CN210376196U

CN210376196U - Nuclear magnetic resonance multi-module detection die body

Info

Publication number: CN210376196U
Application number: CN201921250126.9U
Authority: CN
Inventors: 孙朝阳
Original assignee: Gu'an Chaoyang Biological Technology Co ltd
Current assignee: Gu'an Chaoyang Biological Technology Co ltd
Priority date: 2019-08-05
Filing date: 2019-08-05
Publication date: 2020-04-21
Anticipated expiration: 2029-08-05

Abstract

The application discloses a nuclear magnetic resonance multi-module detection die body, which comprises a shell and a plurality of modules connected in the shell; at least two of the plurality of modules are selected from a layer thickness test module, a spatial linearity test module, a spatial resolution test module, and a low contrast resolution test module. The utility model provides a nuclear magnetic resonance multi-module detects die body sets up a plurality of detection module, and every detection module is used for one or more detection, and each module is connected according to the detection needs, and a detection die body integrates multinomial detectability, and it is all convenient to use and carry.

Description

Nuclear magnetic resonance multi-module detection die body

Technical Field

The application belongs to the technical field of nuclear magnetic resonance, and particularly relates to a nuclear magnetic resonance multi-module detection die body.

Background

Since 1895, X-rays have been widely used for examining the human body as a basis for disease diagnosis since the discovery of X-rays by roentgen. By the 70 s and 80 s of the 20 th century, X-ray computed tomography, which is a product of the recent leap forward of the development of computer technology combined with X-ray medical diagnostic technology, has been developed. In 1971, the first head CT scanner was successfully researched by british EMI corporation, and in 1975, the first whole-body CT scanner was designed in the united states, which scans the body layer surface with X-rays, acquires information, and obtains a reconstructed image through computer processing, thereby significantly expanding the detection range of the human body, and improving the detection rate of lesions and the accuracy of diagnosis. The new model CT produced by CT in all countries in the world is based on the continuous improvement and innovation of original model CT machines, and the improvement on the aspects of scanning speed, processing speed, reconstruction algorithm and the like is continuous, so that more convenient and faster CT diagnosis is brought to people. The CT diagnostic machine also brings a big problem to people, manufacturers also make continuous research and research on the detection and index control of the instrument, and currently, the detection of the CT instrument by using the phantom becomes the mainstream.

A general nuclear magnetic resonance test phantom is usually only used for a specific test item, so that a plurality of phantoms are usually required to be used for comprehensively evaluating a certain magnetic resonance device, and the test and carrying are inconvenient.

Disclosure of Invention

In view of the above-mentioned deficiencies or inadequacies in the prior art, it would be desirable to provide a nuclear magnetic resonance multi-module detection phantom.

The application provides a nuclear magnetic resonance multi-module detection die body, which comprises a shell and a plurality of modules connected in the shell; at least two of the plurality of modules are selected from a layer thickness test module, a spatial linearity test module, a spatial resolution test module, and a low contrast resolution test module;

the layer thickness testing module comprises a supporting plate and a frame which is shaped like a Chinese character 'hui' as a whole; the end face of the frame is connected to the support disc; four surfaces of the outer wall of the frame are provided with inclined plane plates; the 4 inclined plane plates are obliquely crossed with the axis of the frame, and the included angles are equal in degree;

the space linear test module comprises a space linear test disc; a plurality of rectangular array positions are distributed on the space linear test disc in a rectangular array manner; a spatial linear test through hole is formed in a part of rectangular array positions;

the spatial resolution testing module comprises a spatial resolution testing disc; the spatial resolution test disc is provided with a plurality of groups of line pairs and a plurality of groups of spatial resolution test through holes; each group of spatial resolution testing through holes are distributed in an annular array by taking the center of the spatial resolution testing disc as the circle center, and the distribution angle is more than 150 degrees;

the low-contrast resolution test module comprises a low-contrast resolution test disc; a plurality of annular array positions are distributed on the low-contrast resolution test disc in an annular array; taking a straight line passing through the center of the low-contrast resolution test disc as a boundary line, wherein a circular hole is arranged on the annular array position on one side of the boundary line, and a cylinder is arranged or left vacant on the annular array position on the other side of the boundary line; the depth of the round hole is smaller than the thickness of the low-contrast resolution test disc; the depth of each round hole with the same distance with the center of the annular array is different; the height of each cylinder at the same distance from the center of the circular array varies.

The utility model provides a nuclear magnetic resonance multi-module detects die body sets up a plurality of detection module, and every detection module is used for one or more detection, and each module is connected according to the detection needs, and a detection die body integrates multinomial detectability, and it is all convenient to use and carry.

Furthermore, a square hole is formed in the supporting plate; the distance between two opposite surfaces of the inner wall of the frame is larger than the size of the square hole.

Furthermore, the inclined plane board is cuboid plate-shaped, and a seamed edge is arranged along the diagonal line of the outer wall of the frame.

Furthermore, the number of the rectangular arrays without the spatial linear test through holes is two, and the extension line of the connecting line of the rectangular arrays passes through the center of the spatial linear test disk.

Furthermore, an isosceles right triangle through hole is also arranged on the spatial resolution testing disc; an acute angle vertex of the isosceles right triangle through hole is positioned at the center of the spatial resolution test disc.

Furthermore, the line pairs are arranged in two rows, and the arrangement directions of the two rows of line pairs are mutually vertical.

Furthermore, the diameters of the spatial resolution testing through hole, the circular hole and the cylinder are increased along with the increase of the distance between the center of the through hole, the circular hole and the center of the circular array.

Further, the depth value of the circular hole symmetrical about the boundary line is equal to the height value of the cylinder.

Further, the shell comprises a bottom panel, a side panel and a sealing cover; the side plate is cylindrical; the sealing cover and the bottom panel are both in a disc shape and are respectively connected to the upper end and the lower end of the side plate; two screws are symmetrically arranged on the sealing cover; the lower end face of the screw is flush with the lower end face of the sealing cover.

Furthermore, at least two connecting columns are arranged in the shell; two ends of the connecting column are respectively connected to the sealing cover and the bottom panel; through holes for the connecting columns to pass through are formed in the positions, corresponding to the connecting columns, of the modules; the circumferential surface of the connecting column is provided with sleeves for fixing the modules, wherein the sleeves are arranged between adjacent modules, between the uppermost module and the sealing cover and between the lowermost module and the bottom panel.

The application has the advantages and positive effects that: the utility model provides a nuclear magnetic resonance multi-module detects die body sets up a plurality of detection module, and every detection module is used for one or more detection, and each module is connected according to the detection needs, and a detection die body integrates multinomial detectability, and it is all convenient to use and carry.

In addition to the technical problems addressed by the present application, the technical features constituting the technical solutions, and the advantages brought by the technical features of the technical solutions described above, other technical problems solved by the present application, other technical features included in the technical solutions, and advantages brought by the technical features will be further described in detail below with reference to the accompanying drawings.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

fig. 1 is a schematic view of an external structure of a nuclear magnetic resonance multi-module detection mold body provided in embodiment 1 of the present application;

fig. 2 is a schematic view of an internal structure of a nuclear magnetic resonance multi-module detection mold body provided in embodiment 1 of the present application;

fig. 3 is a schematic structural diagram of a sealing cover in a nuclear magnetic resonance multi-module detection mold body according to embodiment 1 of the present application;

fig. 4 is a schematic structural diagram of a connecting column in a nuclear magnetic resonance multi-module detection die body provided in embodiment 1 of the present application;

fig. 5 is a schematic structural diagram of a layer thickness testing module in a nuclear magnetic resonance multi-module detecting mold body according to embodiment 1 of the present application;

fig. 6 is a schematic diagram of a groove structure in a nuclear magnetic resonance multi-module detection mold body provided in embodiment 1 of the present application;

fig. 7 is a schematic structural diagram of a spatial linearity testing module in a nuclear magnetic resonance multi-module detection die body according to embodiment 1 of the present application;

fig. 8 is a schematic structural diagram of a spatial resolution testing module in a nuclear magnetic resonance multi-module detection die body according to embodiment 1 of the present application;

fig. 9 is a schematic perspective view of a low resolution testing module in a nuclear magnetic resonance multi-module testing phantom provided in embodiment 1 of the present application;

fig. 10 is a schematic cross-sectional view of a low resolution testing module in a nuclear magnetic resonance multi-module testing mold body according to embodiment 1 of the present application;

fig. 11 is a schematic view of an internal structure of a nuclear magnetic resonance multi-module detection phantom provided in embodiment 2 of the present application;

fig. 12 is a schematic structural diagram of a layer thickness testing module in a nuclear magnetic resonance multi-module detecting mold body according to embodiment 2 of the present application;

fig. 13 is a schematic structural diagram of a spatial resolution testing module in a nuclear magnetic resonance multi-module detection die body according to embodiment 2 of the present application;

fig. 14 is a schematic perspective view of a low resolution testing module in a nuclear magnetic resonance multi-module detection phantom provided in embodiment 3 of the present application.

In the figure: 10. a housing; 11. a side plate; 12. a sealing cover; 13. a bottom panel; 14. a screw; 15. a screw; 16. connecting columns; 17. a sleeve; 20. a layer thickness test module; 21. a frame; 22. an inclined plane plate; 23. a support disc; 24. a square hole; 25. a groove; 26. a cylinder; 30. a spatial linearity test module; 31. a spatial linear test tray; 32. testing the through hole in a spatial linear mode; 40. a spatial resolution test module; 41. a spatial resolution test disk; 42. wire pair; 43. a spatial resolution test through hole; 44. an isosceles right triangle through hole; 50. a low contrast resolution test module; 51. a low contrast resolution test disk; 52. a round hole; 53. and (4) a cylinder.

Detailed Description

The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1 and fig. 2, the present embodiment provides a nuclear magnetic resonance multi-module detection mold body, which includes a housing 10 and 4 modules connected in the housing 10; the 4 modules are respectively a layer thickness test module 20, a spatial linear test module 30, a spatial resolution test module 40 and a low contrast resolution test module 50. The appearance of the mold body is shown in fig. 1, and the layout of the internal modules is shown in fig. 2. The outer diameter of a cylindrical side plate 11 of the die body is 130mm, and the inner diameter is 120 mm; the length of the mould is 125mm (including two bottoms), and the thicknesses of the sealing covers 12 and the bottom panel 13 at two ends of the cylindrical side panel 11 are 15mm and 10mm respectively.

1. Shell body

1.1 sealing caps

The sealing cap 12 is composed of a disk having a diameter of 140mm and a thickness of 12mm and a disk having a diameter of 120mm and a thickness of 3mm, which are integrated. The sealing cap 12 has a sealing ring with a diameter of 120mm clamped on its inner side, and its thickness is determined according to the situation. (the sealing ring can fix the sealing cover and the shell more firmly to prevent liquid leakage). The sealing cover 12 is shown in a three-dimensional structure in fig. 3.

A blind hole with the depth of 6mm and the diameter of 8mm is formed in the sealing cover 12 at a position 54mm away from the center of the disc, and is used for inserting the connecting column 16 into the blind hole for fixing the internal module structure.

(2) The positions which are 30mm away from the center of the disc in the horizontal direction are respectively provided with an internal thread hole (the inner side of which is provided with a thread) with the diameter of 20mm and penetrating through the sealing cover, so that the screw 14 (the outer side of which is provided with the thread) is screwed in; six small internal threaded holes (with threads machined on the inside) are formed around the disc so that screws 15 (with threads machined on the outside) can be screwed into the internal threaded holes to fix the sealing cover 12 to the side plate 11.

(3) The screw 14 has a cap with a thickness of 10mm outside the sealing cap 12 and a stud screwed into the sealing cap 12 with a length of 15mm and an end just flush with the sealing cap 12.

The bottom panel 13 is a disk with a diameter of 130mm and a thickness of 10 mm. Two blind holes with the diameter of 8mm and the thickness of 6mm are arranged on the inner side surface.

Blind holes with a depth of 6mm and a diameter of 8mm are formed in the bottom plate 13 at positions 54mm away from the center of the disc, respectively, so that the connecting columns 16 can be inserted. The fixing of the parts in the phantom is convenient.

1.3 side panel

The cylindrical side plate 11 has an inner radius of 60mm (diameter 120mm), an outer radius of 65mm (diameter 130mm) and a length of 103 mm. The lower bottom surface is welded, sealed and fixed with the bottom panel 13. The upper bottom surface and the sealing cover 12 are fixed through a sealing ring and a fixing screw 15.

1.4 Sleeve and connecting column Structure

All be equipped with a disc structure on every module in the mould, have 2 circular through-holes that the diameter is 8mm above the disc, can pass each aspect and connect each lamella through the circular blind hole of sunken (hole depth 6mm, diameter 8mm) at casing both ends with two spliced poles 16 that length is 112mm (100+6+6), diameter is 10 mm. The individual modules are then secured by sleeves 17 of different lengths (inner diameter 8mm, outer diameter 12 mm). The sleeves 17 are arranged in two sets, the length of the sleeve 17 on each layer is required to be consistent, and the position relationship between the sleeve 17 and the connecting column 16 is shown in figure 4.

Two connecting posts 16 can be inserted into round holes (the hole depth is 6mm, and the diameter is 8mm) on the inner sides of the phantom sealing cover 12 and the bottom panel 13. Each functional module is fixed by the connecting column 16, the sleeve 17 and the round holes of the sealing cover 12 and the bottom panel 13.

In other embodiments of the present application, there may be more than one connecting column, such as 3 or 4; correspondingly, 3 sets and 4 sets of sleeves are correspondingly arranged.

2. Internal functional module structure

2.1 Module one

Referring to fig. 5, the first module is a layer thickness testing module 20, and has a main structure including a frame 21 having a rectangular hollow structure (i.e., a square-shaped frame with a groove) and a bevel plate 22 installed in the groove; the "square" shape is fixed on a support plate 23 with 2 positioning holes and thickness of 5 mm.

The support disc 23 is a circular disc with a square hole 24 of 40 x 40 mm. The frame of the "return" configuration is welded to the support plate 23.

The module has a structure in a shape like a Chinese character 'hui', the length of the outer edge is 60mm, the length of the inner edge is 50mm, and the height is 15 mm. A groove 25 (see fig. 6) with a certain inclination angle a (tan a ═ 0.25) is cut out on each of the four outer sides of the module. The groove 25 of each side surface is shaped from the upper left to the lower right of the cross section thereof. The recess 25 serves as a fixing into which the test layer thick bevel plate 22 can be inserted and fixed.

The inclined plane 22 has a thickness of 2mm and a width of 20mm, and the length thereof can be set in the groove 25 near both ends (about 61 mm).

The support disk 23 is a disk with a diameter of 120mm and a thickness of 5mm, and has a square hole 24 of 40X 40mm in the center. Two circular through holes with the diameter of 8mm are processed at the positions 54mm away from the center of the disc respectively at the left and the right so as to lead the connecting column 16 to pass through and fix the layer surface.

In other embodiments of the present application, 4 semicircular holes with a radius of 5mm are provided at the intersection of the angular bisector of the four quadrants and the edge of the disc in a cross-sectional view of the support disc.

A cylinder 26 with a radius of 2.5mm and a height of 10mm is fixed at a vertex on the inner side of the 'return' shaped structure.

2.2 Module two

Referring to fig. 7, the second module is a spatial linear testing module 30, which includes a spatial linear testing disk 31, where the spatial linear testing disk 31 is a disk structure with a diameter of 120mm (the diameter is 1mm smaller during processing, and is conveniently placed in a housing), and a thickness of 3 mm. The linear test disk 31 is provided with linear test through holes 32 of 5mm × 5mm at equal intervals (5mm) to form a rectangular hole array penetrating the sheet. The center of the disk coincides with the center of the spatially linear test through hole 32.

Describing the orientation shown in fig. 7, performing spatial linear test, wherein the center of a circle 31 is an origin, the right side is the x-axis forward direction, and the upper side is the y-axis forward direction, two regions (solid regions) without digging small square holes are arranged at the position of the first quadrant, wherein the center of the first non-digging small square hole is at the vertex of the upper right corner of a square with two sides of 20 × 20mm in the x-axis forward direction and the y-axis forward direction; the center of the second non-hollowed square hole is at the vertex of the upper right corner of a 30 x 30mm square with two sides in the positive x-axis and positive y-axis directions.

Two circular through holes with the diameter of 8mm are processed at the positions which are respectively 54mm away from the center of the disc in the horizontal direction on the figure 7, so that the connecting column 16 can pass through and fix the layer surface.

2.3 Module three

Referring to fig. 8, the third module is a spatial resolution testing module 40, which includes a spatial resolution testing tray 41; the spatial resolution test disc 41 is a disc with a diameter of 120mm (the diameter is smaller than 1mm during processing, and the disc is conveniently placed in a shell) and a thickness of 2 mm.

The spatial resolution test disc 41 is provided with a plurality of groups of line pairs 42 and a plurality of groups of spatial resolution test through holes 43 with circular cross sections; each group of spatial resolution test through holes 43 are distributed in an annular array by taking the center of the spatial resolution test disc 41 as the center of a circle, and the distribution angle is 180 degrees.

The line pairs 42 are in two rows, one row of line pairs 42 being horizontally aligned and the other row being vertically aligned, as depicted in the orientation shown in fig. 8. The corresponding intervals of the line pairs 42 are respectively of a periodic structure with the lengths of 2.0 mm, 1.25 mm, 1.1mm, 1.0mm, 0.9 mm and 0.5mm, and the length of each group of line pairs 42 is 10 mm. In the line pair 42 structure of each direction, two adjacent line pairs 42 are spaced apart by 4 mm.

FIG. 8 shows the inside of the horizontal line pair structure at 34mm from the center of the disk, with the left side of the third rectangle having a width of 1.1mm just above the diameter of the vertical over-center; the vertical pair structure is obtained in the same manner as described above.

Describing the orientation shown in fig. 8, the circle center of the spatial resolution test disc 41 is the origin, the right side is the x-axis forward direction, and the upper side is the y-axis forward direction, the y-axis forward direction is located at positions 6.3727, 9.5591, 12.7455, 15.9319, 19.1182 and 25.4910mm from the center of the disc, and circular through holes with the machining radii of 0.2498, 0.3747, 0.4996, 0.6245, 0.7494 and 0.9992mm are respectively machined. The depth of these circles is 2mm (through the disk), which is the spatial resolution test through hole 43. The structure shown in fig. 8 is formed by rotating a row of spatial resolution test through holes 43 in the positive direction of the y axis 10 times in steps of 9 ° in the positive direction and the negative direction of the x axis, respectively. The space resolution testing disc 41 is also provided with an isosceles right triangle through hole 44, the vertex of a 45-degree angle of the isosceles right triangle is positioned at the center of the disc, the length of the right angle side is 40mm, and the two right angle sides are respectively parallel to the x axis and the y axis. The straight triangles penetrate the module.

In fig. 8, two circular through holes with the diameter of 8mm are arranged at the positions which are 54mm away from the center of the disc respectively in the x-axis direction, so that the connecting column passes through the through holes to fix the layer surface.

In other embodiments of the present application, module three may be provided with 3 semicircular holes with a radius of 5mm at the intersection point of the angular bisector of the upper semicircular quadrant and the negative direction of the y-axis with the edge of the disc on fig. 8.

2.4 Module four (disc thickness 2mm, diameter 120mm)

Referring to fig. 9 and 10, the module four is a low resolution test module 50, which includes a low resolution test disc 51, and the low resolution test disc 51 is a disc with a diameter of 120mm (the diameter is smaller than 1mm during processing, and is conveniently placed in a housing), and a thickness of 2 mm.

Describing the orientation shown in fig. 10, if the center of the circle of the low-resolution test disc 51 is the origin, the right side is the x-axis forward direction, and the upper side is the y-axis forward direction, then circular holes 52 with the radius of 1, 1.5, 2, 2.5, 3mm and the depth of 0.5mm are machined at the positions which are respectively 10, 17, 25, 36 and 48mm away from the center of the circle in the y-axis forward direction; and processing the cylinders 53 with the radiuses of 1, 1.5, 2, 2.5 and 3mm and the heights of 0.5mm at the positions which are respectively 10, 17, 25, 36 and 48mm away from the circle center in the negative direction of the y axis. The structure was rotated 3 times in steps of 26 ° to the positive and negative x-axis respectively, resulting in 6 additional sets of circular holes 52 and cylinders 53. The depth and height of the structures are changed, the depth of the left half part is clockwise rotated to be 0.2, 0.3 and 0.4mm respectively, and the height of the left half part is anticlockwise rotated to be 0.2, 0.3 and 0.4mm respectively; the right half part has a clockwise rotation of 0.6, 0.8 and 1.0mm in depth and a counterclockwise rotation of 0.6, 0.8 and 1.0mm in height. Resulting in the structure shown in fig. 9.

In fig. 10, two circular through holes with a diameter of 8mm are formed at a position 54mm from the center of the disk in the horizontal direction so as to pass the connecting column 16 and fix the layer.

In other embodiments of the present application, module four may have 4 semicircular holes with a radius of 5mm at the intersection of the bisector of the four quadrants and the edge of the disk in cross-sectional view.

Example 2

The present embodiment provides a nuclear magnetic resonance multi-module detection die body, which has the same main structure as that of embodiment 1, and the details of the same parts are not repeated. The present embodiment is different from embodiment 1 in that:

referring to fig. 11, the sequence of modules in the nmr multi-module detection phantom of the present embodiment is different from that of embodiment 1, and the specific shape of some modules is slightly different.

Referring to fig. 12, in the present embodiment, the supporting plate 23 of the layer thickness testing module 20 is not provided with a square hole.

Referring to fig. 13, in the present embodiment, the position of the line pair 42 in the spatial resolution testing module 40 is different from that in embodiment 1, and the horizontally arranged line pair 42 is located at the y-axis forward position. The isosceles right triangle through-hole 44 is larger in size than embodiment 1.

Referring to fig. 14, the low resolution testing module in this embodiment has a different three-dimensional structure from that of embodiment 1; no cylinder is provided on the low resolution test module 50. A through hole is arranged on the low-resolution test disc corresponding to the column in the embodiment 1, and the cross section of the through hole is in a square shape with 1/4 areas removed along the diagonal; one corner of the square is positioned in the center of the low-resolution test disc, and the diagonal line passing through the corner is along the negative direction of the y axis; removed 1/4 is the lower right hand corner of the orientation shown in fig. 14.

Example 3

in this embodiment, only the first module and the second module are provided, and the third module and the fourth module are not provided.

In other embodiments of the present application, other combinations of only two of the four modules, such as module two and module three, may also be provided.

Example 4

in this embodiment, only the first module, the second module, and the third module are provided, and the fourth module is not provided.

In other embodiments of the present application, other combinations of only optionally three of the four modules may be provided, such as module two, module three, and module four.

Example 5

in this embodiment, 4 modules are provided, wherein 3 modules are the second module, the third module and the fourth module, and the other 1 module is a layer thickness testing module with other structure, for example, a pair of wedge blocks is provided on the disk.

In other embodiments of the present application, any one or two of the modules one to four in embodiment 1 or embodiment 2 may be replaced with other test modules having the same function, or replaced with a test module having a new function.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. A nuclear magnetic resonance multi-module detection die body is characterized by comprising a shell and a plurality of modules connected in the shell; at least two of the plurality of modules are selected from a layer thickness test module, a spatial linearity test module, a spatial resolution test module, and a low contrast resolution test module;

the layer thickness testing module comprises a supporting plate and a frame which is shaped like a Chinese character 'hui' as a whole; the end face of the frame is connected to the support plate; four surfaces of the outer wall of the frame are provided with inclined plane plates; the 4 inclined plane plates are obliquely crossed with the axis of the frame, and the included angles are equal in degree;

the space linear test module comprises a space linear test disc; a plurality of rectangular array positions are distributed on the spatial linear test disc in a rectangular array manner; a part of the rectangular array positions are provided with spatial linear test through holes;

the spatial resolution testing module comprises a spatial resolution testing disc; the spatial resolution test disc is provided with a plurality of groups of line pairs and a plurality of groups of spatial resolution test through holes; each group of the spatial resolution testing through holes are distributed in an annular array by taking the center of the spatial resolution testing disc as the circle center, and the distribution is more than 150 degrees;

the low-contrast resolution test module comprises a low-contrast resolution test disc; a plurality of annular array positions are distributed on the low-contrast resolution test disc in an annular array; taking a straight line passing through the center of the low-contrast resolution test disc as a boundary line, wherein a circular hole is arranged on the annular array position on one side of the boundary line, and a cylinder is arranged or is vacant on the annular array position on the other side of the boundary line; the depth of the round hole is smaller than the thickness of the low-contrast resolution test disc; the depth of each round hole with the same distance with the center of the annular array is different; the height of each of the cylinders is different from the center of the circular array at the same distance.

2. The NMR multi-module detection die body of claim 1, wherein the support plate is provided with a square hole; the distance between two opposite surfaces of the inner wall of the frame is larger than the size of the square hole.

3. The nuclear magnetic resonance multi-module detection die body as claimed in claim 1, wherein the inclined plane plate is in a shape of a rectangular parallelepiped, and one edge is arranged along a diagonal line of the outer wall of the frame.

4. The NMR multi-module detection phantom according to claim 1, wherein there are two rectangular arrays without the spatial linear test through holes, and an extension line of a connecting line of the two rectangular arrays passes through the center of the spatial linear test disk.

5. The nuclear magnetic resonance multi-module detection die body according to claim 1, wherein the spatial resolution test disc is further provided with isosceles right triangle through holes; and an acute angle vertex of the isosceles right triangle through hole is positioned at the center of the spatial resolution test disc.

6. The NMR multi-module detection phantom according to claim 1, wherein the pairs are arranged in two rows, and the arrangement directions of the two rows of pairs are perpendicular to each other.

7. The NMR multi-module detection phantom according to claim 1, wherein the diameters of the spatial resolution test through holes, the circular holes and the cylinders are increased along with the increase of the distance between the center of the through holes and the center of the circular array.

8. The NMR multi-module detection phantom according to claim 1, wherein the depth values of the circular holes symmetrical about the boundary line are equal to the height values of the cylinders.

9. The NMR multi-module detection phantom according to claim 1, wherein the housing comprises a bottom panel, a side panel and a sealing cover; the side plate is cylindrical; the sealing cover and the bottom panel are both disc-shaped and are respectively connected to the upper end and the lower end of the side plate; two screws are symmetrically arranged on the sealing cover; the lower end face of the screw is flush with the lower end face of the sealing cover.

10. The NMR multi-module detection phantom according to claim 9, wherein at least two connecting posts are provided in the housing; two ends of the connecting column are respectively connected to the sealing cover and the bottom panel; each module is provided with a through hole for the connecting column to pass through at the corresponding position of the connecting column; the circumferential surface of the connecting column is provided with sleeves for fixing the modules, wherein the sleeves are arranged between the adjacent modules, between the uppermost module and the sealing cover and between the lowermost module and the bottom panel.