Magnetic resonance bed control method and device, computer device and storage medium

Abstract

This application relates to a method, apparatus, computer equipment, and storage medium for controlling a magnetic resonance imaging (MRI) bed. The method includes: determining a bed movement strategy based on a target body part of the patient being scanned, wherein the bed movement strategy includes setting a corresponding safe movement speed for each position of the target body part during bed movement; generating bed control commands based on the bed movement strategy; and controlling the bed movement system to adjust the bed movement speed according to the bed control commands, so that the bed movement speed does not exceed the safe movement speed. This method can not only reduce the patient's discomfort during MRI scanning but also ensure the scanning efficiency of the MRI scan.

Description

Technical Field

[0001] This application relates to the field of magnetic resonance system technology, and in particular to a magnetic resonance imaging (MRI) bed control method, device, computer equipment, and storage medium. Background Technology

[0002] In high-field or ultra-high-field magnetic resonance imaging (MRI) systems, when a patient needs to undergo an MRI scan, the patient's bed will move through the magnet scanning area at a default speed to complete the imaging scan.

[0003] However, magnetic field gradients exist in magnetic resonance imaging (MRI) systems. Due to the magnetic field gradients, the static magnetic field is not uniform. When patients move rapidly in the non-uniform static magnetic field of the MRI system, they may experience discomfort symptoms, such as dizziness, nausea, and a metallic taste in their mouth.

[0004] Therefore, in order to reduce patient discomfort during the scanning process, there is an urgent need for a method to control bed movement during magnetic resonance imaging (MRI) scans. Summary of the Invention

[0005] Therefore, it is necessary to provide a magnetic resonance imaging (MRI) bed control method, device, computer equipment, and storage medium to address the aforementioned technical problems.

[0006] A method for controlling a magnetic resonance imaging (MRI) bed, the method comprising:

[0007] Based on the target body part of the person being scanned, a bed movement strategy is determined, which includes setting a corresponding movement speed for each position of the target body part during the bed movement process;

[0008] Generate bed control instructions based on the described bed movement strategy;

[0009] The bed movement system is controlled according to the bed control command to adjust the bed movement speed so that the bed movement speed does not exceed the safe movement speed.

[0010] In one embodiment, the method further includes:

[0011] Obtain information on the spatial distribution of the static magnetic field gradient and the preset limit of the magnetic field change rate;

[0012] During the movement of the hospital bed, the position sequence of any body part of the sample object is collected as the hospital bed moves; the position sequence includes the sampling point positions of the body part sampled at a preset time period;

[0013] Based on the gradient spatial distribution information of the static magnetic field and the three-dimensional spatial structure of the body part at each position in the position sequence, the maximum magnetic field gradient corresponding to each three-dimensional spatial structure is determined.

[0014] Based on the maximum magnetic field gradient and the limit of the magnetic field change rate, the bed movement speed corresponding to the body part in each position interval of the three-dimensional spatial structure is determined, and the bed movement strategy is obtained.

[0015] In one embodiment, based on the gradient spatial distribution information of the static magnetic field and the three-dimensional spatial structure of the body part at each position in the position sequence, the maximum magnetic field gradient corresponding to each of the three-dimensional spatial structures is determined:

[0016] For any of the body parts corresponding to the position sequence, the three-dimensional spatial structure of the body part at each position is determined based on the contour information of each dimension at each position in the position sequence.

[0017] A predetermined number of location points are collected within the spatial range contained in each of the three-dimensional spatial structures.

[0018] Based on the location of each of the three-dimensional spatial structures and the gradient spatial distribution information of the static magnetic field, the maximum magnetic field gradient corresponding to the three-dimensional spatial structure at each location is determined.

[0019] In one embodiment, determining the bed movement speed corresponding to the body part within the position interval of each of the three-dimensional spatial structures based on the maximum magnetic field gradient and the magnetic field change rate limit, and obtaining the bed movement strategy, includes:

[0020] Based on the magnetic field change rate limit and the maximum magnetic field gradient corresponding to each of the three-dimensional spatial structures, a division operation is performed to determine the bed movement speed within the position interval of each of the three-dimensional spatial structures of the body part.

[0021] The bed movement strategy is determined based on the bed movement speed corresponding to the position interval of each of the three-dimensional spatial structures of the body parts.

[0022] In one embodiment, if the number of target body parts is multiple, the method further includes:

[0023] Compare the bed movement speeds within the same location interval in multiple bed movement strategies corresponding to multiple target body parts, determine the minimum movement speed within each location interval, and obtain the fused bed movement strategy.

[0024] The step of generating bed control commands based on the bed movement strategy to control the bed movement system to adjust the bed movement speed includes:

[0025] Based on the fused bed movement strategy, a bed control command is generated to control the bed movement system to adjust the bed movement speed.

[0026] In one embodiment, adjusting the bed movement speed according to the bed control command by controlling the bed movement system includes:

[0027] Get the current location of the hospital bed;

[0028] Based on the current location of the hospital bed, the corresponding target hospital bed movement speed is determined in the hospital bed movement strategy;

[0029] Based on the target bed movement speed, a bed control command is generated to control the bed movement system to move at the target bed movement speed.

[0030] In one embodiment, adjusting the bed movement speed according to the bed control command by controlling the bed movement system includes:

[0031] Obtain the current movement speed and location of the hospital bed;

[0032] Based on the current location of the hospital bed, the corresponding target hospital bed movement speed is determined in the hospital bed movement strategy;

[0033] Compare the target bed's moving speed with the current bed's moving speed, and generate bed control commands based on the comparison results;

[0034] Based on the bed control command, the bed movement system is controlled to adjust the current bed movement speed.

[0035] A magnetic resonance imaging (MRI) bed control device, the device comprising:

[0036] The determination module is used to determine the bed movement strategy based on the target body part of the scanned person. The bed movement strategy includes the safe movement speed corresponding to each position of the target body part during the bed movement.

[0037] The generation module is used to generate bed control instructions based on the bed movement strategy;

[0038] The control module is used to control the bed moving system to adjust the bed moving speed according to the bed control command, so that the bed moving speed does not exceed the safe moving speed.

[0039] A computer device includes a memory and a processor, the memory storing a computer program, and the processor executing the computer program performing the following steps:

[0040] Based on the target body part of the person being scanned, a bed movement strategy is determined. The bed movement strategy includes the safe movement speed corresponding to each position of the target body part during the bed movement process.

[0041] Generate bed control instructions based on the described bed movement strategy;

[0042] The bed movement system is controlled according to the bed control command to adjust the bed movement speed so that the bed movement speed does not exceed the safe movement speed.

[0043] A computer-readable storage medium having a computer program stored thereon, the computer program performing the following steps when executed by a processor:

[0044] Based on the target body part of the person being scanned, a bed movement strategy is determined. The bed movement strategy includes the safe movement speed corresponding to each position of the target body part during the bed movement process.

[0045] Generate bed control instructions based on the described bed movement strategy;

[0046] The bed movement system is controlled according to the bed control command to adjust the bed movement speed so that the bed movement speed does not exceed the safe movement speed.

[0047] The aforementioned magnetic resonance imaging (MRI) bed control method, device, computer equipment, and storage medium, wherein the MRI control system determines a bed movement strategy based on the target body part of the patient being scanned, the bed movement strategy including a safe movement speed corresponding to each position of the target body part during bed movement; bed control commands are generated based on the bed movement strategy, and the bed movement system is controlled to adjust the bed movement speed according to the bed control commands so that the bed movement speed does not exceed the safe movement speed. Using this method, the bed movement is controlled based on the safe bed movement speed generated at various points of the target body part of the patient in a non-uniform magnetic field, ensuring that the patient does not experience discomfort. Attached Figure Description

[0048] Figure 1 This is a flowchart illustrating a magnetic resonance imaging (MRI) bed control method in one embodiment;

[0049] Figure 2 This is a flowchart illustrating the steps for determining a bed relocation strategy in one embodiment;

[0050] Figure 3 This is a schematic diagram of the spatial distribution of the static magnetic field gradient in one embodiment;

[0051] Figure 4 This is a flowchart illustrating the step of determining the maximum magnetic field gradient in one embodiment;

[0052] Figure 5 This is a flowchart illustrating the steps for calculating a bed relocation strategy in one embodiment;

[0053] Figure 6 This is a flowchart illustrating the steps for controlling the speed of bed movement in one embodiment;

[0054] Figure 7 This is a flowchart illustrating the steps for controlling the movement of a hospital bed in one embodiment;

[0055] Figure 8 This is a flowchart illustrating the steps for controlling bed movement in another embodiment;

[0056] Figure 9 This is a structural block diagram of a magnetic resonance imaging (MRI) bed control device in one embodiment;

[0057] Figure 10 This is an internal structural diagram of a computer device in one embodiment. Detailed Implementation

[0058] 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.

[0059] First, before introducing the technical solutions of the embodiments of this application in detail, the technical background or evolution of the embodiments of this application will be introduced. Generally, in the field of magnetic resonance imaging (MRI) scanning technology, the current technical background is as follows: due to the non-uniform distribution of the gradient magnetic field in the MRI scanning system, patients may experience various discomfort symptoms during the scanning process as the patient moves with the bed. Based on this background, through long-term model simulation research and development, as well as the collection, demonstration, and verification of experimental data, the applicant discovered that the speed of the MRI bed's movement affects the patient's discomfort symptoms. Adjusting the speed of the bed's movement can improve the severity of the patient's discomfort symptoms. Therefore, how to control the speed of the bed's movement to alleviate the patient's discomfort symptoms has become a pressing problem to be solved. Furthermore, it should be noted that the applicant has devoted considerable creative effort to the discovery of the technical problem in this application and the technical solutions described in the following embodiments.

[0060] In one embodiment, such as Figure 1 As shown, a method for controlling a magnetic resonance imaging (MRI) bed is provided. This embodiment illustrates the application of this method to a terminal of an MRI control system. It is understood that this method can also be applied to a server, or to a system including both a terminal and a server, and is implemented through interaction between the terminal and the server. In this embodiment, the method includes the following steps:

[0061] Step 101: Determine the bed movement strategy based on the target body part of the patient being scanned.

[0062] The bed movement strategy includes setting a corresponding safe movement speed for each position of the target body part during bed movement. This safe movement speed must first meet the scanning requirements to ensure that the person being scanned does not experience discomfort during the scanning process. For example, if the scanning requirements are within the speed range of n to n+m (unit: meters per second), then the safe movement speed is the speed at which a clear image can be formed after the scan, and therefore each safe movement speed falls within the range [n, n+m].

[0063] In practice, due to the non-uniform magnetic field caused by the static magnetic field gradient in the MRI system, certain body parts may experience discomfort during the MRI scan as they move rapidly within this non-uniform magnetic field. These body parts that cause discomfort are designated as target body parts. For example, the patient's head, when moving with the bed, may experience discomfort due to the non-uniform magnetic field. Therefore, by focusing on the target body parts that cause discomfort and ensuring an acceptable bed movement speed for those parts, the patient's discomfort during the MRI scan can be reduced. Different target body parts can correspond to different bed movement strategies. The bed movement strategies for each body part can be pre-configured to control bed movement. These strategies are stored in a bed movement strategy database. The MRI control system determines the corresponding bed movement strategy from this database based on the selected target body part of the patient.

[0064] Optionally, any one or more body parts of the person being scanned can be used as the part of interest (i.e., the target body part) during the magnetic resonance imaging process to determine the bed movement strategy. This application does not limit this.

[0065] Step 102: Generate bed control instructions based on the bed movement strategy.

[0066] In practice, the MRI control system generates bed control commands based on the determined bed movement strategy. These commands are speed control commands corresponding to the safe movement speed of each bed. The speed control commands corresponding to the safe movement speed of each bed can reduce the current bed movement speed exceeding the safe movement speed, or increase or maintain the current bed movement speed below the safe movement speed.

[0067] Step 103: Adjust the bed moving speed of the bed according to the bed control command to ensure that the bed moving speed does not exceed the safe moving speed.

[0068] In practice, after the magnetic resonance control system sends the bed control command to the bed movement system, the bed movement system controls the movement speed of each moving device (e.g., bed movement wheels) in the magnetic resonance according to the speed control requirements in the control command, that is, adjusts the bed movement speed.

[0069] The aforementioned MRI bed control method determines a bed movement strategy based on the target body part of the patient being scanned. This strategy defines a safe movement speed corresponding to each position of the target body part during bed movement. Bed control commands are generated based on this strategy, and the bed movement system is adjusted according to these commands to ensure the movement speed does not exceed the safe speed. This method, by controlling the bed movement speed based on the strategy generated at various points on the target body part within a non-uniform magnetic field, ensures that the patient does not experience discomfort.

[0070] In one embodiment, such as Figure 2 As shown, a bed movement strategy needs to be pre-defined in order to control bed movement. Therefore, the method also includes the following steps:

[0071] Step 201: Obtain the spatial distribution information of the static magnetic field gradient and the preset limit of the magnetic field change rate.

[0072] Within the magnetic scanning region of the magnetic resonance system, there exists a gradient magnetic field, such as... Figure 3 As shown, the spatial distribution of the static magnetic field gradient of a specific geomagnetic resonance system can be obtained through simulation calculations or actual measurements, and the obtained spatial distribution of the static magnetic field gradient can be stored in a database. The limit for the rate of change of the magnetic field is obtained by multiplying the predefined bed movement speed and the spatial gradient of the static magnetic field. This limit is less than or equal to the limit stipulated in the industry or by regulations.

[0073] In practice, the magnetic resonance control system acquires the gradient spatial distribution information of the static magnetic field in the database, as well as the preset magnetic field change rate limit.

[0074] Step 202: During the movement of the hospital bed, collect the position sequence of any body part of the sample subject as the hospital bed moves.

[0075] The position sequence of any body part includes the position information of the corresponding position point of that body part during the entire duration of the magnetic scanning process, according to each preset sampling period.

[0076] In practice, any one of the sample subject's body parts was selected as the target body part to determine the bed movement strategy. During the bed movement, the magnetic resonance imaging control system acquired the position sequence of any one of the sample subject's body parts as the bed moved.

[0077] Step 203: Based on the spatial distribution information of the static magnetic field gradient and the three-dimensional spatial structure of the body parts at each position in the position sequence, determine the maximum magnetic field gradient corresponding to each three-dimensional spatial structure.

[0078] In practice, based on the position information of each sample object in the position sequence of the magnet scanning area (e.g., the position coordinates of each position), the three-dimensional spatial structure of the body part at that position is determined. Based on the three-dimensional spatial structure of the body part and the gradient spatial distribution information of the static magnetic field, the maximum magnetic field gradient (Grad(B0)max) corresponding to the three-dimensional spatial structure at each position is determined.

[0079] Step 204: Based on the maximum magnetic field gradient and the limit of the magnetic field change rate, determine the bed movement speed corresponding to the position interval of the body part in each three-dimensional spatial structure, and obtain the bed movement strategy.

[0080] In practice, based on the maximum magnetic field gradient corresponding to each three-dimensional spatial structure and the obtained limit of magnetic field change rate, the bed movement speed corresponding to the position interval of the body part in each three-dimensional spatial structure is determined, and the bed movement speed in each position interval is used as the bed movement strategy.

[0081] In one embodiment, such as Figure 4 As shown, the specific process for determining the maximum magnetic field gradient in step 203 includes the following steps:

[0082] Step 401: For any body part corresponding to a position sequence, determine the three-dimensional spatial structure of the body part at each position based on the contour information of each dimension at each position in the position sequence.

[0083] In implementation, a bed movement strategy is determined for each body part of the sample object. Therefore, the position sequence corresponding to each body part is processed separately. At each position of each position sequence, contour information of the body part in various dimensions is collected through cameras, radar, real-time scanning images, etc., such as two-dimensional contour information of the body part in the X, Y and Z directions. Based on the contour information of the body part in various dimensions, a three-dimensional spatial model is performed, and the three-dimensional spatial structure of the body part at that position is determined by interpolation and filling methods.

[0084] Step 402: Collect a preset number of location points within the spatial range contained in each three-dimensional spatial structure.

[0085] In practice, for each location in a three-dimensional spatial structure, the magnetic resonance control system collects a sufficient number of location points (also known as location sampling points) within the spatial range of the interior or surface of each three-dimensional spatial structure. The preset number of location points is determined by the distance relationship between each location point. When the distance between each location point is less than a preset distance threshold, it is determined that the number of location points collected is sufficient.

[0086] Step 403: Based on the location point of each three-dimensional spatial structure and the spatial distribution information of the gradient of the static magnetic field, determine the maximum magnetic field gradient corresponding to the three-dimensional spatial structure at each location.

[0087] In practice, based on the collected location points and static magnetic field gradient spatial distribution information of each three-dimensional spatial structure, the total magnetic field gradients involved in all location points corresponding to the location of the three-dimensional spatial structure are determined. Among the total magnetic field gradients involved in all location points, the largest magnetic field gradient is determined as the largest magnetic field gradient corresponding to the three-dimensional spatial structure of that body part at that location.

[0088] In this embodiment, by determining the three-dimensional spatial structure of the target body part from which the discomfort originates, the maximum magnetic field gradient corresponding to the three-dimensional spatial structure of the target body part at each sampling location is determined. The bed movement speed is determined based on this maximum magnetic field gradient, and the bed movement speed limit is determined in stages, thereby improving the flexibility of bed movement.

[0089] In one embodiment, such as Figure 5 As shown, the specific processing steps of step 204 include the following:

[0090] Step 501: Perform a division operation based on the limit of the rate of change of the magnetic field and the maximum magnetic field gradient corresponding to each three-dimensional spatial structure to determine the bed movement speed corresponding to the position interval of each three-dimensional spatial structure of the body part.

[0091] In implementation, the magnetic resonance control system performs a division operation based on the magnetic field change rate limit and the maximum magnetic field gradient (Grad(B0)max) corresponding to each three-dimensional spatial structure. The specific calculation formula is: V max =Limit / Grad(B0)max, which determines the bed movement speed within the position range of the three-dimensional spatial structure at each position of the body part. This bed movement speed is also the limit value of the bed movement speed when controlling the movement of the bed.

[0092] Step 502: Determine the bed movement strategy based on the bed movement speed corresponding to the position interval of each three-dimensional spatial structure of the body part.

[0093] In practice, for each body part, the movement speed of the bed corresponding to the three-dimensional spatial structure of that body part at various locations within the magnetic scanning area is determined. This speed limit (also known as the safe movement speed limit) is used as the movement speed limit for each movement range of the bed, thus obtaining the bed movement strategy for that body part. For example, the head, as a target body part that is easily affected by magnetic fields and causes discomfort, has corresponding safe movement speed limits for each location interval at each preset acquisition location within the magnetic scanning area. For example: first location interval: 3 m / s, second location interval: 4 m / s, third location interval: 4 m / s, ... Nth location interval: 2 m / s (where N is greater than 3).

[0094] In one embodiment, such as Figure 6 As shown, if there are multiple target body parts, then for the selected bed movement strategy, it is necessary to fuse the movement strategies. The specific fusion method is as follows:

[0095] Step 601: Compare the bed movement speeds within the same location interval in multiple bed movement strategies corresponding to multiple target body parts, determine the minimum movement speed within each location interval, and obtain the fused bed movement strategy.

[0096] In implementation, the MRI control system initially determines multiple bed movement strategies based on multiple target body parts. It then compares the bed movement speeds within the same positional interval of these strategies. For example, if the scanned patient has three target body parts—head, shoulder, and abdomen—three bed movement strategies are determined for each body part. The movement speeds within each positional interval of these three strategies are compared. Specifically, if the movement speed for the head strategy is 3 m / s, for the shoulder strategy it's 4 m / s, and for the abdomen strategy it's 4.5 m / s within the first positional interval, the speeds within this interval are compared, and the speed with the lowest speed is determined as the final movement speed for that positional interval. Finally, the movement speeds of each positional interval for each bed movement strategy are fused to obtain the final bed movement strategy.

[0097] In cases where all movement speeds are the same within the same location interval, the movement speed in any bed movement strategy is determined as the final movement speed within that location interval.

[0098] Step 602: Generate bed control instructions based on the fused bed movement strategy to control the bed movement system to adjust the bed movement speed.

[0099] In practice, the magnetic resonance control system generates bed control commands based on the fused bed movement strategy. These commands are then sent to the bed movement system, which adjusts the bed movement speed as the bed moves to each preset sampling position.

[0100] In this embodiment, if there are multiple target body parts that cause discomfort, the bed movement speed is determined by considering all target body parts. This ensures that the bed movement speed does not cause discomfort to the person being scanned, while also ensuring the highest efficiency of bed movement.

[0101] In this embodiment, based on the bed movement strategy, there are two corresponding control methods for the bed movement strategy, as detailed below:

[0102] Method 1, such as Figure 7 As shown, the specific processing steps of step 102 include:

[0103] Step 701: Obtain the current location of the hospital bed.

[0104] In practice, the magnetic resonance control system obtains the current location of the patient's bed based on methods such as the bed location code.

[0105] Step 702: Based on the current location of the bed, determine the corresponding target bed movement speed in the bed movement strategy.

[0106] In practice, the magnetic resonance control system, based on the current location of the bed, queries the corresponding target bed movement speed within the bed movement strategy. For example, in this bed movement strategy, the current bed location corresponds to the movement speed of the third bed.

[0107] Step 703: Generate bed control instructions based on the target bed movement speed, and control the bed movement system to move at the target bed movement speed.

[0108] In practice, the magnetic resonance control system generates bed control commands based on the target bed movement speed, and controls the bed movement system to move at the target bed movement speed within the applicable position range of the target movement speed.

[0109] Method 2, such as Figure 8 As shown, the specific processing steps of step 102 include:

[0110] Step 801: Obtain the current moving speed and location of the hospital bed.

[0111] During implementation, the magnetic resonance control system acquires the current bed movement speed of the person being scanned and the current position of the bed according to the bed location code.

[0112] Step 802: Based on the current location of the bed, determine the corresponding target bed movement speed in the bed movement strategy.

[0113] In implementation, the magnetic resonance control system determines the target bed movement speed based on the current location of the bed within the bed movement strategy. The specific processing procedure is the same as step 701 above, and will not be repeated in this embodiment.

[0114] Step 803: Compare the target bed movement speed with the current bed movement speed, and generate bed control instructions based on the comparison results.

[0115] During implementation, the target bed's moving speed is compared with the current bed's moving speed, and bed control commands are generated based on the comparison results.

[0116] The bed control commands generated based on the comparison results correspond to two modes. Mode 1: If the comparison result shows that the target bed's moving speed is less than the current bed's moving speed, a deceleration control command is generated, instructing the bed movement system to reduce the current bed's moving speed to the target bed's moving speed. If the comparison result shows that the target bed's moving speed is greater than the current bed's moving speed, a speed-up control command is generated, instructing the bed movement system to increase the current bed's moving speed to the target bed's moving speed. If the comparison result shows that the target bed's moving speed is equal to the current bed's moving speed, a bed maintenance control command is generated, instructing the bed movement system to maintain the current bed's moving speed.

[0117] In this embodiment, according to the bed control command in Mode 1, the bed is controlled to maintain the target bed moving speed within the corresponding position interval. The target bed moving speed serves as the maximum safe moving speed to ensure the comfort of the person being scanned within that position interval. This allows the bed to be moved according to the target bed moving speed corresponding to each position interval during the magnetic resonance scanning process. It eliminates the need to move the bed at the minimum speed due to the different magnetic field gradients in each position interval, thus improving the efficiency of the magnetic resonance scanning.

[0118] Mode 2: If the comparison result shows that the target bed's moving speed is less than the current bed's moving speed, a bed deceleration control command is generated, instructing the bed movement system to reduce the current bed's moving speed. If the comparison result shows that the target bed's moving speed is greater than the current bed's moving speed, a bed acceleration control command is generated, instructing the bed movement system to increase the current bed's moving speed. If the comparison result shows that the target bed's moving speed is equal to the current bed's moving speed, a bed maintenance control command is generated, instructing the bed movement system to maintain the current bed's moving speed.

[0119] In this embodiment, according to the bed control instructions in Mode 2, the bed is controlled to move at a current speed that is less than or equal to the target bed's moving speed within each corresponding position interval, thereby improving the flexibility of bed control.

[0120] Step 804: Based on the bed control command, control the bed movement system to adjust the current bed movement speed.

[0121] In practice, the magnetic resonance control system controls the various moving devices in the bed moving system based on the bed control commands, thereby adjusting the current moving speed of the bed.

[0122] It should be understood that, although Figures 1 to 2 , Figures 4 to 8 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. Figures 1 to 2 , Figures 4 to 8 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.

[0123] In one embodiment, such as Figure 9 As shown, a magnetic resonance imaging (MRI) bed control device 900 is provided, comprising: a determination module 910, a generation module 920, and a control module 930, wherein:

[0124] The determination module 910 is used to determine the bed movement strategy based on the target body part of the scanned person. The bed movement strategy is the safe movement speed corresponding to each position of the target body part during the bed movement.

[0125] The generation module 920 is used to generate bed control instructions based on the bed movement strategy according to the bed control instructions, so that the bed movement speed does not exceed the safe movement speed.

[0126] The control module 930 controls the bed movement system to adjust the bed movement speed.

[0127] In one embodiment, the device 900 further includes:

[0128] The acquisition module is used to acquire the gradient spatial distribution information of the static magnetic field and the preset magnetic field change rate limit.

[0129] The acquisition module is used to acquire the position sequence of any body part of the sample object as the hospital bed moves; the position sequence includes the sampling point positions of the body part sampled at a preset time period.

[0130] The first determining module is used to determine the maximum magnetic field gradient corresponding to each three-dimensional spatial structure based on the gradient spatial distribution information of the static magnetic field and the three-dimensional spatial structure of the body parts at each position in the position sequence.

[0131] The second determining module is used to determine the bed movement speed corresponding to the position interval of the body part in each three-dimensional spatial structure based on the maximum magnetic field gradient and the limit of the magnetic field change rate, so as to obtain the bed movement strategy.

[0132] In one embodiment, the first determining module is used to determine the three-dimensional spatial structure of the body part at each position based on the contour information of each dimension at each position in the position sequence corresponding to any body part.

[0133] A predetermined number of location points are collected within the spatial range contained in each three-dimensional spatial structure;

[0134] Based on the location point and static magnetic field gradient spatial distribution information of each three-dimensional spatial structure, the maximum magnetic field gradient corresponding to the three-dimensional spatial structure at each location is determined.

[0135] In one embodiment, the second determining module is used to perform a division operation based on the magnetic field change rate limit and the maximum magnetic field gradient corresponding to each three-dimensional spatial structure to determine the bed movement speed within the position interval of each three-dimensional spatial structure of the body part.

[0136] The bed movement strategy is determined based on the bed movement speed corresponding to the position range of each three-dimensional spatial structure of the body parts.

[0137] In one embodiment, if there are multiple target body parts, the device 900 further includes:

[0138] The fusion module is used to compare the bed movement speeds within the same location interval in multiple bed movement strategies corresponding to multiple target body parts, determine the minimum movement speed within each location interval, and obtain the fused bed movement strategy.

[0139] The generation module 920 is also used to generate bed control commands based on the fused bed movement strategy, and to control the bed movement system to adjust the bed movement speed.

[0140] In one embodiment, the generation module 920 is specifically used to obtain the current location of the hospital bed;

[0141] Based on the current location of the bed, the corresponding target bed movement speed is determined in the bed movement strategy;

[0142] Based on the target bed movement speed, generate bed control commands to control the bed movement system to move at the target bed movement speed.

[0143] In one embodiment, the generation module 920 is specifically used to obtain the current moving speed and location of the hospital bed;

[0144] Based on the current location of the bed, the corresponding target bed movement speed is determined in the bed movement strategy;

[0145] Compare the target bed's movement speed with the current bed's movement speed, and generate bed control commands based on the comparison results;

[0146] Based on the bed control commands, the bed movement system adjusts the current bed movement speed.

[0147] The aforementioned magnetic resonance imaging (MRI) bed control device, using this device, controls the bed movement speed based on the bed movement strategy generated at various points in the non-uniform magnetic field of the target body part being scanned. This ensures that the patient does not experience discomfort while flexibly controlling the bed movement speed and improving scanning efficiency.

[0148] For specific limitations regarding the device, please refer to the limitations of the method described above, which will not be repeated here. Each module in the aforementioned magnetic resonance imaging (MRI) bed control device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device in hardware form, or stored in the memory of a computer device in software form, so that the processor can call and execute the corresponding operations of each module.

[0149] In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 10As 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 the computer program is executed by the processor, it implements a magnetic resonance imaging (MRI) bed control method. The display screen can be an LCD screen or an e-ink display 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.

[0150] Those skilled in the art will understand that Figure 10 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.

[0151] In one embodiment, a computer device is also provided, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps in the above method embodiments.

[0152] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon that, when executed by a processor, implements the steps in the above method embodiments.

[0153] 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.

[0154] 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.

[0155] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A magnetic resonance patient bed control method, characterized by, The method includes: Based on the target body part of the person being scanned, a bed movement strategy is determined, which includes setting a corresponding safe movement speed for each position of the target body part during the bed movement process; Generate bed control instructions based on the described bed movement strategy; The bed movement system is controlled according to the bed control command to adjust the bed movement speed so that the bed movement speed does not exceed the safe movement speed; The process of developing the bed mobility strategy includes: Based on the preset magnetic field change rate limit and the maximum magnetic field gradient corresponding to each three-dimensional spatial structure of the body part, a division operation is performed to determine the bed movement speed corresponding to the position interval of each three-dimensional spatial structure of the body part. The bed movement strategy is determined based on the bed movement speed corresponding to the position interval of each of the three-dimensional spatial structures of the body parts.

2. The method of claim 1, wherein, Before determining the bed movement speed within the position interval of each of the three-dimensional spatial structures of the body part by performing a division operation based on a preset limit for the rate of change of the magnetic field and the maximum magnetic field gradient corresponding to each three-dimensional spatial structure of the body part, the method further includes: Obtain the spatial distribution information of the gradient of the static magnetic field and the limit of the rate of change of the magnetic field; During the movement of the hospital bed, the position sequence of any body part of the sample object is collected as the hospital bed moves; the position sequence includes the sampling point positions of the body part sampled at a preset time period; Based on the gradient spatial distribution information of the static magnetic field and the three-dimensional spatial structure of the body part at each position in the position sequence, the maximum magnetic field gradient corresponding to each of the three-dimensional spatial structures is determined.

3. The method of claim 2, wherein, The determination of the maximum magnetic field gradient corresponding to each three-dimensional spatial structure based on the gradient spatial distribution information of the static magnetic field and the three-dimensional spatial structure of the body part at each position in the position sequence includes: For any of the body parts corresponding to the position sequence, the three-dimensional spatial structure of the body part at each position is determined based on the contour information of each dimension at each position in the position sequence. A predetermined number of location points are collected within the spatial range contained in each of the three-dimensional spatial structures. Based on the location of each of the three-dimensional spatial structures and the gradient spatial distribution information of the static magnetic field, the maximum magnetic field gradient corresponding to the three-dimensional spatial structure at each location is determined.

4. The method of claim 1, wherein, If there are multiple target body parts, the method further includes: Compare the bed movement speeds within the same location interval in multiple bed movement strategies corresponding to multiple target body parts, determine the minimum movement speed within each location interval, and obtain the fused bed movement strategy. The step of generating bed control commands based on the bed movement strategy to control the bed movement system to adjust the bed movement speed includes: Based on the fused bed movement strategy, a bed control command is generated to control the bed movement system to adjust the bed movement speed.

5. The method of claim 1, wherein, The step of adjusting the bed movement speed by controlling the bed movement system according to the bed control command includes: Get the current location of the hospital bed; Based on the current location of the hospital bed, the corresponding target hospital bed movement speed is determined in the hospital bed movement strategy; Based on the target bed movement speed, a bed control command is generated to control the bed movement system to move at the target bed movement speed.

6. The method of claim 1, wherein, The step of adjusting the bed movement speed by controlling the bed movement system according to the bed control command includes: Obtain the current movement speed and location of the hospital bed; Based on the current location of the hospital bed, the corresponding target hospital bed movement speed is determined in the hospital bed movement strategy; Compare the target bed's moving speed with the current bed's moving speed, and generate bed control commands based on the comparison results; Based on the bed control command, the bed movement system is controlled to adjust the current bed movement speed.

7. A magnetic resonance patient bed control device, characterized by The device includes: The determination module is used to determine the bed movement strategy based on the target body part of the scanned person. The bed movement strategy includes the safe movement speed corresponding to each position of the target body part during the bed movement. The generation module is used to generate bed control commands based on the bed movement strategy. The control module is used to control the bed moving system to adjust the bed moving speed according to the bed control command, so that the bed moving speed does not exceed the safe moving speed; The second determining module is used to perform a division operation based on a preset magnetic field change rate limit and the maximum magnetic field gradient corresponding to each three-dimensional spatial structure of the body part to determine the bed movement speed within the position interval of each three-dimensional spatial structure of the body part, and to determine the bed movement strategy based on the bed movement speed within the position interval of each three-dimensional spatial structure of the body part.

8. The apparatus of claim 7, wherein, The device further includes: The acquisition module is used to acquire the gradient spatial distribution information of the static magnetic field and the limit of the magnetic field change rate; The acquisition module is used to acquire the position sequence of any body part of the sample object as the hospital bed moves; the position sequence includes the sampling point positions of the body part sampled at a preset time period; The first determining module is used to determine the maximum magnetic field gradient corresponding to each of the three-dimensional spatial structures based on the gradient spatial distribution information of the static magnetic field and the three-dimensional spatial structure of the body part at each position in the position sequence. 9.A computer device, comprising a memory and a processor, wherein the memory stores a computer program, and the computer device is configured to perform the method according to any one of claims 1-8 when the computer program is executed by the processor. When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6.

10. A computer-readable storage medium having stored thereon a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

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