Radio frequency coil structure

Abstract

The utility model relates to a radio frequency coil structure. The radio frequency coil structure comprises a flexible coating layer and a receiving coil unit, the flexible coating layer is provided with a connecting sub-unit and a connecting mother unit, and the connecting sub-unit is connected to different positions of the connecting mother unit, so that the circumferential size of a detection space defined by the flexible coating layer is changed; therefore, the radio frequency coil structure can adapt to scanning parts of detection objects with different body types, the gap between the radio frequency coil structure and the scanning parts is reduced, the attaching effect of the radio frequency coil structure and the scanning parts is good, and the problem that the scanning parts of different detection objects are not attached due to size difference and shape difference is solved. Therefore, the scanning imaging quality is improved. Meanwhile, the radio frequency coil structure can be worn by a detected object on a related scanning part, and after entering a scanning room, the detected object only needs to lie on an examination bed and connect a cable, so that the complexity of positioning work is greatly reduced, the positioning time is greatly shortened, and the examination efficiency is improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a radio frequency coil structure. Background Art

[0002] As one of the important components of the magnetic resonance system, the coil is mainly used to transmit radio frequency pulses to the object being tested and / or collect magnetic resonance radio frequency signals. The coil is generally placed at the scanning part corresponding to the object being tested. The closer the coil fits the scanned part, the higher the image quality.

[0003] In the related art, there is a gap between the coil and the scanning part, which leads to poor scanning and imaging effect of the magnetic resonance system. Utility Model Content

[0004] Based on this, it is necessary to provide a radio frequency coil structure to address the problem of a gap between the existing coil and the scanning part.

[0005] A radio frequency coil structure suitable for magnetic resonance scanning, the radio frequency coil structure comprising:

[0006] A flexible covering layer, wherein the flexible covering layer is provided with connecting sub-units and connecting mother units along the circumferential direction, and the connecting sub-units can be detachably connected to different positions of the connecting mother unit to adjust the circumferential size of the detection space surrounded by the flexible covering layer along the circumferential direction;

[0007] A plurality of flexible wires form a plurality of receiving coil units and are attached to the flexible covering layer.

[0008] In one of the embodiments, the connecting sub-unit includes a first connecting sub-portion, and the connecting mother unit includes a first connecting mother portion;

[0009] The flexible covering layer includes a main body layer and a patella layer, the first connecting sub-part is arranged on the main body layer; the first connecting mother part is arranged on the patella layer; the first connecting sub-part can be detachably connected to different positions of the first connecting mother part.

[0010] In one embodiment, the main body layer and the patella layer have an overlapping area, and the patella layer can be connected to different positions of the main body layer to adjust the area of ​​the overlapping area.

[0011] In one of the embodiments, the patella sheet layer can move along the circumferential direction so that the end portion of the patella sheet layer along the axial direction can be detachably connected to different positions of the main body sheet layer.

[0012] In one of the embodiments, one end of the patella layer along the circumferential direction is fixedly connected to the main body layer; and the first connecting female portion is arranged at the other end of the patella layer along the circumferential direction.

[0013] In one of the embodiments, the patella layer is convex in a direction away from the receiving coil unit; and the main body layer is concave in a direction away from the receiving coil unit.

[0014] In one embodiment, the connecting sub-unit includes a second connecting sub-portion, and the connecting mother unit includes a second connecting mother portion;

[0015] The main body layer includes a thigh layer and a patella matching layer distributed along the axial direction, the first connecting sub-portion is arranged on the patella matching layer; the second connecting sub-portion and the second connecting mother portion are respectively arranged at two ends of the thigh layer along the circumferential direction; the second connecting sub-portion can be detachably connected to different positions of the second connecting mother portion.

[0016] In one embodiment, the connecting sub-unit includes a third connecting sub-portion spaced apart from the second connecting sub-portion, and the connecting female unit includes a third connecting female portion spaced apart from the second connecting female portion;

[0017] The main body layer also includes a calf layer distributed axially with the thigh layer, the third connecting sub-portion and the third connecting mother portion are respectively arranged at the two ends of the calf layer along the circumferential direction; the third connecting sub-portion can be detachably connected to different positions of the third connecting mother portion; the size of the calf layer along the circumferential direction is smaller than the size of the thigh layer along the circumferential direction.

[0018] A wearable radio frequency coil structure, comprising:

[0019] A plurality of flexible conductors form a plurality of receiving coil units;

[0020] A flexible covering layer, a plurality of the receiving coil units are attached to the flexible covering layer, one end of the flexible covering layer is provided with a connecting sub-unit, and the other end of the flexible covering layer is provided with a connecting mother unit;

[0021] The connecting sub-unit can be connected to the connecting mother unit so that the radio frequency coil structure forms a wearable structure;

[0022] The wearable structure can adapt to detection objects of various sizes or shapes, and the inner surface of the wearable structure can fit the detection object when it is worn.

[0023] In one embodiment, the wearable structure is in the shape of a tube, a helmet, a boot or a shoulder blade when worn.

[0024] The above-mentioned radio frequency coil structure includes a flexible covering layer and a receiving coil unit. The flexible covering layer is provided with a connecting sub-unit and a connecting mother unit. The connecting sub-unit is connected to different positions of the connecting mother unit, so that the circumferential size of the detection space surrounded by the flexible covering layer changes, so that it can adapt to the scanning part of the detection object of different body shapes, reduce the gap between the radio frequency coil structure and the scanning part, so that the radio frequency coil structure and the scanning part have a better fitting effect, solve the problem of non-fitting caused by the size difference and shape difference of the scanning part of different detection objects, thereby improving the scanning imaging quality. At the same time, the radio frequency coil structure can also be worn by the detection object to the relevant scanning part by itself. After entering the scanning room, it only needs to lie on the examination bed and connect the cables, which greatly reduces the complexity and time of positioning work and improves the inspection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] FIG1 is a schematic diagram of a radio frequency coil structure provided in an embodiment of the present application forming a wearable structure.

[0026] FIG. 2 is a schematic diagram of the radio frequency coil structure shown in FIG. 1 in an unfolded state.

[0027] FIG. 3 is a schematic diagram of a flexible covering layer in the radio frequency coil structure shown in FIG. 2 .

[0028] FIG. 4 is a side view of the flexible covering layer in the RF coil structure shown in FIG. 3 .

[0029] FIG. 5 is a schematic diagram of the radio frequency coil structure shown in FIG. 3 connected to a cable unit.

[0030] FIG6 is a schematic diagram of a radio frequency coil structure provided in another embodiment of the present application forming a wearable structure.

[0031] FIG. 7 is a schematic diagram of the RF coil structure shown in FIG. 6 in an expanded state.

[0032] Figure numbers: 10, RF coil structure; 100, flexible covering layer; 110, main body layer; 111, thigh layer; 112, patella matching layer; 113, calf layer; 114, arc opening; 120, patella layer; 200, connecting subunit; 210, first connecting subsection; 220, second connecting subsection; 230, third connecting subsection; 300, connecting mother unit; 310, first connecting mother section; 320, second connecting mother section; 330, third connecting mother section; 400, receiving coil unit; 510, first connecting member; 520, second connecting member; 610, first cable; 620, connector; 630, second cable; 640, amplifier. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0034] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0035] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0037] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0039] Referring to FIGS. 1 to 3 , a radio frequency coil structure 10 provided in an embodiment of the present application includes a flexible covering layer 100 and a plurality of receiving coil units 400. The flexible covering layer 100 is provided with a connecting sub-unit 200 and a connecting mother unit 300 along the circumferential direction. The connecting sub-unit 200 can be detachably connected to different positions of the connecting mother unit 300 to adjust the circumferential size of the detection space surrounded by the flexible covering layer 100. A plurality of flexible wires form a plurality of receiving coil units 400, and the receiving coil units 400 are attached to the flexible covering layer 100. As shown in FIG. 2 , when the radio frequency coil structure 10 is in an unfolded state, its circumferential direction is the X direction in the figure.

[0040] The above-mentioned RF coil structure 10 is connected to different positions of the connecting mother unit 300 by connecting the sub-unit 200, so that the circumferential size of the detection space surrounded by the flexible covering layer 100 changes, so that it can adapt to the scanning part of the detection object of different body shapes, reduce the gap between the RF coil structure 10 and the scanning part, so that the RF coil structure 10 and the scanning part have a better fit effect, solve the problem of non-fitting caused by the size difference and shape difference of the scanning part of different detection objects, thereby improving the scanning imaging quality. At the same time, the RF coil structure 10 can also be worn by the detection object to the relevant scanning part by itself. After entering the scanning room, it only needs to lie on the examination bed and connect the cables, which greatly reduces the complexity and time of positioning work and improves the inspection efficiency.

[0041] Among them, the RF coil structure 10 can be used for detection of the head, elbows, shoulders, knees or ankles, etc., and has a wide range of uses. The flexible covering layer 100 can be made of flexible materials such as felt or PU using a hot pressing or sewing process, so that the flexible covering layer 100 has a certain flexibility and can be unfolded into a planar structure for the detection object to wear; after wearing, it can be wound into a cylindrical structure to better fit the scanning part. Multiple receiving coil units 400 are arranged in an array, and adjacent receiving coil units 400 overlap each other for decoupling to reduce the signal-to-noise ratio of the RF coil structure 10. Moreover, the receiving coil unit 400 is made of a flexible material, which can improve the softness of the RF coil structure 10, facilitate the RF coil structure 10 to wrap the scanning or unfold the attached scanning, ensure the imaging effect of the scanning part, and improve the comfort during use. Optionally, the receiving coil unit 400 is made of a flexible conductive wire.

[0042] As shown in Fig. 3, taking the application of the RF coil structure 10 on the knee as an example, in one embodiment, the connecting subunit 200 includes a first connecting subunit 210, the connecting mother unit 300 includes a first connecting mother unit 310; the flexible covering layer 100 includes a main body layer 110 and a patellar layer 120, the first connecting subunit 210 is arranged on the main body layer 110; the first connecting mother unit 310 is arranged on the patellar layer 120. By changing the connection position of the first connecting mother unit 310 and the first connecting subunit 210, the size of the detection space enclosed by the RF coil structure 10 is adjusted to match the size of the knee joint of the detection object.

[0043] For example, in the view shown in FIG3 , when the patient is thin, the first connecting sub-portion 210 can be connected to the left end of the first connecting mother portion 310, so that the detection space is reduced; when the patient is fat, the first connecting sub-portion 210 can be connected to the right end of the first connecting mother portion 310, so that the detection space is increased. Among them, the first connecting sub-portion 210 can be a Velcro sub-tie, the first connecting mother portion 310 can be a Velcro mother patch, and the connection area of ​​the first connecting mother portion 310 is larger than the area of ​​the first connecting sub-portion 210, so as to facilitate the adjustment of the connection position of the two. In other embodiments, the first connecting sub-portion and the first connecting mother portion can also be an elastic binding structure or a buckle structure, etc.

[0044] As shown in FIG. 2 and FIG. 3 , in one embodiment, the main body layer 110 and the patella layer 120 have an overlapping area. By connecting the patella layer 120 to different positions of the main body layer 110 to adjust the size of the overlapping area, the size of the area of ​​the patella layer 120 extending relative to the main body layer 110 can be changed, thereby changing the size of the detection space enclosed by the RF coil structure 10, thereby adapting to the body shape differences at the scanning site.

[0045] As shown in FIG3 , in one embodiment, the patellar sheet 120 can be moved in the circumferential direction so that the end of the patellar sheet 120 in the axial direction can be detachably connected to different positions of the main sheet 110. In the figure, the circumferential direction of the radio frequency coil structure 10 is indicated by an arc arrow, and the axial direction of the radio frequency coil structure 10 is indicated by the Z direction. By moving the patellar sheet 120 in the circumferential direction, the area of ​​the overlapping region of the patellar sheet 120 and the main sheet 110 is changed, so that the size of the area of ​​the patellar sheet 120 extending relative to the main sheet 110 can be changed, and then the size of the detection space surrounded by the radio frequency coil structure 10 can be changed to adapt to the body shape differences at the scanning site.

[0046] As shown in FIG3 , in one embodiment, one end of the patellar sheet 120 along the circumferential direction is fixedly connected to the main sheet 110, and the first connecting female portion 310 is disposed at the other end of the patellar sheet 120 along the circumferential direction. By fixing one end of the patellar sheet 120 to the main sheet 110, the possibility of adjustment deviation of the patellar sheet 120 is reduced, and the adjustment reliability is improved.

[0047] As shown in FIG3 , in other embodiments, the patellar lamella 120 may move axially relative to the main body lamella 110, and the two ends of the patellar lamella 120 are connected to the main body lamella 110 respectively through the first connector 510 and the second connector 520. For example, the first connector 510 and the second connector 520 are elastic bands, and the connection position of the patellar lamella 120 and the main body lamella 110 is changed by stretching or contracting the elastic bands, thereby changing the size of the detection space. In other embodiments, the first connector and the second connector may also be a Velcro structure or a buckle structure, etc.

[0048] As shown in Fig. 2 and Fig. 4, in one embodiment, the patellar layer 120 is convex in the direction away from the receiving coil unit 400, and the main body layer 110 is concave in the direction away from the receiving coil unit 400. Through this arrangement, the patellar layer 120 can adapt to the convexity at the patella of the knee joint, and the main body layer 110 can adapt to the concave at the popliteal fossa of the knee joint, so that the radio frequency coil structure 10 has a better fit with the scanning part.

[0049] As shown in Fig. 3, in one embodiment, the area of ​​the main body layer 110 for connecting with the patella layer 120 is provided with an arc-shaped opening 114, so that the radio frequency coil structure 10 can avoid the protruding part of the patella after winding. Correspondingly, the shape of the patella layer 120 is hexagonal, so that after the patella layer 120 and the main body layer 110 are wound, the patella layer 120 can cover the arc-shaped opening 114.

[0050] As shown in FIG6 , in one embodiment, the connection subunit 200 includes a second connection subunit 220, and the connection mother unit 300 includes a second connection mother unit 320; the main body layer 110 includes a thigh layer 111 and a patella matching layer 112 distributed along the axial direction, and the first connection subunit 210 is arranged on the patella matching layer 112; the second connection subunit 220 and the second connection mother unit 320 are respectively arranged at two ends of the thigh layer 111 along the circumferential direction; the second connection subunit 220 can be detachably connected to different positions of the second connection mother unit 320. It can be understood that the patella matching layer 112 can be attached to the patella of the detection object, and the thigh layer 111 can be attached to the thigh of the detection object, so as to better adapt to the size difference between different parts, improve the tightness of the fit, and improve the imaging quality.

[0051] As shown in FIG6 , in one embodiment, the connecting subunit 200 includes a third connecting subunit 230 spaced apart from the second connecting subunit 220, and the connecting mother unit 300 includes a third connecting mother unit 330 spaced apart from the second connecting mother unit 320; the main sheet 110 also includes a calf sheet 113 axially distributed with the thigh sheet 111, and the third connecting subunit 230 and the third connecting mother unit 330 are respectively arranged at two ends of the calf sheet 113 along the circumferential direction; the third connecting subunit 230 can be detachably connected to different positions of the third connecting mother unit 330; the size of the calf sheet 113 along the circumferential direction is smaller than the size of the thigh sheet 111 along the circumferential direction. In this way, the size difference between the thigh side diameter and the calf side diameter of the knee joint is adapted, so that the knee joint and the radio frequency coil structure 10 have a better fit. By setting the main sheet 110 as a three-section type connected in sequence, the size difference between the thigh side, the patella side and the calf side can be better matched, the fit effect of the radio frequency coil structure 10 and the knee joint is improved, and the imaging quality is improved.

[0052] As shown in FIG5 , in one embodiment, a first cable 610 is connected to the flexible covering layer 100, a connector 620 is connected to the first cable 610, an amplifier 640 is built into the examination bed, and the amplifier 640 and the connector 620 are connected via a second cable 630. The electrical connection between the RF coil structure 10 and the amplifier 640 can be achieved through the connector 620. In other embodiments, the amplifier can also be built into the RF coil structure, and a corresponding signal transmitting component is provided on the RF coil structure, and a corresponding signal receiving component is provided at the imaging scanning device end, that is, the RF coil structure is a wireless coil.

[0053] As shown in Figures 1 and 2, on the other hand, an embodiment of the present application also provides a wearable radio frequency coil structure 10, including a flexible coating layer 100 and a plurality of receiving coil units 400 formed by a plurality of flexible wires, wherein the plurality of receiving coil units 400 are attached to the flexible coating layer 100; a connecting subunit 200 is provided at one end of the flexible coating layer 100, and a connecting mother unit 300 is provided at the other end, and the connecting subunit 200 can be connected to the connecting mother unit 300, so that the radio frequency coil structure forms a wearable structure. The wearable structure can be worn by the detection object to the relevant scanning part by itself, and after entering the scanning room, it only needs to lie on the examination bed and connect the cable, which greatly reduces the complexity and positioning time of the positioning work and improves the inspection efficiency. Since the wearable structure can adapt to detection objects of various sizes or shapes, that is, when the wearable structure is worn, its inner surface can fit the detection object, so that the fitting effect of the wearable structure and the scanning part of the detection object is better, thereby improving the scanning imaging quality. Among them, when the wearable structure is worn, it can be cylindrical, helmet-shaped, boot-shaped or shoulder-shaped to adapt to the corresponding scanning part.

[0054] Furthermore, an embodiment of the present application also provides an imaging scanning system, including the above-mentioned radio frequency coil structure. The imaging scanning system includes but is not limited to a magnetic resonance system, a positron emission tomography and magnetic resonance multimodal system, an ultrasound and magnetic resonance multimodal system. The imaging scanning system has a wearable radio frequency coil structure that can be worn by the detection object, and the circumferential size of the cylinder surrounded by the flexible coating layer is changed by connecting the sub-unit to the different positions of the connecting mother unit, so that it can adapt to the scanning part of the detection object of different body shapes, reduce the gap between the radio frequency coil structure and the scanning part, so that the flexible coating layer is closely fitted to the scanning part of the detection object, and improve the signal-to-noise ratio of the scanning image of the imaging scanning system, thereby improving the imaging quality of the imaging scanning system.

[0055] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A radio frequency coil structure suitable for magnetic resonance scanning, characterized in that: The radio frequency coil structure comprises: A flexible covering layer (100), wherein the flexible covering layer (100) is provided with a connecting sub-unit (200) and a connecting mother unit (300) along the circumferential direction, and the connecting sub-unit (200) can be detachably connected to different positions of the connecting mother unit (300) to adjust the circumferential size of a detection space enclosed by the flexible covering layer (100) along the circumferential direction; A plurality of flexible conductive wires form a plurality of receiving coil units (400) and are attached to the flexible covering layer (100).

2. The radio frequency coil structure according to claim 1, characterized in that: The connecting sub-unit (200) comprises a first connecting sub-part (210), and the connecting mother unit (300) comprises a first connecting mother part (310); The flexible covering layer (100) comprises a main body layer (110) and a patella layer (120); the first connecting sub-portion (210) is arranged on the main body layer (110); the first connecting mother portion (310) is arranged on the patella layer (120); and the first connecting sub-portion (210) can be detachably connected to different positions of the first connecting mother portion (310).

3. The radio frequency coil structure according to claim 2, characterized in that: The main body layer (110) and the patella layer (120) have an overlapping area, and the patella layer (120) can be connected to different positions of the main body layer (110) to adjust the area of ​​the overlapping area.

4. The radio frequency coil structure according to claim 3, characterized in that: The patellar sheet layer (120) can move along the circumferential direction, so that the end portion of the patellar sheet layer (120) along the axial direction can be detachably connected to different positions of the main body sheet layer (110).

5. The radio frequency coil structure according to claim 4, characterized in that: One end of the patella layer (120) along the circumferential direction is fixedly connected to the main body layer (110); the first connecting female part (310) is arranged at the other end of the patella layer (120) along the circumferential direction.

6. The radio frequency coil structure according to claim 2, characterized in that: The patellar sheet layer (120) is convex in a direction away from the receiving coil unit (400); and the main body sheet layer (110) is concave in a direction away from the receiving coil unit (400).

7. The radio frequency coil structure according to claim 2, characterized in that: The connecting sub-unit (200) comprises a second connecting sub-part (220), and the connecting mother unit (300) comprises a second connecting mother part (320); The main body layer (110) comprises a thigh layer (111) and a patella matching layer (112) distributed along the axial direction; the first connecting sub-portion (210) is arranged on the patella matching layer (112); the second connecting sub-portion (220) and the second connecting mother portion (320) are respectively arranged at two ends of the thigh layer (111) along the circumferential direction; and the second connecting sub-portion (220) can be detachably connected to different positions of the second connecting mother portion (320).

8. The radio frequency coil structure according to claim 7, characterized in that: The connecting sub-unit (200) comprises a third connecting sub-part (230) spaced apart from the second connecting sub-part (220), and the connecting female unit (300) comprises a third connecting female part (330) spaced apart from the second connecting female part (320); The main body layer (110) further comprises a calf layer (113) which is distributed along the axial direction with the thigh layer (111); the third connecting sub-portion (230) and the third connecting mother portion (330) are respectively arranged at two ends of the calf layer (113) along the circumferential direction; the third connecting sub-portion (230) can be detachably connected to different positions of the third connecting mother portion (330); the size of the calf layer (113) along the circumferential direction is smaller than the size of the thigh layer (111) along the circumferential direction.

9. A wearable radio frequency coil structure, characterized in that: The radio frequency coil structure comprises: A plurality of flexible wires forming a plurality of receiving coil units (400); A flexible covering layer (100), a plurality of receiving coil units (400) being attached to the flexible covering layer (100), a connecting sub-unit (200) being provided at one end of the flexible covering layer (100), and a connecting mother unit (300) being provided at the other end; The connecting subunit (200) can be connected to the connecting main unit (300) so that the radio frequency coil structure forms a wearable structure; The wearable structure can adapt to detection objects of various sizes or shapes, and the inner surface of the wearable structure can fit the detection object when it is worn.

10. The radio frequency coil structure according to claim 9, characterized in that: The wearable structure is in the shape of a tube, a helmet, a boot or a shoulder blade when worn.

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