CN206675527U - RF body coil and magnetic resonance imaging system - Google Patents

Abstract

The utility model provides a radio frequency body coil and a magnetic resonance imaging system with the same. The radio frequency body coil includes a support body and a printed circuit board. The support body is hollow and has an annular outer surface. The printed circuit board is disposed on the outer surface of the support body, and includes a first conductive layer and a second conductive layer and a third conductive layer oppositely disposed above the first conductive layer. Wherein, the first conductive layer includes a plurality of first conductive strips arranged at intervals, and each first conductive strip includes a first end, a second end, and an intermediate portion between the first end and the second end. Part; the second conductive layer includes a plurality of second conductive strips arranged separately, and the third conductive layer includes a plurality of third conductive strips arranged separately. Every two adjacent first ends of the first conductive layer and a second conductive strip form a first capacitor module, and every adjacent two second ends of the first conductive layer and a third conductive strip form a first capacitor module. Two capacitor modules.

Description

Radio Frequency Body Coil and Magnetic Resonance Imaging System

technical field

The utility model relates to the field of medical imaging, in particular to a radio frequency body coil and a magnetic resonance imaging system with the same.

Background technique

In a magnetic resonance (Magnetic Resonance, MR) imaging system, the radio frequency body coil is usually configured to transmit radio frequency pulses of a certain frequency and power to resonate the hydrogen protons in the subject, and can receive The magnetic resonance signal generated by hydrogen protons in the subject is used for image reconstruction of the detected part of the subject.

The birdcage coil is a kind of radio frequency body coil widely used at present. The birdcage coil includes a hollow cylinder, the two ends of the outer surface of the hollow cylinder are provided with a plurality of capacitor modules, and the capacitor modules at each end are evenly distributed in a ring shape around the hollow cylinder and connected in turn to form an end ring circuit board. The circular circuit boards at the two ends of the cylinder are parallel to each other. A plurality of conductive horizontal bars are arranged at intervals between the two end ring circuit boards on the hollow cylinder, and the two ends of each conductive horizontal bar are respectively used to connect a capacitor module on the two end ring circuit boards.

The capacitor module on the ring-shaped circuit board at the end may be an integrated capacitor device welded on the ring-shaped support, such as a ceramic capacitor device. In the welding process, in order to avoid electric arc and ensure the quality, it needs to spend a lot of cost.

As an alternative, the capacitor module on the above-mentioned end ring circuit board can also be a distributed capacitor, wherein the capacitor module is made on a printed circuit board, which can include two oppositely arranged conductive layers, one of which is conductive One layer includes a plurality of first conductive strips, and the other conductive layer includes a plurality of second conductive strips, wherein each first conductive strip overlaps with two adjacent second conductive strips in the radial direction to form an independent capacitor module. The capacitor module formed on the printed circuit board does not need to be placed on the hollow cylinder through the welding process, but the welding process is still required to realize the electrical connection between it and the conductive horizontal bar, so it is still easy to cause arc generation And has a larger cost.

Therefore, it is necessary to provide a new radio frequency body coil and magnetic resonance imaging system, which can avoid arcs caused by welding, and can simplify the process and reduce costs.

Utility model content

An object of the present invention is to provide a new radio frequency body coil and magnetic resonance imaging system, which can avoid arcs caused by welding, and can simplify the process and reduce the cost.

An exemplary embodiment of the present invention provides a radio frequency body coil, which includes a support body and a printed circuit board. The support body is hollow and has an annular outer surface. The printed circuit board is disposed on the outer surface of the support body, and includes a first conductive layer and a second conductive layer and a third conductive layer oppositely disposed above the first conductive layer. Wherein, the first conductive layer includes a plurality of first conductive strips arranged at intervals, and each first conductive strip includes a first end, a second end, and an intermediate portion between the first end and the second end. Part; the second conductive layer includes a plurality of second conductive strips arranged separately, and the third conductive layer includes a plurality of third conductive strips arranged separately. Every two adjacent first ends of the first conductive layer and a second conductive strip form a first capacitor module, and every adjacent two second ends of the first conductive layer and a third conductive strip form a first capacitor module. Two capacitor modules.

An exemplary embodiment of the present invention provides a magnetic resonance imaging system, including the radio frequency body coil described above.

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

Description of drawings

By describing the exemplary embodiment of the utility model in conjunction with the accompanying drawings, the utility model can be better understood, in the accompanying drawings:

Fig. 1 is a schematic structural diagram of a radio frequency body coil provided by the first embodiment of the present invention;

Fig. 2 and Fig. 3 are sectional views of the printed circuit board in Fig. 1;

Fig. 4 is the schematic diagram that forms the printed circuit board in Fig. 1;

Fig. 5 is a schematic structural diagram of the radio frequency body coil provided by the second embodiment of the present invention;

Fig. 6 shows the positional relationship between the frequency adjustment device and the second conductive strip in Fig. 5;

Fig. 7 shows the positional relationship between the frequency adjustment device and the third conductive strip in Fig. 5;

Fig. 8 is a schematic structural diagram of a radio frequency body coil according to a third embodiment of the present invention, in which the supporting body is not shown;

Fig. 9 is a schematic structural diagram of a radio frequency body coil according to a fourth embodiment of the present invention, where the supporting body is not shown.

detailed description

Specific implementations of the present utility model will be described below, and it should be pointed out that in the specific description process of these implementations, in order to describe briefly and concisely, it is impossible for this specification to describe all the features of the actual implementations in detail. . It should be understood that, in the actual implementation process of any embodiment, just like in the process of any engineering project or design project, in order to achieve the developer's specific goals and to meet system-related or business-related constraints, Often a variety of specific decisions are made, and this can vary from one implementation to another. In addition, it is also understood that although such development efforts may be complex and lengthy, for those of ordinary skill in the art relevant to the disclosure of the present utility model, the disclosure disclosed in this disclosure Some design, manufacturing or production changes based on the technical content are just conventional technical means, and should not be understood as insufficient content of the present disclosure.

Unless otherwise defined, the technical terms or scientific terms used in the claims and the description shall have the ordinary meanings understood by those skilled in the technical field to which the present invention belongs. "First", "second" and similar words used in the utility model patent application specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. "A" or "one" and similar words do not indicate a limitation of number, but mean that there is at least one. Words such as "comprises" or "comprises" and similar terms mean that the elements or items listed before "comprises" or "comprises" include the elements or items listed after "comprises" or "comprises" and their equivalent elements, and do not exclude other components or objects. "Connected" or "connected" and similar terms are not limited to physical or mechanical connections, nor are they limited to direct or indirect connections.

The radio frequency body coil provided by the embodiment of the present invention may be a birdcage coil, or a TEM radio frequency coil. The circuit part of the radio-frequency body coil includes two opposite ring-shaped ends and a plurality of conductive horizontal bars connected between the two ring-shaped ends, and the two ring-shaped ends include a plurality of sequentially connected capacitors module, the plurality of sequentially connected capacitor modules are distributed in a ring shape. Each conductive horizontal strip serves as an inductance module and is connected between two opposite capacitor modules to form a radio frequency resonant circuit.

Fig. 1 is a schematic structural diagram of a radio frequency body coil provided by the first embodiment of the present invention. As shown in FIG. 1 , the radio frequency body coil includes a support body 10 and a printed circuit board 20 . The support body 10 is a hollow structure and has an annular outer surface 101. As shown in FIG. Check the human body. The printed circuit board 20 is arranged on the outer surface 101 of the support body 10 .

FIG. 2 and FIG. 3 are cross-sectional views of the printed circuit board in FIG. 1 . FIG. 4 is a schematic diagram of forming the printed circuit board in FIG. 1 . As shown in Fig. 2, Fig. 3 and Fig. 4, the printed circuit board 20 includes a first conductive layer 210, a second conductive layer 230 and a third conductive layer 250, wherein the second conductive layer 230 and the third conductive layer 250 are opposite to each other. Disposed above the first conductive layer 210, the second conductive layer 230 and the third conductive layer 250 may be disposed on the same plane and may have the same structure and size.

The first conductive layer 210 includes a plurality of first conductive strips arranged separately, and each first conductive strip includes a first end portion 211, a second end portion 213, and a middle portion 215, and the middle portion 215 is located between the first end portion 211 and the second end portion. between the two ends 213 . Wherein each first end portion 211 and each second end portion 213 will serve as a part of a first capacitor module and a second capacitor module respectively, and the middle part 215 is used as an inductance module connected to the capacitor module, that is, the above-mentioned conductive bar.

The second conductive layer 230 includes a plurality of second conductive strips 231 arranged separately, and the third conductive layer 250 includes a plurality of third conductive strips 251 arranged separately, wherein each second conductive strip 231 and each third conductive strip 251 Will serve as another part of the first capacitive module and the second capacitive module respectively.

Specifically, every two adjacent first end portions 211 and a corresponding second conductive strip 231 form a first capacitor module 30, and every adjacent two second end portions 213 form a corresponding third conductive strip 251. A second capacitor module 40 .

Those skilled in the art should understand that, in order to obtain a more ideal radio frequency body coil, the above-mentioned "separation arrangement" is preferably "evenly spaced arrangement", that is, the interval between every two adjacent first conductive strips is equal, and every two adjacent first conductive strips The intervals between two second conductive strips 231 are equal, and the intervals between every two adjacent third conductive strips 251 are equal.

Further, the above-mentioned printed circuit board also includes a support layer 270, which can be used to be arranged between the first conductive layer 210 and the outer surface 101 of the support body 10 to support the printed circuit board 20, and the support layer can be flexible The substrate may also be other materials, such as paper. Moreover, a first insulating layer 220 is provided between the first conductive layer 210 and the second conductive layer 230 , and a second insulating layer 240 is provided between the first conductive layer 210 and the third conductive layer 250 .

Those skilled in the art should understand that the first conductive layer 230 and the first conductive strips thereon, the second conductive layer 230 and the second conductive strips 231 thereon, the third conductive layer 250 and the The third conductive strip 251 and the like can be formed through a corresponding printed circuit board manufacturing process, which can include but not limited to, for example, chemical cleaning, cutting board lamination, exposure, development, etching, film removal, oxidation, board Pressing and other steps.

The above-mentioned first conductive strips, second conductive strips 231 and third conductive strips 251 are all metal strips formed by patterning the printed circuit board, and the metal strips may be copper. Specifically, the first conductive strip may be a metal strip formed on the support layer 270 , and the second conductive strip 231 and the third conductive strip 251 are metal strips formed on the first insulating layer 220 and the second insulating layer 240 respectively. The first conductive layer 210 may be firstly formed on the support layer 270 and patterned to obtain the first conductive strips, and the second conductive layer 230 and the third conductive layer 230 are formed on the second insulating layer 220 and the third insulating layer 240 respectively. The conductive layer 250 is obtained by patterning the second conductive layer 230 and the third conductive layer 250 to obtain the second conductive strips 231 and the third conductive strips 251 . The printed circuit board 20 can be formed by laminating the second insulating layer 220 with the second conductive strips 231 thereon and the third insulating layer 240 with the third conductive strips 251 thereon with the first conductive layer. In this way, the use of soldering processes to form the inductance and capacitance of the RF body coil can be avoided. The above-mentioned formation process/process of the printed circuit board 20 is only an exemplary solution, and those skilled in the art should understand that the printed circuit board 20 with the structural design of the present invention can also be formed by other methods.

The first capacitor module 30 and the second capacitor module 40 can be formed in the following manner: the first ends 211 of the plurality of first conductive strips form a first ring-shaped end, and the second ends of the plurality of first conductive strips 213 forms the second ring-shaped end, the second conductive layer 230 coincides with the first ring-shaped end in the radial direction of the support body 10, and the third conductive layer 250 overlaps with the second ring-shaped end in the radial direction of the support body 10 The shape ends overlap.

Wherein, in each first capacitor module 30, the two ends of the second conductive strip 231 partially coincide with the two first end portions 211 in the radial direction of the support body 10, for example, the width of the second conductive strip 231 It is larger than the width of the gap between the two first end portions 211 , and the center of the second conductive strip 231 is opposite to the center of the gap. In each second capacitor module 40, the two ends of the third conductive strip 251 partially coincide with the two second end portions 213 in the radial direction of the support body 10, for example, the width of the third conductive strip 251 is greater than two The width of the gap between the two second end portions 213, and the center of the second conductive strip 251 is opposite to the center of the gap.

The above-mentioned multiple first capacitive elements 30 , multiple second capacitive elements 40 and corresponding inductive elements may be equivalent to ring-shaped radio frequency coils to transmit radio frequency pulses or receive magnetic resonance signals.

In one embodiment, the dimensions of the first end portion 211 and the second end portion 213 of the first conductive strip, the second conductive strip 231 and the third conductive strip 251 may be the same.

The width of the middle portion 215 of the first conductive strip is smaller than the width of the corresponding first end portion 211 and the second end portion 213, and the length of the middle portion 215 of the first conductive strip is greater than the corresponding first end portion 211 and the second end portion. 213 in length.

The above-mentioned “width” refers to a dimension along the circumferential direction of the support body 10 , and “length” refers to a dimension along the axial direction of the support body 10 .

Optionally, the radio frequency body coil in the embodiment of the present invention may also include a radio frequency feed circuit (not shown in the figure) and a decoupling circuit (not shown in the figure), and the radio frequency feed circuit is configured to be able to connect the multiple One of the first capacitive elements 30. The decoupling circuit is configured to be able to connect one of the plurality of second capacitive elements 40 .

Those skilled in the art should understand that the above-mentioned "radio frequency feed-in circuit" is used to transmit radio frequency signals to the radio frequency body coil to control the radio frequency body coil to emit radio frequency magnetic field pulses, and the above "decoupling circuit" is used as a switch to switch the radio frequency body coil The coil works in transmit mode or receive mode.

In this embodiment, the first insulating layer 220 disposed under the plurality of second conductive strips 231 may be an integral insulating layer formed integrally. The second insulating layer 240 disposed under the plurality of third conductive strips 251 may also be an integral insulating layer formed integrally. Taking the first insulating layer and the second conductive layer as an example, a plurality of second conductive strips 231 can be formed at intervals on a longer insulating layer to form a whole.

Fig. 5 is a structural schematic diagram of the radio frequency body coil provided by the second embodiment of the utility model, Fig. 6 shows the positional relationship between the frequency adjustment device in Fig. 5 and the second conductive strip, and Fig. 7 shows the The positional relationship between the frequency adjustment device and the third conductive strip. As shown in Fig. 5, Fig. 6 and Fig. 7, the structure and principle of the radio frequency body coil of the second embodiment are similar to those of the first embodiment, the difference is that a frequency adjustment device is arranged above at least one second conductive strip 231 260 , a frequency adjustment device 260 is also provided above the at least one third conductive strip 251 . The frequency adjustment device 260 is used to adjust the radio frequency transmission frequency of the radio frequency body coil. The fine adjustment of the transmission frequency is realized by the frequency adjustment device to achieve the required frequency.

In one embodiment, the frequency adjustment device 260 includes an insulating spacer 261 configured to partially or fully cover the corresponding second conductive strip 231 or third conductive strip 251 . For example, by adjusting the position of the insulating spacer 261, the second conductive strip 231 or the third conductive strip 251 below it can be exposed partly, completely exposed or completely covered, by changing the position of the second conductive strip 231 or the third conductive strip 251 The covered area can change the frequency of the radio frequency signal on the radio frequency body coil. Moreover, the frequency adjustment range of the radio frequency signal can be changed by changing the number of insulating spacers 261 . When the number of insulating spacers 261 is multiple, they may be evenly spaced on the first ring-shaped end portion and the second ring-shaped end portion.

Optionally, as shown in FIG. 5-FIG. 7, the above-mentioned frequency adjustment device may further include a receiving part 263, which is arranged above the corresponding second conductive strip 231 or third conductive strip 251, and the above-mentioned insulating spacer 261 is movable Set in the receiving part 261 so as to be able to be partially or fully inserted into the receiving part 261 , in this way, the position of the insulating spacer 261 is adjusted, and the shaded area of the second conductive strip 231 or the third conductive strip 251 is adjusted.

The receiving part 263 can be bridged on both sides of the second conductive bar 231 or the third conductive bar 251 through pillar bridges, and one end of the receiving part 263 is provided with an opening so that the insulating gasket 261 can be inserted therein.

Fig. 8 is a structural schematic diagram of the radio frequency body coil provided by the third embodiment of the present invention. The structure and principle of the radio frequency body coil of this embodiment are similar to those of the first and second embodiments, the difference lies in the printed circuit board 20, therefore, the figure The support body is not shown in 8.

As shown in FIG. 8 , the difference between the radio frequency body coil and the first and second embodiments is that the first insulating layer 220 and/or the second insulating layer 240 are not integrally formed as a whole, but are A separate insulating layer is provided under the second conductive strips 231, and the separate insulating layers below the adjacent second conductive strips 231 are not connected to each other, and the same is true for the second insulating layer 240, that is:

The first insulating layer 220 includes a plurality of first individual insulating layers 221 arranged separately, and the plurality of second conductive strips 231 are correspondingly arranged on the plurality of individual insulating layers 221 . The second insulating layer 240 includes a plurality of second individual insulating layers 241 arranged at intervals, and a plurality of third conductive strips 251 are correspondingly arranged on the plurality of second individual insulating layers 241 .

By separating the insulating layer, it is not only easy to replace the individual components, but also convenient to adjust the frequency of the radio frequency body coil, and when adjusting the frequency of the radio frequency body coil, it is not necessary to use the Insulation gasket 261. For example, in this embodiment, each first individual insulating layer 221 can be configured to be able to drive the second conductive strip 231 on it to move along the surface of the first conductive layer 210 within a preset range, and each second individual The insulating layer 241 can be configured to drive the third conductive strip 251 thereon to move along the surface of the first conductive layer 210 within a preset range. Therefore, in this embodiment, the position of the corresponding second conductive strip 231 relative to the first end 211 below it can be changed by moving one or more of the first individual insulating layers 221, so as to adjust the corresponding first capacitor module 30 to realize the adjustment of the frequency of the radio frequency body coil; it is also possible to change the position of the corresponding third conductive strip 251 relative to the second end 213 below it by moving one or more of the second separate insulating layers 241 , so as to adjust the capacitance of the corresponding second capacitor module 40 to realize the adjustment of the frequency of the radio frequency body coil.

FIG. 9 is a schematic structural diagram of the radio frequency body coil provided by the fourth embodiment of the present invention, which is similar to FIG. 8 , and the supporting body is not shown. The structure and principle of the radio frequency body coil of this embodiment are similar to those of the first, second, and third embodiments, the difference being:

The first insulating layer 220 may include two parts, one of which is integrally formed as an integral insulating layer, and the other part includes at least one separate insulating layer, and the integral insulating layer in the first insulating layer 220 is provided with a plurality of second conductive strips 231 , each individual insulating layer in the first insulating layer is provided with a corresponding second conductive strip 231 . The second insulating layer 240 may also include two parts, one of which is integrally formed as an integral insulating layer, and the other part includes at least one separate insulating layer, and a plurality of third conductive strips are arranged on the integral insulating layer in the second insulating layer 240 251 , each individual insulating layer in the second insulating layer 240 is provided with a corresponding third conductive strip 251 .

Each individual insulating layer in the first insulating layer 220 is configured to be able to drive the second conductive strip 231 thereon to move along the surface of the first conductive layer 210 within a preset range, and each individual insulating layer 240 in the second insulating layer 240 The insulating layer is configured to drive the third conductive strip 251 thereon to move along the surface of the first conductive layer 210 within a preset range.

The radio frequency body coil of this embodiment is also convenient to adjust the frequency. Compared with the third embodiment, it can fix the integrally formed part, and only set it as a separate structure for the part that needs to be adjusted, so that it can drive the The conductive strip moves.

Another embodiment of the present invention provides a magnetic resonance imaging system, which may include the radio frequency body coil in any of the above embodiments. Those skilled in the art should understand that the magnetic resonance imaging system may also include a main magnet coil and a gradient coil. When the subject's body is placed in the hole of the radio frequency body coil by the moving bed, the main magnet coil generates a static magnetic field passing through the hole, and the gradient coil generates a gradient magnetic field superimposed on the static magnetic field. In the transmission mode, a radio frequency excitation signal of a specific frequency is transmitted to spin the protons in the human body and generate a magnetic resonance signal, and the radio frequency body coil can also be used to receive the magnetic resonance signal when switched to the reception mode.

The magnetic resonance imaging system may further include surface coils, which may also be used to receive the magnetic resonance signals.

The magnetic resonance imaging system may further include a controller, which may be used to control the working state of the main magnet coil, the gradient coil, the radio frequency body coil and/or the surface coil. The controller can also be used to perform signal processing on the magnetic resonance signal to generate a magnetic resonance image of the human body.

In the radio frequency body coil and the magnetic resonance imaging system provided by the embodiments of the present invention, a plurality of first conductive strips are formed on the first conductive layer to respectively form a part of the capacitor module and the inductance module, and through the second A plurality of second conductive strips and third conductive strips are formed on the conductive layer and the third conductive layer to form another part of the capacitor module, which avoids direct welding of capacitor components or connecting inductors and capacitors by welding, simplifies the process, reduces The cost is reduced, and arc generation can be effectively avoided, thereby improving the reliability of the radio frequency body coil.

Some exemplary embodiments have been described above. However, it should be understood that various modifications may be made. For example, if the described techniques are performed in a different order and/or if components of the described system, architecture, device, or circuit are combined in a different manner and/or are replaced or supplemented by additional components or their equivalents, then Suitable results can be achieved. Correspondingly, other implementations also fall within the protection scope of the claims.

Claims (16)

1. A kind of 1. RF body coil, it is characterised in that including：

   Supporter, the supporter are hollow structure and have the outer surface of annular；And

   Printed circuit board (PCB), it is arranged on the outer surface of the supporter, the printed circuit board (PCB) include the first conductive layer and The second conductive layer and the 3rd conductive layer being oppositely disposed above the first conductive layer；

   Wherein, first conductive layer includes multiple the first conductive bars for separating and setting, and each first conductive bar includes first end Portion, the second end and the center section between the first end and the second end；Second conductive layer includes more Individual to separate the second conductive bar set, the 3rd conductive layer includes multiple the 3rd conductive bars for separating and setting；Described first leads Every two neighboring first end of electric layer and second conductive bar form first capacitance module, and described first is conductive Every two neighboring the second end of layer and the 3rd conductive bar form second capacitance module.
2. 2. RF body coil according to claim 1, it is characterised in that the printed circuit board (PCB) also includes supporting layer, institute State supporting layer to be arranged between first conductive layer and the outer surface of the supporter, first conductive layer and the second conduction The first insulating barrier is provided between layer, the second insulating barrier is provided between first conductive layer and the 3rd conductive layer.
3. 3. RF body coil according to claim 2, it is characterised in that first conductive bar is to be formed on supporting layer Bonding jumper.
4. 4. RF body coil according to claim 2, it is characterised in that the second conductive bar and the 3rd the conductive bar difference For the bonding jumper formed on first insulating barrier and the second insulating barrier.
5. 5. RF body coil according to claim 1, it is characterised in that the first end shape of the multiple first conductive bar Into the first annular end, the second end of the multiple first conductive bar forms the second annular end, and second conductive layer exists The supporter overlaps with first annular end in the radial direction, radial direction of the 3rd conductive layer in the supporter Overlapped on direction with second annular end；Wherein, in each first capacitance module, the both ends point of second conductive bar Not being partially overlapped in the radial direction with two first ends in the supporter, in each second capacitance module, described The both ends of three conductive bars being partially overlapped in the radial direction with two the second ends in the supporter respectively.
6. 6. RF body coil according to claim 1, it is characterised in that the width of the center section of first conductive bar It is big less than the first end of first conductive bar and the width of the second end, the length of the center section of first conductive bar In the first end of first conductive bar and the length of the second end.
7. 7. RF body coil according to claim 1, it is characterised in that the first end and second of first conductive bar End, the second conductive bar, the size all same of the 3rd conductive bar.
8. 8. according to the RF body coil described in claim any one of 1-7, it is characterised in that it is conductive to be arranged on the multiple second The integral insulation layer that the first insulating barrier below bar is formed in one, be arranged on below the multiple 3rd conductive bar The integral insulation layer that two insulating barriers are formed in one.
9. 9. RF body coil according to claim 8, it is characterised in that the top of at least one second conductive bar is provided with frequency Rate adjusting means, the top of at least one 3rd conductive bar are provided with frequency regulation arrangement, and the frequency regulation arrangement is used to adjust The radio-frequency transmissions frequency of the RF body coil.
10. 10. RF body coil according to claim 9, it is characterised in that the frequency regulation arrangement includes insulation spacer, The insulation spacer is configured to partly or entirely block corresponding second conductive bar or the 3rd conductive bar.
11. 11. RF body coil according to claim 10, it is characterised in that the frequency regulation arrangement also includes accommodating Part, the receiving member are arranged on the top of corresponding second conductive bar or the 3rd conductive bar, and the insulation spacer is actively set In the receiving member, can partly or entirely insert in the receiving member.
12. 12. according to the RF body coil described in claim any one of 1-7, it is characterised in that first insulating barrier includes dividing Every the multiple first independent insulating barriers of setting, the multiple second conductive bar is arranged in correspondence with the multiple independent insulating barrier On；Second insulating barrier includes separating the multiple second independent insulating barriers set, and the multiple 3rd conductive bar is accordingly set Put on the multiple second independent insulating barrier.
13. 13. RF body coil according to claim 12, it is characterised in that each first independent insulating barrier is configured to It is enough to drive surface of second conductive bar along first conductive layer thereon movable within a preset range, each second individually insulation Layer is configured to drive surface of the 3rd conductive bar along first conductive layer thereon movable within a preset range.
14. 14. according to the RF body coil described in claim any one of 1-7, it is characterised in that first insulating barrier includes two Part, the integral insulation layer that a portion is formed in one, another part includes at least one independent insulating barrier, described Integral insulation layer in first insulating barrier is provided with multiple second conductive bars, each independent insulating barrier in first insulating barrier It is provided with the second conductive bar corresponding to one；Second insulating barrier includes two parts, a portion be formed in one one Individual integral insulation layer, another part include at least one independent insulating barrier, are set on the integral insulation layer in second insulating barrier There are multiple 3rd conductive bars, each individually insulating barrier in second insulating barrier is provided with the 3rd conductive bar corresponding to one.
15. 15. RF body coil according to claim 14, it is characterised in that each individually exhausted in first insulating barrier Edge layer is configured to drive surface of second conductive bar along first conductive layer thereon movable within a preset range, institute The each individually insulating barrier stated in the second insulating barrier is configured to drive the 3rd conductive bar thereon conductive along described first The surface of layer is movable within a preset range.
16. 16. a kind of magnetic resonance imaging system, it is characterised in that including the RF body coil described in claim any one of 1-15.