfolded state in which a length extending from the device main body is a predetermined length and a storage state in which a length from the device main body is shorter than the predetermined length with a displacement of at least a part of a movable portion; and a processor, in which the processor detects a state including the storage state and the unfolded state of the spacing ensuring unit, and executes a control of an operation of the device main body according to the detected state.

Methods and systems are provided for preventing hot landings of a motor (321) of an X-ray imaging system (300) in the event of a power loss. In an example, a method for an X-ray tube of an imaging system (300) includes, during a scan of a subject (204) with the imaging system (300), supplying energy from a main power supply (602) to the X-ray tube (316) in order to rotate a target (319) of the X-ray tube (316), selectively recovering energy from the X-ray tube (316) and storing the recovered energy in an energy storage circuit (342) of the imaging system (300), and detecting a loss of the main power supply (602), and in response, supplying energy from the energy storage circuit (342) to the X-ray tube (316) in order to rotate the target (319) at a threshold speed.

The application discloses a CT device and a control method and device thereof, and relates to the technical field of medical treatment. In the process of acquiring a positioning image of a scanning object, the CT device can acquire a plurality of first optical images through an image acquisition component, and acquire the Z-direction position of the scanning object when each first optical image is acquired. Then, in the formal scanning process, the CT device can acquire a target optical image corresponding to the Z-direction position closest to the Z-direction position corresponding to the second optical image from the plurality of first optical images based on the Z-direction position of the scanning object when the second optical image is acquired, and then automatically control the scanning process of the CT device based on the similarity between the second optical image and the target optical image. Since the reliability of determining the movement result of the scanning object based on the similarity between the second optical image and the target optical image is relatively high, the reliability of controlling the scanning process of the CT device based on the movement result can be ensured.

The exposure control method for X-ray imaging comprises S10 to S50. And S10, acquiring sampling data of the target electrical parameters of the bulb tube. And S20, obtaining an analysis value of the target electrical parameter according to the sampling data in the first-degree ignition monitoring period. S30, for the first-degree ignition monitoring period, whether the absolute deviation of the analysis value of the target electrical parameter relative to the preset value is larger than or equal to a first preset threshold value or not is judged. And if yes, controlling exposure according to a first control strategy. And S40, obtaining an analysis value of the target electrical parameter according to the sampling data in the second-degree ignition monitoring period. S50, for the second-degree ignition monitoring period, whether the absolute deviation of the analysis value of the target electrical parameter relative to the preset value is larger than or equal to a second preset threshold value or not is judged. And if yes, controlling exposure according to a second control strategy. The method can monitor ignition and control exposure, and is beneficial to protecting the bulb tube. In addition, the invention also provides an X-ray generator and an exposure control system.

The present application provides a kind of ray source mechanism, comprising: body, suitable for outputting ray;Pulling assembly, suitable for limiting the position of body relative to rack, and allow body to rotate around the first axis of pulling assembly between the closed position close to rack and the open position away from rack;And first support assembly, installed at the lower end of body, to support the lower end of body around the first axis smooth rotation relative to the first work surface located below the first support assembly;Wherein, a part of first support assembly has the disengagement state with the first work surface, and the contact state with the first work surface in the process that body is disengaged from closed position, to adjust the contact area of first support assembly and first work surface.The present application also provides a kind of computer tomography equipment, comprising rack, detector mechanism and ray source mechanism, and the ray source mechanism is configured to move between the closed position shielding detector mechanism and the open position opening detector mechanism.