CN207752130U - MR imaging apparatus - Google Patents
MR imaging apparatus Download PDFInfo
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- CN207752130U CN207752130U CN201721788295.9U CN201721788295U CN207752130U CN 207752130 U CN207752130 U CN 207752130U CN 201721788295 U CN201721788295 U CN 201721788295U CN 207752130 U CN207752130 U CN 207752130U
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Abstract
The utility model is related to mr imaging technique fields, more particularly to a kind of MR imaging apparatus, including gradient coil and body coil and vacuum insulation layer；Gradient coil is equipped with along the axially extending host cavity of gradient coil, and body coil is installed in host cavity；Vacuum insulation layer is set between gradient coil and body coil, is used for gradient coil and body coil vacuum insulation.Vacuum insulation layer is arranged in gradient coil and body coil, by gradient coil and body coil vacuum insulation in the MR imaging apparatus.In this way, having cut off the sound transmission approach between gradient coil and body coil, it effectively prevent the noise transmission that gradient switching generates to body coil, to weaken the intensity of sound that the patient being located in patient passageways can perceive, has achieved the effect that reduce noise.
Description
Technical field
The utility model is related to mr imaging technique fields, more particularly to a kind of MR imaging apparatus.
Background technology
In traditional magnetic resonance imaging (MRI) equipment, gradient coil is located in main field.Due to being connected in gradient coil
Alternating current, according to the Left Hand Rule of electromagnetism, the electrified metal silk in gradient coil is acted on by Lorentz force.When electric current urgency
When drastic change, wire stress in gradient coil also respective change, to generate violent vibrations, here it is gradient switchings to produce
The reason of raw noise.In magnetic resonance system, there are mainly two types of routes of transmission for noise：It is passed by air borne and by structural member
It broadcasts.In air borne approach, the air adjacent with gradient coil will generate vibration, and by Vibration propagation to neighbouring component,
Such as shell and body coil.In the approach propagated by structural member, the vibration that is generated in gradient coil by with gradient line
The solid-state junction component being in direct contact is enclosed, neighbouring other components are transmitted to.Above-mentioned solid-state junction component includes being contacted with gradient coil
Various parts, such as magnet and body coil, the shell etc. that are fixed on magnet.
It is located on the sick bed on the inside of body coil due to patient, therefore for patients, the perceived sound of institute mainly comes
Derived from the sound directly propagated by body coil.
Utility model content
Based on this, it is necessary to which in traditional magnetic resonance equipment, body coil is asked by gradient coil vibration effect is larger
Topic provides a kind of gradient coil that can weaken and vibrates the MR imaging apparatus transmitted to body coil.
Above-mentioned purpose is achieved through the following technical solutions：
A kind of MR imaging apparatus, including gradient coil and body coil and vacuum insulation layer；Gradient coil is equipped with edge
The axially extending host cavity of gradient coil, body coil are installed in host cavity；
Vacuum insulation layer is set between gradient coil and body coil, is used for gradient coil and body coil vacuum insulation.
Sound insulation cylinder, sound insulation cylinder and gradient coil are provided between gradient coil and body coil in one of the embodiments,
Between have interval；Interval between gradient coil and sound insulation cylinder can be evacuated, to form vacuum insulation layer；
Or there is interval between gradient coil and body coil, and the interval can be evacuated, with formed vacuum every
Absciss layer.
In one of the embodiments, when vacuum separation layer is formed by the interval between gradient coil and sound insulation cylinder,
The both ends of gradient coil are both provided with the first connecting flange, and the both ends of sound insulation cylinder are both provided with the second connecting flange, and each first
Connecting flange is tightly connected with corresponding second connecting flange using the first sealing plate.
In one of the embodiments, first through the end face of gradient coil is equipped on the both ends end face of gradient coil
Annular embedded groove, the one end of the first connecting flange far from the first sealing plate are inserted in first annular embedded groove.
The second annular through the end face of sound insulation cylinder is equipped on the both ends end face of sound insulation cylinder in one of the embodiments,
Embedded groove, the one end of the second connecting flange far from the first sealing plate are inserted in the second annular embedded groove.
In one of the embodiments, when vacuum separation layer is formed by the interval between gradient coil and body coil,
The both ends of gradient coil are both provided with third connecting flange, and the both ends of body coil are both provided with the 4th connecting flange, each third
Connecting flange is tightly connected with corresponding 4th connecting flange using the second sealing plate.
In one of the embodiments, the third through the end face of gradient coil is equipped on the both ends end face of gradient coil
Annular embedded groove, the one end of third connecting flange far from the second sealing plate are inserted in third annular embedded groove.
In one of the embodiments, the fourth annular through the end face of body coil is equipped on the both ends end face of body coil
Embedded groove, the 4th one end of connecting flange far from the second sealing plate are inserted in fourth annular embedded groove.
A kind of MR imaging apparatus, including gradient coil and body coil and separation layer；Gradient coil is equipped with along gradient
The axially extending host cavity of coil, body coil are installed in host cavity；
Separation layer is set between gradient coil and body coil, and the end of neighbouring separation layer is equipped with pipeline or opening,
And can will be vacuumized inside separation layer by the pipeline or opening, or can be by the part inside separation layer by the pipeline or opening
Region vacuumizes.
In one of the embodiments, separation layer be cyclic structure, and separation layer and gradient coil be in direct contact or
Every setting.
Above-mentioned MR imaging apparatus at least has the following technical effects：In gradient coil and body coil, vacuum insulation is set
Layer or at least partly region are the separation layer of vacuum, have cut off the sound transmission approach between gradient coil and body coil, have prevented
The noise transmission that gradient switching generates is to body coil, to effectively reduce noise.
Description of the drawings
Fig. 1 is the structural schematic diagram for the MR imaging apparatus that one embodiment of the utility model provides；
Fig. 2 is the structural schematic diagram for the MR imaging apparatus that another embodiment of the utility model provides；
Fig. 3 is the principle schematic for the MR imaging apparatus that one embodiment of the utility model provides.
Wherein：
001- MR imaging apparatus；
100- main magnets；
105- imaging regions；111- pulse control units；112- gradient signals generate unit；
113,114,115- gradient amplifiers；116- radio-frequency pulses generate unit；117- switch control units；
118- rf receiver units；121- image reconstruction units；122- processors；123- display units；
124- input-output apparatus；125- storage units；126- communication port；127- communication bus；
200- gradient coils；
201- host cavities；
The first connecting flanges of 210-；The first annular embedded grooves of 220-；
230- third connecting flanges；240- third annular embedded grooves；
300- body coils；
The 4th connecting flanges of 310-；320- fourth annular embedded grooves；
400- vacuum insulation layers；
410- sound insulation cylinders；The second connecting flanges of 411-；The annular embedded grooves of 412- second；
The first sealing plates of 420-；
The second sealing plates of 430-；
500- imaging objects；
600- is scanning bed；
700- local coils.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, by the following examples, it and ties
Attached drawing is closed, the MR imaging apparatus of the utility model is further elaborated.It should be appreciated that tool described herein
Body embodiment only to explain the utility model, is not used to limit the utility model.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.On the contrary, when element is referred to as " directly existing " another element "upper",
There is no intermediary elements.Term as used herein " vertically ", " horizontal ", "left", "right" and similar statement are
For illustrative purposes.
Magnetic resonance imaging (MRI) equipment is widely used to medical diagnostic field, and basic principle is generated using magnet
Uniform high-intensity magnetic field will diagnose the hydrogen atom in subject and polarize in the case where being generated with specific gradient fields from gradient coil,
Then radio frequency pulse excitation hydrogen nuclei is emitted by body radio-frequency coil, causes nuclear resounce, and absorb energy.Stopping penetrating
After frequency pulse, hydrogen nuclei sends out electric signal by specific frequency, and the energy of absorption is released, by external receiver
It includes, image is obtained after electronic computer is handled.
Current common magnet is superconducting magnet, and the superconducting magnet is usually annular tubular structure.And body radio-frequency coil,
Gradient coil is all annular tubular structure as superconducting magnet, and three's almost coaxial.The dimensional orientation of three is：Body is penetrated
Frequency coil is in innermost layer, and gradient coil is in body radio-frequency coil outer layer, and superconducting magnet is in gradient coil outer layer.Inside body radio-frequency coil
Hollow cavity be detect space (or patient passageways).
As depicted in figs. 1 and 2, the MR imaging apparatus 001 that one embodiment of the utility model provides, including gradient coil
200 and body coil 300 and vacuum insulation layer 400.200 inside of gradient coil is equipped with along the axially extending receipts of gradient coil 200
Vessel 201, body coil 300 are installed in host cavity 201；Vacuum insulation layer 400 is set to gradient coil 200 and body coil 300
Between, it is used for gradient coil 200 and 300 vacuum insulation of body coil.
Wherein, gradient coil 200 includes three groups of sub- gradient coil sets, is denoted as Gx gradient coils, Gy gradient coils respectively
With Gz gradient coils.The gradient magnetic direction that above-mentioned three groups of sub- gradient coil sets respectively generate is mutually orthogonal in space, usually
With the horizontal direction, vertical direction and scanning head of a bed foot side for scanning head of a bed foot direction in space coordinates perpendicular to magnetic resonance equipment
It is also consistent with the gradient magnetic direction of three logic axles in pulse train to consistent.It is appreciated that three groups of sub- gradient coils can be with
Isolated operation, also can arbitrary two groups of coils run simultaneously, also can three groups of coils run simultaneously, i.e. synthesis any direction on demand
Gradient magnetic.It is appreciated that three groups of sub- gradient coils of gradient coil 200 are molded into resin material or other insulating materials
Become a monolithic construction after type, it is substantially cylindrical.The periphery wall of gradient coil 200 can be formed by insulating materials,
And it is closed, airtight.The inside of gradient coil 200 has along its axially extending host cavity 201.
Body coil 300 is body radio-frequency coil above-mentioned, is installed in host cavity 201.Specifically, body coil 300
It is installed in the host cavity 201 that 200 inside of gradient coil is formed.And the hollow cavity of 300 inside of body coil is the trouble for detection
Person channel.Vacuum insulation layer 400 is set between gradient coil 200 and body coil 300, by gradient coil 200 and body coil 300
Vacuum insulation.In this way, having cut off the sound transmission approach between gradient coil 200 and body coil 300, gradient is effectively prevent to switch
The noise transmission of generation is reached to body coil 300 to weaken the intensity of sound that the patient being located in patient passageways can perceive
Having arrived reduces the effect of noise.
The structure type of vacuum insulation layer 400 can be a variety of.Referring to Fig. 1, as a kind of enforceable mode, gradient line
It is provided with sound insulation cylinder 410 between circle 200 and body coil 300, there is interval between sound insulation cylinder 410 and gradient coil 200；Gradient line
Interval between circle 200 and sound insulation cylinder 410 can be evacuated, to form vacuum insulation layer 400.
Wherein, sound insulation cylinder 410 is using insulating materials, such as fiberglass, acrylic, ABS etc..Selectively, sound insulation cylinder 410
Both ends respectively with the both ends of gradient coil 200 be tightly connected.
In one embodiment, the both ends of gradient coil 200 are both provided with the first connecting flange 210, and the both ends of sound insulation cylinder 410 are equal
It is provided with the second connecting flange 411, each first connecting flange 210 utilizes the first sealing with corresponding second connecting flange 411
Plate 420 is tightly connected.Wherein, metal or nonmetallic materials, such as stainless steel, Ya Ke may be used in the first connecting flange 210
Power etc..Second connecting flange 411 may be used the materials such as stainless steel, acrylic and be made.One end of first connecting flange 210 and ladder
Coil 200 to be spent to be tightly connected, the other end is tightly connected by one end of the first sealing plate 420 and the second connecting flange 411, and second
The other end of connecting flange 411 is tightly connected with sound insulation cylinder 410.
Further, it is equipped with through the first annular of the end face of gradient coil 200 on the both ends end face of gradient coil 200
Embedded groove 220, the one end of the first connecting flange 210 far from the first sealing plate 420 are inserted in first annular embedded groove 220.The
One end of one connecting flange 210 first annular embedded groove 220 in a manner of being partially submerged into gradient coil end, with gradient line
Circle 200 realizes reliable sealed connection.It, can profit after first annular embedded groove 220 is inserted into one end of the first connecting flange 210
It is filled in silica gel or resin etc. at the gap between the first connecting flange 210 and first annular embedded groove 220, it is close to realize
Sealing is fixed.
It in some embodiments, can also be in gradient coil 200 resin material or other insulating materials injection moldings
In the process, one end of the first connecting flange 210 is inserted into the end of gradient coil 200, final curing so that the first connecting flange
210 with the integrated curing molding of gradient coil 200.
Selectively, the second annular being equipped on the both ends end face of sound insulation cylinder 410 through the end face of sound insulation cylinder 410 is embedded
Slot 412, the one end of the second connecting flange 411 far from the first sealing plate 420 are inserted in the second annular embedded groove 412.Second connects
One end of acting flange 411 the second annular embedded groove 412 in a manner of being partially submerged into sound insulation cylinder end, it is real with sound insulation cylinder 410
Reliable sealed connection is showed.After the second annular embedded groove 412 is inserted into one end of the second connecting flange 411, using silica gel
Or resin etc. is filled at the gap between the second connecting flange 411 and the second annular embedded groove 412, to realize that sealing is solid
It is fixed.
It in some embodiments, can also be during sound insulation 410 injection molding of cylinder, by the second connecting flange 411
The end of sound insulation cylinder 410, final curing are inserted into one end so that the second connecting flange 411 and the integrated curing molding of sound insulation cylinder 410.
And the connection of the first connecting flange 210, the second connecting flange 411 and the first sealing plate 420, may be used welding or
Person such as is bolted at the modes, is formed and is tightly connected.
In the present embodiment, by rigid connection it is an entirety by gradient coil 200 and sound insulation cylinder 410, can effectively drops
The intrinsic frequency of low original gradient coil, can also reduce noise to a certain extent.
As another enforceable mode there is interval between gradient coil 200 and body coil 300 referring to Fig. 2, and
The interval can be evacuated, to form vacuum insulation layer 400.In the present embodiment, it is not necessarily to additional designs sound insulation barrel structure, and
It is directly using the agent structure of body coil 300 as sound insulation barrel structure.Directly between gradient coil 200 and body coil 300
Interval carries out vacuumize process, and is formed for cutting off the noise transmission of gradient switching generation to the vacuum insulation of body coil 300
Layer 400.In this way, contributing to the overall structure of simplified MR imaging apparatus 001.
In one embodiment, the both ends of body coil 300 are tightly connected with the both ends of gradient coil 200 respectively.
Selectively, the both ends of gradient coil 200 are both provided with third connecting flange 230, and the both ends of body coil 300 are all provided with
It is equipped with the 4th connecting flange 310, each third connecting flange 230 utilizes the second sealing plate with corresponding 4th connecting flange 310
430 are tightly connected.Wherein, metal or nonmetallic materials, such as stainless steel, acrylic may be used in third connecting flange 230
Deng.4th connecting flange 310 may be used the materials such as stainless steel, acrylic and be made.One end of third connecting flange 230 and gradient
Coil 200 is tightly connected, and the other end is tightly connected by one end of the second sealing plate 430 and the 4th connecting flange 310, and the 4th connects
The other end of acting flange 310 is tightly connected with body coil 300.
Further, the third annular through the end face of gradient coil 200 is equipped on the both ends end face of gradient coil 200
Embedded groove 240, the one end of third connecting flange 230 far from the second sealing plate 430 are inserted in third annular embedded groove 240.The
One end of three connecting flanges 230 third annular embedded groove 240 in a manner of being partially submerged into gradient coil end, with gradient line
Circle 200 realizes reliable sealed connection.It, can profit after third annular embedded groove 240 is inserted into one end of third connecting flange 230
It is filled in silica gel or resin etc. at the gap between third connecting flange 230 and third annular embedded groove 240, it is close to realize
Sealing is fixed.
It in some embodiments, can also be in gradient coil 200 resin material or other insulating materials injection moldings
In the process, one end of third connecting flange 230 is inserted into the end of gradient coil 200, final curing so that third connecting flange
230 with the integrated curing molding of gradient coil 200.
Further, the fourth annular insertion through the end face of body coil 300 is equipped on the both ends end face of body coil 300
Slot 320, the one end of the 4th connecting flange 310 far from the second sealing plate 430 are inserted in fourth annular embedded groove 320.4th connects
One end of acting flange 310 fourth annular embedded groove 320 in a manner of being partially submerged into body coil end, it is real with body coil 300
Reliable sealed connection is showed.After fourth annular embedded groove 320 is inserted into one end of the 4th connecting flange 310, using silica gel
Or resin etc. is filled at the gap between the 4th connecting flange 310 and fourth annular embedded groove 320, to realize that sealing is solid
It is fixed.
It in some embodiments, can also be during 300 injection molding of body coil, by the 4th connecting flange 310
The end of body coil 300, final curing are inserted into one end so that the 4th connecting flange 310 and the integrated curing molding of body coil 300.
And the connection of third connecting flange 230, the 4th connecting flange 310 and the second sealing plate 430, may be used welding or
Person such as is bolted at the modes, is formed and is tightly connected.
In the present embodiment, directly the gap between gradient coil 200 and body coil 300 is evacuated, to form vacuum
Separation layer 400, without other isolation structures are arranged so that the structure of MR imaging apparatus 001 is simpler compact, and same
When noise be significantly reduced.
In some other embodiment, sealing drum is equipped between gradient coil 200 and body coil 300, sealing drum has phase
To two barrels at interval, the space between two barrels can be evacuated, to form vacuum insulation layer 400.The present embodiment
In, a sealing barrel structure that can be vacuumized is set between gradient coil 200 and body coil 300, by the gradient coil 200
With 300 vacuum insulation of the body coil, the sound transmission approach between gradient coil 200 and body coil 300 is cut off, ladder is prevented
The noise transmission that degree switching generates is to body coil 300, to effectively reduce noise.
Referring to Fig. 1 and Fig. 2, another embodiment of the utility model additionally provides a kind of MR imaging apparatus, including gradient
Coil 200 and body coil 300 and separation layer (not shown)；Gradient coil 200 is equipped with along the axially extending receiving of gradient coil
Chamber 201, body coil 300 are installed in host cavity 201；Separation layer is set between gradient coil 200 and body coil 300, and adjacent
The end of nearly separation layer is equipped with pipeline or opening, and can will be vacuumized inside separation layer by the pipeline or opening, or passes through
The pipeline or opening can vacuumize the subregion inside separation layer.
In the present embodiment, separation layer is set between gradient coil 200 and body coil 300, by gradient coil 200 and body line
Sound transmission approach partition between circle 300, prevents the noise transmission that gradient switching generates to body coil 300, to effectively drop
Low noise.
Wherein, separation layer can be the vacuum insulation layer being evacuated completely inside it, pass through the pipeline of separation layer end
Or opening connection evacuator is realized and is vacuumized inside separation layer.Separation layer can also be that part is evacuated, and rest part can
Being filled by materials such as noise elimination cottons.
In other embodiments, separation layer can not also have the part being evacuated, but separation layer is all by eliminating the noise
The materials such as cotton are filled, as long as the purpose for blocking the sound transmission between gradient coil 200 and body coil 300 can be realized i.e.
It can.
In one embodiment, separation layer is cyclic structure, the separation layer of cyclic structure can with fully wrapped around body coil 300, from
And it is body coil 300 and gradient coil 200 is completely isolated.In addition, separation layer can be in direct contact with gradient coil 200.Or
Person's separation layer is arranged with the interval of gradient coil 200, such as some other knots can also be arranged between separation layer and gradient coil 200
Structure.
The MR imaging apparatus 001 that the utility model embodiment provides is in application, as shown in figure 3, magnetic resonance imaging is set
Standby 001 also typically includes magnetic resonance rack.There is main magnet 100 in magnetic resonance rack.Main magnet 100 can be by superconducting coil structure
At for generating main field.It is appreciated that main magnet 100 can also use permanent magnet in some cases.Main magnet 100 can
It is strong to be used for generating 0.2 tesla, 0.5 tesla, 1.0 teslas, 1.5 teslas, 3.0 teslas or higher main field
Degree.In magnetic resonance imaging, imaging object 500 can be carried by scanning bed 600, with the movement of bed board, by imaging object
500 move into main field Distribution of Magnetic Field more uniform imaging region 105.Generally for MR imaging apparatus 001, such as Fig. 3
Shown, the directions z of space coordinates (i.e. the coordinate system of equipment) are set as identical as the axial direction of rack, usually by the height of patient
Direction is consistent with the directions z and is imaged, and the horizontal plane of magnetic resonance equipment is set as xz planes, and the directions x are hung down with the directions z
Directly, the directions y are vertical with x and z directions.
In magnetic resonance imaging, pulse control unit 111 controls radio-frequency pulse and generates the generation radio-frequency pulse of unit 116, penetrates
After frequency pulse is amplified by amplifier, by switch control unit 117, finally sent out by body coil 300 or local coil 700,
Radio-frequency drive is carried out to imaging object 500.Imaging object 500 can generate corresponding radiofrequency signal according to radio-frequency drive by resonance.
When receiving the radiofrequency signal that imaging object 500 is generated according to excitation, can be by body coil 300 or local coil 700 into
Row receives, and after radio frequency reception link can have many items, radiofrequency signal to be sent to rf receiver unit 118, is further transmitted to
Image reconstruction unit 121 carries out image reconstruction, forms magnetic resonance image.
MR imaging apparatus 001 further includes gradient coil 200.Gradient coil 200 can be used in magnetic resonance imaging
Radiofrequency signal is spatially encoded.Pulse control unit 111 controls gradient signal and generates the generation gradient signal of unit 112.Ladder
Degree signal would generally be divided into the signal of three mutually orthogonal directions：The directions x, the directions y and the directions z, the gradient signal of different directions
It after gradient amplifier (113,114,115) amplification, is sent out by gradient coil 200, gradient magnetic is generated in imaging region 105
.
Pulse control unit 111, image reconstruction unit 121 and processor 122, display unit 123, input-output apparatus
124, can be carried out data transmission by communication bus 127 between storage unit 125, communication port 126, it is total to magnetic to realize
The control for imaging process of shaking.Wherein, processor 122 can be made of one or more processors.Display unit 123 can be carried
Supply user is used for showing the display of image.Input-output apparatus 124 can be that the correlations such as keyboard, mouse, control box are set
It is standby, support input/output respective stream of data.Storage unit 125 can be read-only memory (ROM), random access memory
(RAM), hard disk etc., storage unit 125, which can be used for storing, needs to handle and/or communicate the various data files used, and
Possible program instruction performed by processor.Communication port 126 may be implemented with other component for example：External equipment, image
Into row data communication between collecting device, database, external storage and image processing workstations etc..
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But therefore it can not be interpreted as the limitation to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of MR imaging apparatus, which is characterized in that including gradient coil and body coil and vacuum insulation layer；It is described
Gradient coil is equipped with along the axially extending host cavity of gradient coil, and the body coil is installed in the host cavity；
The vacuum insulation layer is set between the gradient coil and the body coil, for by the gradient coil with it is described
Body coil vacuum insulation.
2. MR imaging apparatus according to claim 1, which is characterized in that the gradient coil and the body coil it
Between be provided with sound insulation cylinder, between the sound insulation cylinder and the gradient coil have interval；The gradient coil and the sound insulation cylinder
Between interval can be evacuated, to form the vacuum insulation layer；
Or there is interval between the gradient coil and the body coil, and the interval can be evacuated, to be formed
State vacuum insulation layer.
3. MR imaging apparatus according to claim 2, which is characterized in that when the vacuum insulation layer is by the gradient
When interval between coil and the sound insulation cylinder is formed, the both ends of the gradient coil are both provided with the first connecting flange, institute
The both ends for stating sound insulation cylinder are both provided with the second connecting flange, each first connecting flange and corresponding second connection method
Langley is tightly connected with the first sealing plate.
4. MR imaging apparatus according to claim 3, which is characterized in that on the both ends end face of the gradient coil
Equipped with the first annular embedded groove through the end face of the gradient coil, first connecting flange is far from first sealing plate
One end be inserted in the first annular embedded groove.
5. MR imaging apparatus according to claim 3, which is characterized in that be all provided on the both ends end face of the sound insulation cylinder
Have the second annular embedded groove through the end face of the sound insulation cylinder, second connecting flange far from first sealing plate one
End is inserted in the described second annular embedded groove.
6. MR imaging apparatus according to claim 2, which is characterized in that when the vacuum insulation layer is by the gradient
When interval between coil and the body coil is formed, the both ends of the gradient coil are both provided with third connecting flange, institute
The both ends for stating body coil are both provided with the 4th connecting flange, each third connecting flange and corresponding 4th connection method
Langley is tightly connected with the second sealing plate.
7. MR imaging apparatus according to claim 6, which is characterized in that on the both ends end face of the gradient coil
Equipped with the third annular embedded groove through the end face of the gradient coil, the third connecting flange is far from second sealing plate
One end be inserted in the third annular embedded groove.
8. MR imaging apparatus according to claim 6, which is characterized in that be all provided on the both ends end face of the body coil
Have through the body coil end face fourth annular embedded groove, the 4th connecting flange far from second sealing plate one
End is inserted in the fourth annular embedded groove.
9. a kind of MR imaging apparatus, which is characterized in that including gradient coil and body coil and separation layer；The gradient
Coil is equipped with along the axially extending host cavity of gradient coil, and the body coil is installed in the host cavity；
The separation layer is set between the gradient coil and the body coil, and the end of the neighbouring separation layer is equipped with
Pipeline or opening, and can will be vacuumized inside the separation layer by the pipeline or opening, or can be incited somebody to action by the pipeline or opening
Subregion inside the separation layer vacuumizes.
10. MR imaging apparatus according to claim 9, which is characterized in that the separation layer is cyclic structure, and institute
It states separation layer and is in direct contact or is spaced setting with the gradient coil.
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| CN201721788295.9U CN207752130U (en) | 2017-12-19 | 2017-12-19 | MR imaging apparatus |
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| CN201721788295.9U CN207752130U (en) | 2017-12-19 | 2017-12-19 | MR imaging apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113702882A (en) * | 2021-07-15 | 2021-11-26 | 上海东软医疗科技有限公司 | Medical imaging apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113702882A (en) * | 2021-07-15 | 2021-11-26 | 上海东软医疗科技有限公司 | Medical imaging apparatus |
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