CN109330594B - Method for obtaining parameters of saturation band, spectral imaging method, system and medium - Google Patents
Method for obtaining parameters of saturation band, spectral imaging method, system and medium Download PDFInfo
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Abstract
The invention relates to a method of acquiring parameters of a saturation band, a magnetic resonance spectroscopy scanning imaging method, a magnetic resonance system and a computer readable storage medium. According to the method for acquiring the parameters of the saturation zone, the magnetic resonance image is acquired, the fat area and the region of interest are further acquired, the saturation zone is generated, the fat area can be covered by the saturation zone, and finally the parameters of the saturation zone are acquired. The generation difficulty of the saturation band is greatly reduced, and the step of acquiring the parameters of the saturation band is simplified, so that the workload of doctors is reduced, and the working efficiency of the doctors is improved.
Description
Technical Field
The present invention relates to the field of magnetic resonance spectroscopy, and in particular to a method of acquiring parameters of a saturation band, a magnetic resonance spectroscopy scanning imaging method, a magnetic resonance system and a computer readable storage medium.
Background
With the continuous progress of society, the medical requirements of people on magnetic resonance are more and more. However, in magnetic resonance spectroscopy, fat signals outside the region of interest contaminate the spectroscopic signals within the region of interest due to fat signal chemical shifts. Therefore, it is desirable to set a saturation band around the region of interest before the magnetic resonance spectroscopy scan to suppress the fat signal so that the fat signal covered by the saturation band region does not contaminate the magnetic resonance spectroscopy lines.
The traditional method for acquiring the parameters of the saturation zone is to manually set one or more saturation zones by a doctor and acquire the corresponding parameters of the saturation zone. However, this operation method requires precise operation and is very cumbersome, which increases the workload of the doctor and reduces the work efficiency.
Disclosure of Invention
Based on this, it is necessary to provide a method of acquiring parameters of a saturation band, a magnetic resonance system, and a computer-readable storage medium for solving the problem that the steps of acquiring parameters of a saturation band are cumbersome.
A method of obtaining parameters of a saturation band, the method comprising:
acquiring a magnetic resonance image of a part to be scanned, wherein the magnetic resonance image comprises a fat area;
acquiring an interested area of the part to be scanned;
generating a saturation band based on the region of interest, the saturation band covering at least a portion of the fat region;
acquiring parameters of the saturation band;
wherein the parameters of the saturation band are used for enabling a magnetic resonance system to carry out magnetic resonance scanning on the part to be scanned.
In one embodiment, the acquiring the magnetic resonance image of the part to be scanned includes:
acquiring a fat image of a part to be scanned based on a pre-scanning imaging sequence, wherein the pre-scanning imaging sequence comprises any one of the following: a DIXON water-fat separation sequence, a water signal suppression pulse sequence, or a fat frequency selective excitation pulse sequence.
In one embodiment, the method further comprises the following steps:
judging whether the saturation zone and the region of interest have an overlapping area;
and if the saturation band and the region of interest have an overlapping region, adjusting the saturation band so that the saturation band does not overlap the region of interest.
In one embodiment, the saturation band has a plurality of bands, and the method further comprises:
judging whether each adjusted saturation band has an overlapping region with the fat region;
wherein the adjusted saturation band having no overlapping region with the fat region is deleted.
In one embodiment, the saturation band comprises a first saturation band; the generating of the saturation band based on the region of interest includes:
acquiring the outline of the region of interest;
generating a polygonal contour line based on the contour of the region of interest; and
and generating the first saturation band outside the region of interest along the direction parallel to each edge of the contour line respectively.
In one embodiment, the saturation band further includes a second saturation band, and the generating the first saturation band outside the region of interest includes:
determining whether the first saturation zone completely covers the fat region;
generating a second saturation band if the first saturation band does not completely cover the fat region;
wherein the second saturation band is configured to cover a fat region exposed by the first saturation band.
In one embodiment, the generating a second saturation band if the first saturation band cannot completely cover the fat region includes:
and if the first saturated zone can not completely cover the fat area, generating second saturated zones along the directions which form 45-degree angles with the edges of the contour line respectively.
A magnetic resonance spectroscopy scanning imaging method comprising:
acquiring parameters of a saturation band by using the method for acquiring the parameters of the saturation band; and
a magnetic resonance spectroscopy scan is performed using the parameters of the saturation band to acquire a magnetic resonance spectroscopy scan image.
A magnetic resonance system comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the above-mentioned method of acquiring parameters of the saturation band when executing the computer program.
A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program realizes the steps of the above-mentioned method when executed by a processor. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the above-mentioned method of acquiring parameters of a saturation band.
According to the method for acquiring the parameters of the saturation band, the magnetic resonance spectrum scanning imaging method, the magnetic resonance system and the computer readable storage medium, the magnetic resonance image is acquired, the fat area and the region of interest are further acquired, the saturation band is generated to cover the fat area, and finally the parameters of the saturation band are acquired. The generation difficulty of the saturation band is greatly reduced, and the step of acquiring the parameters of the saturation band is simplified, so that the workload of doctors is reduced, and the working efficiency of the doctors is improved.
Drawings
Figure 1 is a schematic diagram of an embodiment of a magnetic resonance system;
FIG. 2 is an internal structural view of an image processing apparatus unit;
FIG. 3 is a flowchart illustrating a method for obtaining parameters of a saturation band in one embodiment;
FIG. 4 is a diagram of an example MR image;
FIG. 5 is a diagram of an MR image in another embodiment
FIG. 6 is a schematic diagram of the generation of a saturation band in one embodiment;
FIG. 7 is a schematic representation of the saturation band of FIG. 6 completely covering the fat region;
FIG. 8 is a schematic diagram of an embodiment in which a saturation zone overlaps a region of interest;
FIG. 9 is a schematic illustration of the adjustment of the saturation band of FIG. 8;
FIG. 10 is a flowchart illustrating a method for obtaining parameters of a saturation band in an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Figure 1 is a schematic diagram of an embodiment of a magnetic resonance system. As shown in fig. 1, the system may include a medical scanning imaging device 11, a region of interest acquisition unit 12, a saturation band processing unit 13, and a parameter acquisition unit 15, which are communicatively connected.
Further, the medical scanning imaging apparatus 11 includes a frame 111 and a scanning bed 112, wherein the frame 111 has a scanning space 110; after the patient 10 is fixed on the bed 112, the bed 112 can be moved to enter the scanning space 110, so that the pre-defined region (not shown) to be scanned on the patient 10 is completely placed in the scanning space 110. Different magnetic resonance scanning sequences can then be used for magnetic resonance imaging of the region to be scanned. For example, in a spectroscopic scan, a pre-scan imaging sequence may be generated to obtain an image of a region of fat at a site to be scanned. In other embodiments, an image segmentation algorithm such as the metribuzin threshold selection method may also be used to perform image segmentation on the magnetic resonance image based on the obtained magnetic resonance image, so as to obtain the corresponding fat region.
After the medical imaging unit 11 acquires the magnetic resonance image, a doctor can define an enclosed area on the image by experience, and the region-of-interest acquiring unit 12 acquires position information of the enclosed area and stores the position information as a region of interest. Further, the saturation band processing unit 13 may generate a saturation band on the above-mentioned fat region so that the generated saturation band covers at least a part of the fat region. Further, the parameter acquisition unit 15 may acquire the parameters of the saturation band.
With continued reference to fig. 1, in some embodiments, the system may further include a saturation band adjustment unit 14. After the saturation band generated by the saturation band processing unit 13 completely covers the fat region or at least partially covers the fat region, the saturation band detecting unit 14 may start a determination process to determine whether the saturation band currently existing on the magnetic resonance image overlaps with the region of interest. And if the judgment result is that the saturation zone is not overlapped, determining that the currently obtained saturation zone can cover the fat area and cannot be overlapped with the region of interest. At this time, the parameters of all the currently obtained saturation bands may be acquired via the parameter acquisition unit 15. The parameters of the saturation band may be used for the above-mentioned spectral scanning of the region to be scanned to completely suppress the fat signal present at the region to be scanned at the time of the spectral scanning, so that problems such as chemical shift which is easily caused by the presence of the fat signal can be avoided.
However, in some embodiments, if the saturation band detecting unit 14 detects that the currently existing saturation band partially overlaps with the region of interest, the saturation band processing unit 13 may be triggered to adjust the currently existing saturation band to ensure that the saturation band does not cover the region of interest; subsequently, the saturation band detecting unit 14 may detect again whether the adjusted saturation band can completely cover the fat region, and if the detection result indicates that the saturation band can completely cover, the parameter acquiring unit 15 may acquire the parameters of all the current saturation bands.
In some embodiments, the above-mentioned region of interest acquisition unit 12, saturation band processing unit 13, saturation band detection unit 14 and parameter acquisition unit 15 may be integrated on the same electronic device, such as an image processing unit. Referring to fig. 2, fig. 2 is an internal structure diagram of the image processing unit. As shown in fig. 2, the image processing unit described above may include components such as a processor, a nonvolatile storage medium, an internal memory, a communication interface, a display device, and an input device, which are connected by a system bus. The processor described above may be used to provide computing and control functions to support the operation of the entire operating console. A non-volatile storage medium may have stored therein a type of operating system such as Unix or Windows. The internal memory may provide a running environment for an operating system in the non-volatile storage medium, and the internal memory may store computer readable instructions, and when the computer readable instructions are executed by the processor, the processor may be caused to execute a method for obtaining parameters of the saturation band. The communication interface can be used for connecting with the scanning frame and communication, such as sending control instructions to the scanning frame, uploading and downloading image quality parameters and the like. The display device can be a liquid crystal display screen or an electronic ink display screen; the input device may be a touch layer covered on a display screen, or may be a physical key, a trackball, or a touch panel provided on a computer device, or may be an external device such as a physical keyboard, a virtual keyboard, a touch pad, or a mouse. Those skilled in the art will appreciate that the structure shown in fig. 2 is only a block diagram of a part of the structure related to the present application, and does not constitute a limitation of the client device to which the present application is applied, and a specific client device may include more or less components than those shown in the figure, or combine some components, or have different component arrangements.
The present embodiment provides a method for acquiring parameters of a saturation band, which is applied to the magnetic resonance system. Fig. 3 is a flow chart illustrating a method for obtaining parameters of a saturation band in one embodiment, which may include the following steps, as shown in fig. 3:
in step S1, a magnetic resonance image of the region to be scanned is acquired, the magnetic resonance image including a fat region.
Specifically, the part of the patient to be scanned may be subjected to magnetic resonance spectroscopy, wherein a pre-scan imaging sequence may be used during the spectroscopy, through which a fat signal may be excited, such that the fat signal fed back by the fat in the region to be scanned is relatively strong. Also, in the obtained magnetic resonance image, there are fat regions and non-fat regions.
In some embodiments, the pre-scan imaging sequence may include a DIXON water-fat separation sequence, a water signal suppression pulse sequence, and a fat frequency selective excitation pulse sequence. In this embodiment, the pre-scan imaging sequence selects a DIXON water-fat separation sequence that is insensitive to magnetic field inhomogeneity, and even if the magnetic field distribution in the scan volume of the magnetic resonance system is not uniform, a high quality fat image can be obtained by applying the DIXON water-fat separation sequence during the spectral scan. In addition, compared with the prior art that the fat region is determined from the magnetic resonance image by using an image segmentation method, the fat position determined by using the DIXON water-fat separation sequence in the embodiment is more accurate.
Step S2, a region of interest of the part to be scanned is acquired.
Specifically, fig. 4 is a schematic diagram of a magnetic resonance image in an embodiment, as shown in fig. 4, fat tissue regions and brain tissue regions are distributed on the magnetic resonance image, and a rectangular region of interest is marked in the brain tissue regions.
Figure 5 is a schematic illustration of a magnetic resonance image in another embodiment. As shown in fig. 5, the gray-level value of the pixel point occupied by the fat region in the magnetic resonance image can be represented by "1", and the gray-level value of the pixel point occupied by the non-fat region in the magnetic resonance image can be represented by "0". In some embodiments, the physician may empirically select an arbitrary region in the non-fat region as the region of interest (e.g., a rectangular region as shown in the figure), wherein the region of interest refers to an image region in the magnetic resonance image that the physician considers to have a positive effect on the diagnosis of the patient.
In step S3, a saturation band is generated based on the region of interest, the saturation band covering at least a portion of the fat region.
Specifically, after passing through step S2, the fat region and the region of interest may be obtained simultaneously. In order to saturate the fat signals emitted by the fat in the region of the patient to be scanned during the spectroscopic imaging process, it is necessary to cover the fat region with a saturation band.
FIG. 6 is a schematic illustration of the generation of a saturation band in one embodiment, as shown in FIG. 6, and in some embodiments the initially generated saturation band may be generally rectangular in shape of infinite length. The boundary lines of the region of interest (i.e. the four boundary lines of the square region in fig. 5) may be obtained first, and four saturation zones a1, a2, A3, a4 (i.e. the hatched regions shown in the figure) are generated along the four sides of the rectangle respectively. Taking the saturation band a1 as an example, the gray value of the pixel point in each region can be checked in the region where the saturation band a1 is located, and if there is a pixel point whose gray value is "1", it can be determined that the saturation band a1 covers the fat region; on the contrary, if there is no pixel point with gray value "1" in the region, it may be determined that the saturation band a1 does not cover the fat region, and at this time, the saturation band may be deleted. In this embodiment, a1, a2, A3 and a4 all cover part of the fat region, so that the parameters of each saturation band (such as the width of the saturation band) can be further adjusted.
Fig. 7 is a schematic diagram of the fat region completely covered by the saturation band in fig. 6, as shown in fig. 7, in some embodiments, parameters of a1, a2, A3, and a4 may be adjusted simultaneously, for example, the length of one pixel point is extended in a direction away from the boundary of the region of interest each time, and after each extension, the pixel point in each column on the magnetic resonance image may be detected, and it is determined whether there is still a pixel point with a gray value of "1" that does not fall into the region covered by the four saturation bands, and if all the pixel points with a gray value of "1" are covered, it may be determined that the fat region on the magnetic resonance image is completely covered by the saturation band. However, it will be appreciated by those skilled in the art that the initially set saturation bands may be of any number and may be generated in any manner on the magnetic resonance image. In addition, the manner of adjusting the saturation bands is not limited to the manner mentioned in this embodiment, for example, in some embodiments, when it is detected that there is a partial fat region that does not fall into the region covered by the saturation bands, one saturation band may be respectively added to each of the sides of the four corners of the rectangular region of interest that is away from the region of interest, and each newly added saturation band may respectively form an angle of 45 degrees with the four sides of the rectangular region of interest, and the magnetic resonance image may be checked again, and if there is a partial fat region that is not covered, a saturation band may be generated again in the fat region that is not covered until all the fat regions on the magnetic resonance image are covered by the saturation bands existing on the current magnetic resonance image.
Step S4: parameters of the saturation band are obtained.
In particular, after the saturation band has been generated and adjusted, parameters of the saturation band may be acquired for the magnetic resonance system to perform a magnetic resonance spectroscopy scan of the region to be scanned.
According to the method for acquiring the parameters of the saturation zone, the magnetic resonance image is acquired, the fat area and the region of interest are further acquired, the saturation zone is generated, the fat area can be covered by the saturation zone, and finally the parameters of the saturation zone are acquired. The generation difficulty of the saturation band is greatly reduced, and the step of acquiring the parameters of the saturation band is simplified, so that the workload of doctors is reduced, and the working efficiency of the doctors is improved.
In some embodiments, it may be further determined whether the saturation zone overlaps with the region of interest; and if the saturation band does not overlap with the region of interest, acquiring parameters of the saturation band.
Since the image of the region of interest is a key image required for diagnosing a patient, it is necessary to ensure that the saturation zone does not overlap the region of interest as much as possible.
Specifically, whether each pixel point located on the boundary of the region of interest falls into the region covered by the saturation band or not can be sequentially judged, and if a certain pixel point is covered by a certain saturation band, the parameter of the saturation band can be adjusted, so that the saturation band does not contain any pixel point any more. In some embodiments, the determining method may be to take any one pixel point, determine whether the pixel point is on the same side of any two opposite sides of each saturation band, and if the pixel point is on the same side, determine that the pixel point is not covered by the saturation band. With continued reference to fig. 7, if each pixel point on the boundary of the region of interest is located on the same side of the saturation bands a1, a2, A3, a4, i.e., the boundary of the region of interest does not fall into the region covered by the saturation bands, it can be determined that the entire region of interest is not covered by the saturation bands. At this time, it can be determined that the saturation band covers both the fat region and the region of interest, and the requirements of the magnetic resonance spectroscopy scan are met. Parameters of the saturation bands a1, a2, A3, a4 on the magnetic resonance image may be acquired for subsequent magnetic resonance spectroscopy scans.
Based on the method for obtaining the parameter of the saturation band in the foregoing embodiments, in some embodiments, if there is a pixel point in the region of interest covered by the saturation band, the saturation band may be further adjusted, so that the saturation band is not overlapped with the region of interest.
FIG. 8 is a schematic diagram of an embodiment in which a saturation zone overlaps a region of interest. As shown in fig. 8, the magnetic resonance image is overlaid with a saturation band C1 (i.e. the shaded area shown in the figure), the saturation band C1 has been configured to completely overlay the fat area (i.e. the area occupied by "1" in fig. 8) on the magnetic resonance image, however, when detecting whether the saturation band C1 overlaps the region of interest, it is found that the pixel points C1, C2 in the region of interest (i.e. the square area shown in the figure) are in the area covered by the saturation band, and at this time, the parameters of the saturation band C1 can be adjusted. Fig. 9 is a schematic diagram of adjusting the saturation band in fig. 8. As shown in fig. 9, the parameters of the saturation band C1 may be continuously adjusted so that it no longer overlaps the region of interest.
However, with continued reference to fig. 9, the saturation band C1 may no longer completely cover the fat region during the continuous adjustment process. At this time, a new saturation band C2 may be generated such that the saturation band C2 covers the fat region missed by the previous saturation band C1. In other embodiments, the saturation band may be deleted if it no longer covers the fat region during the continuous adjustment, i.e. there is no overlap with the fat region.
Further, since a new saturation band is generated, it is necessary to further detect whether the saturation band C2 overlaps with the region of interest. In this embodiment, it can be detected that all the pixel points in the region of interest are not in the region covered by the saturation band C2. Thus, it can be determined that the saturation band C1 and the saturation band C2 both completely cover the fat region and do not overlap the region of interest, and the parameters of the saturation band C1 and the saturation band C2 can be further acquired for subsequent magnetic resonance spectroscopy scans.
However, in some embodiments, if the saturation band C2 is determined to overlap with the region of interest, the parameters thereof may be adjusted so that the saturation band C2 no longer covers any pixel point in the region of interest. Further, in some embodiments, it may be detected whether the saturation bands C1 and C2 are also able to completely cover fat regions on the magnetic resonance image, and if so, parameters of the saturation bands C1 and C2 may be acquired for a subsequent magnetic resonance spectroscopy scan. However, if the saturated bands C1 and C2 do not completely cover the fat region, a saturated band C3 may be further generated. The subsequent operation of C3 is similar to that in the above embodiment and will not be described again. The operations in the above embodiments may be cycled through until all the saturation bands on the magnetic resonance image are able to cover all the fat regions without overlapping the region of interest. At this point, the parameters of all saturation bands currently present may be acquired for subsequent magnetic resonance spectroscopy scans.
Alternatively, the parameters of the saturation band in the embodiment of the present invention may include an application position of the saturation pulse and an application direction of the saturation pulse. The saturation pulse sequence can be determined according to the parameters of the saturation band, so that the scanning sequence comprising the saturation pulse sequence and the imaging sequence is determined. It will be appreciated that a saturation pulse sequence should be applied before the imaging sequence so that the acquisition of the region of interest signals is performed with the fat signals suppressed.
Based on the magnetic resonance system in the foregoing embodiment, the present embodiment further provides a specific method for acquiring parameters of a saturation band. FIG. 10 is a flow diagram of a method for obtaining parameters for a saturation band in an exemplary embodiment. As shown in fig. 10, the method may include the steps of:
step S20: patient registration information is recorded, a DICOM file is generated and stored in the magnetic resonance system.
Specifically, before the magnetic resonance spectroscopy scan is performed on the patient, a physical examination needs to be performed on the patient, various physiological parameters are examined, for example, it is determined that the patient can be scanned, a portion of the patient that needs to be scanned is determined, registration information of the patient can be entered, and a Digital Imaging and Communications in Medicine (DICOM) file storing the registration information of the patient is generated, where the DICOM file includes information of the portion of the patient that needs to be scanned, where the portion that needs to be scanned may be one or more, for example, the portion of the Imaging object to be scanned in this embodiment may be the thoracic cavity.
Step S21: the patient is fixed at a designated position on the scanning bed.
In particular, the patient should be firmly fixed to the bed, not subject to displacement during the scanning process, and not be subjected to any metal-carrying object before the patient is subjected to the magnetic resonance spectroscopy.
Step S22: a magnetic resonance image of a region to be scanned is acquired.
In particular, the scanning bed may be controlled to move to the scanning space for scanning, wherein the water-fat separation technique of the DIXON method may be used to acquire a high quality magnetic resonance image containing a fat region, which is typically a pre-scan image.
Step S23: a fat region and a region of interest are acquired.
Specifically, the fat region and the non-fat region may be determined in the pre-scan image by an image segmentation algorithm such as the great jin threshold value selection method, or a water-fat separation technique. The segmented result can then be displayed on a display and the physician or technician can delineate any of the non-fat regions as a region of interest.
Step S24: a saturation band is generated such that the saturation band completely covers the fat area.
In particular, one or more saturation bands may be generated on the magnetic resonance image and enable the saturation band region to completely cover the fat region. The specific generation steps are similar to those in the above embodiments, and are not described herein again.
Step S25: and judging whether the saturation zone is overlapped with the region of interest.
Specifically, the pixel points in each region of interest can be sequentially checked to determine whether the pixel points are covered by the saturation band. If each saturation band does not cover the region of interest, it can be determined that the obtained saturation band can completely cover the fat region and does not overlap with the region of interest, and then the process can proceed to step S28. However, if there is an overlap between a certain saturation band and the region of interest, it may be determined that the currently obtained saturation band is not satisfactory, and the process may proceed to step S26. In this step, the specific determination process is similar to that in the above embodiment, and is not described herein again.
Step S26: the parameters of the saturation band are adjusted such that the saturation band does not overlap the region of interest.
Specifically, if the saturation band is detected to overlap with the region of interest, the size, position, and direction of the saturation band may be adjusted so that the saturation band no longer overlaps with the region of interest. The specific process of adjusting the parameters is similar to that in the above embodiments, and is not described herein again.
Step S27: and judging whether the adjusted saturation band completely covers the fat area.
In particular, after adjusting the saturation band such that it does not overlap with the region of interest, the saturation band may be detected again. If it is detected that the saturation band can completely cover the fat region, it can be determined that the currently obtained saturation band can completely cover the fat region and does not overlap with the region of interest, and then the process can proceed to step S28. Otherwise, it may be determined that the obtained saturation band cannot completely cover the fat region, at which point it returns to step S24. The specific determination process is similar to that in the above embodiment, and is not described herein again.
Step S28: parameters of the saturation band are obtained.
In particular, after a saturation band is obtained that can both completely cover the fat region and does not overlap the region of interest, it can be determined that the saturation band can meet the needs of a magnetic resonance spectroscopy scan. At this point, parameters such as the position, orientation, and width of the saturation band may be recorded and used for scan parameter settings of the magnetic resonance spectroscopy scan sequence. In the magnetic resonance spectroscopy scanning of the portion to be scanned, the magnetic resonance scanning sequence may be used, in which the fat tissue corresponding to the saturation band region is suppressed by the saturation pulse, so that the fat tissue signal in the region covered by the saturation band is not imaged on the obtained magnetic resonance spectrum.
The embodiment provides a magnetic resonance spectrum scanning imaging method, which comprises the following steps: acquiring parameters of a saturation band by using the method for acquiring the parameters of the saturation band in the embodiment; and determining a saturation pulse sequence using the parameters of the saturation band; a magnetic resonance spectroscopy scan is performed to acquire magnetic resonance spectroscopy scan images by applying a saturation pulse sequence and an imaging sequence, respectively, to the region of interest.
The present embodiment provides a magnetic resonance system, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the following steps when executing the computer program: acquiring a magnetic resonance image of a part to be scanned, wherein the magnetic resonance image comprises a fat area; acquiring an interested area of the part to be scanned; generating a saturation band based on the region of interest, the saturation band covering at least a portion of the fat region; acquiring parameters of the saturation band; the parameters of the saturation band may include an application position of a saturation pulse and an application direction of the saturation pulse, and a saturation pulse sequence may be determined according to the parameters of the saturation band, and the saturation pulse sequence may be used to enable a magnetic resonance system to perform a magnetic resonance scan on the portion to be scanned.
The present embodiment provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of: acquiring a magnetic resonance image of a part to be scanned, wherein the magnetic resonance image comprises a fat area; acquiring an interested area of the part to be scanned; generating a saturation band based on the region of interest, the saturation band covering at least a portion of the fat region; acquiring parameters of the saturation band; wherein the parameters of the saturation band are used for enabling a magnetic resonance system to carry out magnetic resonance scanning on the part to be scanned.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a non-volatile computer-readable storage medium, and can include the processes of the embodiments of the methods described above when the program is executed. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), or the like.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (8)
1. A method of obtaining parameters of a saturation band, the method comprising:
acquiring a magnetic resonance image of a part to be scanned, wherein the magnetic resonance image comprises a fat area;
acquiring an interested area of the part to be scanned;
generating a saturation band based on the region of interest, the saturation band covering at least a portion of the fat region;
acquiring parameters of the saturation band; wherein the parameters of the saturation band are used for enabling a magnetic resonance system to carry out magnetic resonance scanning on the part to be scanned;
the saturation band comprises a first saturation band and a second saturation band, and the second saturation band is used for covering an area exposed by the first saturation band;
acquiring the outline of the region of interest;
generating a polygonal contour line based on the contour of the region of interest; and
generating the first saturation zone at the outer side of the region of interest along the direction parallel to each side of the contour line respectively;
determining whether the first saturation zone completely covers the fat region;
generating the second saturation band if the first saturation band does not completely cover the fat region.
2. The method of claim 1, wherein the acquiring a magnetic resonance image of the region to be scanned comprises:
acquiring a fat image of a part to be scanned based on a pre-scanning imaging sequence, wherein the pre-scanning imaging sequence comprises any one of the following: a DIXON water-fat separation sequence, a water signal suppression pulse sequence, or a fat frequency selective excitation pulse sequence.
3. The method of claim 1, further comprising:
judging whether the saturation zone and the region of interest have an overlapping area;
and if the saturation band and the region of interest have an overlapping region, adjusting the saturation band so that the saturation band does not overlap the region of interest.
4. The method of claim 3, wherein the saturation zone has a plurality of strips, the method further comprising:
judging whether each adjusted saturation band has an overlapping region with the fat region;
wherein the adjusted saturation band having no overlapping region with the fat region is deleted.
5. The method of any one of claims 1-4, wherein generating a second saturation band if the first saturation band fails to completely cover the fat region comprises:
and if the first saturated zone can not completely cover the fat area, generating second saturated zones along the directions which form 45-degree angles with the edges of the contour line respectively.
6. A magnetic resonance spectroscopy imaging method, comprising:
acquiring parameters of a saturation band using the method of any one of claims 1 to 5; and
a magnetic resonance spectroscopy scan is performed using the parameters of the saturation band to acquire a magnetic resonance spectroscopy scan image.
7. A magnetic resonance system comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the steps of the method of any one of claims 1 to 5 are implemented when the computer program is executed by the processor.
8. A computer-readable storage medium, on which a computer program is stored which, when being executed by a processor, carries out the steps of the method according to any one of claims 1 to 5.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0938063A (en) * | 1995-07-28 | 1997-02-10 | Shimadzu Corp | Magnetic resonance tomographic apparatus |
| JP2002017704A (en) * | 2000-06-30 | 2002-01-22 | Toshiba Corp | Magnetic resonance diagnostic device |
| JP2004344543A (en) * | 2003-05-26 | 2004-12-09 | Ge Medical Systems Global Technology Co Llc | Magnetic resonance signal collecting method, magnetic resonance imaging method and magnetic resonance imaging device |
| CN101744616A (en) * | 2008-12-19 | 2010-06-23 | Ge医疗***环球技术有限公司 | Transmitting frequency calibration method for chemical saturation in MRI and MRI system |
| JP2013034661A (en) * | 2011-08-08 | 2013-02-21 | Hitachi Medical Corp | Magnetic resonance imaging apparatus and magnetic resonance spectroscopy imaging method |
| CN103608693A (en) * | 2011-04-21 | 2014-02-26 | 皇家飞利浦有限公司 | Contrast enhanced magnetic resonance angiography with chemical shift encoding for fat suppression |
| CN107656224A (en) * | 2017-09-30 | 2018-02-02 | 上海联影医疗科技有限公司 | A kind of MR imaging method, apparatus and system |
| CN107773233A (en) * | 2016-08-31 | 2018-03-09 | 上海联影医疗科技有限公司 | A kind of MR imaging method and device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7330028B2 (en) * | 2005-09-26 | 2008-02-12 | General Electric Company | Apparatus and method of simultaneous fat suppression, magnetization transfer contrast, and spatial saturation for 3D time-of-flight imaging |
| US9700230B2 (en) * | 2012-08-29 | 2017-07-11 | Toshiba Medical Systems Corporation | Enhanced fat saturation in myocardial infarction MRI |
-
2018
- 2018-08-24 CN CN201810973257.3A patent/CN109330594B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0938063A (en) * | 1995-07-28 | 1997-02-10 | Shimadzu Corp | Magnetic resonance tomographic apparatus |
| JP2002017704A (en) * | 2000-06-30 | 2002-01-22 | Toshiba Corp | Magnetic resonance diagnostic device |
| JP2004344543A (en) * | 2003-05-26 | 2004-12-09 | Ge Medical Systems Global Technology Co Llc | Magnetic resonance signal collecting method, magnetic resonance imaging method and magnetic resonance imaging device |
| CN101744616A (en) * | 2008-12-19 | 2010-06-23 | Ge医疗***环球技术有限公司 | Transmitting frequency calibration method for chemical saturation in MRI and MRI system |
| CN103608693A (en) * | 2011-04-21 | 2014-02-26 | 皇家飞利浦有限公司 | Contrast enhanced magnetic resonance angiography with chemical shift encoding for fat suppression |
| JP2013034661A (en) * | 2011-08-08 | 2013-02-21 | Hitachi Medical Corp | Magnetic resonance imaging apparatus and magnetic resonance spectroscopy imaging method |
| CN107773233A (en) * | 2016-08-31 | 2018-03-09 | 上海联影医疗科技有限公司 | A kind of MR imaging method and device |
| CN107656224A (en) * | 2017-09-30 | 2018-02-02 | 上海联影医疗科技有限公司 | A kind of MR imaging method, apparatus and system |
Non-Patent Citations (2)
| Title |
|---|
| Availability of frequency-selective fat-saturation pulse (Fat-Sat) MRI in childhood optic neuritis;Takanashi J等;《Pediatric Neurology》;19961231;第14卷(第1期);第64-65页 * |
| Effectiveness of a Tailored Anterior Saturation Band in the Improvement of the Image Quality of Pelvic Magnetic Resonance for Assessing Rectal Cancer;Lee, CC 等;《Clinical Colorectal Cancer》;20171231;第16卷(第3期);第187-194页 * |
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