CN108072853B - Radio frequency body coil and method of making same - Google Patents

Abstract

The invention provides a radio frequency body coil and a manufacturing method thereof.

Description

Radio frequency body coil and method of making same

Technical Field

The invention relates to the field of magnetic resonance medical imaging, in particular to a radio frequency body coil and a manufacturing method thereof.

Background

A radio frequency body coil is an important component in a magnetic resonance imaging apparatus and generally comprises a support body configured with an inner cavity for accommodating a patient-carrying examination bed, the outer surface of the support body being provided with a radio frequency antenna and other electronic components, the radio frequency body coil being operable to excite the nuclei in the patient's body to spin to generate magnetic resonance signals. The radio frequency body coil is mounted inside the gradient coil with its outer surface adjacent the gradient coil and with a small gap in the middle. The outside of the gradient coil is used for installing a main magnet.

During the scanning imaging process of a patient, heat radiated by the gradient coil and the radio frequency antenna is gathered in the middle area of the gradient coil, so that the area between the radio frequency body coil and the gradient coil becomes a heat concentration area. The support body of the radio frequency body coil is generally made of glass fiber reinforced plastic, although glass fiber has low heat conduction capacity, the high polymer plastic serving as the base material has high heat conduction capacity, so that heat in the heat concentration area is easily transferred to the inner surface of the radio frequency body coil through the support body, and the body of a patient in the inner cavity is injured.

In the prior art, a dedicated cooling system is designed for this heat concentration zone to avoid heat transfer from the outer surface of the rf body coil to the inner surface of the rf body coil through its support. For example, in one conventional product, an air chamber needs to be disposed near the inner surface of the rf body coil, the air chamber is communicated with the heat concentration region, cooled air needs to be extracted by an air extraction device, the extracted air is blown to a heat exchanger for cooling by a blower, the cooled air is delivered to the air chamber through an air duct communicated with the air chamber, and is further delivered to the heat concentration region for heat dissipation, and an air outlet structure needs to be designed at the end of the rf body coil to achieve a better heat dissipation effect.

Cooling systems like this require large design and production costs, such as expensive materials, complex structures and large space requirements, and require a lot of time and effort in the development, installation and maintenance phases.

Therefore, there is a need to provide a new rf body coil with better thermal insulation effect, which can improve the thermal insulation effect of the rf body coil, and can properly reduce the design cost of the cooling system or even eliminate the cooling system.

Disclosure of Invention

It is an object of the present invention to provide a novel rf body coil and method for making the same that provides better thermal insulation.

An exemplary embodiment of the present invention provides a radio frequency body coil, which includes a support body including a thermal insulation layer and at least one support layer, the thermal insulation layer and the at least one support layer being compounded together, the thermal insulation layer and the support layer being of different materials, the thermal insulation layer being made of a thermal insulation material.

Exemplary embodiments of the present invention also provide a method of manufacturing a radio frequency body coil, comprising the steps of: forming at least one support layer; providing an insulating layer and compounding the insulating layer with the at least one support layer. The heat insulation layer and the supporting layer are made of different materials, and the heat insulation layer is made of heat insulation materials.

Other features and aspects will become apparent from the following detailed description, the accompanying drawings, and the claims.

Drawings

The invention may be better understood by describing exemplary embodiments thereof in conjunction with the following drawings, in which:

FIG. 1 is a schematic cross-sectional view of a radio frequency body coil provided in accordance with one embodiment of the present invention;

FIG. 2 is a schematic longitudinal cross-sectional view of the RF body coil of FIG. 1;

fig. 3 and 4 are schematic cross-sectional views of rf body coils according to further embodiments of the present invention;

FIG. 5 is a schematic longitudinal cross-sectional view of an RF body coil according to another embodiment of the present invention;

FIG. 6 is a cross-sectional view of an RF body coil according to another embodiment of the present invention;

fig. 7 and 8 are schematic longitudinal sectional views of a radio frequency body coil according to another embodiment of the present invention;

figure 9 is a flow chart of a method of manufacturing a radio frequency body coil according to one embodiment of the present invention;

figure 10 is a flow chart of a method of manufacturing a radio frequency body coil according to another embodiment of the present invention;

figure 11 is a comparison graph of a thermal test conducted on a radio frequency body coil of an embodiment of the present invention and a prior art radio frequency body coil.

Detailed Description

While specific embodiments of the invention will be described below, it should be noted that in the course of the detailed description of these embodiments, in order to provide a concise and concise description, all features of an actual implementation may not be described in detail. It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions are made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another. Moreover, it should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions must be made to achieve the developers' specific goals, such as compliance with system-related and business-related constraints, which may vary from one implementation to another.

Unless otherwise defined, technical or scientific terms used in the claims and the specification should have the ordinary meaning as understood by those of ordinary skill in the art to which the invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The terms "a" or "an," and the like, do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalent, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, nor are they restricted to direct or indirect connections.

Fig. 1 is a schematic cross-sectional view of a radio frequency body coil according to an embodiment of the present invention, and fig. 2 is a schematic longitudinal cross-sectional view of the radio frequency body coil in fig. 1, wherein fig. 2 further shows a radio frequency antenna disposed on an outer surface of the support. As shown in fig. 1 and 2, the radio frequency body coil includes a support body 10. It will be appreciated by those skilled in the art that the support body 10 may be a hollow cylinder having an inner cavity 11, the inner cavity 11 being used for accommodating a patient-carrying couch 20 during scanning imaging of a patient, and the outer surface of the support body 10 may be used for arranging the radio frequency antenna 15 and other components so that the radio frequency body coil emits radio frequency excitation to generate magnetic resonance signals for imaging in the patient.

The support body 10 comprises a thermal insulation layer 12 and at least one support layer, wherein the thermal insulation layer 12 and the at least one support layer are compounded together, the materials of the thermal insulation layer and the support layer are different, and the thermal insulation layer 12 is made of thermal insulation materials.

Specifically, the material of the thermal insulation layer 12 may include at least one of aerogel, ceramic fiber paper, or high polymer foamed thermal insulation plastic.

The material of the at least one support layer may comprise glass fibre reinforced plastic.

In one embodiment, the at least one support layer may include an inner support layer 14 and an outer support layer 16, with the thermal insulation layer 12 disposed between the inner support layer 14 and the outer support layer 16. I.e., inner support layer 14 and outer support layer 16 sandwich insulating layer 12 to form a sandwich structure. In this way, the support body 10 has a more stable structure, and the structure, process and function of the existing radio frequency antenna and other electronic components arranged on the outer surface of the support body are not affected. Further, by making the thermal insulation layer 12 of aerogel, ceramic fiber paper, etc. in the intermediate layer, the thickness of the thermal insulation layer 12 can be made very small, and thus the thickness of the existing support can be unchanged or increased only slightly, so that it is not necessary to adjust the dimensions of other relevant devices in the magnetic resonance imaging system, such as the dimensions of the main magnet and the gradient coil.

Fig. 3 and 4 are schematic cross-sectional views of rf body coils according to further embodiments of the present invention. As shown in fig. 3 and 4, the insulation layer 12 may include an insulation felt layer 121 disposed on an outer surface of a support layer (e.g., the inner support layer 14), and the insulation felt layer 121 may also be a layer of insulation sheet. The number of the heat-insulating felt layers or heat-insulating sheet layers 121 may be one as shown in fig. 3, or may be plural as shown in fig. 4. Each layer 121 of thermal blanket or sheet includes one or more thermal blankets or sheets arranged side-by-side (along the axis of the rf body coil).

It will be understood by those skilled in the art that the above-mentioned "laying", "disposing", etc. may include fixing by means of adhesion or other fixing means, and the insulating layer 12 may be fixed therein only by the force of the pressing of the inner support layer 14 and the outer support layer 16.

As shown in fig. 1-4, in one embodiment, the insulating layer 12 may be provided over a substantial area between the inner and outer support layers 14, 16, i.e., the insulating layer 12 may almost completely overlap the inner and outer support layers 14, 16, the three layers may be approximately equal in area, e.g., no insulating layer may be provided at only both ends of the rf body coil.

In particular, the outer support layer 16 and the inner support layer 14 are interconnected at both ends of the rf body coil to form two ends 17, the insulating layer 12 extending from one of the ends 17 to the other end 17. The two ends prevent the insulation from falling out from between the outer support layer 16 and the inner support layer 14.

Fig. 5 is a longitudinal sectional view of a rf body coil according to another embodiment of the invention. As shown in fig. 5, the heat insulation layer 12 may be further provided in a partial region between the inner support layer 14 and the outer support layer 16, for example, the heat insulation layer 12 may be provided only in a region close to the heat-generating component disposed on the outer surface of the body coil, which not only ensures the heat insulation effect, but also saves the cost and increases the strength.

In particular, the outer support layer 16 and the inner support layer 14 may be interconnected at a position between the two ends 17 forming a partition 19, the number of the partitions 19 may be one or more, and the insulating layer 12 may be divided into at least two parts by the partitions 19.

As shown in fig. 3-4, each insulation blanket or sheet may have a seam 1213 between one end and the other end thereof. For example, when an insulation blanket is joined at both ends after one turn around the support layer 14 to form a closed cylindrical structure, the joining results in a fine seam 1213 in order to avoid overlapping of the ends. A greater heat conduction may occur at the seam 1213 so that heat is transferred from the outer surface to the inner surface of the support body 10.

FIG. 6 is a schematic cross-sectional view of a radio frequency body coil provided in accordance with another embodiment of the present invention; as shown in fig. 6, in order to reduce the influence of heat conduction at the joints 1213, in one embodiment, a multi-layer design as shown in fig. 4 or fig. 6 may be used, in which the joints 1213 of the lower layer are covered with another thermal insulation felt or thermal insulation sheet, and if the spliced joints 1213 are also generated at the upper layer, the adjacent joints 1213 are spaced such that the upper layer covers the joints 1213 of the lower layer, and the lower layer blocks the joints 1213 of the upper layer, thereby avoiding communication between the two joints 1213 and increasing heat conduction.

To further avoid the influence of heat conduction at the seam 1213 on the patient, the seam 1213 may be arranged below the couch 20, i.e. opposite the back of the couch, as shown in fig. 6. For example, the RF body coil of the present invention includes a bed top region 17 (e.g., above the dashed line in FIG. 6) and a bed bottom region 13 (e.g., below the dashed line in FIG. 6) interconnected as a hollow cylinder, the bed bottom region 13 being adapted to oppose the back side 21 of the bed 20, the bed top region 17 being adapted to oppose the front side 23 of the bed 20, and the seam 1213 may be disposed in the bed bottom region 13.

Fig. 7 and 8 are schematic longitudinal sectional views of a radio frequency body coil according to another embodiment of the present invention, which is similar to the embodiment shown in fig. 1 to 6 in structure and principle, and includes a support 50, the support 50 includes a thermal insulation layer 52 and at least one support layer, the thermal insulation layer 52 and the at least one support layer are combined together, wherein the thermal insulation layer 52 and the support layer are made of different materials, and the thermal insulation layer 52 is made of a thermal insulation material.

The material of the insulation layer 52 may include at least one of aerogel, ceramic fiber paper, or high polymer foam insulation plastic.

The material of the at least one support layer may comprise glass fibre reinforced plastic.

The present embodiment may be different from the embodiments shown in fig. 1 to 6 in that: as shown in fig. 7, the at least one support layer may include an inner support layer 54, the outer surface of the inner support layer 54 is provided with a groove 541, and the thermal insulation layer 52 is embedded in the groove 541.

The number of the grooves 541 can be one or more, the size and the number of the grooves 541 can be designed according to actual needs, similar to the embodiment shown in fig. 1 to 6, a large-area groove 541 can be provided on the upper surface of the inner supporting layer 54, so that the thermal insulation layer 52 can be compounded on the inner supporting layer 54 in a large area, or the grooves 541 can be provided only at a position close to the heat-prone device.

As shown in fig. 8, as an embodiment, an outer support layer 56 may be further compounded on the outer surface of the insulation layer 52 in the inner support layer 54 and the groove 541 thereof.

The material of the inner and outer support layers 54, 56 may be the same as the material of the inner and outer support layers 14, 16. The insulating layer 52 may be the same material, structure or process as the insulating layer 12, for example, the insulating layer 52 may include an insulating felt layer, an insulating sheet layer laid in the groove 541 of the inner support layer 54. The number of the heat insulation felt layer and the heat insulation sheet layer can be one or more. Each layer or sheet of insulation felt may comprise one or more insulation felts or sheets arranged side-by-side.

By providing the inner support layer 54 with grooves, the thermal insulation layer 52 can be made of a material with a larger thickness, such as a high polymer foam thermal insulation plastic, or an insulation felt layer or an insulation sheet layer made of aerogel thermal insulation felt or ceramic fiber paper.

An embodiment of the present invention also provides a method of manufacturing a radio frequency body coil that may be used to manufacture a radio frequency body coil as shown in any of the embodiments of fig. 1-8, the method comprising the steps of:

forming at least one support layer; and the number of the first and second groups,

providing a thermal insulation layer and compounding the thermal insulation layer with the at least one supporting layer, wherein the materials of the thermal insulation layer and the supporting layer are different, and the thermal insulation layer is made of thermal insulation materials.

Wherein the step of "forming at least one insulating layer" may be used to form inner support layer 14 and/or outer support layer 16 as shown in fig. 1-6, and may also be used to form inner support layer 54 and/or outer support layer 56 as shown in fig. 5-6. Specifically, the process of forming the at least one support layer may include the steps of:

winding and molding the glass fiber yarns presoaked with the high-polymerization synthetic resin; and the number of the first and second groups,

and curing the wound glass fiber yarns at high temperature to form a support layer.

For example, when it is desired to form the inner support layer 14 or 54, fiberglass filaments pre-impregnated with a high polymer synthetic resin may be wound onto a mandrel and cured at elevated temperatures; when it is desired to form the outer support layer 16 or 56, fiberglass threads pre-impregnated with a high polymer synthetic resin may be wound around the outer surface of the inner support layer 14 or 54 and the insulation layer 12 or 52 secured thereto and cured at an elevated temperature.

Thus, the step of "forming at least one support layer" may comprise: an inner support layer is formed on the mandrel. The mandrel may be a cylindrical die, for example, which may be rolled while being wound.

The step of providing and combining the thermal insulation layer with the at least one support layer may comprise: the heat insulation layer is fixed on the inner support layer, and specifically, the heat insulation layer may include: the heat insulating layer is adhered to the inner support layer, but the first support layer may be fixed to the inner support layer by other means.

The above "forming at least one support layer" may further include: forming an outer support layer overlying the inner support layer and an outer surface of the insulation layer thereon.

Through the steps, the heat insulation layer which is provided with the inner supporting layer, the outer supporting layer and the middle layer arranged between the inner supporting layer and the outer supporting layer can be formed.

In the step of fixing the thermal insulation layer on the inner support layer, the thermal insulation layer may be fixed on almost all areas of the inner support layer to form the rf body coil shown in fig. 1-4, or the thermal insulation layer may be fixed on only a small area of the inner support layer to form the rf body coil shown in fig. 5.

Specifically, the "fixing the thermal insulation layer on the inner support layer" may include: extending a layer of thermal insulation from one to the other of two ends of a radio frequency body coil, the two ends being located at respective ends (e.g., end 17) of the radio frequency body coil; the "outer support layer forming an outer surface of the insulation layer overlying the inner support layer" may include: the outer support layer is joined at both ends of the radio frequency body coil to form the two ends such that the insulation layer is located between the two ends.

Further, the "fixing the thermal insulation layer on the inner support layer" may further include: at least two heat insulation layers which are mutually spaced along the axial direction of the radio frequency body coil are fixed on the inner supporting layer; the "outer support layer forming an outer surface of the insulation layer covering the inner support layer and the insulation layer thereon" further includes: the outer support layers are joined at the spaces between adjacent insulation layers to form a spacer (e.g., spacer 19).

Optionally, the step of providing a thermal insulation layer and compounding the thermal insulation layer with the at least one support layer may specifically include: one or more felt or sheet layers are laminated to a support layer. The felt-like layer and the sheet-like layer may comprise, for example, aerogel felt and ceramic fiber paper sheets, respectively. For example, a plurality of aerogel blankets or sheets of ceramic fiber paper may be laid or stacked on the inner support layer. One end of at least one of the felt-like layers or the sheet-like layers is spliced with the other end thereof to form a seam, and in order to reduce the heat conductivity at the seam, the alignment of the seam can be avoided in the stacking process, namely, the adjacent seams are arranged at intervals. Further, it is possible to arrange all seams as far as possible within a small arc of the hollow cylinder formed by the inner support layer, so that these seams can all be located opposite the back of the patient bed when the radio frequency body coil is mounted.

Alternatively, the step of "forming at least one support layer" may include: forming an inner support layer (e.g., inner support layer 54) on the mandrel and providing a groove (e.g., groove 541) in an outer surface of the inner support layer; the step of providing and combining the thermal insulation layer with the at least one support layer may comprise: an insulating layer (e.g., insulating layer 56) is embedded in the groove. The embedding may include embedding in the groove by gluing, spraying or other means.

Figure 9 is a flow chart of a method of manufacturing a radio frequency body coil in accordance with one embodiment of the present invention. As shown in fig. 9, the method includes the steps of:

step S91: winding glass fiber yarns pre-impregnated with high-polymerization synthetic resin on a mandrel;

step S92: curing the fiberglass filaments wound on the mandrel at a high temperature to form an inner support layer, such as inner support layer 14;

step S93: an aerogel felt, a ceramic fiber paper sheet or a foaming thermal insulation board is stuck on the inner supporting layer 14 to form the thermal insulation layer 12; in this step, a plurality of aerogel felts, ceramic fiber paper sheets or foamed heat insulation plates may be stuck side by side on one layer, or a plurality of layers of aerogel felts, ceramic fiber paper sheets or foamed heat insulation plates may be stacked to achieve the required thickness of the heat insulation layer 12;

step S94: the outer surfaces of the inner supporting layer 14 and the heat insulation layer 12 fixed on the inner supporting layer are wound with glass fiber yarns pre-impregnated with high polymer synthetic resin;

step S95: the glass fiber yarn wound in step S94 is cured at a high temperature to form the outer support layer 16.

Through the above steps S91-S95, the support body 10 having the inner and outer support layers and the intermediate heat insulating layer can be obtained.

Figure 10 is a flow chart of a method of manufacturing a radio frequency body coil in accordance with another embodiment of the present invention. As shown in fig. 10, the method comprises the steps of:

step S101: winding glass fiber yarns pre-impregnated with high-polymerization synthetic resin on a mandrel;

step S102: high temperature curing of the fiberglass filaments wound on the mandrel to form an inner support layer, such as inner support layer 54;

step S103: forming a groove 541 in the inner support layer 54;

step S104: an aerogel blanket, a ceramic fiber paper sheet, or a foam insulation board is disposed in the groove 541 to form an insulation layer 52; in this step, a plurality of aerogel blankets, ceramic fiber paper sheets, or foam insulation boards may be annularly arranged side by side on the axis of the diffraction frequency body coil on one layer, or a plurality of layers of aerogel blankets, ceramic fiber paper sheets, or foam insulation boards may be stacked in the radial direction to achieve the required thickness of the insulation layer 52.

Through the above steps S101 to S104, the support body 10 having the thermal insulation layer embedded on the inner support layer thereof can be obtained.

After step S104, the outer support layer 56 may be formed by winding glass fiber filaments pre-impregnated with high polymer synthetic resin around the outer surfaces of the inner support layer 54 and the thermal insulation layer 52 embedded therein and then curing the glass fiber filaments at a high temperature.

After step S95 or S104, the formed support body 10 or 50 may be further subjected to cutting, characterization, painting, device formation, etc. to form a rf body coil with enhanced thermal insulation.

Embodiments of the present invention provide better thermal insulation of the rf body coil by providing that the support of the rf body coil comprises at least two layers that are composited together, and one of the layers is made of a thermally insulating material.

Figure 11 is a graph comparing thermal testing of an rf body coil according to an embodiment of the present invention and a conventional rf body coil, wherein the upper curve is a temperature response curve of the conventional rf body coil and the lower curve is a temperature response curve of the rf body coil according to an embodiment of the present invention. During testing, a heating element is arranged on the outer surface of a support body of the radio frequency body coil, current is input into the heating element, and the temperature of the inner surface of the support body of the radio frequency body coil is obtained. As shown in fig. 11, the rf body coil according to the embodiment of the present invention has a better thermal insulation effect than the conventional rf body coil.

Moreover, through practical application experiments, the radio frequency body coil of the embodiment of the invention can still meet the requirement of heat insulation under the condition of simplifying a cooling system, for example, a heat exchanger can be removed from the existing cooling system, and even the existing cooling system can be removed from some models of magnetic resonance equipment. That is, even if air at ambient temperature is directly admitted between the radio frequency body coil and the gradient coil without prior cooling, the heat concentrated outside the radio frequency body coil can be blocked by its support body, so that the temperature inside the radio frequency body coil is adequate to avoid generating high temperatures that could cause harm to the patient.

Some exemplary embodiments have been described above. Nevertheless, it will be understood that various modifications may be made. For example, suitable results may be achieved if the described techniques are performed in a different order and/or if components in the described systems, architectures, devices, or circuits are combined in a different manner and/or replaced or supplemented by additional components or their equivalents. Accordingly, other embodiments are within the scope of the following claims.

Claims (19)

1. A radio frequency body coil comprises a support body, the support body of the radio frequency body coil comprises a heat insulation layer and at least one support layer, the heat insulation layer and the at least one support layer are compounded together, the materials of the heat insulation layer and the support layer are different, the heat insulation layer is made of heat insulation materials,

wherein the at least one support layer comprises an inner support layer and an outer support layer, the thermal insulation layer being disposed between the inner support layer and the outer support layer.

2. The radio frequency body coil in accordance with claim 1, wherein the material of the thermal insulation layer comprises at least one of aerogel, ceramic fiber paper, or high polymer foam thermal insulation plastic.

3. The radio frequency body coil of claim 1, wherein the material of the at least one support layer comprises glass fiber reinforced plastic.

4. The radio frequency body coil as set forth in claim 1, wherein the outer support layer and the inner support layer are interconnected at both ends of the radio frequency body coil to form two ends, the thermal shield extending from one of the ends to the other end.

5. The radio frequency body coil in accordance with claim 4, wherein the outer support layer and inner support layer are interconnected at a location between the two ends to form a spacer, the thermal insulating layer being disposed between each end and the spacer.

6. The radio frequency body coil in accordance with claim 1, wherein the thermal insulation layer comprises one or more thermal insulation felt layers or thermal insulation sheet layers laid on an outer surface of one support layer, each thermal insulation felt layer or thermal insulation sheet layer comprising one or more thermal insulation felt or thermal insulation sheet layers annularly distributed along the body coil axis.

7. The radio frequency body coil of claim 6, wherein each insulation blanket or sheet has a seam between one end and the other end thereof, adjacent seams being spaced apart.

8. The radio frequency body coil of claim 7, comprising an upper detection bed region and a lower detection bed region interconnected as a hollow cylinder, the lower detection bed region adapted to oppose a back surface of a detection bed, the upper detection bed region adapted to oppose a front surface of a detection bed, the seam disposed in the lower detection bed region.

9. The radio frequency body coil of claim 1, wherein the at least one support layer comprises an inner support layer having a groove in an outer surface thereof, the thermal insulation layer being embedded in the groove.

10. A method of manufacturing a radio frequency body coil comprising the steps of:

forming at least one support layer;

providing a heat insulation layer and compounding the heat insulation layer and the at least one supporting layer together, wherein the materials of the heat insulation layer and the supporting layer are different, the heat insulation layer is made of heat insulation materials,

wherein "forming at least one support layer" comprises: forming an inner support layer on the mandrel;

providing and compounding an insulating layer with the at least one support layer comprises: and the heat insulation layer is fixed on the inner support layer.

The "forming at least one support layer" further comprises: forming an outer support layer overlying the inner support layer and an outer surface of the insulation layer thereon.

11. The method of claim 10, wherein the material of the thermal insulation layer comprises at least one of aerogel, ceramic fiber paper, or high polymer foam thermal insulation plastic.

12. The method of claim 10, wherein forming at least one support layer comprises:

winding and molding the glass fiber presoaked with the high-polymerization synthetic resin;

and curing the wound glass fiber yarns at high temperature to form a support layer.

13. The method of manufacturing a radio frequency body coil as set forth in claim 10, wherein: "fixing the thermal insulation layer on the inner support layer" includes: and the heat insulation layer is adhered to the inner support layer.

14. The method of claim 10, wherein securing the thermal insulation layer on the inner support layer comprises: extending the thermal insulation layer from one to the other of two ends of the radio frequency body coil, the two ends being located at two ends of the radio frequency body coil, respectively; "an outer support layer forming an outer surface of an insulation layer overlying the inner support layer" includes: connecting the outer support layer at both ends of the radio frequency body coil to form the two ends such that a thermal insulation layer is located between the two ends.

15. The method of claim 14, wherein securing the thermal insulation layer on the inner support layer further comprises: at least two heat insulation layers which are mutually spaced along the axial direction of the radio frequency body coil are annularly fixed on the inner supporting layer; the "outer support layer forming an outer surface of the insulation layer covering the inner support layer and the insulation layer thereon" further includes: connecting the outer support layers at a spacing between each adjacent insulation layer to form a spacer.

16. The method of manufacturing a radio frequency body coil of claim 10, wherein providing a thermal insulation layer and compounding the thermal insulation layer with the at least one support layer comprises: one or more felt or sheet layers are laminated to a support layer.

17. The method of claim 16, wherein at least one of the one or more felt or sheet layers is joined at one end to another end to form a seam, and wherein adjacent seams are spaced apart.

18. The method of claim 17, wherein the rf body coil includes an upper detection bed region and a lower detection bed region connected to each other as a hollow cylinder, the lower detection bed region being adapted to oppose a back surface of the detection bed, the upper detection bed region being adapted to oppose a front surface of the detection bed, the seam being disposed in the lower detection bed region.

19. The method of manufacturing a radio frequency body coil in accordance with claim 10,

the "forming at least one support layer" further comprises: forming an inner supporting layer on a mandrel, and arranging a groove on the outer surface of the inner supporting layer;

providing and compounding an insulating layer with the at least one support layer comprises: and a heat insulation layer is embedded in the groove.

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