CN111443317B - Wireless local coil of magnetic resonance imaging system and magnetic resonance imaging system - Google Patents
Wireless local coil of magnetic resonance imaging system and magnetic resonance imaging system Download PDFInfo
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- CN111443317B CN111443317B CN201910044554.4A CN201910044554A CN111443317B CN 111443317 B CN111443317 B CN 111443317B CN 201910044554 A CN201910044554 A CN 201910044554A CN 111443317 B CN111443317 B CN 111443317B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/34—Constructional details, e.g. resonators, specially adapted to MR
- G01R33/34015—Temperature-controlled RF coils
- G01R33/3403—Means for cooling of the RF coils, e.g. a refrigerator or a cooling vessel specially adapted for housing an RF coil
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/05—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves
- A61B5/055—Detecting, measuring or recording for diagnosis by means of electric currents or magnetic fields; Measuring using microwaves or radio waves involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/20—Arrangements or instruments for measuring magnetic variables involving magnetic resonance
- G01R33/28—Details of apparatus provided for in groups G01R33/44 - G01R33/64
- G01R33/32—Excitation or detection systems, e.g. using radio frequency signals
- G01R33/36—Electrical details, e.g. matching or coupling of the coil to the receiver
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Abstract
A wireless local coil for a magnetic resonance imaging system comprises a body (10), an antenna (20) and a functional assembly (30). The body has a first side (11) and a second side (12). The antenna is disposed between the first side portion and the second side portion. The functional assembly comprises a shell (31), a circuit board (32), a module group (33) and a first cooling piece (34). One end of the shell in the height direction is connected with the second side part, and the other end of the shell in the height direction is far away from the first side part. The housing forms a receptacle (313). The circuit board is arranged in the cavity. The circuit board is perpendicular to the height direction and is connected with the antenna. The module group is arranged on the side face, back to the first side portion, of the circuit board, can control and process magnetic resonance signals from the antenna, and wirelessly transmits the magnetic resonance signals to a receiving unit of the magnetic resonance imaging system. The first cooling part contains phase-change material and can contact with the module group for heat conduction. The wireless local coil has small temperature fluctuation in the working process and higher use comfort.
Description
Technical Field
The invention relates to a wireless local coil of a magnetic resonance imaging system, in particular to a wireless local coil with high use comfort and a magnetic resonance imaging system comprising the same.
Background
A local coil is one of the core components of a Magnetic Resonance Imaging (MRI) system, which is capable of receiving magnetic resonance signals of a subject. The wireless local coil generates heat during operation, and the generated heat is easy to cause discomfort of the examinee because the wireless local coil is tightly attached to the examinee.
Disclosure of Invention
It is an object of the invention to provide a wireless local coil for a magnetic resonance imaging system which is comfortable to use.
It is a further object of the invention to provide a magnetic resonance imaging system with a wireless local coil that is comfortable to use.
The invention provides a wireless local coil of a magnetic resonance imaging system, which comprises a main body, an antenna and a functional component. The main body has a first side portion for facing toward the object to be examined and a second side portion for facing away from the object to be examined. The antenna is arranged in the main body and is positioned between the first side part and the second side part. The antenna is capable of receiving magnetic resonance signals. The functional assembly comprises a shell, a circuit board, a module group and a first cooling part. One end of the shell in the height direction is connected with the second side part, and the other end of the shell in the height direction is far away from the first side part. The housing defines a cavity. The circuit board is arranged in the containing cavity and connected with the shell. The circuit board is arranged perpendicular to the height direction and is electrically connected with the antenna. The module group is arranged on the side face, back to the first side portion, of the circuit board, can control and process magnetic resonance signals from the antenna, and wirelessly transmits the magnetic resonance signals to a receiving unit of the magnetic resonance imaging system. The first cooling piece is arranged in the accommodating cavity. The first cooling piece is arranged on one side of the circuit board, which is provided with the module group, and can be in contact with the module group for heat conduction. The first cooling member includes a phase change material.
When the wireless local coil is operated, the module group generates heat. The phase-change material in the first cooling part has very high latent heat, and the heat that the module group produced can make phase-change material temperature rise to reach phase-change temperature and produce the phase transition through contact heat conduction, and phase-change material absorbs the heat in a large number while maintaining at phase-change temperature in the phase transition process. When the wireless local coil does not work, the heat stored in the phase change material is slowly released. Temperature fluctuations of the wireless local coil during operation can thereby be reduced. In addition, module group and first cooling piece all set up in the one side that the first lateral part was kept away from to the circuit board, and the heat that module group produced is released the surrounding environment space to keeping away from the direction of examinee preferentially, improves examinee's comfort level by this.
In another exemplary embodiment of the wireless local coil, the first temperature reducing member comprises a first thermally conductive shell. The first thermally conductive shell is formed with a first thermal storage cavity for containing a phase change material. This first cooling piece simple structure, easily processing.
In yet another exemplary embodiment of the wireless local coil, the first heat storage cavity formed by the first heat conducting shell is a sealed cavity, and the outer wall of the first heat conducting shell can contact with the module group for heat conduction. This first cooling piece easily wholly processes, and can avoid phase change material to reveal.
In a further exemplary embodiment of the wireless local coil, the end of the first thermally conductive shell facing the circuit board has an opening communicating with the first heat storage chamber. The circuit board is connected with the first heat conduction shell to close the opening. The module group is arranged in the first heat storage cavity and directly contacts the phase change material in the first heat storage cavity. The thermal conductivity can be improved by direct contact.
In a further exemplary embodiment of the wireless local coil, the outer wall of the first heat conducting shell facing away from the circuit board in the height direction can be in contact with the inner wall of the housing for heat conduction. Therefore, the heat dissipation efficiency of the first heat conduction shell towards the direction back to the first side part can be improved.
In a further exemplary embodiment of the wireless local coil, the first heat conducting shell is formed with a plurality of heat dissipating fins protruding in the height direction away from the outer wall of the circuit board. Each of the heat dissipating fins extends in the height direction. Therefore, the heat dissipation efficiency of the first heat conduction shell towards the direction back to the first side part can be improved.
In a further exemplary embodiment of the wireless local coil, the wireless local coil further comprises a thermal insulation. The heat insulator is disposed between the circuit board and the first side portion in the height direction. Thereby, the heat diffusion from the module group to the first side portion can be reduced.
In a further exemplary embodiment of the wireless local coil, the wireless local coil further comprises a second cooling member. The second cooling member is disposed between the heat insulating member and the circuit board in the height direction. The second cooling part is provided with a sealed cavity and contains a phase-change material contained in the sealed cavity. To further reduce temperature fluctuations of the wireless local coil during operation.
In a further exemplary embodiment of the wireless local coil, the housing forms a second heat accumulation chamber outside the receiving chamber. The shell is provided with a phase-change material in the second heat storage cavity. To further reduce temperature fluctuations of the wireless local coil during operation.
In yet another exemplary embodiment of the wireless local coil, the phase change material is mixed with aluminum nitride powder, aluminum oxide powder and/or carbon powder. To improve thermal conductivity.
In yet another exemplary embodiment of the wireless local coil, the phase change material is present in the form of an adsorption to a thermally conductive porous ceramic, an adsorption to expanded graphite, or an adsorption to foamed aluminum. To improve thermal conductivity.
In a further exemplary embodiment of the wireless local coil, the wireless local coil further comprises a back plane. The bottom plate is arranged on one side of the shell in the height direction and can clamp the main body with the shell. Thereby facilitating assembly of the wireless local coil and improving structural stability.
In a further exemplary embodiment of the wireless local coil, the body is provided flexible. By this can more laminate person's the body surface of being examined when using, improve detection effect and comfort level.
In yet another exemplary embodiment of the wireless local coil, the circuit board is a flexible circuit board and is integrally formed with the antenna. Therefore, the structure can be simplified, and the processing is convenient.
The invention also provides a magnetic resonance imaging system comprising a wireless local coil as described above and a receiving unit. The receiving unit is capable of receiving magnetic resonance signals transmitted by the wireless local coil. The wireless local coil of the magnetic resonance imaging system has small temperature fluctuation in the working process and high use comfort.
Drawings
The following drawings are only schematic illustrations and explanations of the present invention, and do not limit the scope of the present invention.
Fig. 1 is a schematic structural diagram of an exemplary embodiment of a wireless local coil of a magnetic resonance imaging system.
Fig. 2 is a sectional view taken along line ii-ii in fig. 1.
Fig. 3 is an enlarged view of the portion iii in fig. 2.
Fig. 4 is a schematic diagram of another exemplary embodiment of a wireless local coil.
Fig. 5 is a schematic diagram of a further exemplary embodiment of a wireless local coil.
Fig. 6 is a schematic diagram of yet another illustrative embodiment of a wireless local coil.
Description of the reference symbols
10 main body
11 first side part
12 second side part
20 aerial
30 functional assembly
31 shell
313 accommodating cavity
315 second heat accumulation cavity
32 circuit board
33 Module group
34 first cooling member
341 first heat conducting shell
343 first heat accumulation chamber
345 opening (345)
347 heat dissipation fin
35 Heat conducting member
40 Heat insulation
50 second cooling part
60 backplane
80 target under examination
H height direction
Detailed Description
In order to more clearly understand the technical features, objects and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings, in which the same reference numerals indicate the same or structurally similar but functionally identical elements.
"exemplary" means "serving as an example, instance, or illustration" herein, and any illustration, embodiment, or steps described as "exemplary" herein should not be construed as a preferred or advantageous alternative.
In this document, "first", "second", etc. do not mean their importance or order, etc., but merely mean that they are distinguished from each other so as to facilitate the description of the document.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, for simplicity and clarity of understanding, only one of the components having the same structure or function is schematically illustrated or labeled in some of the drawings.
Fig. 1 is a schematic structural diagram of an exemplary embodiment of a wireless local coil of a magnetic resonance imaging system. Fig. 2 is a sectional view taken along line ii-ii in fig. 1. As shown in fig. 1 and 2, the wireless local coil of the magnetic resonance imaging system includes a main body 10, an antenna 20, and a functional component 30.
As shown in fig. 2, the main body 10 has a first side 11 for facing toward an object 80 to be examined (e.g., a human body shown in fig. 2) and a second side 12 for facing away from the object 80 to be examined. The antenna 20 is disposed in the main body 10 between the first side portion 11 and the second side portion 12. The main body 10 mainly serves as a support protection and insulation of the antenna 20. The antenna 20 is capable of receiving magnetic resonance signals.
Fig. 3 is an enlarged view of the portion iii in fig. 2. As shown in fig. 3, the functional module 30 includes a housing 31, a circuit board 32, a module group 33, and a first cooling member 34. One end of the housing 31 in the height direction H is connected to the second side portion 12, and the other end thereof in the height direction H is disposed away from the first side portion 11. Housing 31 defines a receptacle 313. The circuit board 32 is disposed in the cavity 313 and connected to the housing 31. The circuit board 32 is disposed perpendicular to the height direction H and electrically connected to the antenna 20.
The module set 33 is disposed on a side of the circuit board 32 opposite to the first side portion 11, and is capable of controlling and processing the magnetic resonance signal from the antenna 20, and wirelessly transmitting the magnetic resonance signal to a receiving unit of the magnetic resonance imaging system. The module group 33 includes, for example, a power conversion module, a power amplifier module, a communication module, a detuning circuit-related module, and a control module.
The first cooling member 34 is disposed in the accommodating cavity 313. The first cooling member 34 is disposed on a side of the circuit board 32 where the module group 33 is disposed and can contact the module group 33 for heat conduction. The first cooling member 34 may be configured to conduct heat in contact with one module of the module group 33, or may be configured to conduct heat in contact with a plurality of modules of the module group 33. The first temperature reducing member 34 contains a phase change material. In the exemplary embodiment, the phase change material contained in the first cooling member 34 is paraffin, and the phase change temperature thereof is 40 degrees. Without limitation, in other exemplary embodiments, the phase change material may be other solid-liquid phase change materials, and the phase change temperature may be selected according to comfort requirements of the subject, etc.
When the wireless local coil is operating, the module set 33 generates heat. The phase change material in the first cooling member 34 has high latent heat, and the heat generated by the module group 33 will raise the temperature of the phase change material to the phase change temperature through contact heat conduction and generate phase change, and the phase change material will maintain at the phase change temperature while absorbing a large amount of heat during the phase change process. When the wireless local coil does not work, the heat stored in the phase change material is slowly released, and the heat is convectively transferred to the shell 31 through the air in the cavity 313 and then is diffused to the surrounding space. Temperature fluctuations of the wireless local coil during operation can thereby be reduced. In addition, the module group 33 and the first cooling member 34 are both disposed on a side of the circuit board 32 away from the first side portion 11, and heat generated by the module group 33 is preferentially released to the surrounding environment space in a direction away from the subject, thereby improving comfort of the subject.
In the present exemplary embodiment, the wireless local coil is provided with only one antenna 20 and one functional component 30, but is not limited thereto, and in other exemplary embodiments, the shapes and the number of the antennas 20 and the functional components 30 may be adjusted as needed.
In the present exemplary embodiment, only one circuit board 32, one module group 33, and one first cooling member 34 are provided in the functional assembly 30, but not limited thereto, and in other exemplary embodiments, the number of the circuit board 32, the module group 33, and the first cooling member 34 may be adjusted as needed.
In the present exemplary embodiment, the first temperature reducing member 34 includes one first heat conductive shell 341. The first heat conductive case 341 is formed with a first heat storage chamber 343 for accommodating a phase change material. As shown in fig. 3, the outer wall of the first heat conducting shell 341 can contact and conduct heat with the module set 33, and the contact and conduction heat may be direct contact and conduction heat, or indirect contact and conduction heat through a third party (e.g., heat conducting glue, heat conducting pad, heat conducting ceramic sheet, heat conducting metal body, etc.). The material of the first heat conductive case 341 is preferably a material having good heat conductivity, such as aluminum, copper, or the like. In the present exemplary embodiment, the first heat storage cavity 343 formed by the first heat conductive shell 341 is a sealed cavity to prevent the phase change material from leaking. The first temperature reducing member 34 is easy to machine and assemble.
In an exemplary embodiment, the phase change material is mixed with a filler such as aluminum nitride powder, alumina powder and/or carbon powder, whereby thermal conductivity can be improved; among them, aluminum nitride powder and alumina powder are preferred, and the insulating property is better. Without limitation, in other exemplary embodiments, the phase change material may also be adsorbed to the heat conducting porous ceramic, the expanded graphite, or the aluminum foam, that is, the heat conducting porous ceramic, the expanded graphite, or the aluminum foam is in the first heat storage chamber 343, and the phase change material is adsorbed to the heat conducting porous ceramic, the expanded graphite, or the aluminum foam, which may also increase the heat conductivity; among them, the heat-conducting porous ceramic is preferable, and the insulating property is better.
In the present exemplary embodiment, the main body 10 is provided to be flexible. By this can more laminate person's the body surface of being examined when using, improve the effect and the comfort level that detect. Without limitation, in other exemplary embodiments, the body 10 may also be provided in rigid and other shapes.
In the present exemplary embodiment, the circuit board 32 is a rigid circuit board, which has good stability. But not limited thereto, in other exemplary embodiments, the circuit board 32 may also be a flexible circuit board and integrally formed with the antenna 20, thereby simplifying the structure and facilitating the processing.
Fig. 4 is a schematic diagram of another exemplary embodiment of a wireless local coil. The wireless local coil of the exemplary embodiment is not repeated herein, except for the following points, which are the same as or similar to the wireless local coil shown in fig. 3: the first heat conductive case 341 has an opening 345 communicating with the first heat accumulation chamber 343 at an end toward the circuit board 32. The circuit board 32 is connected to the first heat conductive case 341 to close the opening 345. The module group 33 is disposed in the first heat storage cavity 343 and directly contacts the phase change material in the first heat storage cavity 343. The thermal conductivity can be improved by direct contact.
In the present exemplary embodiment, the first heat conductive shell 341 is formed with a plurality of heat dissipation fins 347 protruding in the height direction H away from the outer wall of the circuit board 32. Each of the heat dissipating fins 347 extends in the height direction H. Thereby, the heat dissipation efficiency of the first heat conductive shell 341 toward the direction back to the first side portion 11 can be improved.
Fig. 5 is a schematic diagram of a further exemplary embodiment of a wireless local coil. The wireless local coil of the exemplary embodiment is not repeated herein, except for the following points, which are the same as or similar to the wireless local coil shown in fig. 3: the outer wall of the first heat conducting shell 341 facing away from the circuit board 32 in the height direction H can contact the inner wall of the housing 31 for heat conduction, and the contact heat conduction may be direct contact heat conduction or indirect contact heat conduction through a third party (e.g., a heat conducting adhesive, a heat conducting pad, a heat conducting ceramic sheet, a heat conducting metal body, etc.). In the present exemplary embodiment, indirect contact heat conduction is achieved by the heat conducting element 35. Thereby, the heat dissipation efficiency of the first heat conductive shell 341 toward the direction back to the first side portion 11 can be improved.
In the illustrated embodiment, the wireless local coil also includes a thermal shield 40. The heat insulator 40 is disposed between the circuit board 32 and the first side portion 11 in the height direction H. This reduces the heat dissipation from the module group 33 to the first side 11.
In the illustrated embodiment, the wireless local coil also includes a second temperature sink 50. The second temperature lowering member 50 is disposed between the heat insulating member 40 and the circuit board 32 in the height direction H. The second cooling member 50 is formed with a sealed cavity, and the second cooling member 50 contains a phase change material contained in the sealed cavity. The heat storage principle of the phase change material is as described above, and is not described in detail herein. The phase transition temperature of the phase change material is set to 30 degrees, for example, which is close to the body surface temperature, so that the comfort of the examinee can be further improved, and the temperature fluctuation of the wireless local coil during the working process can be further reduced.
In the present exemplary embodiment, the housing 31 is formed with a second heat accumulation chamber 315 outside the receiving chamber 313. The case 31 is provided with a phase change material inside the second heat storage chamber 315. The heat storage principle of the phase change material is as described above, and is not described in detail herein. The heat storage capacity of the housing 31 can be further improved, and the temperature fluctuation of the wireless local coil during operation can be further reduced.
Fig. 6 is a schematic diagram of yet another illustrative embodiment of a wireless local coil. The wireless local coil of the exemplary embodiment is not repeated herein, except for the following points, which are the same as or similar to the wireless local coil shown in fig. 3: the wireless local coil also includes a back plane 60. The bottom plate 60 is provided on one side of the housing 31 in the height direction H, and can sandwich the main body 10 with the housing 31. Thereby facilitating assembly of the wireless local coil and improving structural stability.
In an exemplary embodiment, the phase change material may be a solid-solid phase change material, a solid-liquid phase change material, a solid-gas phase change material, a gas-liquid phase change material, an inorganic phase change material, an organic phase change material, or a composite phase change material. The organic phase-change material can be paraffin, carbohydrate and lipid, and the inorganic phase-change material is generally a hydrated salt material. Preferably solid-liquid phase change material, which may be an organic phase change material, such as paraffin (n-eicosane-C)20H42The phase transition temperature is 37 ℃), or inorganic phase transition materials (such as CaCl hexahydrate2·H2O, phase transition temperature of 29 ℃, sodium acetate trihydrate NaCO2CH3·3H2O, the phase transition temperature is 58 ℃).
The invention also provides a magnetic resonance imaging system which, in an exemplary embodiment, comprises a wireless local coil as shown in figure 1 and a receiving unit. The receiving unit is capable of receiving magnetic resonance signals transmitted by the wireless local coil. The wireless local coil of the magnetic resonance imaging system has small temperature fluctuation in the working process and high use comfort.
In other exemplary embodiments, the wireless local coil may also be the wireless local coil shown in any of fig. 4-6.
In order to more clearly understand the technical features, objects and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings, in which the same reference numerals indicate the same or structurally similar but functionally identical elements.
"exemplary" means "serving as an example, instance, or illustration" herein, and any illustration, embodiment, or steps described as "exemplary" herein should not be construed as a preferred or advantageous alternative.
It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications such as combinations, divisions or repetitions of features, which do not depart from the technical spirit of the present invention, should be included in the scope of the present invention.
Claims (15)
1. A wireless local coil for a magnetic resonance imaging system, comprising:
a body (10) having a first side (11) for facing towards the object to be examined and a second side (12) for facing away from the object to be examined;
an antenna (20) disposed within the body (10) between the first side portion (11) and the second side portion (12), the antenna (20) being capable of receiving magnetic resonance signals; and
a functional assembly (30) comprising:
a housing (31) having one end in the height direction connected to the second side portion (12) and the other end in the height direction arranged away from the first side portion (11), the housing (31) forming a receiving chamber (313),
a circuit board (32) arranged in the accommodating cavity (313) and connected with the shell (31), wherein the circuit board (32) is arranged perpendicular to the height direction and electrically connected with the antenna (20),
one module group (33) which is arranged on the side face, back to the first side portion (11), of the circuit board (32) and can control and process the magnetic resonance signal from the antenna (20) and wirelessly send the magnetic resonance signal to a receiving unit of a magnetic resonance imaging system, and one first cooling part (34) which is arranged in the accommodating cavity (313), wherein the first cooling part (34) is arranged on one side of the module group (33) arranged on the circuit board (32) and can be in contact with the module group (33) for heat conduction, and the first cooling part (34) comprises a phase change material.
2. A wireless local coil according to claim 1 wherein said first temperature reducing member (34) comprises a first thermally conductive shell (341), said first thermally conductive shell (341) defining a first thermal storage chamber (343) for receiving a phase change material.
3. The wireless local coil according to claim 2, wherein the first thermal storage cavity (343) formed by the first thermal conductive shell (341) is a sealed cavity, and an outer wall of the first thermal conductive shell (341) is in thermal contact with the module set (33).
4. The wireless local coil of claim 2 wherein an end of the first thermally conductive shell (341) facing the circuit board (32) has an opening (345) communicating with the first thermally conductive cavity (343), the circuit board (32) is connected to the first thermally conductive shell (341) to close the opening (345), and the module assembly (33) is disposed in the first thermally conductive cavity (343) and directly contacts the phase change material in the first thermally conductive cavity (343).
5. A wireless local coil according to claim 2, wherein the outer wall of the first heat conducting shell (341) facing away from the circuit board (32) in the height direction is thermally conductive in contact with the inner wall of the housing (31).
6. The wireless local coil according to claim 2, wherein said first heat conductive case (341) is formed with a plurality of heat dissipating fins (347) protruding in the height direction from the outer wall of said circuit board (32), each of said heat dissipating fins (347) extending in the height direction.
7. A wireless local coil according to claim 1 further comprising a thermal insulation (40) disposed between said circuit board (32) and said first side portion (11) in the height direction.
8. A wireless local coil according to claim 7 further comprising a second temperature reducing member (50) disposed between said thermal insulating member (40) and said circuit board (32) in the elevation direction; the second cooling part (50) is provided with a sealed cavity, and the second cooling part (50) contains a phase-change material contained in the sealed cavity.
9. A wireless local coil according to claim 1 wherein said housing (31) defines a second thermal storage chamber (315) outside said receptacle (313), said housing (31) having a phase change material disposed within said second thermal storage chamber (315).
10. The wireless local coil according to claim 1, wherein the phase change material is mixed with aluminum nitride powder, alumina powder and/or carbon powder.
11. The wireless local coil according to claim 1 wherein the phase change material is present in the form of an adsorption to a thermally conductive porous ceramic, an adsorption to expanded graphite, or an adsorption to aluminum foam.
12. A wireless local coil according to claim 1, wherein said wireless local coil further comprises a bottom plate (60), said bottom plate (60) being provided on one side of said case (31) in the height direction and capable of sandwiching said main body (10) with said case (31).
13. A wireless local coil according to claim 1, wherein the body (10) is arranged to be flexible.
14. A wireless local coil according to claim 13 wherein said circuit board (32) is a flexible circuit board and is integrally formed with said antenna (20).
15. A magnetic resonance imaging system, comprising:
a wireless local coil as claimed in any one of claims 1 to 14; and
a receiving unit capable of receiving the magnetic resonance signals transmitted by the wireless local coil.
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| CN201910044554.4A CN111443317B (en) | 2019-01-17 | 2019-01-17 | Wireless local coil of magnetic resonance imaging system and magnetic resonance imaging system |
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| CN114206061A (en) * | 2020-09-18 | 2022-03-18 | 西门子(深圳)磁共振有限公司 | Heat dissipation device of magnetic resonance imaging system and magnetic resonance imaging system |
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