307results about "Radiation diagnostics testing/calibration" patented technology

The invention relates to a multi-dimensional transformation device for debugging an SPECT detector, the multi-dimensional transformation device comprises a supporting unit, a rotating unit and a detector fixing unit, the supporting unit comprises a base and at least one vertical supporting column, and the supporting column is used for supporting the detector fixing unit; the rotating unit is connected between the top of the supporting column and the detector fixing unit and used for rotating the detector fixing unit. The detector fixing unit comprises a fixing frame, the detector is installed in the fixing frame, the detector can rotate along with the detector fixing unit, and multi-angle detector debugging is facilitated.

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.

An energy spectrum image processing method and apparatus, a device, and a storage medium. The method comprises: determining an initial substance base image (S110); determining a current iteration result corresponding to a current number of diffusion steps to obtain current noise data corresponding to the current iteration result, and on the basis of the current noise data, performing noise reduction processing on the current iteration result to update the current iteration result (S120); and taking an updated current iteration result as a target substance base image (S130).

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 provides a method for determining special pelvic acetabular cup prosthesis information based on mirror image reconstruction, which comprises the steps of CT equipment image performance detection, pelvic three-dimensional model reconstruction and special pelvic acetabular cup prosthesis information determination, and ensures the performance stability of CT equipment by acquiring and analyzing the operation data of the CT equipment. The method has the advantages that two-dimensional image blurring or distortion caused by poor performance of CT (computed tomography) equipment is avoided, high-quality pelvis two-dimensional images are acquired, the definition of the two-dimensional images can be guaranteed by analyzing and preprocessing the pelvis two-dimensional images, a reliable basis is provided for subsequent three-dimensional reconstruction and prosthesis information determination, and the method is suitable for popularization and application. According to the method, the accuracy and authenticity of the three-dimensional model are ensured, the accurate three-dimensional pelvis model is generated through three-dimensional reconstruction of the two-dimensional pelvis image, the structure and form of the pelvis can be displayed more visually, and a basis is provided for a subsequent special pelvis acetabular cup prosthesis information determination method.

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.

The invention discloses a head posture detection method, mobile CT equipment, electronic equipment and a storage medium, the head posture detection method is applied to the mobile CT equipment, a cavity of the mobile CT equipment comprises a camera, and the method comprises the following steps: acquiring a head image based on the camera, and carrying out nose area detection on the head image to obtain a nose area image; performing ellipse identification on the nose area image to obtain a plurality of ellipse areas; determining nose feature information based on the plurality of elliptical regions; and determining a head offset degree based on the nose feature information, and detecting a head posture based on the head offset degree. According to the head posture detection method, ellipse detection is carried out on the nose area, the nose feature information is extracted, head posture detection is achieved based on the nose feature information, the problem that a traditional head posture estimation method seriously depends on complete face key points is solved, and the method is simpler and more efficient.

Methods, systems, and computer readable media are provided for reduced-dose angiography using machine learning (e.g., deep learning) with a concordance metric indicating a degree of similarity between an estimated segmentation of angiographic images generated by a machine learning model and segmented benchmark angiographic images provided as inputs to the machine learning model. Briefly, techniques described herein may use a neural network trained to conserve / preserve angiographic image quality while reducing the angiographic dose of potentially harmful chemical contrast and / or x-ray radiation by employing a concordance metric.

The invention discloses an energy spectrum image processing method and device, equipment and a storage medium. The method comprises the following steps: determining an initial substance-based image meeting an initial quantitative precision condition; in the process of executing target image iteration reconstruction on the initial substance-based image, determining a current iteration result corresponding to the current diffusion step number, and obtaining current noise data corresponding to the current iteration result based on a pre-trained diffusion noise model, performing noise reduction processing on the current iteration result based on the current noise data so as to update the current iteration result, the initial diffusion step number in the target image iteration reconstruction process being determined based on an inverse diffusion initial point, and the inverse diffusion initial point being determined based on a data acquisition condition corresponding to the initial substance-based image; and under the condition that the iterative reconstruction of the target image is finished, taking the updated current iterative result as a target substance-based image. According to the embodiment of the invention, the substance decomposition quantitative result of the energy spectrum image obtained under various data acquisition conditions can be ensured to have relatively high precision.

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 invention relates to a computer-implemented method (M1) for more accurately providing data of a load distribution (16) of a radiation (6) from a radiation source (4) of an imaging system (1), comprising the steps: - receiving setting data (10) of the imaging system (1); - receiving a radiation exposure characteristic (14) associated with the setting data (10); - receiving data of an intensity distribution (15) of the radiation (6) associated with the setting data (10) at a radiation detector (3) of the imaging system (1); - applying a trained first function (11) to the setting data (10), the load characteristic (14) and the intensity distribution data (15) as first input data of the trained first function (11), wherein the load distribution data (16) are generated as first output data of the trained first function (11); - Providing load distribution data (16). The invention further relates to a data processing device (2), a computer-implemented training method (M2), a computer program product (8) and an imaging system (1).

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.

A X-ray dose adjustment method for a medical imaging system may include: acquiring a first image which is captured by the medical imaging system and comprises a region to be examined; subjecting the first image to image segmentation on the basis of a grayscale value of the first image to acquire a first sub-region and a second sub-region, wherein a grayscale value of the first sub-region is greater than a grayscale value of the second sub-region; determining at least one of the first sub-region and the second sub-region to be a target region on the basis of a comparison of the grayscale value of the first sub-region with a first grayscale threshold; and performing dose adjustment on the basis of the target region.

A method 402 for lifetime testing radiotherapy equipment comprises outputting a set of instructions to a robot. The instructions define a series of one or more physical manipulations to be applied by

The invention relates to a dose calculation model modeling method, a radiation delivery device and a readable storage medium. The method comprises the following steps: acquiring a first dose calculation model and actual measurement verification data; determining whether the actually measured verification data meets verification data checking conditions or not; and if the actual measurement verification data meets the verification data checking condition, adjusting the first dose calculation model to obtain a second dose calculation model based on the actual measurement verification data. In the modeling method, two modeling processes of rapid modeling and accurate modeling are set, and actual measurement verification data used for verifying a first dose calculation model obtained by rapid modeling is checked in advance so as to ensure the accuracy of the actual measurement verification data; the problems that the accurate modeling process is interrupted due to errors of the actual measurement verification data, and the overall modeling time is long due to the fact that the actual measurement verification data needs to be obtained again are solved, so that the overall modeling time can be shortened, and the modeling efficiency is improved.

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.