Method, apparatus and magnetic resonance scanning method for setting scan parameters

Abstract

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

Description

Technical Field

[0001] This application relates to the field of magnetic resonance imaging technology, and in particular to a scanning parameter setting method, apparatus and magnetic resonance scanning method. Background Technology

[0002] During magnetic resonance imaging (MRI) scans, frequent localization operations are required. To provide a more comprehensive view of the scanned area, various scanning methods can be used to acquire images of different morphologies of the scanned area, thereby enabling the analysis of the condition of the scanned area.

[0003] For example, different scanning methods include multi-slice simultaneous excitation (MSE) and non-MSE techniques. In MSE, the number of scanning layers is generally an integer multiple of the MSE sampling factor, while in non-MSE, the number of scanning layers is arbitrary. In this case, when acquiring image sequences of the user's scanned area using both MSE and non-MSE techniques, the resulting image shows a misalignment between the slice positions of the MSE acquisition sequence and the non-MSE acquisition sequence (referred to as the normal acquisition sequence).

[0004] In the case of image misalignment described above, image sequences acquired by different scanning methods have no comparative reference value, resulting in inaccurate final image analysis results. Summary of the Invention

[0005] Therefore, it is necessary to provide a scanning parameter setting method, device, and magnetic resonance scanning method that can improve the accuracy of image analysis results in response to the above-mentioned technical problems.

[0006] Firstly, a method for setting scanning parameters is provided, the method comprising:

[0007] Obtain the reference scan sequence corresponding to the target area, and determine the first scan range of the excited sheet of the target area based on the reference scan sequence;

[0008] The scanning protocol to be executed is obtained, and the second scanning range of the target area to be excited layer is determined according to the scanning protocol to be executed; the second scanning range is determined by the scanning parameters of the scanning protocol to be executed.

[0009] If the second scan range differs from the first scan range, the scan parameters of the scan protocol to be executed are adjusted to generate the target scan sequence.

[0010] In one optional embodiment, generating a target scan sequence based on adjusting the scan parameters of the scan protocol to be executed includes:

[0011] Determine the location information of the stimulated sheets within the first scanning range;

[0012] Based on the position information of the stimulated slice, the scanning parameters of the scanning protocol to be executed are adjusted so that the position parameters of at least one stimulated slice within the second scanning range sequentially reuse the position information of the stimulated slice, thereby obtaining the target scanning sequence.

[0013] In one optional embodiment, the stimulated slice is located at a preset first position; based on the position information of the stimulated slice, the scanning parameters of the scanning protocol to be executed are adjusted so that the position parameters of at least one slice to be stimulated within the second scanning range sequentially reuse the position information of the stimulated slice, thereby obtaining a target scanning sequence, including:

[0014] Based on the position information of the stimulated layer, at least one layer to be stimulated is sequentially aligned with the position of the stimulated layer to obtain the target scanning sequence.

[0015] In one optional embodiment, the stimulated slice is located at a preset second position; based on the position information of the stimulated slice, the scanning parameters of the scanning protocol to be executed are adjusted so that the position parameters of at least one slice to be stimulated within the second scanning range sequentially reuse the position information of the stimulated slice, thereby obtaining a target scanning sequence, including:

[0016] Based on the position information of the stimulated layer, at least one layer to be stimulated is sequentially aligned with the position of the stimulated layer in reverse order to obtain the target scanning sequence.

[0017] In one optional embodiment, the reference scan sequence is a non-multilayer simultaneous excitation acquisition sequence, and the target scan sequence is a multilayer simultaneous excitation acquisition sequence; or, the reference scan sequence is a multilayer simultaneous excitation acquisition sequence, and the target scan sequence is a non-multilayer simultaneous excitation acquisition sequence.

[0018] In one optional embodiment, adjusting the scanning parameters of the scanning protocol to be executed to generate a target scanning sequence includes:

[0019] Determine the location information of the excited sheets on the target edge side of the reference scan sequence;

[0020] Based on the position information of the stimulated layer on the edge side of the target, at least one layer to be stimulated is aligned with the position of the stimulated layer to obtain the target scanning sequence.

[0021] In one optional embodiment, the reference scan sequence is a 2D sequence and the target scan sequence is a 3D sequence; or, the reference scan sequence is a 3D sequence and the target scan sequence is a 2D sequence.

[0022] In one alternative embodiment, the target scan sequence inherits the scan parameters of the reference scan sequence and reuses the shimming range of the reference scan sequence.

[0023] Secondly, a magnetic resonance scanning method is provided, the method comprising:

[0024] Obtain the reference scan sequence corresponding to the target area, and determine the first scan range of the excited sheet of the target area based on the reference scan sequence;

[0025] The scanning protocol to be executed is obtained, and the second scanning range of the target area to be excited layer is determined according to the scanning protocol to be executed; the second scanning range is determined by the scanning parameters of the scanning protocol to be executed.

[0026] If the second scan range is different from the first scan range, adjust the scan parameters of the scan protocol to be executed to generate the target scan sequence;

[0027] Execute the target scanning sequence to perform magnetic resonance scanning on the target area.

[0028] Thirdly, a scanning parameter setting device is provided, the device comprising:

[0029] The first acquisition module is used to acquire a reference scan sequence corresponding to the target area, and determine the first scan range of the excited slice of the target area based on the reference scan sequence.

[0030] The second acquisition module is used to acquire the scanning protocol to be executed and determine the second scanning range of the target area to be excited layer according to the scanning protocol to be executed; the second scanning range is determined by the scanning parameters of the scanning protocol to be executed.

[0031] The determination module is used to adjust the scanning parameters of the scanning protocol to be executed and generate the target scanning sequence when the second scanning range is different from the first scanning range.

[0032] Fourthly, a magnetic resonance scanning device is provided, the device comprising:

[0033] The first determining module is used to acquire the reference scanning sequence corresponding to the target part, and determine the first scanning range of the excited sheet of the target part according to the reference scanning sequence;

[0034] The second determining module is used to acquire the scanning protocol to be executed and determine the second scanning range of the target area to be excited layer according to the scanning protocol to be executed; the second scanning range is determined by the scanning parameters of the scanning protocol to be executed.

[0035] The adjustment module is used to adjust the scanning parameters of the scanning protocol to be executed and generate the target scanning sequence when the second scanning range is different from the first scanning range.

[0036] The scanning module is used to execute the target scanning sequence to perform magnetic resonance scanning on the target area.

[0037] Fifthly, 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 any of the methods described in the first aspect above.

[0038] A sixth aspect provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements any of the methods described in the first aspect above.

[0039] The aforementioned scanning parameter setting method, apparatus, and magnetic resonance scanning method involve a computer device acquiring a reference scanning sequence corresponding to the target site, determining a first scanning range of the stimulated slices in the target site based on the reference scanning sequence, acquiring a scanning protocol to be executed, and determining a second scanning range of the stimulated slices in the target site based on the scanning protocol to be executed. If the second scanning range differs from the first scanning range, the scanning parameters of the scanning protocol to be executed are adjusted to generate a target scanning sequence. The second scanning range is determined by the scanning parameters of the scanning protocol to be executed. In this method, the computer device adjusts the scanning parameters of the scanning protocol to be executed based on the first scanning range of the stimulated slices in the target site and the second scanning range of the stimulated slices in the target site, thereby generating at least one target scanning sequence in which the stimulated slices are aligned with the stimulated slices determined by the reference scanning sequence. In this case, the scanning parameters of the scanning protocol to be executed can reuse the scanning parameters of the reference scanning sequence, and the medical images obtained under different scanning methods have mutual reference value, improving the accuracy of the medical image analysis results of the target site. Attached Figure Description

[0040] Figure 1 This is an application environment diagram of a scanning parameter setting method in one embodiment;

[0041] Figure 2 This is a flowchart illustrating a scanning parameter setting method in one embodiment;

[0042] Figure 3 This is a flowchart illustrating a scanning parameter setting method in one embodiment;

[0043] Figure 4 This is a schematic diagram illustrating the alignment of the acquisition sequence positions in one scenario corresponding to two scanning methods in one embodiment;

[0044] Figure 5 This is a schematic diagram of the reuse of the shim range after the acquisition sequence positions are aligned in one scenario corresponding to two scanning methods in one embodiment;

[0045] Figure 6 This is a schematic diagram illustrating the alignment of the acquisition sequence positions in one scenario corresponding to two scanning methods in one embodiment;

[0046] Figure 7 This is a schematic diagram of the reuse of the shim range after the acquisition sequence positions are aligned in one scenario corresponding to two scanning methods in one embodiment;

[0047] Figure 8 This is a schematic diagram illustrating the alignment of the acquisition sequence positions in one scenario corresponding to two scanning methods in one embodiment;

[0048] Figure 9 This is a schematic diagram of the reuse of the shim range after the acquisition sequence positions are aligned in one scenario corresponding to two scanning methods in one embodiment;

[0049] Figure 10 This is a schematic diagram illustrating the alignment of the acquisition sequence positions in one scenario corresponding to two scanning methods in one embodiment;

[0050] Figure 11 This is a schematic diagram of the reuse of the shim range after the acquisition sequence positions are aligned in one scenario corresponding to two scanning methods in one embodiment;

[0051] Figure 12 This is a schematic diagram illustrating the correspondence between RF pulses and selected layer positions in one embodiment;

[0052] Figure 13 This is a flowchart illustrating a scanning parameter setting method in one embodiment;

[0053] Figure 14 This is a schematic diagram illustrating the alignment of the acquisition sequence positions in one scenario corresponding to two scanning methods in one embodiment;

[0054] Figure 15 This is a schematic diagram illustrating the alignment of the acquisition sequence positions in one scenario corresponding to two scanning methods in one embodiment;

[0055] Figure 16 This is a schematic diagram illustrating the alignment of the acquisition sequence positions in one scenario corresponding to two scanning methods in one embodiment;

[0056] Figure 17 This is a schematic diagram illustrating the alignment of the acquisition sequence positions in one scenario corresponding to two scanning methods in one embodiment;

[0057] Figure 18 This is a flowchart illustrating a scanning parameter setting method in one embodiment;

[0058] Figure 19 This is a flowchart illustrating a magnetic resonance scanning method in one embodiment;

[0059] Figure 20 This is a structural block diagram of a scanning parameter setting device in one embodiment;

[0060] Figure 21 This is a structural block diagram of a magnetic resonance scanning device in one embodiment. Detailed Implementation

[0061] 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.

[0062] Under different scanning methods, the images of the target area obtained may exhibit inconsistencies in position, reducing the value of cross-referencing. For example, in multi-level simultaneous excitation (MLSE) and non-MLSE simultaneous excitation (N) techniques (normal acquisition / layer-by-layer acquisition), the number of scanning layers in MSE is generally an integer multiple of the MSE sampling factor. For instance, if the MSE sampling factor is N (N≥2 and is an integer), then the number of slice groups acquired by MSE is an integer multiple of N. However, the number of slice groups in the acquisition sequence acquired by non-MLSE is unlimited, and the number of scanned slices of the detected object cannot always be guaranteed to be an integer multiple of N. This usually results in the acquisition sequence using MSE having a few more (or fewer) scanning layers compared to the normal acquisition sequence, leading to a mismatch in the image positions between the two scans. Of course, similar problems exist with other different scanning methods; for example, the image positions of 2D acquisition sequences and 3D acquisition sequences also cannot be matched. This results in the acquisition sequences obtained by different scanning methods not having mutual reference value, and the image analysis results are unreliable. Based on this, this application provides a method for aligning the positions of acquisition sequences obtained by different scanning methods to obtain different acquisition sequences with consistent positions, thereby improving the reference value between acquisition sequences obtained by different scanning methods, and also improving the reliability and accuracy of image analysis results.

[0063] The scanning parameter setting method provided in this application can be applied to, for example... Figure 1 In the application environment shown, in one embodiment, a computer device is provided, which may be a server, and its internal structure diagram may be as follows. Figure 1As 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 scanning parameter setting 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.

[0064] Those skilled in the art will understand that Figure 1 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.

[0065] 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. The following 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 2-17 The scanning parameter setting method provided in this embodiment can be executed by a computer device, or it can be a scanning parameter setting device. This scanning parameter setting device can be part or all of the computer device through software, hardware, or a combination of both. In the following method embodiments, the execution subject is always described using a computer device as an example.

[0066] In one embodiment, such as Figure 2 As shown, a method for setting scanning parameters is provided, including the following steps:

[0067] S201. Obtain the reference scan sequence corresponding to the target area, and determine the first scan range of the excited slice of the target area based on the reference scan sequence.

[0068] The reference scan sequence includes multiple scan parameters. The first scan range can be determined by the position information of the excited sheet of the target part and / or the shimming range of the target part, etc., contained in the reference scan sequence.

[0069] The reference scan sequence includes various related parameters such as radio frequency pulses, slice-selective gradient fields, phase-coded gradient fields, frequency-coded gradient fields, and the acquisition time of MR signals. The types of reference scan sequences can include FID sequences, spin echo sequences, gradient echo sequences, and hybrid sequences formed by fast spin gradient echo sequences and planar echo imaging sequences. Reference scan sequences can correspond to multi-slice simultaneous excitation acquisition methods, non-multi-slice simultaneous excitation acquisition methods, 2D scanning, and 3D scanning.

[0070] In this embodiment, the computer device can receive scanning parameters of a reference scanning sequence that has been performed on the target area before the current time, transmitted by the scanning device. For example, the computer device can receive a reference scanning sequence applied to the target area in a non-multi-slice simultaneous excitation acquisition mode, transmitted by the MRI device. This embodiment does not limit this. The scanning parameters of the reference scanning sequence may include repetition time, echo time, effective time, echo train length, echo gap, reversal time, number of excitations, acquisition time, slice thickness, slice spacing, scan matrix, field of view, deflection angle, etc.

[0071] In this embodiment, the positional information of the excited layers of the target region included in the reference scan sequence is determined by two scanning parameters: layer thickness and interlayer spacing. The layer thickness is primarily determined by the gradient field strength of the selected layer and the bandwidth of the radio frequency pulse in the scanning parameters. The interlayer spacing is the distance between two adjacent layers. The shimming range of the target region is mainly determined by the field of view (FOV), which is the actual range of the reference scan sequence, specifically the actual size of the image region in the frequency encoding direction and the phase encoding direction.

[0072] S202. Obtain the scanning protocol to be executed, and determine the second scanning range of the target region to be excited layer according to the scanning protocol to be executed. The second scanning range is determined by the scanning parameters of the scanning protocol to be executed.

[0073] The scanning protocol to be executed may include scanning parameters of scanning sequences that have not been executed on the target area; it may also include other scanning parameters that are different from those corresponding to the reference scanning sequence. In this embodiment, the computer device determines the second scanning range of the target area to be excited by the field of view parameters of the scanning protocol to be executed. Similar to the first scanning range, the second scanning range may be determined by scanning parameters such as the position information of the target area to be excited and / or the shimming range of the target area.

[0074] S203. If the second scan range is different from the first scan range, adjust the scan parameters of the scan protocol to be executed and generate the target scan sequence.

[0075] In this embodiment, at least one (or more) of the layers to be excited, as determined by the target scanning sequence, are respectively matched with the excited layers determined by the reference scanning sequence. Matching the layers to be excited with the excited layers determined by the reference scanning sequence can mean that, for the same target area, it is excited by both the reference scanning sequence and the scanning protocol to be executed; during the two execution sequences, the position of the layer to be excited by the radio frequency pulse (e.g., the center of the radio frequency pulse) is the same as the position of the excited layer by the radio frequency pulse.

[0076] In this embodiment, the computer device determines whether the second scan range and the first scan range are the same. If the second scan range is determined to be different from the first scan range, the computer device adjusts the scan parameters of the scan protocol to be executed according to the scan parameters of the first scan range, thereby adjusting the second scan range and generating a target scan sequence. Optionally, the computer device can use the excited slice of the reference scan sequence as a reference to determine the position information of the excited slice, and then, based on the position of the excited slice, align at least one slice to be excited with the excited slice (the excitation centers of the slices in the two scans are the same or equal), thereby obtaining the target scan sequence after the alignment operation.

[0077] Since at least one excitation layer in the target scanning sequence is aligned with the position of the excitation layer in the reference scanning sequence, further, in one optional embodiment, the target scanning sequence inherits the scanning parameters of the reference scanning sequence and reuses the shimming range of the reference scanning sequence.

[0078] In a scanning scenario, based on the protocol parameters and contrast settings, it can automatically select whether to use a multi-layer simultaneous excitation sequence, and automatically determine the reuse of parameters according to the scanning order of the protocol. That is, during a single inspection, the multi-layer simultaneous excitation protocol can reuse the scanning parameters of a normal scan, and subsequent normal scans can reuse the scanning parameters of the multi-layer simultaneous excitation.

[0079] Due to various limitations, multi-slice simultaneous excitation sequences are not suitable for all imaging contrasts. Taking head scans as an example, routine clinical scans typically include protocols such as diffusion-weighted imaging (DWI), T1-Fse-Flair (T1-FSE-Flair), T2-Fse-Flair (T2-FSE-Flair), and T2-Fse. While DWI and T2-Fse can use multi-slice simultaneous excitation sequences to shorten scan time, the Flair protocol requires a relatively long inversion recovery time to suppress cerebrospinal fluid signals, resulting in a longer time of repetition (TR). Using multi-slice simultaneous excitation sequences in Flair does not shorten scan time; instead, it reduces the signal-to-noise ratio and increases the likelihood of motion artifacts. Therefore, multi-slice simultaneous excitation is generally not recommended for T1-Fse-Flair and T2-Fse-Flair protocols.

[0080] During the scanning process, DWI and T2-Fse are automatically set to multi-layer simultaneous excitation protocols, while T1-Fse-Flair and T2-Fse-Flair are automatically set to non-multi-layer simultaneous excitation protocols. The scanning parameters are reused among the protocols according to the scanning order.

[0081] In this embodiment, since at least one excitation layer of the target scanning sequence is aligned with the position of the excitation layer of the reference scanning sequence, the target scanning sequence can inherit the scanning parameters of the reference scanning sequence and reuse the shimming range of the reference scanning sequence. In this case, it is not necessary to recalculate the scanning parameters or perform shimming again when generating the target scanning sequence, which saves imaging time and improves imaging efficiency.

[0082] In the aforementioned scanning parameter setting method, the computer device acquires a reference scanning sequence corresponding to the target site, determines the first scanning range of the stimulated slices in the target site based on the reference scanning sequence, acquires a scanning protocol to be executed, and determines the second scanning range of the stimulated slices in the target site based on the scanning protocol to be executed. If the second scanning range differs from the first scanning range, the scanning parameters of the scanning protocol to be executed are adjusted to generate the target scanning sequence. The second scanning range is determined by the field of view of the scanning parameters of the scanning protocol to be executed. In this method, the computer device adjusts the scanning parameters of the scanning protocol to be executed based on the first scanning range of the stimulated slices in the target site and the second scanning range of the stimulated slices in the target site, thereby generating at least one target scanning sequence in which the stimulated slices are aligned with the stimulated slices determined by the reference scanning sequence. In this case, the scanning parameters of the scanning protocol to be executed can reuse the scanning parameters of the reference scanning sequence, and the medical images obtained under different scanning methods have mutual reference value, improving the accuracy of the medical image analysis results of the target site.

[0083] During the positioning alignment operation, computer devices employ different alignment methods depending on the scanning method. In one optional embodiment, such as... Figure 3 As shown, the target scan sequence is generated by adjusting the scan parameters of the scan protocol to be executed, including:

[0084] S301. Determine the position information of the excited sheet within the first scanning range.

[0085] In this embodiment, the computer device can determine the position information of the stimulated sheet within the first scanning range. For example, according to the acquisition sequence and acquisition position, the target sheet group can be the first stimulated sheet acquired along the first direction, the last stimulated sheet acquired, or an intermediate stimulated sheet acquired.

[0086] S302. Based on the position information of the stimulated slice, adjust the scanning parameters of the scanning protocol to be executed so that the position parameters of at least one stimulated slice within the second scanning range sequentially reuse the position information of the stimulated slice to obtain the target scanning sequence.

[0087] During the position alignment process, several situations may occur. One such situation includes the stimulated layer being in a preset first position. Based on the position information of the stimulated layer, the scanning parameters of the scanning protocol to be executed are adjusted so that the position parameters of at least one stimulated layer within the second scanning range sequentially reuse the position information of the stimulated layer, resulting in a target scanning sequence, including:

[0088] Based on the position information of the stimulated layer, at least one layer to be stimulated is sequentially aligned with the position of the stimulated layer to obtain the target scanning sequence.

[0089] Wherein, the reference scan sequence is a non-multi-layer simultaneous excitation acquisition sequence, and the target scan sequence is a multi-layer simultaneous excitation acquisition sequence; or, the reference scan sequence is a multi-layer simultaneous excitation acquisition sequence, and the target scan sequence is a non-multi-layer simultaneous excitation acquisition sequence.

[0090] The following example illustrates the concept of a reference scan sequence that is not a multi-layer simultaneous excitation and acquisition sequence, while the target scan sequence is a multi-layer simultaneous excitation and acquisition sequence.

[0091] In this embodiment, there are two cases for non-multilayer simultaneous excitation acquisition sequences and multilayer simultaneous excitation acquisition sequences: one is that the slice group range of the non-multilayer simultaneous excitation acquisition sequence is smaller than that of the multilayer simultaneous excitation acquisition sequence; the other is that the slice group range of the non-multilayer simultaneous excitation acquisition sequence is larger than that of the multilayer simultaneous excitation acquisition sequence.

[0092] In the first case, the computer device aligns the layers to be excited in the multi-layer simultaneous excitation acquisition sequence in ascending order based on the position (Slice1) of the first excited layer in the non-multi-layer simultaneous excitation acquisition sequence. The alignment result can be referenced. Figure 4 As shown, in this case, the last layer to be excited in the multi-layer simultaneous excitation acquisition sequence is an unaligned layer group. Since the image corresponding to this layer group is generally the edge image of the target area, we do not focus on this unaligned layer group here. With alignment, the multi-layer simultaneous excitation acquisition sequence can reuse the shimming range of the non-multi-layer simultaneous excitation acquisition sequence. A schematic diagram of the shimming range can be found in [reference needed]. Figure 5 As shown.

[0093] In the second case, the computer device aligns the layers to be excited in the multi-layer simultaneous excitation acquisition sequence in ascending order based on the position (Slice1) of the first excited layer in the non-multi-layer simultaneous excitation acquisition sequence. The alignment result can be referenced. Figure 6 As shown, at this point, the last excited slice, Slice7, in the non-multi-layer simultaneous excitation acquisition sequence does not have an aligned slice group. Since the image corresponding to this slice group is generally the edge image of the target area, we will not focus on this unaligned slice group. With alignment, the multi-layer simultaneous excitation acquisition sequence can reuse the shimming range of the non-multi-layer simultaneous excitation acquisition sequence. A schematic diagram of the shimming range can be found in [reference needed]. Figure 7 As shown.

[0094] If the reference scanning sequence is a multi-layer simultaneous excitation acquisition sequence and the target scanning sequence is a non-multi-layer simultaneous excitation acquisition sequence, the alignment method can refer to the method provided in the above embodiments, which will not be repeated here.

[0095] There is another possibility regarding the location of the target slice group: the stimulated slice is in a preset second position. Based on the position information of the stimulated slice, the scanning parameters of the scanning protocol to be executed are adjusted so that the position parameters of at least one stimulated slice within the second scanning range sequentially reuse the position information of the stimulated slice, resulting in a target scanning sequence, including:

[0096] Based on the position information of the stimulated layer, at least one layer to be stimulated is sequentially aligned with the position of the stimulated layer in reverse order to obtain the target scanning sequence.

[0097] Wherein, the reference scan sequence is a non-multi-layer simultaneous excitation acquisition sequence, and the target scan sequence is a multi-layer simultaneous excitation acquisition sequence; or, the reference scan sequence is a multi-layer simultaneous excitation acquisition sequence, and the target scan sequence is a non-multi-layer simultaneous excitation acquisition sequence.

[0098] The following example illustrates the concept of a reference scan sequence that is not a multi-layer simultaneous excitation and acquisition sequence, while the target scan sequence is a multi-layer simultaneous excitation and acquisition sequence.

[0099] In this embodiment, there are two cases for non-multilayer simultaneous excitation acquisition sequences and multilayer simultaneous excitation acquisition sequences: one is that the slice group range of the non-multilayer simultaneous excitation acquisition sequence is smaller than that of the multilayer simultaneous excitation acquisition sequence; the other is that the slice group range of the non-multilayer simultaneous excitation acquisition sequence is larger than that of the multilayer simultaneous excitation acquisition sequence.

[0100] In the first case, the computer device aligns the layers to be excited in the multi-layer simultaneous excitation acquisition sequence in reverse order based on the position (Slice7) of the last excited layer in the non-multi-layer simultaneous excitation acquisition sequence. The alignment result can be referenced. Figure 8 As shown, in this case, the first excited slice in the multi-layer simultaneous excitation acquisition sequence is an unaligned slice group. Since the image corresponding to this slice group is generally the edge image of the target area, we do not focus on this unaligned slice group here. With alignment, the multi-layer simultaneous excitation acquisition sequence can reuse the shimming range of the non-multi-layer simultaneous excitation acquisition sequence. A schematic diagram of the shimming range can be found in [reference needed]. Figure 9 As shown.

[0101] In the second case, the computer device reverses the order of the layers to be excited in the multi-layer simultaneous excitation acquisition sequence based on the position (Slice7) of the last excited layer in the non-multi-layer simultaneous excitation acquisition sequence. The alignment result can be referenced. Figure 10As shown, in this case, the first excited slice Slice1 of the non-multi-layer simultaneous excitation acquisition sequence does not have an aligned slice group. Since the image corresponding to this slice group is generally the edge image of the target area, we do not focus on this unaligned slice group. With alignment, the multi-layer simultaneous excitation acquisition sequence can reuse the shimming range of the non-multi-layer simultaneous excitation acquisition sequence. A schematic diagram of its shimming range can be found in [reference needed]. Figure 11 As shown.

[0102] If the reference scanning sequence is a multi-layer simultaneous excitation acquisition sequence and the target scanning sequence is a non-multi-layer simultaneous excitation acquisition sequence, the alignment method can refer to the method provided in the above embodiments, which will not be repeated here.

[0103] In all the aforementioned cases, alignment of multiple layers is achieved by selecting a target layer. The principle is that as long as the center position of the first or last layer is set to be the same, and the layer thickness THK and layer spacing d are kept consistent, the remaining layers can be aligned sequentially, thus achieving the purpose of aligning the scan positions of two different scan sequences.

[0104] In this embodiment, keeping the layer thickness THK constant can be achieved by adjusting the pulse bandwidth BW and the layer selection gradient Gz. The correspondence between the RF pulse and the layer selection position can be parameterized. Figure 12 As shown, the bandwidth of each RF pulse is BW, the gradient magnitude of the selected layer is Gz, and the layer thickness of each imaging layer is THK, which satisfy the following relationship:

[0105]

[0106] Where γ is the gyromagnetic ratio, a constant with a magnitude of 42.58 MHz / T. Let the interval between scanning layers be d, then the center position of each layer is:

[0107]

[0108] Where n is the number of the current scanned layer, n≥1, and is an integer. In this way, the excitation position of each layer in the target region can be obtained. In this embodiment, the target region includes four layers, Slice1-Slice4, each with the same RF pulse bandwidth. During the current scan, by changing the gap between adjacent layers through the center position of each layer, alignment with the scanned layer position of the previous scan is achieved.

[0109] In this embodiment, the computer device aligns the positions of the stimulated slices in the target scan sequence with those of each stimulated slice in the reference scan sequence based on the position information of the stimulated slices in the reference scan sequence. This method simply and effectively unifies the positions of the two image sequences, providing data support for subsequent image analysis.

[0110] Furthermore, the scanning method can also be other scanning methods, such as 2D scanning, 3D scanning, etc. In one optional embodiment, such as... Figure 13 As shown, the scanning parameters of the scanning protocol to be executed are adjusted to generate the target scan sequence, including:

[0111] S401. Determine the location information of the excited sheet on the target edge side of the reference scan sequence.

[0112] In this embodiment, the computer device can determine the position information of the stimulated sheets on the target edge side. For example, the position information of the stimulated sheets on the target edge side can be the position information of a group of sheets on the edge side in any direction. For example, the upper edge side, the lower edge side, the left edge side, the right edge side, etc.

[0113] S402. Based on the position information of the stimulated layer on the edge side of the target, at least one stimulated layer is aligned with the stimulated layer to obtain the target scanning sequence.

[0114] In this case, the reference scan sequence is a 2D sequence and the target scan sequence is a 3D sequence; or, the reference scan sequence is a 3D sequence and the target scan sequence is a 2D sequence. During the alignment process, several scenarios may occur; we will use the example of a 2D reference scan sequence and a 3D target scan sequence to illustrate this.

[0115] In this embodiment, there are two situations regarding 2D and 3D sequences: one is that the scanning range of the 2D sequence is smaller than that of the 3D sequence; the other is that the scanning range of the 2D sequence is larger than that of the 3D sequence.

[0116] In the first case, the computer device aligns the positions of at least one layer to be excited in the 3D sequence in ascending order based on the position of the excited layer on the upper edge side of the 2D sequence. The alignment result can be referenced. Figure 14 As shown. Alternatively, the computer device can reverse-align the positions of at least one layer to be excited in the 3D sequence based on the position of the excited layer on the lower edge side of the 2D sequence. The alignment result can be referenced. Figure 15 As shown. Similarly, with alignment, a 3D sequence can reuse the shim range of a 2D sequence.

[0117] In the second case, the computer device aligns the position of at least one layer to be excited in the 3D sequence in ascending order based on the position of the excited layer on the upper edge side of the 2D sequence. The alignment result can be referenced. Figure 16 As shown. Alternatively, the computer device can reverse-align the positions of at least one layer to be excited in the 3D sequence based on the position of the excited layer on the lower edge side of the 2D sequence. The alignment result can be referenced. Figure 17As shown. Similarly, with alignment, a 3D sequence can reuse the shim range of a 2D sequence.

[0118] Optionally, 3D scanning can also reuse the position of the scan blocks and reuse the shimming range; similar to the 2D alignment method mentioned in the above embodiments, while ensuring that the thickness of each scan block and the interval between scan blocks remain unchanged, the center position of the first or last scan block (within the shimming range) can be aligned, and the remaining scan blocks can be aligned in sequence.

[0119] Taking Time-of-Flight (TOF) scanning as an example: TOF is an important technique for drug-free vascular imaging in magnetic resonance imaging. This technique utilizes the enhancement effect of flowing blood to perform vascular imaging without contrast agents. However, as blood flow penetrates deeper into the scanning plane, the blood tissue is excited by radiofrequency pulses from multiple different layers, resulting in a saturation effect and causing the visualization of distal vessels to gradually deteriorate. Currently, a common method is to divide the entire field of view (FOV) of the imaging into multiple overlapping 3D scanning blocks to alleviate this phenomenon. Using multi-layer simultaneous excitation technology to excite multiple scanning blocks simultaneously can save TOF scanning time. Based on this principle, it is possible to automatically set the head TOF protocol to a multi-layer simultaneous excitation protocol and automatically reuse the shimming range of the previous scan; this embodiment does not limit this.

[0120] If the reference scan sequence is a 3D sequence and the target scan sequence is a 2D sequence, the alignment method can refer to the method provided in the above embodiments, which will not be repeated here.

[0121] In this embodiment, the computer device aligns the position of at least one excited layer in the target scan sequence with the excited layer in the reference scan sequence based on the position information of the excited layer on the target edge side of the reference scan sequence. This method simply and effectively unifies the positions of the two image sequences, providing data support for subsequent image analysis.

[0122] To better illustrate the above methods, such as Figure 18 As shown, this embodiment provides a method for setting scanning parameters, specifically including:

[0123] S101. Obtain the reference scan sequence corresponding to the target area;

[0124] S102. Determine the first scanning range of the excited slice of the target area based on the reference scanning sequence;

[0125] S103. Obtain the scanning protocol to be executed, and determine the second scanning range of the target area to be excited layer according to the scanning protocol to be executed;

[0126] S104. If the second scanning range is different from the first scanning range, determine the position information of the excited sheet within the first scanning range;

[0127] S105. Based on the position information of the stimulated sheet, adjust at least one sheet to be stimulated within the second scanning range to align with the position of the stimulated sheet in sequence to obtain the target scanning sequence.

[0128] S106. Determine the location information of the excited sheet on the target edge side of the reference scan sequence;

[0129] S107. Based on the position information of the stimulated layer on the edge side of the target, at least one stimulated layer is aligned with the stimulated layer to obtain the target scanning sequence.

[0130] S108. By inheriting the scanning parameters of the reference scan sequence and reusing the shimming range of the reference scan sequence.

[0131] In this embodiment, the computer device aligns the positions of each slice group in the candidate image sequence based on the positions of each slice group in the reference scan sequence, so that the positions of each slice group in the candidate image sequence are consistent with those of each slice group in the reference scan sequence. In this case, the candidate image obtained based on the candidate image sequence and the reference image obtained based on the reference scan sequence target the same location. Medical images obtained under different scanning methods have mutual reference value, improving the accuracy of medical image analysis results of the target location.

[0132] The image sequence processing method provided in the above embodiments has similar implementation principles and technical effects to the above method embodiments, and will not be described again here.

[0133] In one embodiment, such as Figure 19 As shown, a magnetic resonance scanning method is provided, the execution subject of which is a computer device, or a magnetic resonance scanning device. The magnetic resonance scanning device can be part or all of the computer device through software, hardware, or a combination of software and hardware. In the following method embodiments, the execution subject is a computer device as an example for description.

[0134] In one embodiment, Figure 19 A magnetic resonance scanning method is provided, which includes the following steps:

[0135] S501. Obtain the reference scan sequence corresponding to the target area, and determine the first scan range of the excited slice of the target area based on the reference scan sequence.

[0136] Similar to the embodiment provided in step 201, the reference scanning sequence includes multiple scanning parameters. The first scanning range can be determined by scanning parameters such as the position information of the excited slices of the target region and / or the shimming range of the target region. The reference scanning sequence includes various related parameters such as radio frequency pulses, slice selection gradient fields, phase-coded gradient fields, frequency-coded gradient fields, and the acquisition time of MR signals. The types of reference scanning sequences can be FID sequences, spin echo sequences, gradient echo sequences, and hybrid sequences formed by fast spin gradient echo sequences and planar echo imaging sequences. The reference scanning sequence can correspond to multi-slice simultaneous excitation acquisition methods, non-multi-slice simultaneous excitation acquisition methods, 2D scanning, 3D scanning, etc.

[0137] In this embodiment, the computer device can receive scanning parameters of a reference scanning sequence that has been performed on the target area before the current time, transmitted by the scanning device. For example, the computer device can receive a reference scanning sequence applied to the target area in a non-multilayer simultaneous excitation acquisition mode, transmitted by the MRI device. This embodiment does not limit this.

[0138] S502. Obtain the scanning protocol to be executed, and determine the second scanning range of the target area to be excited layer according to the scanning protocol to be executed; the second scanning range is determined by the scanning parameters of the scanning protocol to be executed.

[0139] In this embodiment, similar to the embodiment provided in step 202 above, the scanning protocol to be executed may include scanning parameters of the scanning sequence that has not been executed on the target area; it may also include other scanning parameters that are different from those corresponding to the reference scanning sequence. In this embodiment, the computer device determines the second scanning range of the target area to be excited sheet according to the field of view parameters of the scanning protocol to be executed. Similar to the first scanning range, the second scanning range may be determined by scanning parameters such as the position information of the target area to be excited sheet and / or the shimming range of the target area.

[0140] S503. If the second scan range is different from the first scan range, adjust the scan parameters of the scan protocol to be executed and generate the target scan sequence.

[0141] In this embodiment, when the second scanning range is different from the first scanning range, the computer device determines the appropriate scanning range based on the specified parameters. Figures 2-18The provided scanning parameter setting method adjusts the scanning parameters of the scanning protocol to be executed and generates a target scanning sequence. For example, the layer to be excited is matched with the excited layer determined by the reference scanning sequence. Optionally, for the same target area, it will be excited by the reference scanning sequence and the scanning protocol to be executed. When the sequence is executed twice, the position of the layer to be excited by the radio frequency pulse (such as the center of the radio frequency pulse) is the same as the position of the excited layer by the radio frequency pulse, thereby obtaining the target scanning sequence.

[0142] S504. Execute the target scan sequence to perform magnetic resonance scanning on the target area.

[0143] In this embodiment, the computer device performs a magnetic resonance imaging (MRI) scan on the target area using the corresponding scan parameters, based on the target scan sequence obtained after adjusting the scan parameters. Optionally, the computer device can automatically select whether to use a multi-slice simultaneous excitation sequence based on the protocol parameters and contrast settings, and automatically determine the parameter reuse status according to the scan order of the protocol. That is, during one examination, the multi-slice simultaneous excitation protocol can reuse the scan parameters of a normal scan, and subsequent normal scans can reuse the scan parameters of the multi-slice simultaneous excitation sequence.

[0144] In the aforementioned magnetic resonance imaging (MRI) scanning method, the computer device acquires a reference scan sequence corresponding to the target site, determines the first scan range of the excited slice of the target site based on the reference scan sequence, acquires a scan protocol to be executed, and determines the second scan range of the excited slice of the target site based on the scan protocol to be executed. If the second scan range differs from the first scan range, the scan parameters of the scan protocol to be executed are adjusted to generate a target scan sequence, which is then executed to perform MRI scanning on the target site. The second scan range is determined by the field of view of the scan parameters of the scan protocol to be executed. In this method, the computer device adjusts the scan parameters of the scan protocol to be executed based on the first scan range of the excited slice of the target site in the reference scan sequence and the second scan range of the excited slice of the target site, thereby generating at least one target scan sequence whose excited slice is aligned with the excited slice determined by the reference scan sequence. In this case, the scan parameters of the scan protocol to be executed can reuse the scan parameters of the reference scan sequence, and the medical images obtained under different scanning methods have mutual reference value, improving the accuracy of the medical image analysis results of the target site. Performing MRI scanning based on the generated target scan sequence improves the efficiency and accuracy of MRI scanning.

[0145] It should be understood that, although Figure 2-19The 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 in this document, there is no strict order in which these steps are executed, and they can be performed in other orders. Furthermore, Figure 2-19 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.

[0146] In one embodiment, such as Figure 20 As shown, a scanning parameter setting device is provided, comprising:

[0147] The first acquisition module 01 is used to acquire the reference scanning sequence corresponding to the target part, and determine the first scanning range of the excited sheet of the target part according to the reference scanning sequence;

[0148] The second acquisition module 02 is used to acquire the scanning protocol to be executed and determine the second scanning range of the target area to be excited layer according to the scanning protocol to be executed; the second scanning range is determined by the scanning parameters of the scanning protocol to be executed.

[0149] The determination module 03 is used to adjust the scanning parameters of the scanning protocol to be executed and generate the target scanning sequence when the second scanning range is different from the first scanning range.

[0150] In one optional embodiment, the determining module 03 is used to determine the position information of the stimulated slice within the first scanning range; and adjust the scanning parameters of the scanning protocol to be executed according to the position information of the stimulated slice, so that the position parameters of at least one stimulated slice within the second scanning range sequentially reuse the position information of the stimulated slice to obtain the target scanning sequence.

[0151] In one optional embodiment, the stimulated sheet is in a preset first position; the determining module 03 is used to align at least one sheet to be stimulated with the position of the stimulated sheet in the correct order according to the position information of the stimulated sheet, so as to obtain a target scanning sequence.

[0152] In one optional embodiment, the stimulated sheet is in a preset second position; the determining module 03 is used to align at least one sheet to be stimulated with the position of the stimulated sheet in reverse order according to the position information of the stimulated sheet, so as to obtain a target scanning sequence.

[0153] In one optional embodiment, the reference scan sequence is a non-multilayer simultaneous excitation acquisition sequence, and the target scan sequence is a multilayer simultaneous excitation acquisition sequence; or, the reference scan sequence is a multilayer simultaneous excitation acquisition sequence, and the target scan sequence is a non-multilayer simultaneous excitation acquisition sequence.

[0154] In one optional embodiment, the determining module 03 is further configured to determine the position information of the stimulated sheet on the target edge side of the reference scan sequence; and align the position of at least one stimulated sheet with the stimulated sheet based on the position information of the stimulated sheet on the target edge side to obtain the target scan sequence.

[0155] In one optional embodiment, the reference scan sequence is a 2D sequence and the target scan sequence is a 3D sequence; or, the reference scan sequence is a 3D sequence and the target scan sequence is a 2D sequence.

[0156] In one alternative embodiment, the target scan sequence inherits the scan parameters of the reference scan sequence and reuses the shimming range of the reference scan sequence.

[0157] Specific limitations regarding the scanning parameter setting device can be found in the limitations of the scanning parameter setting method described above, and will not be repeated here. Each module in the aforementioned scanning parameter setting 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.

[0158] In one embodiment, such as Figure 21 As shown, a magnetic resonance scanning device is provided, the device comprising:

[0159] The first determining module 11 is used to obtain a reference scanning sequence corresponding to the target part, and determine the first scanning range of the excited sheet of the target part according to the reference scanning sequence;

[0160] The second determining module 12 is used to acquire the scanning protocol to be executed and determine the second scanning range of the target area to be excited layer according to the scanning protocol to be executed; the second scanning range is determined by the scanning parameters of the scanning protocol to be executed.

[0161] Adjustment module 13 is used to adjust the scanning parameters of the scanning protocol to be executed and generate the target scanning sequence when the second scanning range is different from the first scanning range;

[0162] The scanning module 14 is used to execute the target scanning sequence to perform magnetic resonance scanning on the target area.

[0163] 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.

[0164] 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:

[0165] Obtain the reference scan sequence corresponding to the target area, and determine the first scan range of the excited sheet of the target area based on the reference scan sequence;

[0166] The scanning protocol to be executed is obtained, and the second scanning range of the target area to be excited layer is determined according to the scanning protocol to be executed; the second scanning range is determined by the scanning parameters of the scanning protocol to be executed.

[0167] If the second scan range differs from the first scan range, the scan parameters of the scan protocol to be executed are adjusted to generate the target scan sequence.

[0168] 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.

[0169] 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:

[0170] Obtain the reference scan sequence corresponding to the target area, and determine the first scan range of the excited sheet of the target area based on the reference scan sequence;

[0171] The scanning protocol to be executed is obtained, and the second scanning range of the target area to be excited layer is determined according to the scanning protocol to be executed; the second scanning range is determined by the scanning parameters of the scanning protocol to be executed.

[0172] If the second scan range is different from the first scan range, adjust the scan parameters of the scan protocol to be executed to generate the target scan sequence;

[0173] Execute the target scanning sequence to perform magnetic resonance scanning on the target area.

[0174] 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.

[0175] 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:

[0176] Obtain the reference scan sequence corresponding to the target area, and determine the first scan range of the excited sheet of the target area based on the reference scan sequence;

[0177] The scanning protocol to be executed is obtained, and the second scanning range of the target area to be excited layer is determined according to the scanning protocol to be executed; the second scanning range is determined by the scanning parameter field of view of the scanning protocol to be executed.

[0178] If the second scan range differs from the first scan range, the scan parameters of the scan protocol to be executed are adjusted to generate the target scan sequence.

[0179] 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.

[0180] 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:

[0181] Obtain the reference scan sequence corresponding to the target area, and determine the first scan range of the excited sheet of the target area based on the reference scan sequence;

[0182] The scanning protocol to be executed is obtained, and the second scanning range of the target area to be excited layer is determined according to the scanning protocol to be executed; the second scanning range is determined by the scanning parameters of the scanning protocol to be executed.

[0183] If the second scan range is different from the first scan range, adjust the scan parameters of the scan protocol to be executed to generate the target scan sequence;

[0184] Execute the target scanning sequence to perform magnetic resonance scanning on the target area.

[0185] 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.

[0186] 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.

[0187] 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.

[0188] 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 method for setting scanning parameters, characterized in that, The method includes: Obtain a reference scan sequence corresponding to the target region, and determine the first scan range of the excited sheet of the target region based on the reference scan sequence; A scan protocol to be executed is obtained, and a second scan range of the target region to be excited layer is determined according to the scan protocol to be executed; the second scan range is determined by the scan parameters of the scan protocol to be executed. If the second scanning range is different from the first scanning range, the scanning parameters of the scanning protocol to be executed are adjusted to generate a target scanning sequence; The step of adjusting the scanning parameters of the scanning protocol to be executed and generating the target scanning sequence includes: Determine the position information of the excited sheets within the first scanning range; Based on the position information of the stimulated slice, the scanning parameters of the scanning protocol to be executed are adjusted so that the position parameters of at least one slice to be stimulated within the second scanning range sequentially reuse the position information of the stimulated slice, thereby obtaining the target scanning sequence; or, Determine the position information of the excited sheet on the target edge side of the reference scan sequence; Based on the position information of the stimulated sheet layer on the edge side of the target, at least one sheet layer to be stimulated is aligned with the position of the stimulated sheet layer to obtain the target scanning sequence.

2. The method according to claim 1, characterized in that, The stimulated slice is located at a preset first position; adjusting the scanning parameters of the scanning protocol to be executed according to the position information of the stimulated slice, so that the position parameters of at least one slice to be stimulated within the second scanning range sequentially reuse the position information of the stimulated slice, to obtain the target scanning sequence, includes: Based on the position information of the stimulated layer, the at least one layer to be stimulated is sequentially aligned with the position of the stimulated layer to obtain the target scanning sequence.

3. The method according to claim 1, characterized in that, The stimulated slice is located in a preset second position; the step of adjusting the scanning parameters of the scanning protocol to be executed according to the position information of the stimulated slice, so that the position parameters of at least one slice to be stimulated within the second scanning range sequentially reuse the position information of the stimulated slice, to obtain the target scanning sequence, includes: Based on the position information of the stimulated layer, the at least one layer to be stimulated is sequentially aligned with the position of the stimulated layer in reverse order to obtain the target scanning sequence.

4. The method according to claim 1, characterized in that, The reference scan sequence is a non-multi-layer simultaneous excitation acquisition sequence, and the target scan sequence is a multi-layer simultaneous excitation acquisition sequence; or, the reference scan sequence is a multi-layer simultaneous excitation acquisition sequence, and the target scan sequence is a non-multi-layer simultaneous excitation acquisition sequence.

5. A magnetic resonance scanning method, characterized in that, The method includes: Obtain a reference scan sequence corresponding to the target region, and determine the first scan range of the excited sheet of the target region based on the reference scan sequence; A scan protocol to be executed is obtained, and a second scan range of the target region to be excited layer is determined according to the scan protocol to be executed; the second scan range is determined by the scan parameters of the scan protocol to be executed. If the second scanning range is different from the first scanning range, the scanning parameters of the scanning protocol to be executed are adjusted to generate a target scanning sequence; The target scanning sequence is executed to perform a magnetic resonance scan on the target region; The step of adjusting the scanning parameters of the scanning protocol to be executed and generating the target scanning sequence includes: Determine the position information of the excited sheets within the first scanning range; Based on the position information of the stimulated slice, the scanning parameters of the scanning protocol to be executed are adjusted so that the position parameters of at least one slice to be stimulated within the second scanning range sequentially reuse the position information of the stimulated slice, thereby obtaining the target scanning sequence; or, Determine the position information of the excited sheet on the target edge side of the reference scan sequence; Based on the position information of the stimulated sheet layer on the edge side of the target, at least one sheet layer to be stimulated is aligned with the position of the stimulated sheet layer to obtain the target scanning sequence.

6. A scanning parameter setting device, characterized in that, The device includes: The first acquisition module is used to acquire a reference scan sequence corresponding to the target site, and determine the first scan range of the excited sheet of the target site based on the reference scan sequence. The second acquisition module is used to acquire the scanning protocol to be executed and determine the second scanning range of the target region to be excited layer according to the scanning protocol to be executed; the second scanning range is determined by the scanning parameters of the scanning protocol to be executed. An adjustment module is used to adjust the scanning parameters of the scanning protocol to be executed and generate a target scanning sequence when the second scanning range is different from the first scanning range; The adjustment module includes: Determine the position information of the excited sheets within the first scanning range; Based on the position information of the stimulated slice, the scanning parameters of the scanning protocol to be executed are adjusted so that the position parameters of at least one slice to be stimulated within the second scanning range sequentially reuse the position information of the stimulated slice, thereby obtaining the target scanning sequence; or, Determine the position information of the excited sheet on the target edge side of the reference scan sequence; Based on the position information of the stimulated sheet layer on the edge side of the target, at least one sheet layer to be stimulated is aligned with the position of the stimulated sheet layer to obtain the target scanning sequence.

7. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 5.

8. A computer-readable storage medium having a computer program stored thereon, 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 5.

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