阅读说明：本技术 一种磁共振扫描方法及相关装置 (Magnetic resonance scanning method and related device ) 是由 杜君 李坤 周军 杨严伟 杨惠林 黄立新 黄军 王庆恭 于 2020-11-19 设计创作，主要内容包括：本申请公开了一种磁共振扫描方法,包括：根据膝关节标准轴位进行质子密度加权像扫描处理,得到膝关节轴位PDWI图像；根据所述膝关节轴位PDWI图像执行膝关节标准矢状位扫描和冠状位扫描,得到矢状位PDWI图像和冠状位PDWI图像；根据所述轴位PDWI图像和所述冠状位PDWI图像进行薄层斜矢状位PDWI扫描,得到扫描结果。将膝关节轴位和冠状位PDWI图像作为扫描定位图,获得薄层斜矢状位PDWI图像,实现在一个层面或连续层面上清楚地显示ACL双束结构,提高ACL扫描图像的真实性和准确性。本申请还公开了一种磁共振扫描装置、计算设备以及计算机可读存储介质,具有以上有益效果。(The application discloses a magnetic resonance scanning method, which comprises the following steps: carrying out proton density weighted image scanning processing according to the knee joint standard axial position to obtain a knee joint axial position PDWI image; performing knee joint standard sagittal scanning and coronal scanning according to the knee joint axial position PDWI image to obtain a sagittal position PDWI image and a coronal position PDWI image; and scanning the thin-layer oblique sagittal PDWI according to the axial PDWI image and the coronal PDWI image to obtain a scanning result. The PDWI images of the axial position and the coronal position of the knee joint are used as scanning positioning images to obtain the PDWI images of the oblique sagittal position of the lamina, so that the ACL double-beam structure can be clearly displayed on one layer or continuous layers, and the authenticity and the accuracy of the ACL scanning images are improved. The application also discloses a magnetic resonance scanning device, a computing device and a computer readable storage medium, which have the beneficial effects.)

1. A magnetic resonance scanning method, comprising:

carrying out proton density weighted image scanning processing according to the knee joint standard axial position to obtain a knee joint axial position PDWI image;

performing knee joint standard sagittal scanning and coronal scanning according to the knee joint axial position PDWI image to obtain a sagittal position PDWI image and a coronal position PDWI image;

and scanning the thin-layer oblique sagittal PDWI according to the axial PDWI image and the coronal PDWI image to obtain a scanning result.

2. The magnetic resonance scanning method as set forth in claim 1, wherein the step of performing proton density weighted image scanning according to the knee joint standard axis to obtain the knee joint axis PDWI image comprises:

taking the standard knee joint axis position as positioning data;

performing proton density weighted image scanning processing according to the positioning data and the scanning parameters to obtain a knee joint axis position PDWI image; wherein the scanning parameters include a layer thickness of 5.5mm and a layer spacing of 1.7 mm.

3. The magnetic resonance scanning method as set forth in claim 1, wherein performing a knee joint standard sagittal scan and a coronal scan from the knee joint axial PDWI image to obtain a sagittal PDWI image and a coronal PDWI image comprises:

taking the knee joint axial position PDWI image as a scanning positioning map;

setting the layer thickness of the scanning parameters to be 5mm, and setting the layer spacing of the scanning parameters to be 0.5 mm;

and performing knee joint standard sagittal position scanning and coronal position scanning according to the scanning positioning diagram and the scanning parameters to obtain a sagittal position PDWI image and a coronal position PDWI image.

4. The magnetic resonance scanning method as set forth in claim 1, wherein performing a lamellar oblique sagittal PDWI scan from the axial PDWI image and the coronal PDWI image to obtain a scan result comprises:

setting the layer thickness of the scanning parameters to be 2.3mm and the layer spacing of the scanning parameters to be 0 mm;

and scanning the thin-layer oblique sagittal PDWI according to the scanning parameters, the axial PDWI image and the coronal PDWI image to obtain a scanning result.

5. A magnetic resonance scanning apparatus, comprising:

the standard axial position scanning module is used for carrying out proton density weighted image scanning processing according to the knee joint standard axial position to obtain a knee joint axial position PDWI image;

the sagittal and coronal scanning module is used for executing knee joint standard sagittal scanning and coronal scanning according to the knee joint axial PDWI image to obtain a sagittal PDWI image and a coronal PDWI image;

and the scanning result acquisition module is used for scanning the thin-layer oblique sagittal PDWI according to the axial PDWI image and the coronal PDWI image to obtain a scanning result.

6. The magnetic resonance scanner of claim 5, wherein the standard axial scan module comprises:

the positioning data acquisition unit is used for taking the standard axis position of the knee joint as positioning data;

the first scanning unit is used for carrying out proton density weighted image scanning processing according to the positioning data and scanning parameters to obtain a knee joint axial position PDWI image; wherein the scanning parameters include a layer thickness of 5.5mm and a layer spacing of 1.7 mm.

7. The magnetic resonance scanner of claim 5, wherein the sagittal and coronal scan modules comprise:

the positioning map acquisition unit is used for taking the knee joint axial position PDWI image as a scanning positioning map;

the first scanning parameter setting unit is used for setting the layer thickness of the scanning parameters to be 5mm and setting the layer spacing of the scanning parameters to be 0.5 mm;

and the second scanning unit is used for executing knee joint standard sagittal position scanning and coronal position scanning according to the scanning positioning diagram and the scanning parameters to obtain a sagittal position PDWI image and a coronal position PDWI image.

8. The apparatus according to claim 5, wherein the scan result obtaining module comprises:

the second scanning parameter setting unit is used for setting the layer thickness of the scanning parameters to be 2.3mm and the layer spacing of the scanning parameters to be 0 mm;

and the third scanning unit is used for scanning the thin-layer oblique sagittal PDWI according to the scanning parameters, the axial PDWI image and the coronal PDWI image to obtain a scanning result.

9. A computing device, comprising:

a memory for storing a computer program;

a processor for implementing the steps of the magnetic resonance scanning method as claimed in any one of claims 1 to 4 when executing the computer program.

10. A computer-readable storage medium, characterized in that a computer program is stored on the computer-readable storage medium, which computer program, when being executed by a processor, carries out the steps of the magnetic resonance scanning method as set forth in any one of the claims 1 to 4.

Technical Field

The present application relates to the field of magnetic resonance scanning technologies, and in particular, to a magnetic resonance scanning method, a magnetic resonance scanning apparatus, a computing device, and a computer-readable storage medium.

Background

With the continuous development of medical technology, various scanning technologies have emerged. Magnetic Resonance Imaging (MRI) is an Imaging technique for reconstructing an image by using signals generated by the Resonance of atomic nuclei in a strong Magnetic field, and is a nuclear physical phenomenon. The method is characterized in that radio frequency pulses are used for exciting atomic nuclei with non-zero spin in a magnetic field, the atomic nuclei are relaxed after the radio frequency pulses are stopped, induction coils are used for collecting signals in the relaxation process, and a mathematical image is reconstructed according to a certain mathematical method. MRI imaging techniques differ from other imaging techniques in that they provide a much greater amount of information than many other imaging techniques in medical imaging. Thus, scanning of a region is of great significant advantage. The Tomography images of the cross section, the sagittal plane, the coronal plane and various inclined planes can be directly made, and the artifact in CT (Computed Tomography) detection can not be generated; no ionizing radiation and no harmful effect on body.

In the prior art, magnetic resonance scan of ACL (anterior cruciate ligament) is generally performed by positioning of standard joint axes. However, the anatomical features of the ACL moving obliquely forward and downward, and the inclination angle of each ACL is different, so the standard sagittal scan and coronal scan of the MRI examination of knee joint cannot reflect the actual movement of the ACL and the actual displacement direction and degree after injury, which affects the judgment of whether the ACL is injured or not or the injury degree, and potentially increases the possibility of missed diagnosis of ACL injury or misestimation of the injury degree.

Therefore, how to perform a magnetic resonance scan for an ACL to improve the accuracy of diagnosis is a major concern to those skilled in the art.

Disclosure of Invention

The purpose of the application is to provide a magnetic resonance scanning method, a magnetic resonance scanning device, a computing device and a computer readable storage medium, which take the PDWI images of the axial position and the coronal position of the knee joint as a scanning positioning diagram to obtain the PDWI images of the oblique sagittal position of a lamina, realize the clear display of an ACL double-beam structure on one layer or continuous layers and improve the authenticity and the accuracy of the ACL scanning images.

In order to solve the above technical problem, the present application provides a magnetic resonance scanning method, including:

carrying out proton density weighted image scanning processing according to the knee joint standard axial position to obtain a knee joint axial position PDWI image;

performing knee joint standard sagittal scanning and coronal scanning according to the knee joint axial position PDWI image to obtain a sagittal position PDWI image and a coronal position PDWI image;

and scanning the thin-layer oblique sagittal PDWI according to the axial PDWI image and the coronal PDWI image to obtain a scanning result.

Optionally, the scanning of the proton density weighted image is performed according to the knee joint standard axial position to obtain a knee joint axial position PDWI image, including:

taking the standard knee joint axis position as positioning data;

performing proton density weighted image scanning processing according to the positioning data and the scanning parameters to obtain a knee joint axis position PDWI image; wherein the scanning parameters include a layer thickness of 5.5mm and a layer spacing of 1.7 mm.

Optionally, the knee joint standard sagittal scan and coronal scan are executed according to the knee joint axial position PDWI image, so as to obtain a sagittal position PDWI image and a coronal position PDWI image, including:

taking the knee joint axial position PDWI image as a scanning positioning map;

setting the layer thickness of the scanning parameters to be 5mm, and setting the layer spacing of the scanning parameters to be 0.5 mm;

and performing knee joint standard sagittal position scanning and coronal position scanning according to the scanning positioning diagram and the scanning parameters to obtain a sagittal position PDWI image and a coronal position PDWI image.

Optionally, performing lamellar oblique sagittal PDWI scanning according to the axial PDWI image and the coronal PDWI image to obtain a scanning result, including:

setting the layer thickness of the scanning parameters to be 2.3mm and the layer spacing of the scanning parameters to be 0 mm;

and scanning the thin-layer oblique sagittal PDWI according to the scanning parameters, the axial PDWI image and the coronal PDWI image to obtain a scanning result.

The present application further provides a magnetic resonance scanning apparatus comprising:

the standard axial position scanning module is used for carrying out proton density weighted image scanning processing according to the knee joint standard axial position to obtain a knee joint axial position PDWI image;

the coronal scanning module is used for executing knee joint standard sagittal scanning and coronal scanning according to the knee joint axial position PDWI image to obtain a sagittal PDWI image and a coronal PDWI image;

and the scanning result acquisition module is used for scanning the thin-layer oblique sagittal PDWI according to the axial PDWI image and the coronal PDWI image to obtain a scanning result.

Optionally, the standard axial scanning module includes:

the positioning data acquisition unit is used for taking the standard axis position of the knee joint as positioning data;

the first scanning unit is used for carrying out proton density weighted image scanning processing according to the positioning data and scanning parameters to obtain a knee joint axial position PDWI image; wherein the scanning parameters include a layer thickness of 5.5mm and a layer spacing of 1.7 mm.

Optionally, the coronal scan module includes:

the positioning map acquisition unit is used for taking the knee joint axial position PDWI image as a scanning positioning map;

the first scanning parameter setting unit is used for setting the layer thickness of the scanning parameters to be 5mm and setting the layer spacing of the scanning parameters to be 0.5 mm;

and the second scanning unit is used for executing knee joint standard sagittal position scanning and coronal position scanning according to the scanning positioning diagram and the scanning parameters to obtain a sagittal position PDWI image and a coronal position PDWI image.

Optionally, the scan result obtaining module includes:

the second scanning parameter setting unit is used for setting the layer thickness of the scanning parameters to be 2.3mm and the layer spacing of the scanning parameters to be 0 mm;

and the third scanning unit is used for scanning the thin-layer oblique sagittal PDWI according to the scanning parameters, the axial PDWI image and the coronal PDWI image to obtain a scanning result.

The present application further provides a computing device comprising:

a memory for storing a computer program;

a processor for carrying out the steps of the magnetic resonance scanning method as described above when executing the computer program.

The present application further provides a computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps of the magnetic resonance scanning method as set forth above.

The application provides a magnetic resonance scanning method, which comprises the following steps: carrying out proton density weighted image scanning processing according to the knee joint standard axial position to obtain a knee joint axial position PDWI image; performing knee joint standard sagittal scanning and coronal scanning according to the knee joint axial position PDWI image to obtain a sagittal position PDWI image and a coronal position PDWI image; and scanning the thin-layer oblique sagittal PDWI according to the axial PDWI image and the coronal PDWI image to obtain a scanning result.

The thin-layer oblique sagittal PDWI image is obtained by taking the knee joint axial position and coronal position FS-PDWI images as scanning positioning images, so that an ACL double-bundle structure is clearly displayed on one layer or continuous layers, partial volume effect is eliminated by reducing the layer thickness and the interlayer spacing, the problem that the ACL cannot be accurately positioned is avoided, complete and real walking images of the anterior-medial-lateral bundle and the posterior-lateral bundle of the ACL can be obtained to the maximum extent, meanwhile, the influence of anatomical difference of ACL walking among individuals on an inspection result can be eliminated, the diagnosis of ACL damage is facilitated, and the authenticity and the accuracy of the ACL scanning image are improved.

The present application further provides a magnetic resonance scanning apparatus, a computing device, and a computer-readable storage medium, which have the above beneficial effects and are not described herein again.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a flowchart of a magnetic resonance scanning method according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a scanning positioning method according to an embodiment of the present disclosure;

FIG. 3 is a schematic view of another scanning positioning chart provided in the embodiment of the present application;

fig. 4 is a schematic structural diagram of a magnetic resonance scanning apparatus according to an embodiment of the present application.

Detailed Description

The core of the application is to provide a magnetic resonance scanning method, a magnetic resonance scanning device, a computing device and a computer readable storage medium, wherein a thin-layer oblique sagittal PDWI image is obtained by taking knee joint axial position and coronal position PDWI images as scanning positioning images, so that an ACL double-beam structure is clearly displayed on one layer or continuous layers, and the authenticity and the accuracy of the ACL scanning images are improved.

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the prior art, magnetic resonance scans of the ACL are typically performed by positioning of standard joint axes. However, the anatomical features of the ACL moving obliquely forward and downward, and the inclination angle of each ACL is different, so the standard sagittal scan and coronal scan of the MRI examination of knee joint cannot reflect the actual movement of the ACL and the actual displacement direction and degree after injury, which affects the judgment of whether the ACL is injured or not or the injury degree, and potentially increases the possibility of missed diagnosis of ACL injury or misestimation of the injury degree.

Therefore, the magnetic resonance scanning method is provided, the thin-layer oblique sagittal PDWI image is obtained by taking the knee joint axial position image and the coronal FS-PDWI image as scanning positioning images, the ACL double-bundle structure is clearly displayed on one layer or continuous layers, partial volume effect is eliminated by reducing the layer thickness and the interlayer spacing, the problem that the ACL cannot be accurately positioned is avoided, the complete and real walking images of the anterior-medial bundle and the posterior-lateral bundle of the ACL can be obtained to the maximum extent, meanwhile, the influence of the anatomical difference of ACL walking among individuals on the inspection result can be eliminated, the diagnosis of ACL damage is facilitated, and the authenticity and the accuracy of the ACL scanning image are improved.

The following describes a magnetic resonance scanning method provided by the present application by an embodiment.

Referring to fig. 1, fig. 1 is a flowchart of a magnetic resonance scanning method according to an embodiment of the present application.

In this embodiment, the method may include:

s101, carrying out proton density weighted image scanning processing according to the knee joint standard axial position to obtain a knee joint axial position PDWI image;

the method aims to perform proton density weighted image scanning processing according to the knee joint standard axial position to obtain a knee joint axial position PDWI image. Namely, the magnetic resonance scanning processing of the knee joint standard axial position is firstly carried out, and the knee joint axial position PDWI image is obtained.

The knee joint standard axis position refers to a standard axis position for scanning the knee joint. Generally, the standard axes of the knee joint are not personalized, and the same standard axes are adopted for different people.

The proton density weighted imaging refers to an imaging technology that reflects the distribution of proton density in a magnetic field in magnetic resonance imaging. The human body contains a large amount of water, and when human tissue is imaged, a sequence of long TR (2000ms) and short TE (30-40 ms) is usually selected for proton density weighted imaging. Since long TR and short TE reduce the effect of T1 and T2 on the imaging signal, highlighting the tissue proton density related signal on the image. The tissue proton density is not very different, so the contrast is not strong (10% -15%). But has a higher signal-to-noise ratio for observing fine structure tissues. Further, all the PDWIs in this embodiment are FS-PDWIs.

Optionally, this step may include:

step 1, taking the standard axial position of the knee joint as positioning data;

step 2, carrying out proton density weighted image scanning processing according to the positioning data and the scanning parameters to obtain a knee joint axis position PDWI image; wherein the scanning parameters include a layer thickness of 5.5mm and a layer spacing of 1.7 mm.

It can be seen that the present alternative is primarily illustrative of how the proton density weighted image scanning process may be performed. Specifically, in the alternative, the standard axial position of the knee joint is used as positioning data; then, carrying out proton density weighted image scanning processing according to the positioning data and the scanning parameters to obtain a knee joint axis position PDWI image; wherein the scanning parameters include a layer thickness of 5.5mm and a layer spacing of 1.7 mm. That is to say that in this alternative a corresponding sequence of scans is performed with a layer thickness of 5.5mm and a layer spacing of 1.7 mm.

S102, performing knee joint standard sagittal scanning and coronal scanning according to the knee joint axial position PDWI image to obtain a sagittal position PDWI image and a coronal position PDWI image;

on the basis of S101, the present step is intended to perform knee joint standard sagittal scan and coronal scan from the knee joint axial position PDWI image, resulting in a sagittal PDWI image and a coronal PDWI image.

Among them, the coronal plane is also called frontal plane. That is, the human body is longitudinally cut into sections of the front part and the rear part along the long axis of the human body from the front and rear directions. Primarily to describe organ positions in more detail in the clinic. Wherein, the sagittal plane is the dissection plane which divides the human body into a left side and a right side, and the sagittal plane is parallel to the left side and the right side. The director belonging to this position.

Optionally, this step may include:

step 1, taking a knee joint axial position PDWI image as a scanning positioning image;

step 2, setting the layer thickness of the scanning parameters to be 5mm, and setting the layer spacing of the scanning parameters to be 0.5 mm;

and 3, performing knee joint standard sagittal scanning and coronal scanning according to the scanning positioning picture and the scanning parameters to obtain a sagittal PDWI image and a coronal PDWI image.

It can be seen that the present alternative is primarily to scan how the knee joint standard sagittal and coronal scans are performed. Specifically, in the alternative, firstly, a knee joint axial position PDWI image is used as a scanning positioning map; then, the layer thickness of the scanning parameters is set to be 5mm, and the layer spacing of the scanning parameters is set to be 0.5 mm; and finally, performing knee joint standard sagittal position scanning and coronal position scanning according to the scanning positioning picture and the scanning parameters to obtain a sagittal position PDWI image and a coronal position PDWI image.

S103, scanning the thin-layer oblique sagittal PDWI according to the axial PDWI image and the coronal PDWI image to obtain a scanning result.

On the basis of S102, the thin-layer oblique sagittal PDWI scanning is carried out according to the axial PDWI image and the coronal PDWI image, and a scanning result is obtained.

The thin-layer oblique sagittal PDWI scanning is that magnetic resonance scanning is carried out in the axial position and the coronal position parallel to the walking direction of an ACL double-beam structure by adopting smaller layer thickness and layer spacing.

Optionally, this step may include:

step 1, setting the layer thickness of the scanning parameters to be 2.3mm, and setting the layer spacing of the scanning parameters to be 0 mm;

and 2, scanning the thin-layer oblique sagittal PDWI according to the scanning parameters, the axial PDWI image and the coronal PDWI image to obtain a scanning result.

It can be seen that this alternative is primarily illustrative of how a lamellar oblique sagittal PDWI scan can be performed. Specifically, in the alternative, the layer thickness of the scanning parameter is set to 2.3mm, and the layer spacing of the scanning parameter is set to 0 mm; and then, scanning the thin-layer oblique sagittal PDWI according to the scanning parameters, the axial PDWI image and the coronal PDWI image to obtain a scanning result.

In each of the above alternatives, the more specific scanning modes described in detail are all scanning sequences in the prior art. The scanning sequence refers to the setting of relevant parameters such as radio frequency pulse, gradient field, signal acquisition time and the like and the arrangement of the relevant parameters on a time sequence. MR imaging relies mainly on four factors: i.e. proton density, T1, T2, flow space effect, images reflecting different emphasis of these factors can be obtained using different magnetic resonance scan sequences.

In summary, in the present embodiment, the thin-layer oblique sagittal PDWI image is obtained by using the knee joint axial position and coronal position FS-PDWI images as the scanning positioning map, so as to clearly display the ACL double-bundle structure on one layer or continuous layers, and eliminate partial volume effect by reducing the layer thickness and the layer spacing, thereby avoiding the problem that the ACL cannot be accurately positioned, and further obtaining the complete and real walking images of the anterior-medial bundle and the posterior-lateral bundle of the ACL to the maximum extent, and simultaneously, eliminating the influence of anatomical difference of ACL walking between individuals on the inspection result, facilitating the diagnosis of ACL injury, and improving the authenticity and accuracy of the ACL scanning image.

A magnetic resonance scanning method provided in the present application is further described below with reference to a specific embodiment.

The embodiment is mainly applied to a specific application environment, and the method may include:

preparation before examination: the examinee performs routine MRI examination preparation before examination, and removes any non-fixed metal articles carried by the examinee; removing the toilet; putting on the earplug in advance; ferromagnetic metal implants, unconscious critically ill persons or pregnant women in the first three months of pregnancy are prohibited from performing the examination.

Body position of the subject: performing MRI scanning examination by using a special coil for the knee joint; during scanning, the examinee takes the supine position with advanced feet and legs stretched, the sponge cushion is placed below the knee joint, the sandbags fix the two sides of the knee joint, and the lower edge of the patella is placed in the center of the coil.

Scanning sequence and method: firstly, a knee joint standard axial proton density weighted image is obtained to obtain a knee joint axial PDWI image, and then the knee joint axial PDWI image is taken as a scanning positioning image to carry out conventional knee joint standard sagittal position and coronal position scanning. And then, in the obtained knee joint axial position and coronal position PDWI images, optimally displaying an image of an anterior medial bundle and a posterior lateral bundle of the ACL as a scanning positioning picture, scanning the PDWI at the oblique sagittal position of the line lamella in the axial position and the coronal position which are parallel to the walking direction of the ACL double-bundle structure, wherein each scanning sequence parameter is shown in table 1.

TABLE 1 table of scan parameters for each sequence

Referring to fig. 2, fig. 2 is a schematic diagram of a scanning positioning method according to an embodiment of the present disclosure.

FIG. 2 is a cross-sectional view of a left knee (A and B) and right knee (C and D) in a thin oblique sagittal PDWI scan scout view; lamellar oblique sagittal PDWI scout scans were performed on axial (fig. A, C) and coronal (fig. B, D) PDWI images to show the best planes of the ACL dual beam structure parallel to the ACL dual beam structure.

For example, please refer to fig. 3, fig. 3 is a schematic diagram of another scanning positioning diagram according to an embodiment of the present application.

Fig. 3 illustrates a left knee joint conventional MRI sequence: sagittal, coronal T1WI shows ACL thinning (A, B); the PDWI at the sagittal position and the coronal position shows that the ACL form is less regular, the walk shape is tortuous, the middle section is thinned, and the signal is increased (C, D); the cross bit PDWI indicates an increase in the ACL signal (E). Supplementing and sweeping the FS-PDWI sequence (F) in the sagittal oblique position, and showing that the anterior-medial fascicles of the ACL are complete in structure, the posterior-lateral fascicles are torn, the broken ends are free and reversely folded, and the periphery of the ACL surrounds the joint fluid. Arthroscopy revealed a tear in the middle posterolateral tract of the ACL with free ends (G).

For men, age 35, a conventional MRI sequence and a lamellar oblique sagittal PDWI sequence scan (fig. 3) were performed on the left knee.

Conventional MRI sequence sagittal, coronal T1WI shows ACL thinning; the PDWI at the sagittal position and the coronal position shows that the ACL form is less regular, the walk form is tortuous, the middle section is thinned, and the signal is increased; the cross bit PDWI indicates an increase in the ACL signal.

After the sagittal FS-PDWI sequence was supplemented, it was found that the anterior-medial bundle of ACL was structurally intact, the posterior-lateral bundle was torn, the distal end was free and invaginated, and the joint fluid was surrounded.

The left knee joint is probed by arthroscope, and the middle section of the posterior lateral bundle of the ACL is torn, and the broken end is free.

Therefore, in the embodiment, the thin-layer oblique sagittal PDWI image is obtained by taking the axial knee joint position and coronal FS-PDWI image as a scanning positioning image, so that the ACL double-beam structure is clearly displayed on one layer; partial volume effect is eliminated by reducing the layer thickness and the layer spacing, and the problem that ACL cannot be accurately positioned is avoided; the sequence acquires complete and real walking images of an anterior-medial bundle and a posterior-lateral bundle of the ACL to the maximum extent, simultaneously eliminates the influence of the anatomical difference of ACL walking between individuals on the inspection result, is beneficial to diagnosing ACL damage, and improves the authenticity and accuracy of an ACL scanning image.

In the following, a magnetic resonance scanning apparatus provided by an embodiment of the present application is described, and the magnetic resonance scanning apparatus described below and the magnetic resonance scanning method described above may be referred to correspondingly.

Referring to fig. 4, fig. 4 is a schematic structural diagram of a magnetic resonance scanning apparatus according to an embodiment of the present application.

In this embodiment, the apparatus may include:

the standard axial position scanning module 100 is configured to perform proton density weighted image scanning processing according to a knee joint standard axial position to obtain a knee joint axial position PDWI image;

the sagittal and coronal scanning module 200 is configured to perform knee joint standard sagittal scanning and coronal scanning according to the knee joint axial PDWI image to obtain a sagittal PDWI image and a coronal PDWI image;

and the scanning result acquisition module 300 is configured to perform lamellar oblique sagittal PDWI scanning according to the axial PDWI image and the coronal PDWI image to obtain a scanning result.

Optionally, the standard axial scan module 100 may include:

the positioning data acquisition unit is used for taking the standard axis position of the knee joint as positioning data;

the first scanning unit is used for carrying out proton density weighted image scanning processing according to the positioning data and the scanning parameters to obtain a knee joint axial position PDWI image; wherein the scanning parameters include a layer thickness of 5.5mm and a layer spacing of 1.7 mm.

Optionally, the sagittal and coronal scan module 200 may include:

the positioning map acquisition unit is used for taking the knee joint axial position PDWI image as a scanning positioning map;

the first scanning parameter setting unit is used for setting the layer thickness of the scanning parameters to be 5mm and setting the layer spacing of the scanning parameters to be 0.5 mm;

and the second scanning unit is used for executing the knee joint standard sagittal scanning and coronal scanning according to the scanning positioning map and the scanning parameters to obtain a sagittal PDWI image and a coronal PDWI image.

Optionally, the scan result obtaining module 300 may include:

the second scanning parameter setting unit is used for setting the layer thickness of the scanning parameters to be 2.3mm and the layer spacing of the scanning parameters to be 0 mm;

and the third scanning unit is used for scanning the thin-layer oblique sagittal PDWI according to the scanning parameters, the axial PDWI image and the coronal PDWI image to obtain a scanning result.

An embodiment of the present application further provides a computing device, including:

a memory for storing a computer program;

a processor for implementing the steps of the magnetic resonance scanning method as described in the above embodiments when executing the computer program.

Embodiments of the present application also provide a computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the steps of the magnetic resonance scanning method according to the above embodiments.

The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

A magnetic resonance scanning method, a magnetic resonance scanning apparatus, a computing device, and a computer-readable storage medium provided by the present application are described in detail above. The principles and embodiments of the present application are explained herein using specific examples, which are provided only to help understand the method and the core idea of the present application. It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present application without departing from the principle of the present application, and such improvements and modifications also fall within the scope of the claims of the present application.