Magnetic Resonance Scanning Methods and Magnetic Resonance Systems

Abstract

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.

Description

Technical Field

[0001] This application relates to the field of medical technology, and in particular to a magnetic resonance scanning method and a magnetic resonance system. Background Technology

[0002] In existing magnetic resonance imaging (MRI) positioning technology, on the one hand, laser positioning is used to locate the subject's examination area, which poses certain risks to the subject; on the other hand, during MRI scanning, coils need to be placed on the subject's examination area, and some coils need to be fixedly tied to the subject's body. If the examination area needs to be adjusted during the scanning process, the operator needs to enter the scanning device to disassemble and adjust the coils.

[0003] Current magnetic resonance imaging (MRI) positioning and scanning technology relies on manual operation, resulting in low efficiency and accuracy of MRI scans. Summary of the Invention

[0004] Therefore, it is necessary to provide a magnetic resonance scanning method, system, device, computer equipment, and storage medium that can improve the efficiency and accuracy of magnetic resonance scanning, in order to address the above-mentioned technical problems.

[0005] Firstly, a magnetic resonance scanning method is provided, the method comprising:

[0006] Based on the physiological characteristics of the subject, determine the distance from the target area of ​​the subject to the center of the magnetic resonance scanner;

[0007] Based on the distance, the magnetic resonance scanning bed is controlled to move the object being detected so that the target part is moved to the position corresponding to the center of the magnetic resonance scanner.

[0008] The receiving coil is used to receive the magnetic resonance signal generated by the nuclear spin of the target region; the receiving coil includes multiple nodes, and the relative positions of at least two adjacent nodes are adjustable;

[0009] Reconstructing magnetic resonance signals yields medical images of the target area.

[0010] In one embodiment, the receiving coil includes a first receiving coil and a second receiving coil, and the reconstructed magnetic resonance signal obtains a medical image of the target site, including:

[0011] The initial scanning range of the target region is determined based on the first magnetic resonance signal from the first receiving coil.

[0012] Based on the target area and the initial scanning range of the target area, a magnetic resonance scan is performed on the target area using a second receiving coil to obtain a medical image of the target area.

[0013] In one embodiment, the physiological characteristic information includes the height of the subject and the height percentage of multiple candidate body parts; determining the distance from the target body part of the subject to the center of the magnetic resonance scanner based on the physiological characteristic information of the subject includes:

[0014] Based on the height percentage of each candidate body part, determine the height percentage corresponding to the target body part.

[0015] Based on the height ratio of the target area and the preset first distance, the distance from the target area to the center of the magnetic resonance scanner is determined; the first distance is the distance from the patch on the top of the magnetic resonance scanning bed where the subject is located to the center of the magnetic resonance scanner.

[0016] In one embodiment, determining the distance from the target part to the center of the magnetic resonance scanner based on the height ratio of the target part and a preset first distance includes:

[0017] The second distance is determined based on the height ratio of the target area, the height of the subject being tested, and the position of the patch on the top of the head; the second distance is the distance from the target area to the patch on the top of the head.

[0018] The sum of the second distance and the first distance is determined as the distance from the target area to the center of the magnetic resonance scanner.

[0019] In one embodiment, the above-mentioned method of performing magnetic resonance scanning on the target region based on the second receiving coil, according to the target region and the initial scanning range of the target region, to obtain a medical image of the target region, includes:

[0020] The second receiving coil to be moved is determined based on the field of view of the initial scanning range of the target part;

[0021] Based on the scanning contour of the initial scanning range of the target part, determine the scanning area of ​​the target part;

[0022] According to the scanning area, move the second receiving coil to be moved to the scanning area;

[0023] The second receiving coil, after being moved, receives the second magnetic resonance signal generated by the nuclear spin of the target site, and obtains a medical image of the target site based on the second magnetic resonance signal.

[0024] In one embodiment, moving the second receiving coil to be moved to the scanning area according to the scanning area includes:

[0025] Obtain the center position of the scanned area;

[0026] Determine the degree of horizontal contraction of the second receiving coil to be moved based on the center position;

[0027] Based on the image quality of the positioning image in the scanning area, determine the degree of vertical contraction of the second receiving coil to be moved;

[0028] Based on the horizontal and vertical contraction of the second receiving coil to be moved, the second receiving coil to be moved is moved to the scanning area.

[0029] In a second aspect, a magnetic resonance system is provided, which includes: a processor, a magnetic resonance scanner, a magnetic resonance scanning bed, and a receiving coil;

[0030] The processor is configured to execute the magnetic resonance localization scanning method provided in any of the first aspects above when the object to be detected is on a magnetic resonance scanning bed;

[0031] The receiving coil is used to receive the magnetic resonance signal generated by the nuclear spin of the target area of ​​the object being detected. The magnetic resonance signal is used to reconstruct a medical image of the target area.

[0032] In one embodiment, the receiving coil includes a first receiving coil and a second receiving coil;

[0033] The first receiving coil is disposed inside the magnetic resonance scanner; the second receiving coil is movably disposed at one end of the magnetic resonance scanning bed away from the magnetic resonance scanner.

[0034] The first receiving coil is used to receive the first magnetic resonance signal generated by the nuclear spin of the target part of the object being detected when the magnetic resonance scanning bed is moved into the magnetic resonance scanner, so as to obtain the initial scanning range of the target part.

[0035] The second receiving coil is used to receive the second magnetic resonance signal generated by the nuclear spin of the target part of the object being detected, so as to obtain a medical image of the target part.

[0036] In one embodiment, a top patch is positioned at a predetermined location on the magnetic resonance scanning bed.

[0037] In one embodiment, a coil interface for communicating with a second receiving coil is provided on the side wall of the magnetic resonance scanning bed.

[0038] The processor is used to control the second receiving coil to retract and / or move based on the coil interface.

[0039] Thirdly, a magnetic resonance scanning device is provided, the device comprising:

[0040] The determination module is used to determine the distance from the target part of the object to the center of the magnetic resonance scanner based on the physiological characteristics of the object being detected.

[0041] The control module is used to control the movement of the magnetic resonance scanning bed carrying the object to be detected based on the distance, so that the target part is moved to the position corresponding to the center of the magnetic resonance scanner;

[0042] A receiving module is used to receive magnetic resonance signals generated by nuclear spins at a target location using a receiving coil; the receiving coil includes multiple nodes, and the relative positions of at least two adjacent nodes are adjustable;

[0043] The imaging module is used to reconstruct magnetic resonance signals to obtain medical images of the target area.

[0044] Fourthly, a computer device is provided, including a memory and a processor, the memory storing a computer program, the processor executing the computer program to implement the magnetic resonance scanning method described in any of the first aspects above.

[0045] Fifthly, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the magnetic resonance scanning method described in any of the first aspects above.

[0046] The aforementioned magnetic resonance imaging (MRI) scanning method, system, apparatus, computer equipment, and storage medium involve a processor determining the distance from the target site of the subject to the center of the MRI scanner based on the subject's physiological characteristics. Based on this distance, the processor controls the MRI scanning bed to move the subject, positioning the target site at the location corresponding to the center of the MRI scanner. A receiving coil then receives the MRI signal generated by the nuclear spin of the target site, reconstructing the MRI signal to obtain a medical image of the target site. The receiving coil comprises multiple nodes, with the relative positions of at least two adjacent nodes adjustable. This method eliminates the need for laser positioning. Before entering the scanning chamber, the processor preliminarily calculates the distance between the target site and the center of the MRI scanner based on the subject's physiological characteristics and target site information, automatically positioning the receiving coil for the target site. This eliminates the need for manual coil placement and adjustment, improving both the accuracy and efficiency of the MRI scan. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the structure of a magnetic resonance system in one embodiment;

[0048] Figure 2 This is a schematic diagram of the structure of a magnetic resonance system in one embodiment;

[0049] Figure 3 This is a schematic diagram of the structure of a magnetic resonance system in one embodiment;

[0050] Figure 4 This is a schematic diagram of the structure of a magnetic resonance system in one embodiment;

[0051] Figure 5 This is a flowchart illustrating a magnetic resonance scanning method in one embodiment;

[0052] Figure 6 This is a schematic diagram of a receiving coil in a magnetic resonance scanning method in one embodiment;

[0053] Figure 7 This is a flowchart illustrating a magnetic resonance scanning method in one embodiment;

[0054] Figure 8 This is a flowchart illustrating a magnetic resonance scanning method in one embodiment;

[0055] Figure 9 This is a schematic diagram of a magnetic resonance scanning method for acquiring physiological information of a test subject in one embodiment;

[0056] Figure 10 This is a flowchart illustrating a magnetic resonance scanning method in one embodiment;

[0057] Figure 11 This is a flowchart illustrating a magnetic resonance scanning method in one embodiment;

[0058] Figure 12 This is a flowchart illustrating a magnetic resonance scanning method in one embodiment;

[0059] Figure 13 This is a schematic diagram of the timing of echo signal acquisition in a magnetic resonance scanning method in one embodiment;

[0060] Figure 14 This is a flowchart illustrating a magnetic resonance scanning method in one embodiment;

[0061] Figure 15 This is a schematic diagram of the structure of a magnetic resonance scanning device in one embodiment;

[0062] Figure 16 This is a schematic diagram of the structure of a magnetic resonance scanning device in one embodiment;

[0063] Figure 17 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0064] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0065] The magnetic resonance scanning method provided in this application can be applied to, for example... Figure 1 The magnetic resonance system shown. Figure 1A magnetic resonance system is provided, which includes a processor 1, a magnetic resonance scanner 2, a magnetic resonance scanning bed 3, and a receiving coil 4.

[0066] In this process, when the object to be detected is carried on the magnetic resonance scanning bed, the processor 1 determines the distance from the target part of the object to the center of the magnetic resonance scanner based on the physiological characteristics of the object. Based on the distance, the processor controls the magnetic resonance scanning bed 3 to move the object to be detected so that the target part moves to the position corresponding to the center of the magnetic resonance scanner 2 (the center of the main magnetic field). The processor then uses the receiving coil 4 to receive the magnetic resonance signal generated by the nuclear spin of the target part, thereby reconstructing the magnetic resonance signal to obtain a medical image of the target part.

[0067] In this embodiment, optionally, the processor 1 acquires the physiological characteristic information of the object to be detected, determines the target area of ​​the object to be scanned, determines the distance from the target area of ​​the object to the center of the magnetic resonance scanner 2, and controls the magnetic resonance scanning bed 3 to move the object by this distance so that the target area of ​​the object moves to the center of the magnetic resonance scanner 2. Optionally, after the object enters the center of the magnetic resonance scanner 2, a preliminary scan of the target area can be performed using the receiving coils 4 to determine the initial scan range of the target area. Further, the processor 1 can perform fine-tuning scans using the image of the initial scan range, for example, adjusting parameters such as the range of the receiving coils used to receive the magnetic resonance signals generated by the target area. After adjustment, the processor determines the number of receiving coils 4 based on the target area and the initial scan range, and moves the corresponding number of receiving coils 4 to the target area. The receiving coils 4 are used to receive the magnetic resonance signals generated by the nuclear spins of the target area, thereby reconstructing the magnetic resonance signals to obtain a medical image of the target area.

[0068] In this method, the aforementioned magnetic resonance system does not use lasers for positioning. Before entering the scanning chamber, the processor preliminarily calculates the distance between the target area and the center of the magnetic resonance scanner in the magnetic resonance scanning system based on the physiological characteristics and target area information of the object being detected. This allows for automatic scanning and positioning of the receiving coil of the target area, eliminating the need for manual placement and adjustment of the coil. This ensures the accuracy of the magnetic resonance scanning results while improving the efficiency of the magnetic resonance scanning.

[0069] To improve the positioning accuracy of the target area of ​​the detection object, in one embodiment, such as Figure 2 As shown, the receiving coil 4 includes a first receiving coil 41 and a second receiving coil 42.

[0070] The first receiving coil 41 is disposed inside the magnetic resonance scanner, such as located on the inner wall of the cavity formed by the magnetic resonance scanner or integrated into the magnetic resonance scanner; the second receiving coil 42 is movably disposed at one end of the magnetic resonance scanning bed 3 away from / away from the magnetic resonance scanner 2.

[0071] The first receiving coil 41 is used to receive the first magnetic resonance signal generated by the nuclear spin of the target part of the object being detected when the magnetic resonance scanning bed 3 moves into the magnetic resonance scanner, so as to obtain the initial scanning range of the target part.

[0072] In this embodiment, the first receiving coil 41 is configured as a transceiver coil. When the magnetic resonance scanning bed 3 moves into the magnetic resonance scanner, the processor controls the magnetic resonance scanner to scan the positioning image of the target part of the object being detected. The first receiving coil 41 receives the first magnetic resonance signal generated by the nuclear spin of the target part of the object being detected, thereby obtaining the initial scanning range of the target part and completing the initial positioning of the automatic scanning. Optionally, the processor can also adjust according to the initial scanning range, for example, by adjusting the relative position of the object being detected and the center of the magnetic resonance scanner, or by adjusting the scanning parameters of the first receiving coil to adjust parameters such as the field of view of the scanning area.

[0073] The second receiving coil 42 is used to receive the second magnetic resonance signal generated by the nuclear spin of the target part of the object being detected, so as to obtain a medical image of the target part.

[0074] In this embodiment, the second receiving coil is composed of multiple sets of parallelogram coils. The processor can control the movement of each second receiving coil, and the second receiving coil can extend and retract laterally and / or longitudinally. Optionally, a distance sensor can be provided at the node of the second receiving coil to measure the distance between the node of the second receiving coil and the surface of the target area. Optionally, the processor can also extend and retract the height dimension of the second receiving coil based on the received distance to obtain a more accurate second magnetic resonance signal, that is, to obtain a more accurate medical image of the target area.

[0075] In this embodiment, the processor determines the initial scanning range of the target area of ​​the detection object based on the first receiving coil, adjusts the position of the detection object according to the initial scanning range so that the detection object moves to the center position of the scanner, and then determines the medical image of the target area of ​​the detection object based on the second receiving coil. The number of receiving coils can be increased or decreased depending on the size of the target area; the coverage of the receiving coils can be adjusted by stretching or contracting depending on the size of the imaging area corresponding to the target area; and the position of the receiving coils can be moved horizontally according to the center position of the target area to align the center of the receiving coils with the center of the target area. This eliminates the need for manual placement and adjustment of the coils, ensuring accurate magnetic resonance scanning results while improving the efficiency of the magnetic resonance scanning process.

[0076] To ensure the accuracy of the distance between the target area and the center of the magnetic resonance scanner, in one embodiment, such as Figure 3 As shown, a top patch 31 is set at a preset position on the magnetic resonance scanning bed 3.

[0077] In this embodiment, a head patch 31 is provided at a fixed position on the magnetic resonance scanning bed 3. When the subject is lying on the magnetic resonance scanning bed 3, it is necessary to ensure that the head and the head patch are adjacent to each other so that the relative distance between the head of the subject and the center of the magnetic resonance scanner is basically the same as the distance between the head patch and the center of the magnetic resonance scanner.

[0078] In this embodiment, the top patch 31 is used as a fixed reference position to determine the relative distance between the target part of the object being detected and the center of the magnetic resonance scanner. This distance is relatively accurate, so the push distance of the target part is also relatively accurate, thereby improving the accuracy of the magnetic resonance system's scanning positioning.

[0079] The second receiving coil communicates with the processor via a coil interface. In one embodiment, such as... Figure 4 As shown, the magnetic resonance scanning bed 3 is provided with a coil interface 43 for communicating with the second receiving coil 42 on its side wall.

[0080] Processor 1 is used to control the second receiving coil 42 to retract and / or move based on coil interface 43.

[0081] In this embodiment, the second receiving coil 42 can move along the coil slide rail where the coil interface 43 is located, and communicates with the processor through the coil interface 43 to obtain the nuclear resonance signal generated by the scanned target site. Optionally, the second receiving coil 42 can extend and retract laterally and / or longitudinally based on the coil slide rail where the coil interface 43 is located to obtain a more accurate nuclear resonance signal and generate a more accurate medical image of the target site.

[0082] In this embodiment, a coil interface for communication with the second receiving coil is provided on the side wall of the magnetic resonance scanning bed, which facilitates communication between the processor and the second receiving coil. Furthermore, the second receiving coil can be retracted laterally and longitudinally through the coil slide rail where the coil interface is located, making the acquired nuclear resonance signal more accurate and improving the efficiency of scanning the target area.

[0083] The technical solutions of this application and how they solve the aforementioned technical problems will be described in detail below through embodiments and in conjunction with the accompanying drawings. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. It should be noted that this application... Figures 5-14 The magnetic resonance scanning method provided in this embodiment is executed by a processor in a magnetic resonance system, or by a magnetic resonance scanning device. This magnetic resonance scanning device can be part or all of the processor through software, hardware, or a combination of both. In the following method embodiments, the execution entity is always described using a processor as an example.

[0084] In one embodiment, such as Figure 5 As shown, a magnetic resonance imaging (MRI) scanning method is provided, which involves a processor determining the distance from the target area of ​​the object to the center of the MRI scanner based on the physiological characteristics of the object. Based on this distance, the processor controls the MRI scanning bed to move the object so that the target area is moved to the position corresponding to the center of the MRI scanner. A receiving coil receives the MRI signal generated by the nuclear spin of the target area, thereby reconstructing the MRI signal to obtain a medical image of the target area. The method includes the following steps:

[0085] S201. Based on the physiological characteristics of the subject, determine the distance from the target area of ​​the subject to the center of the magnetic resonance scanner.

[0086] Among them, physiological characteristic information can be the height information of the test subject, as well as the height ratio information of various target parts of the test subject. Target parts include the pituitary gland of the head, lumbar spine, and knees of the test subject.

[0087] In this embodiment, the processor can acquire the physiological characteristic information of the target object through input or by scanning the physiological characteristic information of the target object. After acquiring the physiological characteristic information of the target object, optionally, taking the height ratio of each target part as an example, the distance from the target part lying on the magnetic resonance scanning bed to the magnetic resonance scanner is determined based on the height ratio of the target part. Optionally, the processor can determine the distance A from the target part to the top of the head based on the height ratio of the target part. The processor can also determine the distance B from the top of the target object to the center of the magnetic resonance scanner based on a fixed reference object. Based on distance A and distance B, the distance from the target part to the center of the magnetic resonance scanner can be determined. This embodiment does not limit this.

[0088] S202. Based on the distance, control the movement of the magnetic resonance scanning bed carrying the object to be detected, so that the target part moves to the position corresponding to the center of the magnetic resonance scanner.

[0089] In this embodiment, after determining the distance from the target part of the object to the center of the magnetic resonance scanner, the processor determines the pushing distance of the magnetic resonance scanning bed. Based on the pushing distance, the processor controls the magnetic resonance scanning bed to move a corresponding distance so that the target part moves to the position corresponding to the center of the magnetic resonance scanner.

[0090] S203. Receive magnetic resonance signals generated by nuclear spins at the target location using a receiving coil; the receiving coil includes multiple nodes, and the relative positions of at least two adjacent nodes are adjustable.

[0091] In this embodiment, the processor acquires the magnetic resonance signal generated by the target location using a receiving coil. Optionally, the processor can acquire the magnetic resonance signal generated by the receiving coil by setting a coil interface that communicates with the receiving coil. Furthermore, the processor can control the movement of the receiving coil through the coil interface. The receiving coil includes multiple nodes, such as... Figure 6 As shown, the processor can adjust the position of each node so that the distance and relative position between the receiving coil and the target part are more in line with the preset standard.

[0092] S204. Reconstruct the magnetic resonance signal to obtain a medical image of the target area.

[0093] In this embodiment, the processor reconstructs a medical image of the target area based on the received magnetic resonance signal. Optionally, the processor may first determine the initial scanning range of the target area, that is, first determine the regional contour and other information of the target area, and then make fine adjustments to the position of the receiving coil based on the initial scanning range of the target area. Based on the adjusted receiving coil, the processor then performs a magnetic resonance scan on the target area, and reconstructs a medical image of the target area based on the acquired second magnetic resonance signal.

[0094] In the aforementioned magnetic resonance imaging (MRI) scanning method, the processor determines the distance from the target area of ​​the subject to the center of the MRI scanner based on the physiological characteristics of the subject. Based on this distance, it controls the movement of the MRI scanning bed carrying the subject, moving the target area to the position corresponding to the center of the MRI scanner. The receiving coil then receives the MRI signal generated by the nuclear spin of the target area, reconstructing the MRI signal to obtain a medical image of the target area. The receiving coil includes multiple nodes, and the relative positions of at least two adjacent nodes are adjustable to change the distance between the receiving coil and the target area. In this method, laser positioning is not used. Before entering the scanning chamber, the processor preliminarily calculates the distance between the target area and the center of the MRI scanner based on the physiological characteristics and target area information of the subject, automatically scanning and positioning the receiving coil for the target area. This eliminates the need for manual coil placement and adjustment, improving the efficiency of MRI scanning while ensuring accurate results.

[0095] In one embodiment, when the processor scans the target area based on the receiving coil, such as... Figure 7 As shown, the receiving coil includes a first receiving coil and a second receiving coil. The above-mentioned reconstructed magnetic resonance signal obtains a medical image of the target area, including:

[0096] S301. Determine the initial scanning range of the target area based on the first magnetic resonance signal from the first receiving coil.

[0097] The first receiving coil is a coil located inside the magnetic resonance scanner.

[0098] In this embodiment, the processor acquires a first magnetic resonance signal generated by the target region using the first receiving coil, and reconstructs and determines the initial scanning range of the target region based on the first magnetic resonance signal. The initial scanning range is used to represent information such as the regional contour of the target region. The signal-to-noise ratio of the first receiving coil is greater than that of the second receiving coil, and the acquired image resolution is lower.

[0099] S302. Based on the target location and the initial scanning range of the target location, perform magnetic resonance scanning on the target location using the second receiving coil to obtain a medical image of the target location.

[0100] The second receiving coil is a coil with a low signal-to-noise ratio, meaning that a clearer medical image of the target area can be obtained through the second receiving coil.

[0101] In this embodiment, after determining the initial scanning range of the target, the processor uses a second receiving coil to receive the second magnetic resonance signal obtained after the target part is excited by the transmitted pulse, based on the initial scanning range of the target part and the position of the target part. Based on the acquired second magnetic resonance signal, a medical image of the target part is reconstructed.

[0102] In this embodiment, the processor acquires the initial scanning range of the target area based on the first receiving coil, and determines the medical image of the target area based on the second receiving coil according to the initial scanning range. The second scan results in a more accurate medical image of the target area.

[0103] The processor can determine the distance from the target area to the center of the magnetic resonance scanner based on the head patch of the magnetic resonance scanning bed and the physiological characteristics of the subject. In one embodiment, such as Figure 8 As shown, the physiological characteristic information includes the height of the subject and the height percentage of multiple candidate body parts; the determination of the distance from the target body part to the center of the magnetic resonance scanner based on the physiological characteristic information of the subject includes:

[0104] S401. Determine the height percentage corresponding to the target body part based on the height percentage of each candidate body part.

[0105] The candidate body parts include identifiable areas such as the neck, waist, abdomen, and knees. Taking the waist as an example, the waist-to-height ratio refers to the ratio of the distance from the top of the head to the midpoint of the waist to the total height of the subject. The height ratio of each candidate body part can be obtained through input from the subject or through scanning; this embodiment does not impose any restrictions on this. Figure 8 As shown,

[0106] In this embodiment, the target region is typically a portion of the candidate regions, such as the neck. The target region can be the pituitary gland. The height ratio of the pituitary gland is determined based on the proportion of the neck to the top of the head and the position of the pituitary gland therefrom. See details for further reference. Figure 9 As shown.

[0107] Optionally, the processor can determine the distance from the candidate part to the top of the head based on the height ratio of the candidate part, thereby determining the height ratio of the target part, i.e., determining the distance from the target part to the top of the head. Assuming the measured human height is H (head), the distance from the neck to the top of the head is NH (neck to head), the distance from the waist to the top of the head is WH (waist to head), and the distance from the knee to the top of the head is KH (knee to head).

[0108] If the scanned area is the pituitary gland in the head, and the normal ratio of the pituitary gland to the head and neck is known to be t1, then the distance from the pituitary gland to the top of the head is M1 = t1 * NH. If the scanned area is the cervical spine, and the normal ratio of the cervical spine to the head and neck is known to be t2, then the distance from the cervical spine to the top of the head is M2 = t2 * NH. If the scanned area is the lumbar spine, and the normal ratio of the lumbar spine to the length of the spine (WH-NH) is known to be t3, then the distance from the lumbar spine to the top of the head is M3 = t3 * (WH-NH) + NH. If the scanned area is the knee joint, since the overall length of the knee joint is not large, the distance from the knee to the top of the head can be approximated as M4 = KN.

[0109] S402. Determine the distance from the target part to the center of the magnetic resonance scanner based on the height ratio of the target part and the preset first distance; the first distance is the distance from the top patch of the magnetic resonance scanning bed where the test subject is located to the center of the magnetic resonance scanner.

[0110] In this embodiment, optionally, after obtaining the height percentage of the target body part, in one embodiment, such as Figure 10 As shown, the above method of determining the distance from the target body part to the center of the magnetic resonance scanner based on the height ratio of the target body part and a preset first distance includes:

[0111] S501. Determine the second distance based on the height ratio of the target area, the height of the subject being tested, and the position of the patch on the top of the head; the second distance is the distance from the target area to the patch on the top of the head.

[0112] In this embodiment, the processor can determine the distance from the target part to the top of the head, that is, the distance from the target part to the top of the head patch, based on the height ratio of the target part, the height of the detected object, and the position of the patch on the top of the head.

[0113] S502. The sum of the second distance and the first distance is determined as the distance from the target part to the center of the magnetic resonance scanner.

[0114] In this embodiment, the processor determines the distance from the target area to the center of the magnetic resonance scanner as the sum of the distance from the target area to the patch on the top of the head and the distance from the patch on the top of the head to the center of the magnetic resonance scanner. This embodiment does not impose any restrictions on this.

[0115] In this embodiment, the top patch is used as a fixed reference position to determine the relative distance between the target part of the object being detected and the center of the magnetic resonance scanner. The top patch is a fixed position, which can also be used to determine the insertion distance for objects of different heights. The determined distance is more accurate, thus improving the accuracy of the magnetic resonance system's scanning positioning.

[0116] The processor determines a medical image of the target site based on the second receiving coil, as in one embodiment, such as... Figure 11 As shown, the above-mentioned method involves performing magnetic resonance scanning on the target area based on the target area and the initial scanning range of the target area using a second receiving coil to obtain a medical image of the target area, including:

[0117] S601. Determine the second receiving coil to be moved based on the field of view of the initial scanning range of the target part.

[0118] In this embodiment, the processor can determine the field of view based on the initial scanning range, and then determine the field of view based on the target part and the initial scanning range, and determine the required number of second receiving coils, that is, determine at least one second receiving coil to be moved.

[0119] S602. Determine the scanning area of ​​the target part based on the scanning contour of the initial scanning range of the target part.

[0120] In this embodiment, the processor can determine the scanning contour of the target part based on the initial scanning range obtained by the first receiving coil, and determine the scanning area of ​​the target part based on the scanning contour.

[0121] S603. Move the second receiving coil to be moved to the scanning area according to the scanning area.

[0122] In this embodiment, the processor moves at least one second receiving coil to the vicinity of the scanning area to control the second receiving coil to scan the target area. Optionally, the processor can move the second receiving coils to the scanning area sequentially or in batches; this embodiment does not limit this.

[0123] S604. The second receiving coil after the movement is used to receive the second magnetic resonance signal generated by the nuclear spin of the target area, and a medical image of the target area is obtained based on the second magnetic resonance signal.

[0124] In this embodiment, after moving at least one second receiving coil to the scanning area, the processor receives a second magnetic resonance signal generated by the nuclear spin of the target region based on the second receiving coil, and reconstructs a medical image of the target region based on the received second magnetic resonance signal. Before scanning, the processor can also adjust the coverage area of ​​the second receiving coil, for example, by stretching or contracting the second receiving coil laterally or longitudinally, or by adjusting the height of the second receiving coil relative to the target region. This embodiment does not limit this.

[0125] In this embodiment, the processor determines the scanning area of ​​the target part based on the scanning profile determined by the first receiving coil, thereby moving the required number of second receiving coils to the scanning area to scan the target part. No manual intervention or assistance is required throughout the process, which improves the efficiency of magnetic resonance scanning of the target part.

[0126] In one embodiment, when the processor moves the second receiving coil, as... Figure 12 As shown, the above-described method of moving the second receiving coil to the scanning area according to the scanning area includes:

[0127] S701, Obtain the center position of the scanned area.

[0128] In this embodiment, the processor determines the center of the scanning area based on the scanning area determined by the first receiving coil. Optionally, the processor can obtain the center position of each layer as an object.

[0129] S702. Determine the degree of horizontal contraction of the second receiving coil to be moved based on the center position.

[0130] In this embodiment, the processor needs to determine the positional consistency between the second receiving coil and the scanning area. Optionally, after determining the center position of the scanning area, the processor can adjust the horizontal contraction of the second receiving coil to be moved based on the center position. This can be achieved by extending or contracting the second receiving coil to make the center position of the coverage area of ​​the second receiving coil consistent with the center position of the scanning area. This embodiment does not limit this aspect.

[0131] S703. Determine the degree of vertical contraction of the second receiving coil to be moved based on the image quality of the positioning image in the scanning area.

[0132] The image quality of the localization image in the scanned area can include parameters such as the signal-to-noise ratio, contrast, and sharpness of the localization image.

[0133] In this embodiment, the processor can adjust the second receiving coil to be moved in the vertical direction based on the image quality of the positioning image in the scanning area, that is, adjust the height distance between the second receiving coil to be moved and the target part. Optionally, the processor can also set a distance sensor at the node of the second receiving coil. After the second receiving coil moves to the scanning area, the processor obtains the height distance between the second receiving coil and the target part based on the distance sensor, thereby determining whether the second receiving coil needs to be raised or lowered in the vertical direction.

[0134] Optionally, the processor can also determine the density of coil elements contained in the second receiving coil based on the image quality of the positioning image of the scanned area.

[0135] In magnetic resonance imaging (MRI), gradient nonlinearity and magnetic field inhomogeneity are major sources of artifacts. The presence of gradient nonlinearity often results in the precession frequency of hydrogen atoms outside the linear gradient region potentially being the same as that at a point within the linear region. This manifests as a striped artifact along the phase encoding direction in the image, typically appearing in large field-of-view (FOV) scanning scenarios such as spinal scans. In this embodiment, the coil elements contained in the second receiving coil are set to a first density at the center of the field of view (i.e., the center of the scanning area); and a second density is set at the edge of the field of view (i.e., the center of the scanning area), with the first density being greater than the second density. This non-uniform setting suppresses the striped artifact.

[0136] Optionally, after the second receiving coil uniformly covers the initial scanning range of the target area, the processor receives the positioning image of the scanning area and performs a quality assessment on the positioning image of the scanning area. If the quality of the positioning image of the scanning area does not meet a set threshold, the scanning sequence is adjusted. For example, such as... Figure 13 As shown, signal acquisition is not performed at the echo location, but rather shifted forward or backward in the echo time. The acquired signal primarily includes signals from regions with uniform magnetic fields and linear gradients. Signals from regions with non-uniform magnetic fields and non-linear gradients exhibit dephasing and weak signal strength due to the spin accumulation phase not returning to zero, thus effectively eliminating artifacts. As shown in the figure below, before adjusting the echo signal acquisition timing, echo Echo1-4 is affected by the non-uniformity of the gradient field. Shifting the signal acquisition timing forward allows the echo to be acquired in the linear gradient region.

[0137] S704. Based on the horizontal and vertical contraction degrees of the second receiving coil to be moved, move the second receiving coil to be moved to the scanning area.

[0138] In this embodiment, the processor shrinks the second receiving coil to be moved horizontally and vertically according to the determined degree of shrinkage of the second receiving coil in the horizontal direction and vertical direction, thereby obtaining a shrunken second receiving coil covering the scanning area.

[0139] In this embodiment, the processor can adjust the horizontal contraction of the second receiving coil according to the center position of the scanning area, and adjust the vertical contraction of the second receiving coil according to the image quality of the positioning image of the scanning area, effectively ensuring the accuracy of the medical image of the determined target area.

[0140] To better illustrate the above methods, such as Figure 14 As shown, this embodiment provides a magnetic resonance scanning method, specifically including:

[0141] S101. Determine the height percentage corresponding to the target body part based on the height percentage of each candidate body part.

[0142] S102. Determine the second distance based on the height ratio of the target area, the height of the subject being tested, and the position of the patch on the top of the head;

[0143] S103. The sum of the second distance and the distance from the patch on the top of the magnetic resonance scanning bed where the object is located to the center of the magnetic resonance scanner is determined as the distance from the target part to the center of the magnetic resonance scanner.

[0144] S104. Based on the distance, control the movement of the magnetic resonance scanning bed carrying the object to be detected, so that the target part moves to the position corresponding to the center of the magnetic resonance scanner;

[0145] S105. Receive magnetic resonance signals generated by nuclear spin at the target location using a receiving coil;

[0146] S106. Determine the initial scanning range of the target region based on the first magnetic resonance signal from the first receiving coil;

[0147] S107. Determine the second receiving coil to be moved based on the field of view of the initial scanning range of the target part;

[0148] S108. Determine the scanning area of ​​the target part based on the scanning contour of the initial scanning range of the target part;

[0149] S109. Obtain the center position of the scanned area;

[0150] S110. Determine the degree of horizontal contraction of the second receiving coil to be moved based on the center position;

[0151] S111. Determine the degree of vertical contraction of the second receiving coil to be moved based on the image quality of the positioning image in the scanning area.

[0152] S112. Based on the horizontal and vertical contraction degrees of the second receiving coil to be moved, move the second receiving coil to be moved to the scanning area;

[0153] S113. The second receiving coil after the movement is used to receive the second magnetic resonance signal generated by the nuclear spin of the target area, and a medical image of the target area is obtained based on the second magnetic resonance signal.

[0154] In this embodiment, laser positioning is not used. Before entering the scanning chamber, the processor calculates the distance between the target area and the center of the magnetic resonance scanner in the magnetic resonance scanning system based on the physiological characteristics and target area information of the object being detected. It then automatically scans and positions the receiving coils of the target area. The number of receiving coils can be increased or decreased depending on the size of the target area; the coverage area of ​​the receiving coils can be adjusted by stretching or contracting based on the field of view of the target area; and the position of the receiving coils can be moved horizontally to align the center of the receiving coils with the center of the target area, etc. This eliminates the need for manual placement and adjustment of the coils, ensuring accurate magnetic resonance scanning results while improving the efficiency of the magnetic resonance scanning process.

[0155] The magnetic resonance scanning method provided in the above embodiments has a similar implementation principle and technical effect to the above method embodiments, and will not be described again here.

[0156] It should be understood that, although Figure 5-14 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figure 5-14 At least some of the steps in the process may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but may be executed at different times. The execution order of these steps or stages is not necessarily sequential, but may be executed in turn or alternately with other steps or at least some of the steps or stages in other steps.

[0157] In one embodiment, such as Figure 15 As shown, a magnetic resonance scanning device is provided, including: a determining module 01, a control module 02, a receiving module 03, and an imaging module 04, wherein:

[0158] The determination module 01 is used to determine the distance from the target part of the object to the center of the magnetic resonance scanner based on the physiological characteristics information of the object being detected.

[0159] Control module 02 is used to control the movement of the magnetic resonance scanning bed carrying the object to be detected according to the distance, so that the target part is moved to the position corresponding to the center of the magnetic resonance scanner;

[0160] The receiving module 03 is used to receive the magnetic resonance signal generated by the nuclear spin of the target part using a receiving coil; the receiving coil includes multiple nodes, and the relative positions of at least two adjacent nodes are adjustable;

[0161] Imaging module 04 is used to reconstruct magnetic resonance signals to obtain medical images of the target area.

[0162] In one embodiment, the receiving coil includes a first receiving coil and a second receiving coil. The imaging module 04 is used to determine the initial scanning range of the target site based on the first magnetic resonance signal from the first receiving coil; and to perform magnetic resonance scanning on the target site based on the second receiving coil according to the target site and the initial scanning range of the target site to obtain a medical image of the target site.

[0163] In one embodiment, the physiological characteristic information includes the height of the subject being tested and the height percentage of multiple candidate body parts; the determining module 01 is used to determine the height percentage of the target body part based on the height percentage of each candidate body part; and to determine the distance from the target body part to the center of the magnetic resonance scanner based on the height percentage of the target body part and a preset first distance; the first distance is the distance from the patch on the top of the magnetic resonance scanning bed where the subject is located to the center of the magnetic resonance scanner.

[0164] In one embodiment, the determining module 01 is used to determine a second distance based on the height ratio of the target part, the height of the object being detected, and the position of the patch on the top of the head; the second distance is the distance from the target part to the patch on the top of the head; the sum of the second distance and the first distance is determined as the distance from the target part to the center of the magnetic resonance scanner.

[0165] In one embodiment, the imaging module 04 is configured to determine the second receiving coil to be moved based on the field of view of the initial scanning range of the target part; determine the scanning area of ​​the target part based on the scanning profile of the initial scanning range of the target part; move the second receiving coil to be moved to the scanning area based on the scanning area; receive the second magnetic resonance signal generated by the nuclear spin of the target part using the moved second receiving coil; and obtain a medical image of the target part based on the second magnetic resonance signal.

[0166] In one embodiment, the imaging module 04 is configured to acquire the center position of the scanning area; determine the horizontal contraction degree of the second receiving coil to be moved based on the center position; determine the vertical contraction degree of the second receiving coil to be moved based on the image quality of the positioning image of the scanning area; and move the second receiving coil to be moved to the scanning area based on the horizontal and vertical contraction degrees of the second receiving coil to be moved.

[0167] Optionally, in one embodiment, such as Figure 16 As shown, the above-mentioned device also includes a feedback module 05. The feedback module 05 is used to receive the positioning image of the scanning area after the initial scanning range of the second receiving coil uniformly covers the target area, and to evaluate the quality of the positioning image of the scanning area. When the quality of the positioning image of the scanning area does not meet the set threshold, a feedback signal is generated and the feedback signal is sent to the control module 02.

[0168] Control module 02 is used to receive feedback signals and adjust the scanning sequence accordingly.

[0169] Specific limitations regarding the magnetic resonance scanning device can be found in the limitations of the magnetic resonance scanning method above, and will not be repeated here. Each module in the aforementioned magnetic resonance scanning device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in hardware or independently of the processor in the computer device, or stored in software in the memory of the computer device, so that the processor can call and execute the operations corresponding to each module.

[0170] In one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows: Figure 17 As shown, the computer device includes a processor, memory, communication interface, display screen, and input devices connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, carrier networks, NFC (Near Field Communication), or other technologies. When executed by the processor, the computer program implements a magnetic resonance scanning method. The display screen can be an LCD screen or an e-ink screen. The input devices can be a touch layer covering the display screen, buttons, a trackball, or a touchpad on the computer device's casing, or an external keyboard, touchpad, or mouse.

[0171] Those skilled in the art will understand that Figure 17 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0172] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to perform the following steps:

[0173] Based on the physiological characteristics of the subject, determine the distance from the target area of ​​the subject to the center of the magnetic resonance scanner;

[0174] Based on the distance, the magnetic resonance scanning bed is controlled to move the object being detected so that the target part is moved to the position corresponding to the center of the magnetic resonance scanner.

[0175] The receiving coil is used to receive the magnetic resonance signal generated by the nuclear spin of the target region; the receiving coil includes multiple nodes, and the relative positions of at least two adjacent nodes are adjustable;

[0176] Reconstructing magnetic resonance signals yields medical images of the target area.

[0177] The computer device provided in the above embodiments has similar implementation principles and technical effects to the above method embodiments, and will not be described again here.

[0178] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon, the computer program performing the following steps when executed by a processor:

[0179] Based on the physiological characteristics of the subject, determine the distance from the target area of ​​the subject to the center of the magnetic resonance scanner;

[0180] Based on the distance, the magnetic resonance scanning bed is controlled to move the object being detected so that the target part is moved to the position corresponding to the center of the magnetic resonance scanner.

[0181] The receiving coil is used to receive the magnetic resonance signal generated by the nuclear spin of the target region; the receiving coil includes multiple nodes, and the relative positions of at least two adjacent nodes are adjustable;

[0182] Reconstructing magnetic resonance signals yields medical images of the target area.

[0183] The computer-readable storage medium provided in the above embodiments has similar implementation principles and technical effects to the above method embodiments, and will not be described again here.

[0184] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0185] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0186] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A magnetic resonance scanning method, characterized in that, The method includes: Based on the physiological characteristics of the object being tested, the distance from the target area of ​​the object to the center of the magnetic resonance scanner is determined; Based on the distance, the magnetic resonance scanning bed is controlled to move the object to be detected, so that the target part is moved to the position corresponding to the center of the magnetic resonance scanner; The magnetic resonance signal generated by the nuclear spin of the target region is received using a receiving coil. The receiving coil includes a first receiving coil and a second receiving coil. The first receiving coil is disposed inside the magnetic resonance scanner and is a transceiver integrated coil. The second receiving coil includes multiple nodes, and the relative positions of at least two adjacent nodes are adjustable. The second receiving coil is movably disposed at the end of the magnetic resonance scanning bed away from the magnetic resonance scanner. A distance sensor is disposed at the node of the second receiving coil to measure the distance between the node of the second receiving coil and the surface of the target region. Based on the first magnetic resonance signal from the first receiving coil, the initial scanning range of the target region is determined; Based on the target location and the initial scanning range of the target location, the scanning area of ​​the target location is determined; According to the scanning area, the second receiving coil is moved to the scanning area, and the movement of the second receiving coil includes adjusting the degree of contraction in the horizontal direction or the degree of contraction in the vertical direction of the second receiving coil; The second receiving coil, after being moved, receives the second magnetic resonance signal generated by the nuclear spin of the target site, and a medical image of the target site is obtained based on the second magnetic resonance signal.

2. The method according to claim 1, characterized in that, The physiological characteristic information includes the height of the subject and the height percentage of multiple candidate body parts; determining the distance from the target body part of the subject to the center of the magnetic resonance scanner based on the physiological characteristic information of the subject includes: Based on the height percentage of each candidate body part, determine the height percentage corresponding to the target body part; Based on the height ratio of the target body part and a preset first distance, the distance from the target body part to the center of the magnetic resonance scanner is determined; the first distance is the distance from the top patch of the magnetic resonance scanning bed where the test subject is located to the center of the magnetic resonance scanner.

3. The method according to claim 2, characterized in that, The step of determining the distance from the target body part to the center of the magnetic resonance scanner based on the height ratio of the target body part and a preset first distance includes: A second distance is determined based on the height ratio of the target area, the height of the test subject, and the position of the head patch; the second distance is the distance from the target area to the head patch. The sum of the second distance and the first distance is determined as the distance from the target area to the center of the magnetic resonance scanner.

4. The method according to claim 1, characterized in that, Determining the scanning area of ​​the target part based on the target part and the initial scanning range of the target part includes: The second receiving coil to be moved is determined based on the field of view of the initial scanning range of the target location; The scanning area of ​​the target part is determined based on the scanning contour of the initial scanning range of the target part.

5. The method according to claim 1, characterized in that, Moving the second receiving coil to the scanning area according to the scanning area includes: Obtain the center position of the scanned area; Based on the center position, determine the degree of horizontal contraction of the second receiving coil to be moved; The degree of vertical contraction of the second receiving coil to be moved is determined based on the image quality of the positioning image in the scanning area. Based on the horizontal and vertical contraction degrees of the second receiving coil to be moved, the second receiving coil to be moved is moved to the scanning area.

6. The method according to claim 1, characterized in that, The resolution of the image corresponding to the first magnetic resonance signal received by the first receiving coil is lower than the resolution of the image corresponding to the second magnetic resonance signal received by the second receiving coil.

7. A magnetic resonance system, characterized in that, The system includes: a processor, a magnetic resonance scanner, a magnetic resonance scanning bed, and a receiving coil; The processor is configured to execute the magnetic resonance scanning method according to any one of claims 1-6 when the object being detected is on a magnetic resonance scanning bed.

8. The system according to claim 7, characterized in that, A head patch is placed at a preset position on the magnetic resonance scanning bed.

9. The system according to claim 7, characterized in that, The magnetic resonance scanning bed is provided with a coil interface for communicating with the second receiving coil on its side wall; The processor is configured to control the second receiving coil to retract and / or move based on the coil interface.

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