245results about "Radiation diagnostics testing/calibration" patented technology

The present disclosure provides systems and methods for automated scan preparation and real-time monitoring / adjustment in medical imaging. The automated scan preparation may include positioning a target subject to be scanned by a medical imaging device, determining a rotation scheme of the medical imaging device, targeting a scan region of the target subject with an imaging isocenter of the medical imaging device, determining target position(s) of component(s) of the medical imaging device, performing a virtual scan, generating a reference subject model representing an internal structure of the target subject, or the like. The real-time monitoring / adjustment operations may include achieving automatic brightness stabilization, monitoring a posture of the target subject, adjusting the position of component(s) of the medical imaging device, estimating a dose distribution, monitoring a treatment of the target subject, performing a motion correction, or the like.

The embodiment of the invention discloses a flat panel detector positioning method, device, system and equipment and a medium, and the method comprises the steps: obtaining an image, collected by an image collection device, of a flat panel detector, and determining the pixel coordinates of a feature mark and a feature point in the image through a positioning model; determining first position attitude information and confidence coefficient according to the pixel coordinates, the internal reference matrix and the physical coordinates of the feature points; according to the confidence coefficient and a preset threshold value, the first position and attitude information is determined to serve as positioning information, or the second position and attitude information is determined to serve as the positioning information, and the second position and attitude information is determined according to the motion state information obtained by the inertial sensor. According to the technical scheme of the embodiment of the invention, the problems of large size and high cost of the flat panel detector positioned by the existing magnetic positioning device are solved, the positioning cost of the flat panel detector can be reduced and the positioning reliability and portability can be improved by combining the positioning mode of visual detection and the inertial sensor, and the method can adapt to different scenes.

The invention relates to a method for controlling the temperature of an X-ray device, comprising: - Acquiring planning information comprising at least one operating parameter of at least one component of the X-ray device for a planned operation of the X-ray device, - identifying a planning temperature of the at least one component of the X-ray device based on the at least one operating parameter, - Operating the X-ray machine according to the planning information, wherein a temperature control unit of the X-ray device is controlled before and / or during operation of the X-ray device based on the planning temperature such that the temperature control unit tempers the at least one component of the X-ray device to a predefined temperature or a predefined temperature range by providing a heating and / or cooling power. The invention further relates to an X-ray device and a computer program product.

The invention relates to a system and method for determining a health metric for an imaging system. The method is a computer-implemented method comprising: receiving (110) sensor data acquired during a diagnostic sequence comprising a plurality of diagnostic intervals, where a different set of subsystems of the imaging system (60) is active during each of the diagnostic intervals, and where the sensor data is acquired during the diagnostic sequence; a respective subset of sensor data is acquired during each of the diagnostic intervals. The method further comprises analyzing (120) the subsets of sensor data, and determining a health metric based on a combination of the subsets of sensor data acquired during different diagnostic intervals by performing mathematical operations between at least two subsets of sensor data acquired during mutually different diagnostic intervals. The method may include determining (130) a state of health of the imaging system based on the health metric.

Provided are an X-ray imaging device comprising a camera and a method for operating same. The X-ray imaging device may input an image obtained by using a camera to an artificial intelligence model, thereby recognizing and tracking a portable X-ray detector from the image, and may perform an operation according to an auto tracking function of the portable X-ray detector for automatically moving the position of an X-ray tube such that the focal spot of an X-ray irradiation region is aligned on the central region of the portable X-ray detector.

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.

To provide an X-ray CT apparatus capable of suppressing deterioration in the quality of a tomographic image due to X-ray attenuation in a headrest and a top plate.SOLUTION: An X-ray CT apparatus includes: an X-ray source for irradiating a subject with an X-ray; an X-ray detector for detecting an X-ray transmitting the subject; a rotation plate for rotating the X-ray source and the X-ray detector around the subject; an image generation part for generating a tomographic image of the subject on the basis of a detection signal of the X-ray detector; and a control part for controlling each part. The control part changes an irradiation condition of the X-ray radiated from the X-ray source while the rotation plate rotates so as to increase a radiation quantity from the side where a headrest and a top plate are arranged in the range of a projection angle that the X-ray passes through the headrest and the top plate.SELECTED DRAWING: Figure 3

To correctly align a plurality of medical images acquired by a plurality of medical diagnostic apparatuses.SOLUTION: A medical image diagnostic apparatus according to an embodiment comprises: a first medical image diagnostic device which captures a first medical image; a second medical image diagnostic device which captures a second medical image; a marker part; a sensor part; and a calibration part. The marker part is provided in at least one of the first medical image diagnostic device and the second medical image diagnostic device and includes at least one marker. The sensor part is provided in the other of the first medical image diagnostic device and the second medical image diagnostic device and includes at least one sensor for detecting the marker part. The calibration part calibrates position information between the first medical image and the second medical image on the basis of a physical relation between the marker part and the sensor part.SELECTED DRAWING: Figure 3A

The embodiment of the invention provides a PET / CT (positron emission tomography / computed tomography) equipment quality control system, which is used for correcting PET / CT equipment and comprises a correction solution preparation module, the correction solution preparation module comprises an automatic liquid suction and injection device, a uniform mixing device, a bubble remover and a plurality of correction die bodies, the automatic liquid suction and injection device is used for sucking a correction solution and injecting the correction solution into the uniform mixing device, and the automatic liquid suction and injection device is used for sucking the correction solution and injecting the correction solution into the uniform mixing device; the uniform mixing device is used for uniformly mixing the correction solution, the uniformly mixed correction solution flows into the bubble eliminator, the bubble eliminator is used for eliminating bubbles in the correction solution, and the correction solution after the bubbles are eliminated enters a plurality of correction mold bodies; and the plurality of robots are used for conveying the plurality of correction die bodies to designated positions of PET / CT equipment. Full-process operation such as automatic nuclide injection, solution mixing, bubble elimination, solution conveying, correction data acquisition and equipment running state feedback can be realized, and harm of radionuclides to human bodies in the quality control process is avoided.

[Problem] To provide a technology that allows a surgeon and / or subject body to visually recognize the level of exposure to scattered radiation. [Resolution means] A CT system 100, including: a gantry 102 including an X-ray tube 104; a table 116; and one or more processors, wherein the one or more processors execute operations including: identifying the position and shape of a surgeon 101 in a scan room 122 where the gantry 102 and table 116 are installed; identifying, based on the position and shape of the surgeon 101, a scattered radiation distribution 11 in a region of the scan room 122 in which the surgeon 101 is present from a three-dimensional scattered radiation distribution A30 that three-dimensionally expresses the distribution of scattered radiation generated by scanning the subject body 122; and displaying the scattered radiation distribution 11 by projecting the scattered radiation distribution 11 onto the surgeon 101.

The radiation imaging apparatus of the present disclosure includes an image output unit that outputs a first radiation image included in a series of radiation images acquired by radiation imaging of a subject, an image brightness information extraction unit that acquires brightness information from the first radiation image, a first irradiation condition calculation unit that determines a first irradiation condition based on the brightness information, an irradiation control unit that controls the dose of radiation based on the first irradiation condition, a second irradiation condition calculation unit that determines a second irradiation condition based on a second radiation image generated based on the first irradiation condition when the imaging site of the subject is fixed, and a dose reduction unit that reduces or maintains the dose of radiation based on the second irradiation condition.

The application provides a three-dimensionally heterogeneous PET system comprising at least two heterogeneous detector modules, each comprising at least two kinds of crystal strips closely arranged to form different detection performances levels for different kinds of crystal strips and same detection performances levels for same kind of crystal strips. Parameters of detection performances of crystal strips comprise energy resolution, density, size and light output, wherein different detection performances levels for crystal strips comprise one or more of parameters of detection performances of crystal strips being in different levels. Compared with a high spatial resolution PET system, the application effectively reduces manufacturing costs of a PET system without significantly reducing spatial resolution thereof. Compared with an ordinary spatial resolution PET system, it improves spatial resolution of a PET system by slightly increasing its cost, and can also provide imaging field of view with high spatial resolution in radial direction.

An X-ray diagnostic apparatus according to the embodiment includes an X-ray tube, an X-ray diaphragm assembly, an X-ray detector, and processing circuitry. The X-ray diaphragm assembly includes an X-ray diaphragm defining an irradiation field of X-rays emitted from the X-ray tube and has a characteristic object. The X-ray detector is configured to detect the X-rays emitted from the X-ray tube and passed through a subject. The processing circuitry is configured to calculate information indicating a relative positional relationship between the X-ray tube and the X-ray detector based on an image of the characteristic object depicted in an X-ray image being based on transmission data acquired by the X-ray detector.

The present specification provides a method and system for magnetic resonance imaging, the method comprising: acquiring at least two signals of a subject, the at least two signals being generated using a magnetic resonance imaging device, each of the at least two signals corresponding to a set of values ​​in at least two signal dimensions, the at least two signal dimensions being signal dimensions for signal acquisition using the magnetic resonance imaging device; determining a main signal dimension associated with the signal representation of the subject in the at least two signal dimensions; determining a first value and a second value associated with the signal representation of the subject based on the at least two signals, wherein the first value represents the signal representation along a first direction of the main signal dimension, the second value represents the signal representation along a second direction of the main signal dimension, and the first direction is opposite to the second direction; and determining a quantitative parameter value of the subject based on the first value and the second value.

The invention relates to a device for conducting an examination of an object using X-ray radiation, - wherein the device comprises a functional element arranged in the radiation area so as to be movable in one direction of movement, which has an electrically and / or magnetically conductive area, and a position sensor, - wherein the position sensor has an electrical coil arrangement for detecting the conductive area and for providing a total voltage depending on the detection of the conductive area, - wherein the coil arrangement comprises an excitation coil for providing an alternating magnetic field and two detection coils connected in series for detecting at least a part of the alternating magnetic field, wherein the detection coils and the excitation coil are arranged such that the sum voltage across the two detection coils depends on a position of the functional element relative to the position sensor, - wherein the device is configured to determine a position signal relating to the position of the functional element relative to the position sensor, depending on the total voltage.

The invention discloses a non-radiative C-arm geometric calibration method and system, and aims to realize non-radiative automatic calibration of geometric parameters of a C-arm system by introducing an external sensor. According to the method, on the premise that an X-ray source is not started, space pose estimation and geometric relation solving of equipment can be completed, and therefore the safe, rapid and repeatable calibration process is achieved. Meanwhile, real-time updating and dynamic compensation of calibration parameters can be achieved, the method is particularly suitable for scenes such as intra-operative navigation, intelligent robot guiding and C-arm pose tracking, and the clinical usability and precision stability of the system are remarkably improved.

An operating method of an apparatus according to an embodiment of the present disclosure may comprise the steps of: measuring a reference irradiation field for an effective reception surface; measuring a first irradiation field as X-rays are irradiated, after the positions of two collimators are moved toward the center of the reference irradiation field by a first distance from a reference position of the reference irradiation field; measuring a second irradiation field as the X-rays are irradiated, after the positions of the two collimators are moved toward the center of the reference irradiation field by a second distance from the reference position of the reference irradiation field, the second distance being greater than the first distance; and determining whether the difference between the second distance and the first distance matches the difference between the first irradiation field and the second irradiation field.

The invention relates to a device for performing an examination of an object by means of X-ray radiation, wherein the device has a functional element which is movably arranged in a radiation region in a movement direction and a position sensor, the functional element having an electrically and / or magnetically conductive region, wherein the position sensor is an electric coil assembly for detecting the conductive region and for providing an overall voltage depending on the detection of the conductive region, wherein the coil assembly has an excitation coil for providing an alternating magnetic field and two series-connected detection coils for detecting at least a portion of the alternating magnetic field, wherein the detection coils and the excitation coil are arranged such that the overall voltage over the two detection coils is dependent on the position of the functional element relative to the position sensor, wherein the device is configured to derive a position signal dependent on the position of the functional element relative to the position sensor from the overall voltage.

Methods, systems, and computer readable media are provided for reduced dose angiography using machine learning (e.g., deep learning) using consistency metrics, the consistency metric indicates a degree of similarity between an estimated segmentation of the angiographic image generated by the machine learning model and a reference angiographic image provided as input to the segmentation of the machine learning model. Briefly, the techniques described herein may use a neural network trained to preserve / maintain the quality of angiographic images by employing consistency metrics while reducing the dose of angiography of potentially harmful chemical contrast agents and / or X-ray radiation.

The application relates to a subject vertical positioning method, a subject vertical positioning device and a CT system. The method comprises the following steps: acquiring the position of an examination bed after the subject is positioned; determining a measurement range corresponding to the organ of the subject on the examination bed, the measurement range comprising a starting point and an ending point in the horizontal direction; during the movement of the examination bed towards a scanning frame, starting the measurement of the distance from the subject by a sensor attached to the scanning frame when the starting point reaches a measurement position of the sensor, and stopping the measurement when the ending point reaches the measurement position, and acquiring the height of the examination bed while the sensor is measuring; calculating the organ center height based on the measurement result of the sensor, the height of the sensor and the height of the examination bed, the height representing the average height of the organ in the vertical direction; and adjusting the height of the examination bed based on the organ center height, so that the adjusted organ center height is equal to the isocenter height of the scanning frame, so as to realize the effects of minimizing the radiation dose of the subject and improving the CT imaging quality.

The invention discloses a device and a method for detecting obstacles of a movable examination bed and medical imaging equipment. The device comprises a first camera shooting unit which shoots a first reference image when the bed board is located at the first position and a first image before the bed board advances; a second image capturing unit that captures a second reference image when the bed plate is located at the second position and a second image before travel; the judging unit is used for pre-judging whether the bed jamming or collision possibility exists in the travel of the bed board or not according to the advancing direction and travel of the bed board, the position of the bed board when the first image or the second image is shot, the first reference image, the first image, the second reference image and the second image; and the prompting unit is used for giving out a prompt when the judgment unit judges that the bed jamming or collision possibility exists.

The application provides a method and device for monitoring the dose of an X-ray machine, the method comprising: obtaining a functional relationship between the dose rate of the X-ray machine at a preset detection position and the exposure parameter of the X-ray machine when the X-ray machine operates at a preset frame rate; calculating the dose rate at a target detection position when the X-ray machine operates at a target frame rate and a target exposure parameter according to the functional relationship, the distance between the preset detection position and the target detection position relative to the focal point of the X-ray machine tube; calculating the cumulative dose of the X-ray machine at the target detection position according to the dose rate and the exposure time of the X-ray machine; and calculating the cumulative dose-area product of the X-ray machine according to the cumulative dose and the field area of the X-ray machine at the target detection position. The method and device for monitoring the dose of the X-ray machine can realize accurate measurement of the dose rate, cumulative dose and cumulative dose-area product of the X-ray machine through software, can balance low cost and high accuracy dose monitoring, and has a wide range of applications.

The invention relates to the technical field of medical images, in particular to a medical image processing auxiliary device and method, and the method comprises the steps: S1, height adjustment: adjusting the height of an examination plate according to the height of a patient; s2, fixing elbows: placing the elbows of the patient in a fixing box and fixing the elbows; s3, adjusting the body position: controlling a first electric control cylinder to drive a fixing box to move towards one side close to the examination plate by a control module, identifying the distance between a connecting block and the examination plate through a laser ranging unit, and further controlling the moving distance of the fixing box; s4, illumination imaging: after the thoracic cavity is attached to the examination plate, illumination imaging is carried out; and S5, image processing: converting the information acquired by the image acquisition module into a clear image, displaying the image on a man-machine interaction screen in real time, and transmitting the image to a data storage and communication module for storage and synchronization after the preview image is confirmed to be correct. The elbow of the patient is attached to the examination plate, so that the thoracic cavity of the patient is attached to the examination plate, and image artifacts are avoided.

The invention discloses a health management and control method based on medical equipment, and relates to the field of medical equipment, and the method comprises the steps: collecting running state parameters of a CT scanner in real time, creating a cloud database, and storing the collected running state parameters of the CT scanner based on the cloud database; position sensors are deployed on moving parts of the CT scanner, in the running process of the CT scanner, the position sensors are controlled to run synchronously, position information is sensed in real time, and the motion trails of the moving parts on the CT scanner are constructed based on the sensed position information; according to the method, the running state parameters of the CT scanner are collected in real time and stored in the cloud database, the position sensor is combined to construct the motion trail of the motion part, the running state health of the CT scanner is comprehensively evaluated from the two dimensions of the running state parameters and the motion trail, and whether equipment is healthy or not can be accurately judged. And the running state parameters are marked with timestamps before being stored, and data are updated after each time of maintenance, so that tracing and management are facilitated.

A dynamic imaging quality control device that performs quality control regarding dynamic imaging in which a dynamic state of a subject is captured by sequentially emitting radiation to the subject, the dynamic imaging quality control device including: an obtainer that obtains dynamic image data including multiple pieces of frame image data obtained by the dynamic imaging; and a hardware processor that: generates information on quality control regarding smoothness of a dynamic image based on a movement distance of a predetermined object of the subject in the dynamic image data, and outputs the information on the quality control regarding the smoothness of the dynamic image.

Systems and methods for analyzing images. The methods comprise using an imaging device to acquire a pre-shot image of a target anatomical area of an individual; analyzing the pre-shot image to assess image quality of one or more regions within the pre-shot image; and determining acquisition parameters for a full-dose image from the one or more measures of image quality. The methods also include acquiring, by the imaging device, a full-dose image using the acquisition parameters determined during analysis of the pre-shot image; and generating a final image from the full-dose image.

An information processing apparatus includes a display controller that continuously acquires image information obtained by optically capturing a subject in a decubitus state on a bed while performing control to display a first line in a case where a difference between a position of the first line corresponding to a position of a predetermined part of the subject in an image indicated by the image information at a current point in time and a position of a second line corresponding to a position of the above-described predetermined part of the subject in an image indicated by the image information in a most recent past exceeds a predetermined threshold value.

One or more example embodiments relates to a computer-implemented method for dose control with an automatic exposure control. The method comprises receiving a first time-course, receiving a second time-course, and receiving a cut-off dose. The method comprises determining a first weight, determining a second weight, multiplying a latest value of the first time-course with the first weight, wherein a first weighted accumulated dose is determined and multiplying a latest value of the second time-course with the second weight, wherein a second weighted accumulated dose is determined. The method comprises adding the first and the second weighted accumulated dose, wherein a weighted overall applied dose is determined, comparing the weighted overall applied dose with the cut-off dose, and providing a result of the comparison.

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