82 results about "Cerebral mri" patented technology

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 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.

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 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.

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 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.

The invention discloses an artifact-removing shaping pillow device for magnetic resonance scanning. The artifact-removing shaping pillow device comprises a shaping pillow body, a temperature control circulating device and a controller. A low-temperature thermoplastic core, a microcirculation pipe network used for circulating heat conduction liquid and a distributed sensing network used for monitoring the temperature in real time are arranged in the moldable pillow body. The temperature control circulating device comprises a bidirectional heat exchange module used for heating and refrigerating the heat conduction liquid and a circulating pump connected with the bidirectional heat exchange module. The controller can accurately control the temperature control circulating device through closed-loop feedback according to real-time multi-point temperature data provided by the sensing network, so that rapid, uniform and safe heating softening and cooling shaping of the thermoplastic core are realized. According to the invention, the plastic pillow body is utilized to form an individualized support fitting the neck curve for a patient, and an air gap in a neck scanning area can be filled, so that magnetic sensitivity artifacts are inhibited, and the diagnostic quality of magnetic resonance images is remarkably improved.

A scanning method and system of a multi-nuclear magnetic resonance system, the method comprising: obtaining a first sequence to be scanned by the multi-nuclear magnetic resonance system; identifying a first blank period of the first sequence scanning; identifying a second sequence of a target to-be-scanned nucleus capable of being scanned in the first blank period according to the first sequence, the first blank period, and scanning parameters of a candidate to-be-scanned nucleus of the multi-nuclear magnetic resonance system; and performing magnetic resonance scanning on the second sequence in the first blank period.

Embodiments of the present application provide a magnetic resonance scanning and imaging method, and a magnetic resonance imaging system. The method includes: determining a pulse to be adjusted in a scan sequence, the pulse to be adjusted including a first radio-frequency pulse and a first gradient pulse applied along with the first radio-frequency pulse; determining an adjustment factor based on the first gradient pulse and a minimum repetition time related to a specific absorption rate of radio-frequency energy; adjusting the scan sequence based on the adjustment factor; and, using the adjusted scan sequence, performing a diagnostic scan on a site to be examined, to obtain a magnetic resonance image.

This invention provides a device and method for acquiring a three-dimensional model of abdominal organs, comprising: a coil support assembly, an MRI scanner, and an image processing device; the coil support assembly is clamped and fixed to the side of the examination bed to support the abdominal coil and reduce pressure on the abdomen of the user; the MRI scanner is positioned above the abdomen of the user, with the axis of the examination positioning light aligned with the midpoint of the axis of the coil support assembly, and a magnetic resonance imaging (MRI) scan sequence is acquired by scanning with the MRI scanner; the image processing device is communicatively connected to the MRI scanner, acquires the MRI scan sequence, and obtains a three-dimensional model of the abdominal organs based on the MRI scan sequence. This invention achieves precise extraction of abdominal organs at all levels through multi-region seed point strategies and adaptive threshold segmentation, overcoming the inefficiency and subjective limitations of traditional manual segmentation, and ensuring the reliability of the results through automated algorithms, thus providing support for the image analysis of abdominal organs.

The embodiment of the invention discloses an under-sampling point recovery method and device in magnetic resonance imaging and a magnetic resonance imaging system. The method comprises the following steps: in the process of performing magnetic resonance scanning on an imaging target by adopting a multi-echo data imaging merging sequence, acquiring magnetic resonance signals of echoes of channels in an undersampling mode, and putting the acquired magnetic resonance signals of the echoes of the channels into K spaces of the echoes of the channels respectively, each channel has a plurality of echoes, and each echo of each channel corresponds to a K space; and for an under-sampling point in the K space of a specified echo of a specified channel of the imaging target, recovering the under-sampling point by adopting the magnetic resonance signals in the K spaces of the echoes of all channels and the magnetic resonance signals in the K spaces of other echoes of the specified channel. According to the embodiment of the invention, the under-sampling point recovery accuracy during MR imaging by adopting the MEDIC sequence is improved.

This application relates to a magnetic resonance imaging (MRI) scanning method and a MRI system. The method includes: a processor determining the distance from a target region of the subject to the center of the MRI scanner based on the physiological characteristics of the subject; controlling the MRI scanning bed to move the subject according to the distance, so that the target region is moved to a position corresponding to the center of the MRI scanner; and using a receiving coil to receive the MRI signal generated by the nuclear spin of the target region, reconstructing the MRI signal to obtain a medical image of the target region. The receiving coil includes multiple nodes, and the relative positions of at least two adjacent nodes are adjustable. In this method, before entering the scanning chamber, the processor calculates the distance between the target region and the center of the MRI scanner in the MRI scanning system based on the physiological characteristics and target region information of the subject, and completes the automatic scanning and positioning of the target region based on the receiving coil, thus improving the efficiency of MRI scanning.

The invention discloses a magnetic resonance eyeball imaging method and system based on resolution control, and the method comprises the steps: determining the pathological information of a target user in response to an imaging demand; determining a scanning resolution parameter of the target user based on a scanning prediction algorithm according to the pathological information; performing magnetic resonance scanning on the eyeball part of the target user according to the scanning resolution parameter to obtain a plurality of scanning images with different resolutions; and generating a three-dimensional eyeball model corresponding to the target user based on a three-dimensional reconstruction algorithm according to the plurality of scanning images with different resolutions. Therefore, accurate eyeball three-dimensional modeling based on pathological information and multi-resolution images can be realized, the eyeball imaging accuracy and diagnosis reliability are improved, and the model distortion risk caused by improper resolution is reduced.

The application relates to a magnetic resonance scan control method, a graphical user interface device system and a magnetic resonance imaging system. An initial positioning image of a magnetic resonance scan is acquired, and an excitation region of a metabolite of interest is selected in the initial positioning image of the magnetic resonance scan. An auxiliary mark is displayed on or around the excitation region of the metabolite of interest, and the auxiliary mark is associated with scan parameters. According to the auxiliary mark, an excitation region of an interfering metabolite is determined. It is judged whether the excitation region of the interfering metabolite exists. If the excitation region of the interfering metabolite does not exist, the magnetic resonance scan is performed by using the scan parameters; otherwise, the auxiliary mark is adjusted until the excitation region of the interfering metabolite does not exist. The magnetic resonance scan control method improves data quality and optimizes the problem that an interfering metabolite is excited due to a chemical shift effect.

The application relates to a scanning parameter setting method and device and a magnetic resonance scanning method. The method comprises the following steps: a computer device acquires a reference scanning sequence corresponding to a target part, determines a first scanning range of an excited slice layer of the target part according to the reference scanning sequence, acquires a to-be-executed scanning protocol, determines a second scanning range of a to-be-excited slice layer of the target part according to the to-be-executed scanning protocol, adjusts a scanning parameter of the to-be-executed scanning protocol in the case that the second scanning range is different from the first scanning range, and generates a target scanning sequence. In the method, the computer device generates at least one target scanning sequence in which a to-be-excited slice layer is aligned with an excited slice layer determined by the reference scanning sequence based on the first scanning range and the second scanning range of the reference scanning sequence. In this case, the scanning parameter of the to-be-executed scanning protocol can reuse the scanning parameter of the reference scanning sequence, and the accuracy of a medical image analysis result of the target part is improved.

The application relates to a magnetic resonance signal acquisition method and device, computer equipment and a storage medium. The method comprises the following steps: acquiring the number of groups of multi-layer simultaneous excitation of radio frequency pulses for a target object; when the number of groups of multi-layer simultaneous excitation is even, adjusting a preset excitation timing for a target layer group to obtain a target excitation timing; the target layer group comprises a group of layers that are first or last excited in a repetition time of the radio frequency pulses; in the target excitation timing, spatially adjacent layers are not adjacent in the timing; controlling the radio frequency pulses based on the target excitation timing to perform multi-layer simultaneous excitation processing on the target object; acquiring multi-layer simultaneous excitation data of the target object; and the multi-layer simultaneous excitation data is used for magnetic resonance imaging of the target object. The method can improve the magnetic resonance imaging effect.

A method, a magnetic resonance apparatus, and a computer program product are disclosed. In particular, a method is provided for determining an RF transmission pulse for a magnetic resonance scan by a magnetic resonance apparatus including a gradient coil unit. The method includes a provision of a deviation information item, wherein the deviation information item characterizes a position-dependent deviation from a target state, caused by the gradient coil unit, in an imaging region of the magnetic resonance apparatus. The RF transmission pulse is determined taking account of the deviation information item.

Embodiments of the present specification disclose a method and system for magnetic resonance enhanced scanning for imaging an animal. The method comprises the steps that an imaging animal is placed on a tray in a preset placement posture, the tray comprises a body part fixing part, and the body part fixing part is configured to fix the preset placement posture of the imaging animal placed on the body part fixing part; the imaging animal is placed in the magnetic resonance scanning equipment through the tray, and contrast agent injection is conducted on the imaging animal; and performing magnetic resonance scanning on the imaging animal injected with the contrast agent by using magnetic resonance scanning equipment to obtain an enhanced magnetic resonance image.