97results about "Radiation diagnostic techniques" patented technology

Systems and methods are disclosed for evaluating a patient with vascular disease. One method includes receiving one or more vascular models associated with either the patient or with a plurality of individuals; receiving observed perfusion information associated with the patient; and estimating, using one or more computer processors, one or more blood flow characteristics or one or more pathological characteristics of the patient based on the observed perfusion information and the one or more vascular models.

A computer-implemented method of processing patient image data comprises: receiving a patient-specific vascular model of an individual, wherein the patient-specific vascular model is based at least in part on medical images acquired of the individual; receiving a patient-specific tissue model of a tissue of the individual; observing an actual perfusion value of the tissue; determining at least one vessel pathology that causes the actual perfusion value; and selecting a candidate updated vascular model of the plurality of candidate updated vascular models that results in a minimum difference between the hypothetical perfusion value and the actual perfusion value; updating the patient-specific vascular model to include the at least one vessel pathology of the selected candidate updated vascular model; and outputting an estimate of a location of the at least one vessel pathology or an estimate of a severity of the at least one vessel pathology.

The invention relates to a wide-view C-shaped arm X-ray machine and an imaging method thereof.The wide-view C-shaped arm X-ray machine comprises a main machine, a C-shaped arm, an X-ray source, a flat panel detector, a first telescopic mechanism, a first translation mechanism and a first swing mechanism, the first telescopic mechanism is arranged at one end of the C-shaped arm and used for driving the first translation mechanism and the flat panel detector to stretch out and draw back, and the first swing mechanism is arranged at the other end of the C-shaped arm and used for driving the X-ray source to swing. The first translation mechanism is arranged on the first telescopic mechanism and used for driving the flat panel detector to translate, and the first swinging mechanism is arranged at the other end of the C-shaped arm and used for driving the X-ray source to swing so as to follow the position of the flat panel detector, so that X-rays emitted by the X-ray source can fall on the flat panel detector. The flat panel detector can move to different imaging positions to obtain images at different positions, and the images are synthesized into a larger image, so that the area of an imaging region is greatly increased, the observation view of a doctor is expanded, and the efficiency and safety of an operation are improved.

The invention relates to the technical field of material detection equipment, in particular to an X-ray reciprocal space multi-scale imaging system which is characterized in that an X-ray collimation and grating integration device is used for modulating cone-beam X-rays to obtain fan-beam X-rays; the grating device is used for preliminarily modulating an X-ray small-angle scattering signal generated after the fan-beam X-ray irradiates the sample to be detected; the grating and coding hole integration device is provided with a third grating and a coding hole, and the third grating is used for modulating the preliminarily modulated X-ray small-angle scattering signal again to obtain a modulated X-ray small-angle scattering signal; the coding hole is used for modulating an X-ray diffraction signal generated after the fan-beam X-ray irradiates the sample to be detected to obtain a modulated X-ray diffraction signal; and the detector is used for receiving the modulated X-ray small-angle scattering signal and the X-ray diffraction signal. According to the invention, tomography of the to-be-detected sample can be realized integrally and automatically, and crystal structure and mesoscale information of internal voxels can be obtained efficiently.

An X-ray imaging apparatus is provided with an X-ray irradiation unit, an X-ray detection unit, a moving mechanism unit movable in a state of supporting the X-ray irradiation unit, an optical feature point acquisition unit, and a notification unit. The optical feature point acquisition unit is provided on either one of the X-ray irradiation unit and the X-ray detection unit and is configured to optically detect a feature point provided on the other of the X-ray irradiation unit and the X-ray detection unit to acquire the position of the feature point. The positional deviation acquisition unit acquires the positional deviation of the relative position between the X-ray irradiation unit and the X-ray detection unit based on the position of the feature point. The notification unit performs a notification based on the positional deviation.

The bone measurement system is configured to detect a density of a metallic source within a bone. The bone measurement system includes an x-ray fluorescence (XRF) device, a filter, a radiation detector, a non-transitory computer-readable storage medium storing processor-executable instructions, and a processor. The XRF device may have an x-ray tube including an x-ray source and an anode. The x-ray source may be configured to produce an x-ray beam. The x-ray tube may include a backscatter geometry of around less than one-hundred and eighty degrees to more than ninety degrees. The filter may be disposed along a path of the x-ray beam. The radiation detector may be coupled to the XRF device.

This invention discloses a positioning support device for a mammography machine in radiology, belonging to the field of medical device technology. The positioning support device includes a movable guide rail, a mounting base slidably connected to the movable guide rail, a standing plate rotatably connected to the mounting base, a back plate fixed to one side of the top of the standing plate, two sets of shoulder fixation components symmetrically and slidably connected to the back plate, and an adjustable lumbar support pad slidably connected to the back plate. The shoulder fixation components and the lumbar support pad move up and down synchronously. A seat plate is also movably connected to the back plate, and a hidden groove matching the seat plate is provided on the back plate, located below the shoulder fixation components. This positioning support device allows patients to have their shoulders fixed in a normal standing position for convenient examination, and also allows patients to undergo mammography in a seated position. The seat position is rotatable and movable, and patients can easily get in and out of the seat. Furthermore, this positioning support device also provides effective support for the patient's lower back.

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.

According to one aspect of an exemplary embodiment of the disclosure, a system and method for providing an indication of the mode of operation of an X-ray imaging system operable in a fixed mode or an automatic optimization of parameter (AOP) mode, and an operational mode indication system including at least one of a visual indicator and an audio indicator. The selection of an operational mode for the X-ray system enables a control processing unit to activate the operational mode indication system in a first manner and in a second manner at least during the operation of the radiation source and the detector to provide an indication of a current mode of operation of the imaging system, wherein the first manner is readily discernable from the second manner.

The application provides a metabolic abnormality detection method and device based on cross-modal generation, a terminal, a medium and a program product. The method comprises the following steps: based on the obtained head real 18F-FDG positron emission tomography image of a subject, a trained explicit cross-modal image conversion model is used to reconstruct a pseudo-normal 18F-FDG positron emission tomography image of the subject; according to the head real 18F-FDG positron emission tomography image and the reconstructed pseudo-normal 18F-FDG positron emission tomography image, a residual image is obtained by calculating the intensity difference between the two; and based on the residual image, a metabolic abnormality of the subject is detected by using a set abnormality evaluation index. The application uses the trained explicit cross-modal image conversion model to process the head 18F-FDG positron emission tomography image in three-dimensional space, obtains a residual image, and directly shows the metabolic abnormality mode of the brain of the subject, thereby assisting doctors to carry out efficient and accurate diagnosis work.

The invention discloses a CT (Computed Tomography) imaging method with constant image quality, which relates to the technical field of medical CT imaging and comprises the following steps of: 1, preparing a data set which comprises high-dose CT projections or images of a large number of patients and corresponding patient prior information; 2, constructing models including a dose estimation model, a scanning simulation model and an image reconstruction model; 3, training the model constructed in the step 2; 4, acquiring prior information of the patient; 5, obtaining the optimal examination dose of the patient by using the dose estimation model; step 6, executing CT scanning to obtain projection data of the patient; and step 7, obtaining a patient CT image with constant quality by using the image reconstruction model. The CT imaging method with constant image quality provided by the invention realizes the principle of reasonability, feasibility and as low as possible (ALARA) in radiation protection, can obtain the CT image with constant quality, and is beneficial to clinical diagnosis of the CT image.

The invention relates to a controller (106) for dental imaging of an object. The controller comprises: at least one processor (802), and at least one memory (808) including computer program code (814). The at least one memory (808) and the computer program code (814) is configured to, with the at least one processor (802), cause the controller (106) at least to: obtain first image data from an optical scanner unit (104); obtain second image data from a dental X-ray imaging unit (102); produce a first surface model (202) from the obtained first image data, wherein the first surface model (202) represents an optical three-dimensional shape of a surface of a first part of the object; and use the first surface model (202) to process the obtained second image data. The invention relates also to an imaging system (100), a method, a computer program (814), and a computer-readable medium for dental imaging of an object.

The invention provides an energy spectrum CT-based intelligent diagnosis system for calculus nephropyosis. The system comprises a data acquisition module, a feature extraction module, an intelligent identification module, a decision support module and a user interaction module, the data acquisition module is used for acquiring energy spectrum CT data of a patient; the feature extraction module is used for extracting kidney pyosis related features based on the energy spectrum CT data of the patient; the intelligent recognition module is used for recognizing the pyonephritis condition of the kidney area of the patient in combination with the relevant characteristics of pyonephritis and generating a thermodynamic diagram for representation; the decision support module is used for providing diagnosis decision support in combination with thermodynamic diagram feedback; the user interaction module is used for completing interaction between a user and the system; according to the method, the energy spectrum CT multi-dimensional features are fused and intelligent analysis is carried out, so that early recognition and visual positioning of calculus nephropyosis are realized, and the diagnosis accuracy and the clinical decision-making efficiency are improved.

An apparatus (10) for processing dark-field X-ray image data is provided. The apparatus includes a data interface (20) and a data processing unit (30). The data interface (20) is configured to provide dark-field X-ray image data to the data processing unit. The data processing unit (30) is configured to segment the image data to provide segmented image data of the lung, the segmented image data including at least a first lung segment and a second lung segment distinguishable therefrom, the first lung segment and the second lung segment being segmented into defined volumes. The data processing unit (30) is also configured to derive at least a first dark-field signal value assigned to the first lung segment and a second dark-field signal value assigned to the second lung segment from the image data. Furthermore, the data processing unit (30) is configured to derive a quantitative measure by comparing the first dark-field signal value and the second dark-field signal value with each other, the quantitative measure being output data for lung analysis.

The invention discloses a voltage regulation and control X-ray subtraction imaging method, which is characterized in that high-energy and low-energy X-ray photons are absorbed by designing a high-thickness X-ray direct detector. The internal electric field distribution of the detector is adjusted by changing the bias voltage, and part of photon-generated carriers are selectively absorbed. X-rays obtained under different voltages are used for subtraction according to a certain algorithm, different substance attributes in an X-ray image can be judged, and images of substances with different attributes are separately displayed. According to the invention, a set of different energy spectrum X-ray image separation and subtraction algorithm is provided, and the spatial distribution of different density parts of a detected object is obtained by using X-ray transmission images under different bias voltages; and according to the spatial distribution of different densities of the detected object, separating to obtain independent X-ray images of different substance attribute components of the detected object.

The present application discloses a scanning method and device, a storage medium, and a computer device, the method comprising: obtaining the flat film information of the target scan object, and determining the target bed height based on the flat film information; adjusting the flat film information based on the target bed height to obtain the target flat film information; and performing subsequent operations based on the target flat film information. The present application helps to quickly determine the target bed height, adjust the flat film information according to the target bed height, and perform subsequent operations based on the adjusted flat film information, which improves the quality of the scanned image while improving the adjustment efficiency, and greatly improves the user experience.

An X-ray diagnostic apparatus according to an embodiment includes an X-ray tube, an X-ray detector, image generating circuitry, and processing circuitry. The X-ray tube emits X-rays. The X-ray detector detects X-rays emitted from the X-ray tube and transmitted through a subject. The processing circuitry receives a designating operation related a display mode for a target that is at least one of a region of the subject and an object inserted in the subject. In response to the designating operation, the processing circuitry changes the display mode of the target in an X-ray projection image that is based on a detection result of the X-ray detector, the display mode being changed based on three-dimensional medical image data related to the subject.

The present disclosure relates to the technical field of material detection equipment, and in particular to an X-ray reciprocal space multi-scale imaging system, wherein an X-ray collimation and grating integrated device is used to modulate a cone beam X-ray to obtain a fan beam X-ray; a grating device is used to preliminarily modulate an X-ray small-angle scattering signal generated after the fan beam X-ray is irradiated to a sample to be tested; a grating and coding hole integrated device is configured with a third grating and a coding hole, and the third grating is used to modulate the preliminarily modulated X-ray small-angle scattering signal again to obtain a modulated X-ray small-angle scattering signal; the coding hole is used to modulate an X-ray diffraction signal generated after the fan beam X-ray is irradiated to a sample to be tested to obtain a modulated X-ray diffraction signal; and a detector is used to receive a modulated X-ray small-angle scattering signal and an X-ray diffraction signal. The present disclosure can integrate and automatically perform tomographic imaging of a sample to be tested, and efficiently obtain the crystal structure and mesoscopic scale information of internal voxels.

The present disclosure provides systems and methods for determining one or more diagnostic indicators using X-ray diffraction (XRD). In some embodiments, the techniques described herein relate to a system including: a fixture configured to position a region of skin of a patient within a measurement region; an X-ray source coupled to the fixture and configured to emit an X-ray beam that overlaps with the measurement region; an X-ray receiver coupled to the fixture, the X-ray receiver including a coordinate-sensitive digital detector of X-rays; and one or more processors coupled to the X-ray receiver. The one or more processors can be configured to collect XRD data from the X-ray receiver, to process the XRD data, and to determine a diagnostic indicator for assessment of a physiological or pathological condition based on the processed XRD data.

The invention is entitled "C-arm imaging system and method". The invention discloses a system for imaging an object, comprising: an X-ray source operative to transmit X-rays through the object; and a detector to receive X-ray energy of the X-rays after passing through the object and generate corresponding object X-ray intensity. The system further comprises: a controller to measure a detector entrance dose without the object placed in the X-ray beam path and determine a relationship between X-ray tube electrical parameters and the detector entrance dose. The controller further determines a relationship between the X-ray tube electrical parameters, the detector entrance dose and the detector average pixel intensity and obtains a normalized air map as a function of the X-ray tube electrical parameters based on calibration image data. The controller also generates an air map based on the normalized air map, the detector entrance dose and the detector average pixel intensity and reconstructs an image of the object based on the air map and the measured object X-ray intensity.

Provided herein is technology relating to controlling radiation and protecting biological organisms from exposure to radiation and particularly, but not exclusively, to apparatuses, methods, and systems for minimizing and / or eliminating exposure of humans to stray radiation used for medical imaging and therapy.

The invention provides a CT equipment calibration method and device based on an energy spectrum shape, equipment, a medium and a program product, and relates to the field of physics and computers, in particular to application of physics and computer technologies in the field of radiation medical treatment. The method comprises the steps that an energy spectrum shape function is constructed based on ray information, and the energy spectrum shape function comprises free parameters used for describing energy spectrum distribution characteristics; a reference material is scanned on the basis of CT equipment, respective actual measurement CT values of the multiple materials are obtained, and the reference material comprises multiple materials with known densities and element mass ratios; and determining free parameters in the energy spectrum shape function based on the actual measurement CT values of the various materials to obtain energy spectrum shape information of the CT equipment.

Disclosed herein is a radio-afterglow nanoparticle (RANP) comprising ABCD, wherein: A represents a radioabsorber; B represents a radiosensitizer; C represents a luminescent component; and D represents an amphiphilic polymeric matrix. Also disclosed herein are a method for the detection of cancer in vivo, a method of treating cancer, a method of treating cancer in a patient by administering the aforementioned radio-afterglow nanoparticle, uses of the aforementioned radio-afterglow nanoparticle, and a drug comprising the aforementioned radio-afterglow nanoparticle.

Present invention relates to safety features for radiopharmaceutical dispensing system, wherein dispensing system comprises a controller, a source of radiopharmaceutical and other components. The controller is configured to perform automated quality control of the system to ensure that the system complies quality control before radioactive dose dispensing. The quality control comprises scanning the dispensing system, network or connected devices for an unauthorized connection, malware and ensure that system is free of any such cybersecurity threat before dispensing a radioactive dose.

The present invention discloses a CT imaging method with constant image quality, which relates to the technical field of medical CT imaging, and comprises the following steps: step 1, preparing a data set, including high-dose CT projections or images of a large number of patients, and corresponding patient prior information; step 2, constructing a model, including a dose estimation model, a scanning simulation model, and an image reconstruction model; step 3, training the model constructed in step 2; step 4, obtaining patient prior information; step 5, using the dose estimation model to obtain the patient's optimal examination dose; step 6, performing CT scanning to obtain patient projection data; step 7, using the image reconstruction model to obtain a patient CT image with constant quality. The present invention provides a CT imaging method with constant image quality, which realizes the "As Low As Reasonably Possible (ALARA)" principle in radiation protection, can obtain CT images with constant quality, and is beneficial to the clinical diagnosis of CT images.

The disclosure relates to a radiation imaging device, a system, a control method, and a computer-readable storage medium. An imaging control unit in the radiation imaging device performs imaging in a plurality of modes with different setting values, and performs standby driving to reduce signals accumulated in a plurality of pixels during a period when the plurality of pixels are not irradiated with radiation. The plurality of modes include a first mode for performing a first imaging using a first setting value and a second mode for performing a second imaging using a second setting value different from the first setting value after the first imaging. In response to the end of the first imaging, the imaging control unit performs standby driving using a setting value closer to the second setting value than the first setting value, thereby performing the second imaging.

This invention discloses a geometric parameter calibration method for an X-ray imaging system, relating to the field of medical imaging equipment technology. This invention significantly improves the adaptability of portable X-ray equipment in scenarios involving rapid switching between pets of various sizes through an anatomical feature-driven parameter self-calibration mechanism. Utilizing the inherent proportional relationships of mammalian skeletons, such as the ratio of intervertebral space to rib width, geometric parameter calibration is completed in a single exposure, eliminating reliance on traditional physical calibration modules and avoiding proportional distortion of reconstructed images due to size differences. For live respiratory motion, respiratory frequency components are separated in the frequency domain of the projection data, and displacement errors are dynamically corrected through reverse compensation, effectively suppressing motion artifacts without the need for external control equipment. For the edge distortion problem of low-cost detectors, a polynomial distortion model is constructed based on the symmetry of 180° projection, combined with a robust iterative optimization algorithm, to automatically complete calibration during initial power-on or periodic scans.

The present invention provides a digital X-ray image stitching method and device, the method comprising: determining the moving position of the detector and the number of moving positions according to the coverage range of the detected object; based on the moving position, using a tube to irradiate the detected object at the center of the initial tube to obtain the irradiated image at the moving position, wherein the tube is connected to a swingable column, and when the tube is irradiating, the column moves the tube to the center of the initial tube; stitching the irradiated images to obtain a target image. The method moves the tube by the column, so that the X-ray center of the tube is always kept in the same position, thereby achieving the purpose of single-viewpoint imaging.