137 results about "Cerebral mri" patented technology

The invention discloses an Alzheimer's disease early screening method based on magnetic resonance imaging, and relates to the technical field of magnetic resonance imaging, and the method comprises the steps: obtaining information identity data and magnetic resonance scanning image data of a to-be-detected person; preprocessing the magnetic resonance scanning image data, and calculating a brain area volume and a DTI-ALPS index according to the preprocessed magnetic resonance scanning image data; constructing a brain network and calculating global network attributes and regional node attributes according to the brain network; substituting the information identity data, the brain area volume, the DTI-ALPS index, the global network attribute and the area node attribute of the to-be-tested person into an Alzheimer's disease screening model to calculate diagnosis parameters; and comparing the diagnosis parameter with the optimal diagnosis threshold value to obtain a screening result. According to the method, the brain colloidal lymphatic network function is evaluated by means of multiple high-sensitivity nerve image indexes, and the early screening capability of the Alzheimer's disease is improved.

The invention discloses a white matter microstructure calculation system and method based on multi-shell diffusion-weighted imaging, and the system comprises a data collection module which is used for obtaining diffusion-weighted imaging and structural image magnetic resonance scanning of a testee; the first data processing module is used for obtaining individual fiber orientation distribution and generating a public template of group-specific fiber orientation distribution at the same time; the second data processing module is used for co-registering the individual fiber orientation distribution diagrams to a common template and segmenting the fiber orientation distribution to obtain white matter microstructure indexes of a whole brain level; the third data processing module is used for obtaining a white matter microstructure index of each anatomical fiber bundle level; and the fourth data processing module is used for obtaining a whole brain fiber streamline based on probabilistic fiber bundle tracking and spherical deconvolution information filtering, and generating a white matter microstructure index of a network level in combination with a prior brain map. By adopting the technical scheme of the invention, quantitative calculation and analysis of the white matter microstructure change of the brain are realized.

The utility model relates to a radio frequency coil assembly for magnetic resonance scanning equipment and the magnetic resonance scanning equipment. The radio frequency coil assembly comprises a first coil structure and a second coil structure, the first coil structure can be worn on a scanning part of a detected object, and the size of the first coil structure can be matched with the size of the scanning part, so that the first coil structure is closer to and fits the scanning part, and magnetic resonance signals emitted by tissues can be received more efficiently; a higher image signal-to-noise ratio is obtained; the second coil structure is separated from the first coil structure and surrounds the outer side of the worn first coil structure, and a certain gap is formed between the second coil structure and the first coil structure, that is, the size of the second coil structure can be made to be larger, so that the device can adapt to detected objects with more body types, and the proportion of applicable people is increased; and moreover, the problem of claustrophobia of the detected object can be relieved, the comfort of the detected object is improved, and the use is more convenient.

The invention relates to a gradient-based tactile topology mapping model construction method. The method comprises the steps of obtaining functional imaging data and structural imaging data of magnetic resonance scanning of a testee; constructing a voxel-level functional connection matrix based on a voxel space in the functional imaging data; constructing a vertex-level structure connection matrix based on a cortex space in the structure imaging data; based on a gradient dimension reduction analysis processing method, matrix similarity calculation and dimension reduction analysis are carried out on the function connection matrix and the structure connection matrix, and a plurality of gradient components and variance interpretation quantities are obtained; and on the basis of the variance interpretation quantity, determining a functional main gradient and a second structural gradient, and constructing a tactile topology mapping model in combination with a tactile topology distribution rule. According to the method, the problem that the current tactile perception topological mapping is not accurate is solved, and more accurate mapping of tactile perception and brain activation is realized.

The invention discloses a cartilage calcification layer imaging method and device, equipment and a medium, and relates to the technical field of image processing, and the method comprises the steps: obtaining a to-be-imaged knee joint specimen, carrying out the magnetic resonance scanning of the to-be-imaged knee joint specimen, and obtaining a plurality of to-be-processed images; performing double-echo subtraction processing on the first to-be-processed image and the second to-be-processed image to obtain a target image which contains a cartilage calcification layer represented in a high-signal strip form and meets a preset high-resolution condition, and determining position information and form information of the cartilage calcification layer in the target image; and performing single-index fitting processing on all the to-be-processed images to obtain a target quantitative map, processing the target quantitative map based on the position information and the form information to obtain quantitative information of a cartilage calcification layer, and obtaining a target high-resolution image of the to-be-imaged knee joint specimen based on the quantitative information and the target image. And a high-definition image for clearly displaying the fine structure of the calcified cartilage layer is obtained.

The invention relates to a quick dynamic support control system compatible with magnetic resonance, which is matched with a magnetic resonance scanner to provide enough correction pressure for hard joints of a human body and realize quick and targeted posture adjustment. The core is a dynamic composite pressure support which has the magnetic resonance imaging characteristic, and deformation of the dynamic composite pressure support can be observed under magnetic resonance scanning. The supporter is formed by compounding a plurality of layers of materials and comprises a sealing layer and a magnetic resonance developing layer. The pressure adjusting device adjusts the pressure of the supports through a pneumatic pump and an air valve, rapid adjustment is achieved by pre-inflating the pressure container, and the control system monitors the pressure of the actuator, adjusts pressure distribution among the supports in real time and maintains dynamic balance of the needed pressure. During magnetic resonance scanning, a patient only needs to wear the support to prepare in a magnetic resonance scanner, and a magnetic resonance compatible material pipeline is connected with a pressure adjusting loop for adjustment. The method is widely applied to the fields of medical imaging and treatment, can provide rapid and accurate support pressure adjustment, and optimizes the treatment effect.

The invention provides a cooperative control method and system of a bed moving type magnetic resonance scanning system, a medium, a program and an electronic terminal. According to the end time T0 of a current collection sequence, the bed moving time tij corresponding to each remaining to-be-collected sequence Aij and the predicted waiting time uij of each remaining to-be-collected sequence Aij, the bed moving time tij and the predicted waiting time uij of each remaining to-be-collected sequence Aij are calculated; and selecting a next to-be-executed target acquisition sequence Atarget from the remaining to-be-acquired sequences Aij on the basis of a shortest time principle. The moving process of the scanning bed is arranged to be overlapped with'garbage time 'which is not suitable for collection in the physiological cycle of a patient, so that when a bed body accurately arrives at a target position, the physiological state of the patient is just or is about to enter a corresponding target triggering time phase; the two processes of'bed moving 'and'waiting time phase' which originally must be executed in series are parallelized to the maximum extent, and the scanning efficiency and the equipment throughput are remarkably improved.

For autonomous MR scanning of a given medical test, a simplified MR scanner can be used without or with little input or control by a technical expert, e.g., by a physician, radiologist, or person trained in MR scanner operation. The MR scanner autonomously positions, scans, checks quality, analyzes, and / or outputs answers to diagnostic questions with or without MR images. Artificial intelligence-based scan analysis allows continuous or instant changes to the scan configuration to acquire the data desired to answer the diagnostic question. By using a simplified MR scanner, both the positioning of the patient relative to the MR scanner and the localization of the scan by the MR scanner are jointly solved. Sensors can sense the patient at the scan position, with reduced radio frequency requirements allowing a more open bore.

The fast magnetic resonance imaging method provided by the invention comprises the following steps: periodically scanning a target area containing a focus through a magnetic resonance fast imaging sequence to obtain an initial magnetic resonance image sequence of a target period, the target period being any period of periodically scanning the target area; the initial magnetic resonance image sequence of the target period is corrected according to a reference period, a corrected magnetic resonance image sequence of the target period is obtained, and the reference period is a period in which a reference area containing a focus is scanned by magnetic resonance in advance to obtain a space standard image; according to the rapid magnetic resonance imaging method provided by the invention, the target area containing the focus is scanned through the magnetic resonance rapid imaging sequence, the scanned magnetic resonance image is corrected, distortion generated in the rapid scanning process is eliminated, and the efficiency and precision of magnetic resonance imaging are improved.

The invention relates to the technical field of reconstructed image anomaly detection, in particular to an image data anomaly point detection and correction method and system based on magnetic resonance fingerprints, and the method comprises the steps: generating a simulation data dictionary containing random anomaly points based on a magnetic resonance scanning plane; obtaining a to-be-detected reconstructed image, extracting a reconstructed image signal evolution curve, and matching the reconstructed image signal evolution curve with the simulation data dictionary to obtain an abnormal point position in the to-be-detected reconstructed image; and correcting the image data according to the positions of the abnormal points in the to-be-detected reconstructed image to obtain a corrected image. According to the method, the scanned and acquired data is matched with the pre-generated data dictionary containing the random abnormal points, so that whether the abnormal points are contained or not can be detected, the abnormal points are corrected, related image artifacts are eliminated, reconstructed image anomaly detection can be realized without an AI model, manpower and material resources are saved, the stability is better, and the detection efficiency is improved. Deployment and implementation can be carried out in magnetic resonance imaging equipment.

The invention relates to a patient somatosensory monitoring system, method, device and equipment. The system comprises a magnetic resonance imaging device used for performing magnetic resonance scanning on a patient; the sensor is used for collecting local somatosensory data of the patient during magnetic resonance scanning in the magnetic resonance imaging equipment; the visual processing unit is used for receiving the local somatosensory data collected by the sensor, and predicting to obtain global somatosensory data according to the local somatosensory data; wherein the type of the local somatosensory data is the same as or different from that of the global somatosensory data; and the display unit is used for receiving the global somatosensory data sent by the visualization processing unit and displaying the global somatosensory data. By adopting the scheme, the arrangement difficulty of the sensor can be reduced.

A magnetic resonance-compatible programmable synchronized photostimulation system includes a main control unit and a stimulation execution unit. The main control unit is located outside the magnetic resonance scanning room, while the stimulation execution unit is located inside the scanning room and consists only of an LED light panel shielded by a magnetic field. The main control unit is configured to: receive photostimulation sequence parameters configured by the user in a modular manner through a graphical interface; receive a scan trigger signal from the magnetic resonance equipment, and automatically control the start and stop of the photostimulation sequence based on the trigger signal using hardware triggering; thereby achieving high-precision time synchronization between photostimulation and magnetic resonance scanning while maintaining magnetic resonance compatibility. This invention solves electromagnetic compatibility issues through a split architecture, achieves millisecond-level synchronization accuracy through hardware TTL triggering, and enhances experimental paradigm flexibility through modular programmable sequences, making it suitable for neuroscience research fields such as functional magnetic resonance imaging.

The application provides a portable magnetic resonance imaging-based brain disease remote diagnosis system, and belongs to the cross field of medical imaging and remote medical treatment.The system comprises a portable magnetic resonance imaging device, a remote data transmission and cooperation network and a remote diagnosis and AI auxiliary workstation; wherein the portable magnetic resonance imaging device is arranged in a primary medical institution, is used for performing standardized scanning on a patient's brain disease under a low-field magnetic field, and acquires brain image data of the patient; the remote data transmission and cooperation network is used for connecting the device end and the diagnosis end, and is used for transmitting the brain image data to the remote diagnosis and AI auxiliary workstation; and the remote diagnosis and AI auxiliary workstation is used for performing brain disease analysis based on the brain image data and generating a structured report, and the report is returned to the primary medical institution.The application combines remote medical treatment and on-site magnetic resonance scanning, optimizes medical resources, and improves diagnosis effect.

The application relates to a positioning correction method, a positioning correction device and a storage medium, wherein the positioning correction method comprises the following steps: acquiring a to-be-detected image; wherein the to-be-detected image is an image generated after positioning failure of a magnetic resonance object in magnetic resonance scanning; performing abnormal positioning analysis on the to-be-detected image to determine an abnormal positioning cause of the magnetic resonance object; and determining and outputting positioning correction information based on the abnormal positioning cause. The positioning correction method can analyze the positioning failure cause, provide a positioning correction scheme, facilitate a user to successfully complete automatic positioning based on the positioning correction information, and thus reduce the operation complexity of the magnetic resonance scanning.

The invention relates to a magnetic resonance scanning method and a scanning control method of a magnetic resonance system. The method comprises the following steps: based on physique information, body position information and a to-be-scanned part of a detected object, searching a target PNS limit value model adaptive to the detected object from a plurality of groups of PNS limit value models; the multiple groups of PNS limit value models are obtained by performing gradient pulse testing on a plurality of prior test objects with different physiques at different body positions and different scanning parts; determining a PNS limit value corresponding to the sequence to be scanned based on the target PNS limit value model; in response to the fact that the PNS predicted value of the sequence to be scanned is not matched with the corresponding PNS limit value, optimizing at least one parameter of the sequence to be scanned; and scanning the to-be-scanned part of the detected object by adopting the optimized scanning sequence. By adopting the method, the gradient performance of the magnetic resonance system can be brought into full play, and the scanning result of magnetic resonance can be improved.

The embodiment of the invention provides a magnetic resonance image-based temperature calculation and magnetic resonance guided laser ablation method, and the method comprises the steps: periodically scanning a target region containing a focus through a magnetic resonance fast imaging sequence, and obtaining an initial magnetic resonance image sequence of a target period, the target period is any period of periodically scanning the target area; the initial magnetic resonance image sequence of the target period is corrected according to a reference period, a corrected magnetic resonance image sequence of the target period is obtained, and the reference period is a period in which a reference area containing a focus is scanned by magnetic resonance in advance to obtain a space standard image; the corrected magnetic resonance image sequence of the target period and the corrected magnetic resonance image sequence of the historical period are used to generate the temperature map of the target period, the historical period is any period before the target period, distortion generated in the rapid scanning process is eliminated, and the accuracy and convenience of temperature monitoring are improved.

1. The name of the design product: the main body of the magnetic resonance monitor trolley. 2. The use of the design product: the whole product is used for real-time monitoring of patient's vital signs during magnetic resonance scanning, and the local part of the product is used for the main body of the magnetic resonance monitor trolley. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view. 5. Other circumstances that need to be explained: the design requests partial design protection, the solid line part in the view is the content requested for protection, and the dashed line part is not requested for protection.

The application provides a method and system for removing electro-physiological signal gradient artifacts in a magnetic resonance environment, and relates to the technical field of magnetic resonance image processing. The method comprises: collecting an electro-physiological signal of a magnetic resonance scan and a scan synchronization signal; aligning and windowing the electro-physiological signal based on the scan synchronization signal to obtain a windowed sequence; constructing an artifact template based on the windowed sequence; combining the windowed sequence and the artifact template to calculate a first residual; performing principal component analysis on the artifact template and the first residual to obtain a second residual; performing logarithmic domain conversion and polarity extraction operations on the second residual to obtain a logarithmic domain sequence and a polarity symbol layer; inputting the logarithmic domain sequence into a deep learning denoising network to output a de-artifact logarithmic domain sequence; and performing inverse logarithmic transformation and polarity recovery operations on the de-artifact logarithmic domain sequence and the polarity symbol layer, respectively, to determine a de-artifact signal.

The present application relates to the technical field of internal target area delineation based on 4D magnetic resonance imaging, and discloses a method, apparatus, device, and medium for internal target area delineation based on 4D magnetic resonance imaging. The method comprises: obtaining a first abdominal 4D magnetic resonance image and each second abdominal 4D magnetic resonance image; determining a first probability distribution based on a preset organ reference position and the first abdominal 4D magnetic resonance image, and determining each second probability distribution based on the preset organ reference position and each second abdominal 4D magnetic resonance image; determining a target scan duration based on the first probability distribution and each second probability distribution; performing a 4D magnetic resonance scan on a target object based on the target scan duration, obtaining a target nuclear magnetic resonance image corresponding to the target scan duration, and performing internal target area delineation based on the target nuclear magnetic resonance image. The method can determine an appropriate target scan duration, shorten the 4D magnetic resonance scan duration of the target object, and improve the accuracy of internal target area delineation.

The present application relates to a kind of transcranial electrical stimulation system capable of being used in magnetic resonance environment synchronously.The present application includes electrical stimulation instrument, fluorescent thermometer and nuclear magnetic compatible kit, the electrical stimulation instrument is connected nuclear magnetic compatible kit by first coaxial cable, the nuclear magnetic compatible kit is connected stimulation electrode in nuclear magnetic resonance instrument by second coaxial cable and third coaxial cable, the fluorescent thermometer is connected stimulation electrode in the nuclear magnetic resonance instrument by optical fiber.The present application can be in the process of tDCS stimulation and after stimulation stops to the subject for magnetic resonance scanning, analysis stimulation to brain, functional magnetic resonance imaging (fMRI) technology has higher spatial resolution, can observe the influence of transcranial electrical stimulation to brain in the process and after electrical stimulation, can better study the mechanism of transcranial electrical stimulation;It has important influence to the basic mechanism research of tDCS, simple operation.

A method for performing a scan of a subject utilizing a magnetic resonance imaging (MRI) system includes triggering a prescan by an MRI scanner of the MRI system upon the subject being setup on a table of the MRI scanner and the table reaching an iso-center of the MRI scanner. The method includes subsequent to the prescan, triggering a calibration scan of the subject with the MRI scanner, wherein the calibration scan is an acoustic noise suppressed MRI scan. The method includes obtaining calibration data from the calibration scan. The method includes obtaining prescription parameters for subsequent scans of the subject with the MRI scanner from the calibration data. The method includes triggering at least one scan of the subject with the MRI scanner based on the prescription parameters.

The invention discloses an ultra-short echo sequence magnetic resonance image processing method and device and a medium. The processing method comprises the following steps: performing magnetic resonance scanning on a to-be-imaged part of a patient by adopting a UTE sequence, acquiring N (N is greater than or equal to 4) magnetic resonance images of echo time, and storing the magnetic resonance images as image data in a DICOM format; converting the magnetic resonance image data from a DICOM format to an NIFTI format for storage; and performing analytic calculation on the long and short values by using a four-point analytic model based on piecewise exponential decay hypothesis, and finally obtaining a three-dimensional parameter distribution diagram of the rapid relaxation time, the slow relaxation time and the proportion (f) of rapid relaxation time protons in the ultra-short echo signal. According to the method, the processing time of the three-dimensional UTE image data is remarkably shortened to about 10 seconds from 10 hours of a traditional method by adopting an analytical algorithm, and meanwhile, the proportion of the number of slow relaxation protons and the number of fast relaxation protons can be effectively distinguished.

The present application relates to a magnetic resonance imaging method, apparatus, and device, wherein the magnetic resonance imaging method is used to generate a first image and a second image in a single magnetic resonance scan; the method comprises: acquiring a myocardial signal of a scanned patient, the myocardial signal comprising multiple consecutive cardiac cycles; determining a first acquisition period and a second acquisition period within the same cardiac cycle, acquiring first K-space data of a region of interest of the scanned subject during the first acquisition period, and acquiring second K-space data of a region of interest of the scanned subject during the second acquisition period; generating a first image based on the first K-space data, and generating a second image based on the second K-space data. This application solves the problem in the prior art that a single magnetic resonance scan can only complete one type of K-space data acquisition and generate one type of magnetic resonance image, reduces the number of magnetic resonance scans, and has the technical effect of higher image generation efficiency.

The invention relates to a radio frequency pulse flip angle determination method and device and computer equipment. And according to the actual scanning parameter and the signal amplitude function of the magnetic resonance scanning sequence, determining the candidate signal amplitude of each candidate flip angle corresponding to the radio frequency pulse under the actual scanning parameter, and according to the candidate signal amplitude of each candidate flip angle, determining a target flip angle corresponding to the radio frequency pulse. In the embodiment of the invention, the candidate signal amplitudes of the plurality of candidate flip angles under the actual scanning parameter are determined through the signal amplitude function, and the target flip angle of the radio frequency pulse under the actual scanning parameter is determined according to the plurality of candidate signal amplitudes, so that the flip angle of the radio frequency pulse in the spin echo sequence is optimized, the longitudinal magnetization vector is recovered more quickly, and the accuracy of the spin echo sequence is improved. Therefore, the signal amplitude generated by excitation each time is improved, and the signal-to-noise ratio of a magnetic resonance image is finally improved.

The application discloses a method, device, equipment, medium and product for predicting radio frequency heating of a medical implant in magnetic resonance, and relates to the field of medical instruments and equipment. The device comprises an electromagnetic field model, a phantom model, a plurality of to-be-tested medical implant models with different configuration parameters, and a host computer module. By simulating a magnetic resonance scanning environment, combining the physical characteristics of the phantom model and the to-be-tested medical implant, and coupling the electromagnetic field to the temperature field by using the host computer module and performing data processing, the temperature prediction of the radio frequency heating effect of the medical implant in the magnetic resonance examination is realized. The application considers that the implant is in different parts of the medium, and the temperature of the radio frequency heating effect of the medical implant in the magnetic resonance examination is predicted, so that the radio frequency heating safety evaluation can be performed in advance, potential safety risks can be effectively avoided, and the detection efficiency is improved.

The invention relates to a magnetic resonance imaging method and device. The method comprises the following steps: performing magnetic resonance scanning on a target object according to a preset sampling track to obtain multi-phase original scanning data of the target object; the original scanning data of different periods comprises scanning data of different slice layers of the target object; determining a coil sensitivity graph according to the original scanning data of each phase, and reconstructing the original scanning data of each phase according to the coil sensitivity graph to obtain a multi-phase scanning image of the target object; and performing magnetic resonance imaging based on the multi-phase scanning image. According to the method, the static high-definition imaging requirement and the dynamic high-definition imaging requirement can be met at the same time through one scanning process, and the multi-phase scanning image obtained through reconstruction can be suitable for various different imaging modes, so that magnetic resonance images in different imaging modes are obtained; the magnetic resonance imaging efficiency can be improved, and the magnetic resonance imaging effect can also be improved.

A method of operating a medical system (100, 300) is disclosed herein. The method includes receiving (200) a pulse sequence command (124) configured to control a magnetic resonance imaging system (302) to acquire k-space data (330) according to a compressed sensing magnetic resonance imaging protocol. The method also includes receiving (202) magnetic resonance scan parameters describing a configuration of the pulse sequence command and a configuration of the magnetic resonance imaging system. The method also includes receiving (204) a predicted undersampling factor (128) in response to inputting the magnetic resonance scan parameters into a neural network, wherein the neural network is configured to output the predicted undersampling factor in response to receiving magnetic resonance scan parameters. The method also includes adjusting (206) the pulse sequence command (130) to select or modify sampling of the k-space data based on the predicted undersampling factor.

The invention relates to a magnetic resonance scanning method, system and device and a storage medium. The method comprises the following steps: determining sequence scanning time corresponding to each mark delay scanning process according to corresponding mark duration time and mark delay time in a multi-mark delay scanning process required by a perfusion area to be scanned; obtaining a target pulse sequence based on the sequence scanning time; and scanning the perfusion area to be scanned according to the target pulse sequence until the multi-mark delay scanning process is completed. By adopting the method, the scanning efficiency can be improved.

The disclosure is directed to an undersampled point restoration method, device and magnetic resonance imaging system in magnetic resonance imaging. The method may include, during magnetic resonance scanning of an imaging subject, acquiring magnetic resonance signals of each channel by an undersampling mode and respectively placing the acquired magnetic resonance signals of each channel into the K-space of the each channel; and for any undersampled point in the K-space of each channel of the imaging subject, restoring the undersampled point by performing high-order interpolation on data points surrounding the undersampled point. Aspects improve the accuracy of restoring undersampled points in MR imaging, thereby further enhancing the quality of MR images.

This application provides a magnetic resonance imaging method, apparatus, MRI device, and medium. The method improves a first bSSFP sequence to obtain a first sequence such that the total gradient area of ​​the first slice-selective gradient, the first slice-selective convergence gradient, and the first slice-selective complex phase gradient within each first TR in the first sequence is not equal to zero. Based on the first sequence, magnetic resonance scanning is performed on the imaging tissue of the object to be detected, and a target magnetic resonance image of the imaging tissue is reconstructed. Thus, the MRI device applies different additional phases to the imaging protons at different z-positions in the slice-selective direction for each imaging voxel, resulting in different spectral responses for the imaging protons at different z-positions in the slice-selective direction. By superimposing the spectra of multiple imaging protons within a single imaging voxel, the integral averaging of the imaging proton signals at different positions within the imaging voxel can be achieved, thereby avoiding the overall signal of a single imaging voxel being zero, and thus suppressing black band artifacts in the reconstructed magnetic resonance image.