Scanning image building method and device, storage medium and scanning equipment

Abstract

The invention discloses a scanning image building method and device, a storage medium and scanning equipment, and the method comprises the steps: obtaining multiple times of scanning data obtained through multiple times of scanning in a target region, and enabling the number of times of scanning to be greater than 1; and determining a reconstruction period phase corresponding to each scanning data according to the matching degree of the overlapping region of the two adjacent scanning data, and performing image establishment according to the target data segment corresponding to the reconstruction period of each scanning data to obtain a region image of the target region. According to the method, a target area is scanned for multiple times, a reconstruction period phase corresponding to each time of scanning data is determined according to the matching degree of overlapped areas of two adjacent times of scanning data, and image building is carried out according to a target data segment corresponding to the reconstruction period of each time of scanning data so as to ensure that periods corresponding to data segments used by each time of data scanning during image building are consistent. An image staggered layer phenomenon obtained by image building is weakened, and scanning and image building of a target area with any length are realized.

Description

Technical Field

[0001] The present invention relates to the field of cardiac scanning technology, and in particular to a scanning imaging method, device, storage medium, and scanning equipment. Background Art

[0002] There are cases where the width of the CT (Computed Tomography) detector cannot cover the entire heart, and the scanning bed needs to be moved multiple times for scanning to cover the entire heart. Even when using wide-body detector CT to scan special patients such as coronary artery bypass grafts, the coverage of a single scan cannot meet the needs, and the scanning bed needs to be moved for multiple step scans to cover the area that needs to be imaged.

[0003] ECG-free scanning does not require patients to be connected to ECG gated electrodes, has no restrictions on heart rate, and allows patients to hold their breath or breathe freely. It is suitable for all people, especially emergency patients. Since the scan data obtained by ECG-free scanning does not have corresponding gated signal information and clear phase reference information, it undoubtedly increases the difficulty of imaging with multiple step scans, and the images obtained by imaging may have staggered layers and discontinuities. Summary of the invention

[0004] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, one object of the present invention is to provide a scanning imaging method to achieve imaging of a target area of ​​any length without ECG gating scanning, and the imaging effect is good.

[0005] The second objective of the present invention is to provide a scanning imaging device.

[0006] A third object of the present invention is to provide a computer-readable storage medium.

[0007] A fourth objective of the present invention is to provide a scanning device.

[0008] To achieve the above-mentioned purpose, the first aspect of the present invention proposes a scanning imaging method, which includes: acquiring multiple scanning data obtained by performing multiple scans on a target area, wherein the number of scans is greater than 1; determining the reconstruction phase corresponding to each scanning data according to the matching degree of the overlapping area of ​​two adjacent scanning data, and imaging according to the target data segments corresponding to the reconstruction phase of each scanning data to obtain a regional image of the target area.

[0009] According to the scanning imaging method of an embodiment of the present invention, the target area is scanned multiple times, the reconstruction phase of each acquired scanning data is determined, and imaging is performed based on the target data segment corresponding to the reconstruction phase of each scanning data, ensuring that the heart motion state corresponding to the data segment used for each scanning data during imaging is consistent, thereby achieving scanning imaging of a target area of ​​any length.

[0010] In addition, the scanning imaging method proposed in the above embodiment of the present invention may also have the following additional technical features:

[0011] According to one embodiment of the present invention, determining the reconstruction phase corresponding to each scanning data based on the matching degree of the overlapping area of ​​two adjacent scanning data includes: determining the best phase based on any scanning data of the multiple scanning data, and recording it as the reference reconstruction phase corresponding to the multiple scanning data; reconstructing the images corresponding to each period of other scanning data in the multiple scanning data based on the scanning data segments corresponding to each period of other scanning data; taking the reference reconstruction phase as the starting point, sequentially calculating the matching degree of the overlapping area between the image corresponding to each period of the current scanning data and the image corresponding to the determined reconstruction period of its adjacent scanning data, and recording the phase corresponding to the maximum matching degree as the reconstruction phase corresponding to the current scanning data.

[0012] According to one embodiment of the present invention, determining the reconstruction phase corresponding to each scanning data based on the matching degree of the overlapping area of ​​two adjacent scanning data includes: determining the best phase based on any scanning data of the multiple scanning data, and recording it as the reference reconstruction phase corresponding to the multiple scanning data; determining the reference target phase and its nearby phases corresponding to other scanning data in the multiple scanning data based on the reference reconstruction phase, and reconstructing the image corresponding to the reference target phase and its nearby phases of the other scanning data; taking the reference reconstruction phase as the starting point, sequentially calculating the matching degree of the overlapping area between the image corresponding to the reference target phase and its nearby phases of the current scanning data and the image corresponding to the determined reconstruction phase of its adjacent scanning data, and recording the phase corresponding to the maximum matching degree as the reconstruction phase corresponding to the current scanning data.

[0013] According to one embodiment of the present invention, determining the reconstruction phase corresponding to each scanning data based on the matching degree of the overlapping area of ​​two adjacent scanning data includes: reconstructing the image corresponding to each period of the multiple scanning data based on the scanning data segments corresponding to each period of the multiple scanning data; calculating the matching degree of the overlapping area of ​​the image corresponding to each period of two adjacent scanning data, and recording the phase corresponding to the maximum matching degree as the same reconstruction phase corresponding to the two adjacent scanning data.

[0014] According to one embodiment of the present invention, the matching degree of the overlapping area of ​​two adjacent scan data includes: the matching degree of the two-dimensional image at the same position of the image overlapping area of ​​two adjacent scan data; or the matching degree of the three-dimensional image sequence at the same position of the image overlapping area of ​​two adjacent scan data.

[0015] According to an embodiment of the present invention, the method further includes: if the scan data of each time do not include scan data of a heart region, recording any phase of the scan data of each time as a reconstruction phase corresponding to the scan data of each time.

[0016] According to one embodiment of the present invention, imaging is performed based on target data segments corresponding to the reconstruction period of each scanning data to obtain a regional image of the target area, including: selecting the target data segments corresponding to each scanning data based on the reconstruction period corresponding to each scanning data; and imaging is performed based on each target data segment to obtain a regional image of the target area.

[0017] According to one embodiment of the present invention, before acquiring multiple scan data obtained by performing multiple scans on the target area, the method further includes: determining a preset maximum scan time and a preset minimum scan time, wherein the preset maximum scan time and the preset minimum scan time are determined by a heartbeat cycle corresponding to the average heart rate of the heart, which fluctuates up and down within a preset time range; the method further includes: in each scanning process, if it is determined according to the identified heart movement stage that the scan does not cover the target heartbeat range, then when the actual scan time reaches the preset maximum scan time, the scan is terminated; if it is determined according to the identified heart movement stage that the scan has covered the target heartbeat range, and the actual scan time is less than the preset minimum scan time, then when the actual scan time reaches the preset minimum scan time, the scan is terminated.

[0018] According to an embodiment of the present invention, the method comprises: scanning the target area without ECG gating.

[0019] To achieve the above-mentioned purpose, a second aspect of the present invention proposes a scanning imaging device, characterized in that the device includes: an acquisition module, used to acquire multiple scanning data obtained by performing multiple scans on a target area, wherein the number of scans is greater than 1; a determination module, used to determine the reconstruction period corresponding to each scanning data according to the matching degree of the overlapping area of ​​two adjacent scanning data; and an imaging module, used to perform imaging according to the target data segments corresponding to the reconstruction period of each scanning data to obtain a regional image of the target area.

[0020] To achieve the above objectives, a third aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the scanning imaging method provided in the first aspect of the present invention is implemented.

[0021] To achieve the above-mentioned purpose, the fourth aspect of the present invention proposes a scanning device, including a memory and a processor, wherein the memory stores a computer program, and when the computer program is executed by the processor, the scanning imaging method proposed in the first aspect of the present invention is implemented.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a flow chart of a scanning imaging method according to an embodiment of the present invention;

[0024] Figure 2 is a flow chart of obtaining target area scanning data according to an embodiment of the present invention;

[0025] Figure 3 is a flow chart of determining the reconstruction phase of each scanning data according to a feasible embodiment of the present invention;

[0026] Figure 4 is a flow chart of determining the reconstruction phase of each scanning data according to another feasible embodiment of the present invention;

[0027] Figure 5 is a schematic diagram of a phase image reconstructed from multiple scan data according to an embodiment of the present invention;

[0028] Figure 6 is a schematic diagram of determining a reconstruction phase according to an embodiment of the present invention;

[0029] Figure 7 is a flowchart of determining the reconstruction phase of each scanning data according to another feasible embodiment of the present invention;

[0030] Figure 8 is a flow chart of obtaining a regional image of a target area according to an embodiment of the present invention;

[0031] Fig. 9 is a schematic diagram of a scanning imaging device according to an embodiment of the present invention;

[0032] Fig.10 4 is a structural block diagram of a scanning device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0034] Since there is no ECG-gated scanning in the heart area, it relies on wide-body detector CT that can cover the entire heart in a single scan. It does not use ECG signals and directly scans the heart. As long as the single scan covers a heartbeat cycle, the moment when the heart moves slowly can be found, and the data corresponding to that moment can be used to build an image, obtaining a clear, motion-artifact-free, continuous, and non-staggered heart image for diagnosis. However, the high purchase price of wide-body detector CT restricts the equipment needs of hospitals, which in turn limits the application of non-ECG-gated scanning.

[0035] In the case of scanning that requires multiple scans with the scanning bed moved, non-ECG-gated scanning is used. If the image phases of two adjacent scans cannot be guaranteed to be consistent, the overlapping parts of the images constructed by the two adjacent scans will be very different, and it is very likely that one is in the systolic phase and the other is in the diastolic phase. The heart contour and internal structure are very different. At this time, even if non-rigid registration and image fusion are used, it is difficult to stitch the images of the two scans. Especially for special parts such as coronary arteries, the problem of misalignment will be very serious, affecting the extraction of coronary arteries for diagnosis by the image post-processing workstation.

[0036] To solve the above problems, an embodiment of the present invention provides a scanning imaging method, apparatus, storage medium, and scanning equipment. The scanning imaging method, apparatus, storage medium, and scanning equipment of the embodiment of the present invention are described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0037] Figure 1 FIG. 1 is a flow chart of a scanning imaging method according to an embodiment of the present invention. Figure 1 As shown, the scanning imaging method may include:

[0038] S101, acquiring multiple scan data obtained by performing multiple scans on a target area, wherein the number of scans is greater than 1;

[0039] S102, determining the reconstruction phase corresponding to each scan data according to the matching degree of the overlapping area of ​​two adjacent scan data;

[0040] S103, constructing an image according to the target data segments corresponding to the reconstruction period of each scanning data to obtain a regional image of the target area.

[0041] In one embodiment of the present invention, the scanning imaging method may include: scanning the target area without ECG gating.

[0042] In the case where a single scan cannot cover the target area, the embodiment of the present invention adopts non-ECG gating to perform multiple step scans on the target area. The number of scans is determined by the area length of the target area and the maximum scan width of the detector. It should be noted that the multiple times used in the embodiment of the present invention refers to at least two times. Each scan data corresponds to a scanning bed position, and multiple scan data correspond to multiple step scanning bed positions.

[0043] Acquire multiple scan data obtained by multiple scans of the target area, calculate the matching degree of the overlapping area of ​​two adjacent scan data, and determine the reconstruction phase corresponding to each scan data in turn. Select the target data segment corresponding to each scan data according to the reconstruction phase corresponding to each scan data, and build an image according to each target data segment to ensure that the heartbeat state corresponding to each target data segment used during image building is consistent, which greatly reduces the staggered phenomenon of the image obtained by building the image.

[0044] The embodiment of the present invention uses non-ECG gating to perform multiple scans on a target area of ​​any length, ensuring that the heart movement state corresponding to the data segment used in each scan is consistent, so as to ensure that the image sequence constructed is basically consistent, and realizes the use of non-ECG gating to scan a target area of ​​any length for scanning and imaging, and the image effect obtained by imaging is good.

[0045] In addition, in the case of using ECG-gated scanning and requiring multiple scanning bed movements, due to the difference in heartbeat motions in different RR intervals, the motion states of the images of adjacent positions scanned twice in the same phase are slightly inconsistent, and the images obtained by imaging also have discontinuous staggered layers. In order to eliminate the discontinuous staggered layers, the relevant technical solutions of the embodiments of the present application can also be used.

[0046] In one embodiment of the present invention, Figure 2 As shown, obtaining multiple scan data obtained by performing multiple scans on the target area may include:

[0047] S201, determining the target number, the target stepping distance of the scanning bed, and the collimation width of the detector according to the area length of the target area, the maximum scanning width of the detector, and the initial scanning position;

[0048] S202, scanning the target area from the initial scanning position, and controlling the scanning bed to move a target step distance each time a scan is completed until a target number of scans are completed.

[0049] Specifically, when performing non-ECG gating scanning of the target area, the target number of times, the target step distance of the scanning bed, and the collimation width (actual scanning width) of the detector are determined according to the area length of the target area, the maximum scanning width of the detector, and the initial scanning position. The detector is controlled to scan the target area for the target number of times according to the collimation width, and the scanning bed is controlled to move the target step distance after each scan is completed. After the target number of scans is reached, the scan is terminated.

[0050] As a specific example, when the area length of the target area is greater than the maximum scanning width of one scan of the detector and less than the maximum scanning width of two scans of the detector, the target scanning number is determined to be 2 times in combination with the initial scanning position of the scan. The collimation width of the detector and the target stepping distance of the scanning bed are set according to the area length of the target area and the length of the pre-overlapping area of ​​the two scans. Generally, the collimation width of the detector and the target stepping distance of the scanning bed are set so that the length of the pre-overlapping area of ​​the two scans meets the splicing requirements to avoid the overlapping area from being subjected to excessive radiation. After controlling the detector to scan the first position area of ​​the target area once with the collimation width, the scanning bed is controlled to move the target stepping distance, and the detector is controlled again to scan the second position area of ​​the target area with the collimation width. It should be noted that there is an overlapping area between the first position area and the second position area.

[0051] In one embodiment of the present invention, before acquiring multiple scan data obtained by performing multiple scans on the target area, the scanning imaging method further includes: determining a preset maximum scan time and a preset minimum scan time, wherein the preset maximum scan time and the preset minimum scan time are determined by a heartbeat cycle corresponding to an average heart rate within a preset time range;

[0052] The scanning imaging method also includes:

[0053] During each scan, if it is determined that the scan does not cover the target heartbeat range according to the identified cardiac motion stage, the scan is terminated when the actual scan time reaches the preset maximum scan time.

[0054] If it is determined based on the identified cardiac motion stage that the scan has covered the target heartbeat range, and the actual scan time is less than the preset minimum scan time, the scan is terminated when the actual scan time reaches the preset minimum scan time.

[0055] When scanning the target area, in order to accurately scan the target heartbeat range, save dose, and reduce unnecessary radiation, the embodiment of the present invention sets a preset maximum and minimum scanning time before scanning the target area from the initial scanning position, that is, the absolute delay from the start of the scanning data is used as the representation of the phase, and a minimum scanning time phase and a maximum scanning time phase are set before scanning, and they fluctuate within a certain range within the corresponding time of a heartbeat cycle, respectively. During scanning, according to the recognition of the heartbeat cycle, a heart scan is performed at any time corresponding to the minimum scanning time phase and the maximum scanning time phase. It should be noted that since the patient's real-time heartbeat cycle cannot be obtained, the range between the minimum scanning time phase and the maximum scanning time phase will be set relatively large, and the maximum scanning time phase should try to cover more than one heartbeat cycle, and the minimum scanning time phase should try to cover more than one systolic period or diastolic period.

[0056] Specifically, in each scanning process, real-time scanning data is obtained, and the cardiac motion phase is identified based on the real-time scanning data. If the end-systole or end-diastole is not identified, or the end-systole and end-diastole are not identified, then when the actual scanning time reaches the preset maximum scanning time, the current scanning is terminated and the current scanning data is obtained. If the end-systole and end-diastole are identified, it can be determined that the scan has covered the target heartbeat range, but the actual scanning time is less than the preset minimum scanning time, then the scanning is continued until the preset minimum scanning time, the current scanning is terminated, and the current scanning data is obtained.

[0057] In the embodiment of the present invention, the preset maximum scan time and the preset minimum scan time can be set by floating up and down within a certain range respectively according to the time of one heartbeat cycle corresponding to the average heart rate of the patient obtained by empirical value or other methods before scanning. The maximum scan time is slightly longer than one heartbeat cycle, and the minimum scan time is slightly longer than one systolic period or diastolic period. Each step scan performs a heart scan according to the corresponding time within the set time range.

[0058] The embodiment of the present invention does not rely on ECG gating to perform a heart scan of any length, and covers the target area by moving the scanning bed step by step for multiple times. After each scan covers at least one heartbeat cycle, or each scan covers a set phase range including the systolic and diastolic periods, the current scan is immediately terminated, and the scanning bed is moved to the position of the second scan for the next scan, and so on until all target areas are scanned.

[0059] In a possible embodiment of the present invention, Figure 3 As shown, determining the reconstruction phase corresponding to each scan data according to the matching degree of the overlapping area of ​​two adjacent scan data may include:

[0060] S301, determining an optimal phase according to any scan data of multiple scan data, and recording it as a reference reconstruction phase corresponding to the multiple scan data;

[0061] S302, reconstructing images corresponding to each period of other scanning data according to scanning data segments corresponding to each period of other scanning data in the multiple scanning data;

[0062] S303, taking the reference reconstruction phase as the starting point, sequentially calculate the matching degree of the overlapping area between the image corresponding to each phase of the current scan data and the image corresponding to the determined reconstruction phase of the adjacent scan data, and record the phase corresponding to the maximum matching degree as the reconstruction phase corresponding to the current scan data.

[0063] In this embodiment, the best phase of any scan data of multiple scan data is determined, and the best phase of the scan data is recorded as the reference reconstruction phase corresponding to the multiple scan data, and the reconstruction phase of each scan data is determined based on the reference reconstruction phase.

[0064] Specifically, any scan data of the multiple scan data is selected, and images corresponding to each phase of the scan data are reconstructed according to the scan data, and the best phase of the scan data is determined according to the image quality corresponding to each phase of the scan data, such as whether there is motion artifact, etc. The best phase of the scan data can be recorded as the reconstruction phase corresponding to the scan data, and the reconstruction phases corresponding to other scan data can be determined based on the best phase of the scan data.

[0065] Specifically, the image corresponding to the best period of the scan data is reconstructed according to the scan data segment corresponding to the best period of the scan data. The images corresponding to the other periods of the scan data are reconstructed according to the scan data segments corresponding to the other periods of the scan data in the multiple scan data. With the reference reconstruction period as the starting point, the matching degree of the overlapping area of ​​the image corresponding to each period of the current scan data and the image corresponding to the determined reconstruction period of the adjacent scan data is calculated in sequence, and the period corresponding to the maximum matching degree is recorded as the reconstruction period corresponding to the current scan data.

[0066] It should be noted that when reconstructing the images corresponding to each period of the current scanning data and the images corresponding to the determined reconstruction period of the adjacent scanning data, only the images of the overlapping area can be reconstructed. The images of the overlapping area can be two-dimensional images or three-dimensional image sequences. Furthermore, the matching degree of the overlapping area of ​​two adjacent scanning data can be the matching degree of the two-dimensional images at the same position of the image overlapping area of ​​the two adjacent scanning data, or the matching degree of the three-dimensional image sequence at the same position of the image overlapping area of ​​the two adjacent scanning data. The same position can refer to the physical position of the target area.

[0067] As a specific embodiment, the best phase of the first scan data is selected and determined, and the best phase of the first scan data is recorded as the reference reconstruction phase corresponding to the multiple scan data, and the reconstruction phase corresponding to each scan data is determined based on the reference reconstruction phase. Specifically, the images of each phase of the first scan data can be reconstructed based on the first scan data, the systolic period and the diastolic period can be determined based on the state of the heart area in the images of each phase of the first scan data, and the best systolic period and / or the best diastolic period can be determined based on the motion artifacts in the systolic period image and the diastolic period image. The best systolic period or the best diastolic period is selected as the best phase, and the best phase is recorded as the reconstruction phase corresponding to the first scan data. The method for determining the systolic period image and the diastolic period image includes obtaining multiple reconstructed images based on the first scan data at a preset time interval, obtaining a curve of the volume change of the target area over time based on the multiple reconstructed images, and determining the systolic period image and the diastolic period image, or the best systolic period and / or the best diastolic period based on the volume-time curve. The multiple reconstruction phases can also be input into a trained phase recognition model to determine the systolic period image and the diastolic period image, the best systolic period and / or the best diastolic period. The phase recognition model may adopt a neural network model, etc. The phase recognition model may be trained by using image sequence samples including systolic images and diastolic images.

[0068] It should be noted that the best phase can be determined according to actual needs, and the best systolic phase or the best diastolic phase can be selected, and the regional image obtained by imaging is the best systolic phase image or the best diastolic phase image. The best systolic phase and the best diastolic phase can also be selected as the first best phase and the second best phase, respectively, so that when imaging, both the best systolic phase image and the best diastolic phase image can be obtained.

[0069] After determining the reconstruction phase of the first scanning data, the reconstruction phases of the other scanning data are determined according to the reconstruction phase of the first scanning data. Specifically, the images corresponding to each phase of the second scanning data are reconstructed according to the scanning data segments corresponding to each phase of the second scanning data. Starting from the reference reconstruction phase, the matching degree of the overlapping area of ​​the image corresponding to each phase of the second scanning data and the image corresponding to the reconstruction phase of the first scanning data is calculated in sequence, and the phase corresponding to the maximum matching degree is recorded as the reconstruction phase corresponding to the second scanning data.

[0070] By analogy, the scan data segments corresponding to the reconstruction period of the second scan and the scan data corresponding to each period of the third scan are used to reconstruct the overlapping parts of the images of the two adjacent scans. The matching degrees of the images corresponding to each period of the third scan and the overlapping parts of the images corresponding to the reconstruction period of the second scan are calculated respectively. The phase with the largest matching degree in the third scan is the phase that best matches the second scan and is used as the reconstructed phase of the third scan.

[0071] The embodiment of the present invention uses the matching degree of the image of the overlapping area to obtain the matching degree of the overlapping area of ​​two adjacent scan data. In other embodiments, the matching degree can be calculated directly using two scan data, and the scan data can be projection data, which can be expressed in the form of a sinusoidal graph.

[0072] In one embodiment of the present invention, calculating the matching degree of the overlapping area of ​​the image corresponding to each period of the current scanning data and the image corresponding to the determined reconstruction period of the adjacent scanning data includes:

[0073] Calculate the matching degree of the image corresponding to each period of the current scanning data and the two-dimensional image at the same position of the overlapping area of ​​the image corresponding to the determined reconstruction period of the adjacent scanning data; or

[0074] The matching degree of the three-dimensional image sequence at the same position of the overlapping area of ​​the image corresponding to each period of the current scanning data and the image corresponding to the determined reconstruction period of the adjacent scanning data is calculated.

[0075] It should be noted that the calculation of the matching degree may be based on two-dimensional images of two scans of the same position, or may be based on a three-dimensional image sequence of the overlapping portion of two scans of the same position.

[0076] As a specific embodiment, the matching degree calculation may be the calculation of mutual information or mean square error between two adjacent scans of the overlapping images.

[0077] The mutual information is defined as follows: in the overlapping part of each scan of the three-dimensional image X, the pixel values ​​are distributed in the interval [I_min, I_max], and are equally divided into N containers, where N can be 100. The number of pixels in each container is n(i). A pixel x belongs to the i(x)th container, and the probability distribution of x is p(x) = n(i(x)) / n_total, where n_total is the total number of pixels. Then the information entropy of the three-dimensional image X is: H(X) = -∑ x p(x)log2p(x). The image overlapping with the three-dimensional image X is the three-dimensional image Y, then the mutual information between the image X and the image Y is: I(X;Y)=H(X)+H(Y)-H(X,Y).

[0078] The embodiment of the present invention calculates the overlapping image parts of two adjacent scans based on mutual information, finds the reconstruction phase with the maximum mutual information with the overlapping parts of adjacent scans in each scan, and obtains the reconstruction phase of each scan. It should be noted that the calculation method of the matching degree is not limited to mutual information. The main example uses mutual information, and it can also be similarity calculation such as mean square error.

[0079] In another possible embodiment of the present invention, Figure 4As shown, determining the reconstruction phase corresponding to each scan data according to the matching degree of the overlapping area of ​​two adjacent scan data may include:

[0080] S401, determining an optimal phase according to any scan data of multiple scan data, and recording it as a reference reconstruction phase corresponding to the multiple scan data;

[0081] S402, according to the reference reconstruction phase, determining the reference target phase and its neighboring phases corresponding to other scanning data in the multiple scanning data, and reconstructing images corresponding to the reference target phase and its neighboring phases of other scanning data;

[0082] S403, taking the reference reconstruction phase as the starting point, sequentially calculate the matching degree of the overlapping area between the reference target phase of the current scan data and the image corresponding to its nearby phases and the image corresponding to the determined reconstruction phase of its adjacent scan data, and record the phase corresponding to the maximum matching degree as the reconstruction phase corresponding to the current scan data.

[0083] In order to reduce the number of phase matching, the reconstruction phase corresponding to the current scan data is determined more quickly. The embodiment of the present invention determines the reference target phase and its nearby phases corresponding to other scan data in the multiple scan data according to the reference reconstruction phase. Taking the reference reconstruction phase as the starting point, the matching degree of the overlapping area of ​​the image corresponding to the reference target phase of the current scan data and its nearby phases and the image corresponding to the reconstruction phase determined by the adjacent scan data is calculated in sequence.

[0084] Specifically, any scan data of the multiple scan data is selected, and images corresponding to each phase of the scan data are reconstructed according to the scan data, and the best phase of the scan data is determined according to the image quality corresponding to each phase of the scan data, such as whether there is motion artifact, etc. The best phase of the scan data can be recorded as the reconstruction phase corresponding to the scan data, and the best phase of the scan data can also be recorded as the reference reconstruction phase corresponding to other scan data, and other scan data can determine the reconstruction phase corresponding to their respective scan data based on the best phase of the scan data.

[0085] According to the scan data segment corresponding to the best phase of the scan data, the image corresponding to the best phase of the scan data is reconstructed. According to the reference reconstruction phase, the reference target phase and its nearby phases corresponding to other scan data in the multiple scan data are determined, and according to the scan data segments corresponding to the reference target phase and its nearby phases of other scan data, the images corresponding to the reference target phase and its nearby phases of other scan data are reconstructed. Taking the reference reconstruction phase as the starting point, the matching degree of the overlapping area of ​​the image corresponding to the reference target phase and its nearby phase of the current scan data and the image corresponding to the determined reconstruction phase of its adjacent scan data is calculated in sequence, and the phase corresponding to the maximum matching degree is recorded as the reconstruction phase corresponding to the current scan data.

[0086] It should be noted that when reconstructing the image corresponding to the target phase and its neighboring phases with reference to the sub-scan data and the image corresponding to the reconstruction phase determined by the adjacent sub-scan data, only the image of the overlapping area may be reconstructed.

[0087] As a specific embodiment, the best phase of the first scanning data is selected and determined, and the best phase of the first scanning data is recorded as the reference reconstruction phase corresponding to multiple scanning data, and the reconstruction phase corresponding to each scanning data is determined based on the reference reconstruction phase.

[0088] The best phase of the first scan data is directly used as the reconstruction phase. If the best phase of the first scan data is the best systolic phase, the best phase of the second scan data is also selected as the corresponding best systolic phase. If the best phase of the first scan data is the best diastolic phase, the best phase of the second scan data is also selected as the corresponding best diastolic phase.

[0089] The best phase of the second scan also selects the corresponding best phase (best systole or best diastole). The reconstructed phase of the first scan and the best phase and nearby phases of the second scan are used to reconstruct the overlapping part of the images of the two adjacent scans. The matching degree of the best phase and nearby phases of the second scan and the overlapping part of the image of the first scan is calculated respectively. The phase with the largest matching degree in the second scan is the phase that best matches the first scan and is used as the reconstructed phase of the second scan data.

[0090] Similarly, the reconstructed phase of the second scan and the best phase and nearby phases of the third scan are used to reconstruct the overlapping image parts of the two adjacent scans, and the matching degree of the best phase and nearby phases of the third scan and the overlapping image parts of the second scan are calculated respectively. The phase with the largest matching degree in the third scan is the phase that best matches the second scan and is used as the reconstructed phase of the third scan.

[0091] The embodiment of the present invention helps to match the phase with good image effect by identifying the heartbeat cycle and the best diastolic period and / or the best systolic period of each scan, thereby reducing the number of phase matching times.

[0092] The above specific embodiments can be obtained as follows Figure 5 The phase image is reconstructed from multiple scanning data. Figure 5 1, 2, 3 are images of the first scan data reconstruction phase, 4, 5, 6 are images of the second scan data reconstruction phase, 7, 8, 9 are images of the third scan data reconstruction phase. Among them, 3 and 4 are images of the reconstruction phase of the overlapping area of ​​the first scan and the second scan, and 6 and 7 are images of the reconstruction phase of the overlapping area of ​​the second scan and the third scan.

[0093] In the embodiment of the present invention, the phase interval between the optimal phase and the phases near it, and the phase interval between the adjacent phases and the optimal phase can be set to 3%, and the number of adjacent phases can be 2 on each side of the optimal phase. The embodiment of the present invention does not limit the phase interval between the adjacent phases and the optimal phase, nor does it limit the number of adjacent phases.

[0094] By adopting the scanning imaging method of the embodiment of the present invention, no matter how long the scanning length is, it can be covered by moving the scanning bed step by step scanning multiple times, and the reconstruction phase of each scanning can be found, such as Figure 6 As shown, the squares represent images of different phases of the overlapping part of each scan with the adjacent scans, and the dotted box is the found reconstruction phase.

[0095] The embodiment of the present invention determines the reconstruction phase by using a step-by-step matching method of the reconstruction phases of multiple step scans for scanning of any length without ECG gating. Specifically, the phases are matched step by step from the first scan to the next: the best phase of the first scan is matched with the best phase and nearby phases of the second scan, and the reconstruction phase of the second scan is found; the reconstruction phase of the second scan is matched with the best phase and nearby phases of the third scan, and the reconstruction phase of the third scan is found, and so on, until all the sub-scan data of the target area are scanned and covered.

[0096] In another possible embodiment of the present invention, Figure 7 As shown, determining the reconstruction phase corresponding to each scan data according to the matching degree of the overlapping area of ​​two adjacent scan data may include:

[0097] S501, reconstructing images corresponding to each period of the multiple scan data according to scan data segments corresponding to each period of the multiple scan data;

[0098] S502, calculating the matching degree of the overlapping area of ​​the image corresponding to each phase of two adjacent scanning data, and recording the phase corresponding to the maximum matching degree as the same reconstruction phase corresponding to the two adjacent scanning data.

[0099] This embodiment does not set a reference reconstruction phase, but calculates the matching degree of the overlapping area of ​​two adjacent scan data, and records the phase corresponding to the maximum matching degree as the same reconstruction phase corresponding to the two adjacent scan data.

[0100] Specifically, the images corresponding to each phase of the multiple scanning data are directly reconstructed based on the scanning data segments corresponding to each phase of the multiple scanning data. The matching degree of the overlapping area of ​​the images corresponding to each phase of two adjacent scanning data is calculated, and the phase corresponding to the maximum matching degree is recorded as the same reconstructed phase corresponding to the two adjacent scanning data.

[0101] In one embodiment of the present invention, the scanning imaging method further comprises:

[0102] If the multiple scan data include scan data not including the heart region, any phase of the scan data not including the heart region is recorded as a corresponding reconstruction phase of the scan data not including the heart region.

[0103] During the scanning process, the doctor may scan a wider area than the heart area, for example, including the liver area. If the scan data does not include the scan data of the heart area, it is not necessary to calculate the matching degree with the overlapping images of the adjacent scans, and any phase of the scan data, such as the starting phase, can be directly used as the reconstruction phase. If the scan data includes the scan data of the heart area, it is necessary to calculate the matching degree of the overlapping area of ​​the images corresponding to each phase of the scan data and the images corresponding to the reconstruction phase determined by the adjacent scan data. The judgment of whether the scan data of the heart area is included in the multiple scan data can be uniformly judged after acquiring the multiple scan data, and then the matching degree of the scan data including the heart area is calculated, or the scan data of the current scan data can be judged during the process of calculating the matching degree of the multiple scan data. The scan data not including the heart area can be all of the scan data of the current scan, or it can be part of the scan data of the current scan, that is, the scan data of the current scan can completely not include the heart area in the Z direction, or it can include part of the heart area in the Z direction, and the scan data of the current scan is any one of the multiple scan data. The scan data not including the heart area generally appears in the start and end scan data of the multiple scan data.

[0104] Whether the scan data includes the heart area can be determined in the following ways:

[0105] In one example, whether the scan data includes the heart region can be determined by imaging any phase of the scan data at multiple positions in the Z direction, and judging whether the heart region is included based on the image obtained by imaging. Specifically, the image obtained by imaging can be input into the heart recognition model. The Z direction is the moving direction of the scanning bed for multiple movements, that is, the stepping direction of the scanning bed.

[0106] In another example, in the localizer scan, the bed code position that does not include the heart area can be identified, and whether the heart area is included is determined based on the bed code position corresponding to the scan data. The localizer, also known as the flat film, is an image used to locate the target area before the step scan.

[0107] In the embodiment of the present invention, for the scan data of the non-cardiac part without motion, there is no need to calculate the matching degree of the overlapping area, and the phase corresponding to the initial data can be used as the reconstructed phase of the scan.

[0108] In one embodiment of the present invention, Figure 8As shown, imaging is performed according to the target data segment corresponding to each scan data reconstruction period to obtain a regional image of the target area, including:

[0109] S601, selecting a target data segment corresponding to each scan data according to a reconstruction period of each scan data;

[0110] S602: Perform image processing according to each target data segment to obtain a regional image of the target area.

[0111] Specifically, according to each scan data reconstruction period, a target data segment corresponding to each scan data is selected, and imaging is performed according to each target data segment, which can ensure that the heartbeat states corresponding to each target data segment used during imaging are consistent, thereby reducing the staggered phenomenon of the image obtained by imaging.

[0112] In one embodiment of the present invention, the scanning imaging method may further include: performing non-rigid registration processing and image fusion processing on adjacent overlapping areas in the regional image.

[0113] Specifically, although the most consistent phase of two adjacent scans has been selected through matching calculation, in order to achieve better results, the overlapping area images of the two scans are subjected to non-rigid registration with decomposition weights and image fusion techniques that assign different weights according to the overlapping positions are used to further weaken the discontinuity of the staggered layers and improve the image quality of the obtained regional images.

[0114] The scanning imaging method of the embodiment of the present invention does not use electrocardiogram signals, performs heart scans of any scanning length without electrocardiogram gating, covers at least one heartbeat cycle at each position, identifies the motion state of the heart data scanned at each position, marks the range of diastole and systole, finds the best phase in the scanned data at each position, and classifies them into the best diastole and the best systole; the best phase and its adjacent phases are used to image the overlapping part of two adjacent scans, the matching degree of the overlapping images is calculated, and the best matching phase of the two scans is found; finally, the data at each position is imaged using the best matching phase, adjacent images are registered and fused, and motion compensation is enabled.

[0115] The scanning imaging method of the embodiment of the present invention is not limited by the width of the detector. By moving the scanning bed for multiple step scans, a non-ECG-gated heart scan of any length can be scanned. By calculating the degree of image matching between the overlapping parts of two adjacent scans, the reconstruction phase that best matches the overlapping part of the adjacent scans in each scan is found, and the reconstruction phase of each scan is obtained. The image is built according to the target data segment corresponding to the reconstruction phase of each scan data, and the regional image of the target area is obtained. The non-ECG-gated scanning is not limited by the scan length, adapts to more clinical application scenarios, and allows more products to support non-ECG-gated scanning.

[0116] The invention provides a scanning imaging device.

[0117] Fig. 9 FIG. 1 is a schematic diagram of a scanning imaging device according to an embodiment of the present invention. Fig. 9 As shown, the scanning imaging device 100 includes an acquisition module 10 , a determination module 20 and an imaging module 30 .

[0118] Among them, the acquisition module 10 is used to obtain multiple scanning data obtained by performing multiple scans on the target area, wherein the number of scans is greater than 1; the determination module 20 is used to determine the reconstruction period corresponding to each scanning data according to the matching degree of the overlapping area of ​​two adjacent scanning data; the imaging module 30 is used to perform imaging according to the target data segment corresponding to the reconstruction period of each scanning data to obtain a regional image of the target area.

[0119] It should be noted that, for other specific implementations of the scanning imaging device provided in the embodiment of the present invention, reference may be made to other specific implementations of the scanning imaging method in the above embodiment of the present invention.

[0120] The scanning imaging device of the embodiment of the present invention is not limited by the width of the detector. By moving the scanning bed for multiple step scans, it can scan a non-ECG-gated heart scan of any length. By calculating the degree of image matching between the overlapping parts of two adjacent scans, the reconstruction phase that best matches the overlapping part of the adjacent scans in each scan is found, and the reconstruction phase of each scan is obtained. The image is built according to the target data segment corresponding to the reconstruction phase of each scan data, and the regional image of the target area is obtained. The non-ECG-gated scanning is not limited by the scan length, adapts to more clinical application scenarios, and allows more products to support non-ECG-gated scanning.

[0121] The present invention provides a computer-readable storage medium.

[0122] In this embodiment, a computer program is stored on a computer-readable storage medium, wherein when the computer program is executed by a processor, the above-mentioned scanning and imaging method is implemented.

[0123] The invention provides a scanning device.

[0124] In this embodiment, the scanning device includes a memory and a processor. The memory stores a computer program. The computer program is characterized in that when the computer program is executed by the processor, the above-mentioned scanning imaging method is implemented.

[0125] Fig.10 4 is a structural block diagram of a scanning device according to an embodiment of the present invention.

[0126] like Fig.10As shown, the scanning device 500 includes: a processor 501 and a memory 503. The processor 501 and the memory 503 are connected, such as through a bus 502. Optionally, the scanning device 500 may also include a transceiver 504. It should be noted that in actual applications, the transceiver 504 is not limited to one, and the structure of the scanning device 500 does not constitute a limitation on the embodiments of the present invention.

[0127] Processor 501 may be a CPU (Central Processing Unit), a general purpose processor, a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), an FPGA (Field Programmable Gate Array) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It may implement or execute various exemplary logic blocks, modules and circuits described in conjunction with the disclosure of the present invention. Processor 501 may also be a combination that implements computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0128] The bus 502 may include a path to transmit information between the above components. The bus 502 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. The bus 502 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig.10 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0129] The memory 503 is used to store a computer program corresponding to the scanning imaging method of the above embodiment of the present invention, and the computer program is controlled and executed by the processor 501. The processor 501 is used to execute the computer program stored in the memory 503 to implement the contents shown in the above method embodiment. Fig.10 The scanning device 500 shown is only an example and should not bring any limitation to the functions and scope of use of the embodiments of the present invention.

[0130] The computer-readable storage medium and scanning device of the embodiments of the present invention, based on the above scanning imaging method, realize non-ECG gating scanning without being limited by the scanning length, adapt to more clinical application scenarios, and allow more products to support non-ECG gating scanning.

[0131] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in combination with these instruction execution systems, devices or apparatuses. For the purposes of this specification, "computer-readable medium" can be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in combination with these instruction execution systems, devices or apparatuses. More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection portion with one or more wirings (electronic device), a portable computer disk box (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing in other suitable ways if necessary, and then stored in a computer memory.

[0132] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, a plurality of steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or their combination: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0133] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0134] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0135] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0136] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0137] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0138] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A scanning imaging method, characterized in that: The method comprises: Acquire multiple scan data obtained by performing multiple scans on the target area, wherein the number of scans is greater than 1; Determine the reconstruction phase corresponding to each scan data according to the matching degree of the overlapping area of ​​two adjacent scan data; An image is constructed according to the target data segments corresponding to the reconstruction period of each scanning data to obtain a regional image of the target area.

2. The scanning imaging method according to claim 1, characterized in that: The step of determining the reconstruction phase corresponding to each scan data according to the matching degree of the overlapping area of ​​two adjacent scan data includes: Determine an optimal phase according to any scan data of the multiple scan data, and record it as a reference reconstruction phase corresponding to the multiple scan data; reconstructing images corresponding to each period of other scanning data in the multiple scanning data according to scanning data segments corresponding to each period of other scanning data; Taking the reference reconstruction phase as the starting point, the matching degree of the overlapping area between the image corresponding to each phase of the current scanning data and the image corresponding to the determined reconstruction phase of the adjacent scanning data is calculated in sequence, and the phase corresponding to the maximum matching degree is recorded as the reconstruction phase corresponding to the current scanning data.

3. The scanning imaging method according to claim 1, characterized in that: The step of determining the reconstruction phase corresponding to each scan data according to the matching degree of the overlapping area of ​​two adjacent scan data includes: Determine an optimal phase according to any scan data of the multiple scan data, and record it as a reference reconstruction phase corresponding to the multiple scan data; Determine, according to the reference reconstruction phase, a reference target phase and its neighboring phases corresponding to other scanning data in the multiple scanning data, and reconstruct images corresponding to the reference target phase and its neighboring phases of the other scanning data; Taking the reference reconstruction phase as the starting point, calculate in sequence the matching degree of the overlapping areas of the reference target phase of the current scanning data and the images corresponding to its nearby phases and the images corresponding to the determined reconstruction phases of its adjacent scanning data, and record the phase corresponding to the maximum matching degree as the reconstruction phase corresponding to the current scanning data.

4. The scanning imaging method according to claim 1, characterized in that: The step of determining the reconstruction phase corresponding to each scan data according to the matching degree of the overlapping area of ​​two adjacent scan data includes: reconstructing images corresponding to each period of the multiple scan data according to the scan data segments corresponding to each period of the multiple scan data; The matching degree of the overlapping area of ​​the image corresponding to each phase of two adjacent scanning data is calculated, and the phase corresponding to the maximum matching degree is recorded as the same reconstruction phase corresponding to the two adjacent scanning data.

5. The scanning imaging method according to any one of claims 1 to 4, characterized in that: The matching degree of the overlapping area of ​​two adjacent scan data includes: The matching degree of the two-dimensional images at the same position in the image overlap area of ​​two adjacent scan data; or The matching degree of the three-dimensional image sequence at the same position in the image overlapping area of ​​two adjacent scan data.

6. The scanning imaging method according to any one of claims 1 to 4, characterized in that: Also includes: If the multiple scan data include scan data not including the heart region, any phase of the scan data not including the heart region is recorded as a corresponding reconstruction phase of the scan data not including the heart region.

7. The scanning imaging method according to any one of claims 1 to 4, characterized in that: The step of constructing an image according to the target data segments corresponding to the reconstruction period of each scanning data to obtain a regional image of the target area includes: Selecting a target data segment corresponding to each scan data according to a reconstruction phase corresponding to each scan data; Image processing is performed according to each of the target data segments to obtain a regional image of the target area.

8. The scanning imaging method according to any one of claims 1 to 4, characterized in that: Before acquiring the multiple scan data obtained by performing multiple scans on the target area, the method further includes: Determine a preset maximum scan time and a preset minimum scan time, wherein the preset maximum scan time and the preset minimum scan time are determined by a heartbeat cycle corresponding to an average heart rate within a preset time range of fluctuation above and below; The method further comprises: During each scanning process, if it is determined according to the identified cardiac motion stage that the scanning does not cover the target heartbeat range, the current scanning is terminated when the actual scanning time reaches the preset maximum scanning time; If it is determined based on the identified cardiac motion stage that the scan has covered the target heartbeat range, and the actual scan duration is less than the preset minimum scan duration, the scan is terminated when the actual scan duration reaches the preset minimum scan duration.

9. The scanning imaging method according to any one of claims 1 to 4, characterized in that: The method comprises: The target area is scanned without ECG gating.

10. A scanning imaging device, characterized in that: The device comprises: An acquisition module, used to acquire multiple scan data obtained by performing multiple scans on the target area, wherein the number of scans is greater than 1; A determination module, used to determine the reconstruction phase corresponding to each scan data according to the matching degree of the overlapping area of ​​two adjacent scan data; The imaging module is used to perform imaging according to the target data segments corresponding to the reconstruction period of each scanning data to obtain a regional image of the target area.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the scanning imaging method according to any one of claims 1 to 9 is implemented.

12. A scanning device, comprising a memory and a processor, wherein a computer program is stored in the memory, wherein: When the computer program is executed by the processor, the scanning imaging method according to any one of claims 1 to 9 is implemented.

Images