CN113820637A - Radio frequency cable assembly and magnetic resonance imaging system - Google Patents
Radio frequency cable assembly and magnetic resonance imaging system Download PDFInfo
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- CN113820637A CN113820637A CN202111088707.9A CN202111088707A CN113820637A CN 113820637 A CN113820637 A CN 113820637A CN 202111088707 A CN202111088707 A CN 202111088707A CN 113820637 A CN113820637 A CN 113820637A
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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
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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
- G01R33/44—Arrangements or instruments for measuring magnetic variables involving magnetic resonance using nuclear magnetic resonance [NMR]
- G01R33/48—NMR imaging systems
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Abstract
The invention provides a radio frequency cable assembly for a magnetic resonance imaging system and the magnetic resonance imaging system. The radio frequency cable assembly comprises a cable, a wave trap and a limiting and fixing unit, wherein the wave trap is slidably mounted on the cable, and the limiting and fixing unit comprises a sleeving part and a matching part which are relatively fixed; the sleeving part is sleeved with a trap, and the matching part has a switchable locking state and a sliding state; the cooperation portion is fixed centre gripping cable when locking state for the cable can't slide relative suit portion, and when sliding state, cooperation portion and cable slidable relatively. The invention overcomes the defect that the traditional radio frequency cable assembly needs to be wound with a cable, and simplifies the steps of assembling the wave trap and the cable. When the radio frequency debugging is carried out, the matching part is switched to a sliding state, so that the fixing between the matching part and the cable can be released, and the wave trap can be driven to slide on the cable; after the radio frequency debugging is finished, the matching part is switched to a locking state, and then the matching part and the cable can be fixed again, so that the wave trap is fixed on the cable.
Description
Technical Field
The invention relates to the technical field of magnetic resonance imaging, in particular to a radio frequency cable assembly and a magnetic resonance imaging system.
Background
At present, radio frequency cable assemblies are generally adopted in magnetic resonance imaging systems, and comprise cables and wave traps. In practical applications, radio frequency debugging of the radio frequency cable assembly needs to be performed according to the field strength of the imaging system and the radio frequency coil. The traditional radio frequency cable assembly generally adopts a structure that a cable is wound and a wave trap is fixed on the cable, and the structure is not only inconvenient for assembling the cable and the wave trap, but also brings difficulty to radio frequency debugging.
Disclosure of Invention
In view of the above, the present invention provides a radio frequency cable assembly for a magnetic resonance imaging system, the radio frequency cable assembly includes a cable, a wave trap and a limiting and fixing unit, the wave trap is slidably mounted on the cable, the limiting and fixing unit includes a relatively fixed sleeving part and a matching part; the sleeving part is sleeved with a trap, and the matching part has a switchable locking state and a sliding state; the cooperation portion is fixed centre gripping cable when locking state for the cable can't slide relative suit portion, and when sliding state, cooperation portion and cable slidable relatively.
The radio frequency cable assembly provided by the invention overcomes the defect that a cable needs to be wound in the traditional radio frequency cable assembly, simplifies the steps of assembling the wave trap and the cable, and can change the connection and movement states of the wave trap on the cable by adjusting the limiting and fixing unit. When radio frequency debugging is needed, the matching part is switched to a sliding state, and the fixed state between the matching part and the cable can be released, so that the wave trap can be driven to slide on the cable; after the radio frequency debugging is completed, the matching part is switched to a locking state, so that the matching part and the cable can be fixed again, and the wave trap can be fixed on the cable.
In one embodiment, the limiting and fixing unit comprises a first sleeving piece, and the sleeving part and the matching part are arranged on the first sleeving piece; the first sleeving piece is provided with a first through hole penetrating through the matching part, and the cable penetrates through the first through hole and extends into the sleeving part.
So set up, first cover union piece can keep the state of cover on the cable, can not drop from the cable.
In one embodiment, the fitting portion has elasticity, and the minimum diameter of the first through hole can be changed by elastic deformation; the limiting fixing unit also comprises a second sleeving piece detachably connected to the matching part; in a locked state, the outer peripheral wall of the matching part is inserted into the second sleeving part, and the inner wall of the matching part, which is used for forming the first through hole, is in interference fit with the cable; under the sliding state, the matching part is separated from the second sleeving part, and the inner wall of the matching part, which is used for forming the first through hole, is in sliding fit with the cable.
So set up, switch between interference fit connection and split state through cooperation portion and second cover union piece, cooperation portion radially takes place to expand along first through-hole and props or shrink deformation, changes clearance size and pressure size between first through-hole inner wall and the cable outside to change the cooperation state of first cover union piece and cable. The elastic matching part can deform for many times, and has more adjusting times and service life.
In one embodiment, the matching part comprises a plurality of clamping jaws which are convexly arranged at the end part of the sleeving part and are annularly arranged by taking the axis of the first through hole as the center; the peripheral wall of the clamping jaw is provided with threads for connecting with the second sleeving piece.
When the second sleeving piece is matched with the threads on the outer peripheral wall of the clamping jaw, the second sleeving piece applies pressure to the clamping jaws in a radial direction to point to the axis of the first through hole so as to drive the clamping jaws to abut against the cable together; after the second sleeve joint piece breaks away from the cooperation portion, the radial pressure that acts on a plurality of jack catch periphery walls is eliminated, and a plurality of jack catches expand outward along the radial of first through-hole and deform to alleviate the pressure between jack catch and the cable, formed sliding fit between permission cooperation portion and the cable.
In one embodiment, the end parts of the clamping jaws far away from the sleeving part are provided with oblique chamfers; and/or the peripheral wall of the second sleeving part is a conical surface, and the outer diameter of the conical surface is gradually increased along the direction close to the sleeving part.
Due to the arrangement, the inclined chamfer has a guiding function, so that a plurality of clamping jaws can be more conveniently guided to be inserted in the second sleeving part, and the resistance of interference fit between the second sleeving part and the clamping jaws is reduced; the conical surface-shaped peripheral wall of the second sleeving piece can be used as a force application acting surface of a user, so that the comfort of the second sleeving piece in connection with the clamping jaws is improved.
In one embodiment, the number of the first sleeving parts is two, the wave traps are respectively sleeved at the sleeving parts of the two first sleeving parts from two ends of the wave trap and can be mutually butted to enclose to form an accommodating cavity, and the wave traps are fixedly accommodated in the accommodating cavity.
So set up, the assembly process of spacing fixed unit, trapper and cable is simpler.
In one embodiment, the sleeving parts of the two first sleeving parts are connected in a threaded fit manner; or the sleeving parts of the two first sleeving parts are connected in a butt-inserting buckling mode.
So set up, two first cover joints can be reliably fixed, can protect the trapper better.
In one embodiment, the number of the wave traps and the limiting fixing units is matched, and the wave traps and the limiting fixing units are in multiple groups.
So set up, can establish a plurality of trappers on same root cable cover to correspond every trapper of connecting respectively with a plurality of spacing fixed unit, thereby can be through the motion and the connection status of every trapper on the cable of these spacing fixed unit control.
In one embodiment, the wave trap comprises a first insulator and a second insulator which are connected with each other, and the cable is arranged between the first insulator and the second insulator in a penetrating way; the first insulator and the second insulator are connected by a threaded fastener with a play margin therebetween to allow the first insulator and the second insulator to move relatively close to or away from each other within the play margin.
So set up, the interval between first insulator and the second insulator is adjustable to make things convenient for the radio frequency debugging.
In one embodiment, the first insulator and the first insulator are both provided with a metal covering layer, and the metal covering layer is a metal foil or a metal plating layer.
The invention also provides a magnetic resonance imaging system comprising a radio frequency cable assembly as defined in any one of the preceding claims.
Drawings
FIG. 1 is an exploded view of a radio frequency cable assembly according to one embodiment of the present invention;
FIG. 2 is a perspective view of a first coupling member of the RF cable assembly of FIG. 1;
FIG. 3 is a perspective view of a second coupler of the RF cable assembly of FIG. 1;
fig. 4 is an assembly view of a radio frequency cable assembly according to another embodiment of the present invention.
Description of reference numerals:
100. a radio frequency cable assembly; 10. a cable; 20. a wave trap; 30. a limiting and fixing unit;
21. a first insulator; 22. a second insulator; 23. a threaded fastener;
31. a first sleeve member; 301. a sheathing part; 302. a fitting portion; 3021. a claw; 303. a first through hole; 304. a containing groove;
32. a second spigot; 321. a second through hole; 322. and (5) inserting the grooves.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.
At present, radio frequency cable assemblies are generally adopted in magnetic resonance imaging systems, and comprise cables and wave traps. In practical applications, radio frequency debugging of the radio frequency cable assembly needs to be performed according to the field strength of the imaging system and the radio frequency coil. However, the conventional radio frequency cable assembly generally adopts a structure that a cable is wound and a wave trap is fixed on the cable, which not only is inconvenient for assembling the wave trap and the cable, but also brings difficulty to radio frequency debugging.
In view of this, the present invention provides a radio frequency cable assembly 100 for a magnetic resonance imaging system, the radio frequency cable assembly 100 includes a cable 10, a wave trap 20 and a position-limiting fixing unit 30. The wave trap 20 is slidably mounted on the cable 10, and the limit fixing unit 30 is used for a user to adjust according to actual use conditions so as to change the connection and movement state of the wave trap 20 relative to the cable 10. When radio frequency debugging is needed, the limiting and fixing unit 30 is adjusted to enable the wave trap 20 and the cable 10 to form sliding connection, and at the moment, the position of the wave trap 20 on the cable 10 can be changed; after the radio frequency debugging is completed, the limiting and fixing unit 30 is adjusted to fixedly connect the wave trap 20 and the cable 10, and the position of the wave trap 20 on the cable 10 is fixed.
Referring to fig. 1, fig. 1 is an exploded view of an rf cable assembly 100 according to an embodiment of the present invention.
Specifically, in the present embodiment, the wave trap 20 includes a first insulator 21 and a second insulator 22 connected to each other by a threaded fastener 23. The cable 10 is movably inserted between the first insulator 21 and the second insulator 22, and finally the first insulator 21 and the second insulator 22 are slidably mounted on the cable 10 as a whole. The first insulator 21 and the second insulator 22 have a moving margin therebetween, and the moving margin can be used for a user to drive the first insulator 21 and the second insulator 22 to move relatively close to or away from each other within the moving margin range by means of adjusting the threaded fastener 23.
Optionally, in this embodiment, the first insulator 21 and the second insulator 22 are two semi-cylinders, and the shape of the wave trap 20 formed by splicing the two semi-cylinders is substantially a cylinder.
The material of the first insulator 21 and the second insulator 22 may be teflon, or may be other types of dielectric materials, which is not limited herein.
Optionally, a side of the first insulator 21 opposite to the second insulator 22 and a side of the second insulator 22 opposite to the first insulator 21 are both provided with a metal covering layer, and the metal covering layer may be a metal foil which is arranged in an attaching manner, or may be a metal plating layer. The material of the metal covering layer is preferably copper.
Please refer to fig. 1 again, and refer to fig. 2 to 3. Fig. 2 is a perspective view of the first coupling member 31 of the rf cable assembly 100 shown in fig. 1; fig. 3 is a perspective view of the second coupling member 32 of the rf cable assembly 100 shown in fig. 1.
Further, the limiting fixing unit 30 includes a first sleeving member 31, and the sleeving portion 301 and the matching portion 302 are both disposed on the first sleeving member 31 and are arranged along the axial direction of the first sleeving member 31.
The sheathing part 301 is a hollow sleeve-shaped structure, and is provided with a containing groove 304 for sheathing the wave trap 20, the containing groove 304 forms a sheathing opening at one end of the sheathing part 301, and the sheathing part 301 is sheathed with the wave trap 20 and then fixed as a whole with the wave trap 20.
The matching part 302 is arranged at one end of the sheathing part 301 which is relatively far away from the sheathing opening and has a switchable locking state and a sliding state. In the locked state, the fitting portion 302 can be clamped and fixed on the cable 10, so that the cable 10 cannot slide relative to the sheathing portion 301; in the sliding state, the clamping pressure of the fitting portion 302 on the cable 10 is reduced or released, and the fitting portion 302 and the cable 10 can slide relatively.
Therefore, when the connection and movement state of the wave trap 20 relative to the cable 10 needs to be changed, the connection state of the first connector 31 and the cable 10 can be switched by only switching the engaging portion 302 to the locking state or the sliding state, so that the wave trap 20 slides or is fixed relative to the cable 10 together with the first connector 31.
Specifically, the housing portion 301 and the fitting portion 302 are integrally molded in this embodiment. The first connecting member 31 has a first through hole 303 penetrating the engaging portion 302, and the first through hole 303 communicates with the receiving groove 304. The cable 10 passes through the matching portion 302 from the first through hole 303 and extends into the receiving groove 304 in the sheathing portion 301.
Further, in the present embodiment, the fitting portion 302 has elasticity, and can expand or contract along the radial direction of the first through hole 303 under the action of an external force to change the minimum diameter of the first through hole 303. When the minimum diameter of the first through hole 303 is smaller than the diameter of the cable 10, it means that an interference fit is formed between the fitting portion 302 and the cable 10, and the fitting portion 302 is in a locked state, whereas a transition fit or a clearance fit is formed between the fitting portion 302 and the cable 10, and the fitting portion 302 is in a sliding state, allowing the cable 10 to slide in the first through hole 303.
It should be noted that the minimum diameter of the first through hole 303 corresponds to the diameter of the first through hole 303 at the opening of the fitting portion 302 at the end relatively far from the housing portion 301. Since the fitting portion 302 has elasticity, the minimum diameter of the first through hole 303 is not a constant value but is changed as the fitting portion 302 is switched between the locking state and the sliding state. The minimum diameter dimension of the first through hole 303, which is smaller in the locked state than in the sliding state, directly determines whether relative movement between the fitting portion 302 and the cable 10 is possible.
The engaging portion 302 has elasticity, which facilitates the deformation of the engaging portion 302 in a very short time to restore from the locking state to the sliding state, which is a preferred embodiment. However, the elasticity of the fitting portion 302 is not a necessary arrangement for switching the fitting portion 302 between the locked state and the sliding state. The change in the minimum diameter dimension of the first through-hole 303 may also be achieved in other ways.
In this embodiment, the number of the first sleeving parts 31 is two, the sleeving openings of the two first sleeving parts 31 are oppositely arranged, the sleeving parts 301 of the two first sleeving parts 31 are respectively sleeved with the wave trap 20 from two ends of the wave trap 20, the two first sleeving parts can be mutually butted into a whole, and form an accommodating cavity by enclosing together, so that the wave trap 20 is fixedly accommodated in the accommodating cavity.
In an embodiment not shown in the drawings, the first sleeving member 31 for accommodating one wave trap 20 may further include a plurality of sleeving ring portions, and the plurality of sleeving ring portions are sleeved with the cable 10 and combined into a whole in a coaxial series connection manner, so as to jointly enclose and form the accommodating groove 304. The number of bell and spigot ring portions may be 2-4.
In the structure in which these socket ring portions are combined into one body, the socket ring portion located at one end thereof is used to form the fitting portion 302, and the remaining socket ring portions are used to form the housing portion 301.
Further, in order to ensure that the two first sleeving parts 31 are firmly fixed after being butted, the two sleeving parts 301 are connected in a thread fit manner, one end of one of the sleeving parts 301 corresponding to the sleeving opening is provided with a flange which protrudes outwards along the axial direction, the outer peripheral surface of the flange is provided with threads, and the flange is arranged in the accommodating groove 304 of the sleeving part 301 of the other first sleeving part 31 in a penetrating manner.
Of course, the two housing portions 301 may be connected by being inserted and engaged in the axial direction, and are not necessarily connected by a screw-fit manner.
The axial length of the sleeving parts 301 of the two first sleeving parts 31 may be the same or different, as long as the two sleeving parts can be butted into a whole, so that the two accommodating grooves 304 are fused to form an accommodating cavity, and the wave trap 20 can be fixedly accommodated in the accommodating cavity.
In one embodiment, the position-limiting fixing unit 30 further includes a second sleeving member 32 detachably connected to the matching portion 302, the second sleeving member 32 is provided with an insertion groove 322 and a second through hole 321, the insertion groove 322 is used for sleeving the matching portion 302, and the shape of the insertion groove 322 matches with the matching portion 302; the second through hole 321 is communicated with the insertion groove 322 for sleeving the cable 10, and a transition fit or a clearance fit is formed between the second through hole 321 and the cable 10, so that the second sleeving part 32 can slide on the cable 10.
When the matching part 302 is inserted into the second sleeve connector 32 and the outer circumferential wall of the matching part 302 is in interference fit with the inner wall of the insertion groove 322, the inner wall of the insertion groove 322 applies pressure to the outer circumferential wall of the matching part 302 to promote the radial contraction and deformation of the matching part 302 along the first through hole 303 to drive the minimum diameter of the first through hole 303 to be reduced, so that the inner wall for forming the first through hole 303 forms interference fit with the cable 10, and the matching part 302 is in a locked state; after the matching part 302 and the second sleeve connecting piece 32 are mutually detached, the matching part 302 is not pressed by the inner wall of the insertion groove 322 any more, the matching part 302 is radially expanded and deformed along the first through hole 303 at the moment, the minimum diameter of the first through hole 303 is increased, the inner wall of the first through hole 303 and the cable 10 form transition fit or clearance fit capable of sliding relatively, and the matching part 302 is marked to be in a sliding state.
Further, the mating portion 302 includes a plurality of claws 3021, and the plurality of claws 3021 are convexly provided on an end portion of the sheathing portion 301 on a side relatively far from the sheathing opening. And a plurality of jack catchs 3021 use the axis of first through-hole 303 to establish as the center equipartition ring, are provided with between two arbitrary adjacent jack catchs 3021 and dodge the clearance, dodge the effect in clearance and be: after the plurality of claws 3021 are inserted into the insertion groove 322 of the second sleeve-connecting member 32, the plurality of claws 3021 can elastically contract and move toward the axis close to the first through hole 303, so that interference or collision between adjacent claws 3021 is avoided, and the overall elastic deformation and the ability of restoration and deformation of the matching part 302 are also increased.
In the present embodiment, the number of the claws 3021 is eight.
Of course, in other embodiments, the number of the claws 3021 is not limited to eight, and may be two, three or four, or may be more than eight as long as the fitting portion 302 can be made elastic.
Alternatively, a thread is arranged on the outer peripheral wall of one end of the plurality of clamping jaws 3021 relatively close to the sheathing part 301, an inner thread matched with the thread is arranged on the inner wall of the cartridge slot 322, and the plurality of clamping jaws 3021 can be connected with the second sheathing member 32 in a threaded manner after being inserted into the cartridge slot 322. Through the threaded connection, the claw 3021 and the second sleeve joint member 32 are not easily loosened, and the second sleeve joint member 32 can continuously apply pressure to the claw 3021 for a long time, so that the plurality of claws 3021 can reliably clamp the cable 10 for a long time, and the effect of fixing the matching part 302 with the cable 10 in the locked state is improved.
It will be appreciated that the provision of threads on the peripheral wall of the plurality of dogs 3021 which engage the inner wall of the cartridge slot 322 is not the only means of achieving a releasable connection between the first and second connectors 31, 32. In other embodiments, the engaging portion 302 and the second sleeve member 32 may be detachably connected by other means, such as providing a flange or protrusions spaced apart from each other and continuously extending along the circumferential direction of the axis of the second through hole 321 on the inner wall of the insertion slot 322, providing an engaging groove on the outer circumferential wall of the engaging portion 302 for engaging with the flange or protrusions, and fixing the first sleeve member 31 and the second sleeve member 32 by clipping; in other embodiments, the second socket 32 may not be provided, and the locked state and the sliding state of the engaging portion 302 may be switched by directly or indirectly applying a force to the engaging portion 302, or the connection state and the movement state between the engaging portion 302 and the cable 10 may be changed.
Optionally, the outer edge of the end of the plurality of jaws 3021 facing away from the encasement portion 301 is provided with a beveled chamfer. The inclined chamfer has a guiding function, so that the claw 3021 can be more conveniently and easily guided to be quickly and accurately inserted into the second sleeving part 32, the connecting coaxiality of the first sleeving part 31 and the second sleeving part 32 is improved, and the resistance of the first sleeving part and the second sleeving part during insertion is reduced.
Alternatively, the outer peripheral wall of the second socket member 32 is a tapered surface, and the outer diameter dimension of the tapered surface increases in a direction approaching the housing portion 301. With such an arrangement, the peripheral wall of the second sleeve member 32 can serve as a force application surface for a user to insert the first sleeve member 31 and the second sleeve member 32, and the comfort of the user in applying an insertion pushing force directed to the first sleeve member 31 to the second sleeve member 32 is better.
Alternatively, in this embodiment, the mating portions 302 of both first connectors 31 are detachably connected to the second connectors 32. With this arrangement, when one of the second nesting members 32 or the first nesting member 31 fails, for example, one of the second nesting members 32 is broken, or the elasticity of the matching portion 302 of one of the first nesting members 31 is lost or the threads are slipped off, the other first nesting member 31 and the second nesting member 32 can still be used normally, so that the wave trap 20 does not lose the function of switching the connection and movement states on the cable 10.
It should be noted that the provision of two first nesting members 31 that nest them from both ends of the wave trap 20 is only one preferred means for facilitating the assembly of the restraint fixing unit 30 and the wave trap 20. In other embodiments, only one first sleeving member 31 may be provided, in which case, the first sleeving member 31 may be a cylindrical bag-shaped structure, both ends of the first sleeving member are provided with the matching portions 302, and the first through holes 303 formed on both the matching portions 302 can allow the wave trap 20 to pass through and enter the accommodating groove 304; correspondingly, the matching portions 302 have a larger deformation range, and after the wave trap 20 is installed in the accommodating groove 304, the two second connectors 32 are respectively connected with the two matching portions 302 to drive the two matching portions 302 to contract in the radial direction and to be in interference fit with the cable 10, so that the wave trap 20 is packaged in the first connector 31.
Referring to fig. 4, fig. 4 is an assembly view of an rf cable assembly 100 according to another embodiment of the invention.
In one embodiment, the number of the wave traps 20 and the limit fixing units 30 is matched, and the wave traps and the limit fixing units are all in multiple groups. A plurality of wave traps 20 are sleeved on the same cable 10, and the plurality of limiting and fixing units 30 are respectively and correspondingly connected with each wave trap 20, so that the movement and the connection state of each wave trap 20 on the cable 10 can be changed.
The invention also provides a magnetic resonance imaging system, which comprises the radio frequency cable assembly 100 provided by the invention.
The radio frequency cable assembly 100 provided by the invention overcomes the defect that the cable 10 needs to be wound on the traditional radio frequency cable assembly 100, simplifies the assembly steps of the wave trap 20 and the cable 10, can change the connection and movement states of the wave trap 20 on the cable 10 by adjusting the limiting and fixing unit 30, and can release the fixed state between the matching part 302 and the cable 10 by switching the matching part 302 to the sliding state when radio frequency debugging is needed, so that the wave trap 20 can be driven to slide on the cable 10; after the radio frequency tuning is completed, the matching portion 302 is switched to the locking state, so that the matching portion 302 and the cable 10 can be fixed again, and the wave trap 20 can be fixed on the cable 10.
The features of the above-described embodiments may be arbitrarily combined, and for the sake of brevity, all possible combinations of the features in the above-described embodiments are not described, but should be construed as being within the scope of the present disclosure as long as there is no contradiction between the combinations of the features.
It should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention and are not to be used as a limitation of the present invention, and that suitable changes and modifications of the above embodiments are within the scope of the claimed invention as long as they are within the spirit and scope of the present invention.
Claims (10)
1. A radio frequency cable assembly for a magnetic resonance imaging system, the radio frequency cable assembly comprising a cable (10), a wave trap (20) and a spacing fixing unit (30), the wave trap (20) being slidably mounted to the cable (10), the spacing fixing unit (30) comprising a relatively fixed sleeving part (301) and a fitting part (302);
the wave trap (20) is sleeved on the sleeving part (301), and the matching part (302) has a switchable locking state and a switchable sliding state; the matching part (302) fixedly clamps the cable (10) in the locking state, so that the cable (10) cannot slide relative to the sleeving part (301), and in the sliding state, the matching part (302) and the cable (10) can slide relative to each other.
2. The radio frequency cable assembly according to claim 1, wherein the spacing fixing unit (30) comprises a first nesting member (31), the nesting portion (301) and the mating portion (302) being both provided on the first nesting member (31); the first sleeving piece (31) is provided with a first through hole (303) penetrating through the matching part (302), and the cable (10) penetrates through the first through hole (303) and extends into the sleeving part (301).
3. The radio frequency cable assembly according to claim 2, wherein the fitting portion (302) has elasticity capable of changing a minimum diameter of the first through hole (303) by elastic deformation; the limit fixing unit (30) further comprises a second sleeving piece (32) detachably connected to the matching part (302);
in the locked state, the peripheral wall of the matching part (302) is inserted into the second sleeve connector (32), and the inner wall of the matching part (302) for forming the first through hole (303) is in interference fit with the cable (10); in the sliding state, the matching part (302) is separated from the second sleeving piece (32), and the inner wall of the matching part (302) for forming the first through hole (303) is matched with the cable (10) in a sliding mode.
4. A radio frequency cable assembly according to claim 3, wherein the mating portion (302) comprises a plurality of claws (3021), the claws (3021) being provided protruding from the end of the sheathing portion (301) and being annularly arranged around the axis of the first through hole (303); the outer peripheral wall of the claw (3021) is provided with threads for connecting with the second sleeve connector (32).
5. The radio frequency cable assembly according to claim 4, wherein the end of the plurality of claws (3021) remote from the encasement portion (301) is provided with a chamfer; and/or the presence of a catalyst in the reaction mixture,
the peripheral wall of second cover union piece (32) is the conical surface, just the external diameter size of conical surface is followed closely the direction of suit portion (301) increases gradually.
6. The radio frequency cable assembly according to claim 2, wherein the number of the first nesting parts (31) is two, and the nesting parts (301) of the two first nesting parts (31) are respectively nested on the wave trap (20) from two ends of the wave trap (20) and can be butted with each other to form a containing cavity in a surrounding manner, and the wave trap (20) is fixedly contained in the containing cavity.
7. The radio frequency cable assembly according to claim 1, wherein the number of the wave traps (20) and the spacing fixing units (30) is matched, and is in a plurality of groups.
8. The radio frequency cable assembly according to claim 1, wherein the wave trap (20) comprises a first insulator (21) and a second insulator (22) connected to each other, the cable (10) being inserted between the first insulator (21) and the second insulator (22);
the first insulator (21) and the second insulator (22) are connected by a threaded fastener (23) with a play therebetween to allow the first insulator (21) and the second insulator (22) to move relatively close to or away from each other within the play.
9. The radio frequency cable assembly according to claim 8, wherein the first insulator (21) and the second insulator (22) are each provided with a metal coating, the metal coating being a metal foil or a metal plating.
10. A magnetic resonance imaging system, characterized in that it comprises a radio frequency cable assembly according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111088707.9A CN113820637B (en) | 2021-09-16 | 2021-09-16 | Radio frequency cable assembly and magnetic resonance imaging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111088707.9A CN113820637B (en) | 2021-09-16 | 2021-09-16 | Radio frequency cable assembly and magnetic resonance imaging system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113820637A true CN113820637A (en) | 2021-12-21 |
| CN113820637B CN113820637B (en) | 2024-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111088707.9A Active CN113820637B (en) | 2021-09-16 | 2021-09-16 | Radio frequency cable assembly and magnetic resonance imaging system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114883032A (en) * | 2022-04-29 | 2022-08-09 | 翔耀电子(深圳)有限公司 | Cable module |
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| CN114883032A (en) * | 2022-04-29 | 2022-08-09 | 翔耀电子(深圳)有限公司 | Cable module |
| CN114883032B (en) * | 2022-04-29 | 2024-04-12 | 翔耀电子(深圳)有限公司 | Cable module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113820637B (en) | 2024-09-03 |
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