CN105816174A - Magnetic resonance device - Google Patents
Magnetic resonance device Download PDFInfo
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- CN105816174A CN105816174A CN201510008317.4A CN201510008317A CN105816174A CN 105816174 A CN105816174 A CN 105816174A CN 201510008317 A CN201510008317 A CN 201510008317A CN 105816174 A CN105816174 A CN 105816174A
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Abstract
The present invention provides a magnetic resonance device. The magnetic resonance device comprises a hollow magnet (20), and also comprises at least one track (21) and at least one support (22); each track (21) extends inside the magnet (20) in an axial direction of the magnet (20); and each support (22) comprises a first end (23) and a second end (24), the first end (23) is fixedly connected with the magnet (20), and the second end (24) is fixedly connected with the corresponding track (21). According to the magnetic resonance device provided by the embodiments, when a scanning table enters a magnetic resonance body coil, self weight of the scanning table and weight of a patient can be born by the magnet and are not born by the magnetic resonance body coil, so that the thickness of the magnetic resonance body coil can be manufactured to be thinner, the inner diameter of the magnetic resonance body coil can be greater when the inner diameter of the magnet is invariable, and therefore use comfortableness of the patient is improved and manufacturing cost is low.
Description
Technical field
The present invention relates to nuclear magnetic resonance (MagneticResonanceImaging is called for short MRI) technology, particularly relate to a kind of magnetic resonance equipment.
Background technology
MRI is to utilize atomic nucleus at a kind of imaging technique of the reconstructed rear imaging of signal produced by the internal resonance of magnetic field, and it, mainly by nuclear magnetic resonance principle, is detected the electromagnetic wave launched, draw out the structural images of interior of articles accordingly by additional gradient magnetic.
Specifically, nuclear magnetic resonance (MagneticResonanceImaging, MRI) is a kind of technology utilizing magnetic resonance phenomenon to carry out imaging.The principle of magnetic resonance phenomenon specifically includes that the atomic nucleus comprising odd number proton, the hydrogen nuclei being such as widely present in human body, its proton has spin motion, just as a small magnet, and the spin axis of these small magnets does not has certain rule, if applying exterior magnetic field, these small magnets will be rearranged by the magnetic line of force of exterior magnetic field, it is specially the both direction being either parallel or anti-parallel to the exterior magnetic field magnetic line of force to arrange, the above-mentioned direction being parallel to the exterior magnetic field magnetic line of force is referred to as positive longitudinal axis, the above-mentioned direction being antiparallel to the exterior magnetic field magnetic line of force is referred to as negative longitudinal axis；Atomic nucleus only has longitudinal magnetization component, and this longitudinal magnetization component not only has direction but also have amplitude.The atomic nucleus being in exterior magnetic field by radio frequency (RadioFrequency, the RF) pulse excitation of characteristic frequency, makes these nuclear spin axiss deviate positive longitudinal axis or negative longitudinal axis, produces resonance, here it is magnetic resonance phenomenon.After the above-mentioned nuclear spin axis being excited deviates positive longitudinal axis or negative longitudinal axis, this atomic nucleus is just provided with component of transverse magnetisation.
After stopping launching radio-frequency pulse, the atomic nucleus being excited launches echo-signal, being discharged the most in the form of an electromagnetic wave by the energy of absorption, its phase place and energy level all return to the state before exciting, and the echo-signal launched by atomic nucleus processes further through space encoding etc. can rebuild image.
Summary of the invention
The embodiment of the present invention provides a kind of magnetic resonance equipment, high in order to the manufacturing cost solving to bring because magnetic resonance body coil thickness larger interior diameter is less in prior art, easily gives the patient entered in the magnetic resonance body coil problem bringing constriction.
A first aspect of the present invention, it is provided that a kind of magnetic resonance equipment, including being hollow in a magnet, described magnet, wherein, described magnetic resonance equipment also includes at least one track and at least one support；
Described track extends inside described magnet along the axial of described magnet；
Described support includes one first end and one second end, and described first end is fixing with described magnet to be connected, and described second end is fixing with described track to be connected.
Magnetic resonance equipment as above, wherein, the end of described track includes that described open area is inserted in an open area, described second end.
Magnetic resonance equipment as above, wherein, described first end includes a carrier and a junction；Described connecting portion is connected with described carrier coupling, and described carrier is fixed on the end face of described magnet.
Magnetic resonance equipment as above, wherein, described magnetic resonance equipment also includes magnetic resonance body coil；Described magnetic resonance body coil is placed in the hollow region of described magnet, and described track is also connected with described magnetic resonance body coil.
Magnetic resonance equipment as above, wherein, the one end being connected with described support in described track is stretched out from described magnet.
The magnetic resonance equipment that the embodiment of the present invention provides, including being open area in magnet, magnet, magnetic resonance body coil is placed in the open area of magnet, and magnetic resonance equipment also includes at least one track and at least one support；Track extends inside magnet along the axial of magnet；Support includes one first end and one second end, and the first end is fixing with magnet to be connected, and the second end is fixing with track to be connected.In the magnetic resonance equipment that the embodiment of the present invention provides, track is not set directly on the inwall of magnetic resonance body coil, but fix with the second end of support and be connected, and the first end of support is fixedly connected on magnet, therefore, when scanning bed entrance magnetic resonance body coil, the weight of its deadweight and patient can be born by magnet, and not born by magnetic resonance body coil, thus hinge structure, it is less that the thickness of the magnetic resonance body coil in the present invention can make, and in the case of magnet inner diameter is constant, the internal diameter of magnetic resonance body coil is bigger, thus its low cost of manufacture, and comfort level when patient uses can be improved.
Accompanying drawing explanation
The preferred embodiments of the present invention will be described in detail by referring to accompanying drawing below, the person of ordinary skill in the art is more clear that the above and other feature and advantage of the present invention, in accompanying drawing:
Fig. 1 a is the front view of existing magnetic resonance equipment.
Fig. 1 b is the side view of existing magnetic resonance equipment.
The structural representation of a kind of magnetic resonance equipment that Fig. 2 a provides for the embodiment of the present invention one.
The structural representation of a kind of magnetic resonance equipment that Fig. 2 b provides for the embodiment of the present invention one.
The structural representation of a kind of hollow rail that Fig. 3 a provides for the embodiment of the present invention two.
A kind of hollow rail that Fig. 3 b provides for the embodiment of the present invention two and the structural representation of magnetic resonance body coil.
The partial structurtes schematic diagram of the magnetic resonance equipment that Fig. 4 a provides for the embodiment of the present invention two.
The partial structurtes schematic diagram of the magnetic resonance equipment that Fig. 4 b provides for the embodiment of the present invention two.
The partial structurtes schematic diagram of the magnetic resonance equipment that Fig. 4 c provides for the embodiment of the present invention two.
Wherein, reference is as follows:
10,20-magnets；11,25-magnetic resonance body coils；
12,26-is scanning bed；13,21-tracks；
14,22-supports；23-the first end；
24-the second end；230-carrier；
231-connecting portion.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, the present invention is described in more detail by the following examples.
Magnetic resonance equipment uses magnetic resonance body coil to launch and/or receives RF pulse signal, and this magnetic resonance body coil is mainly for generation of radio-frequency field.As illustrated in figs. ia and ib, wherein, Fig. 1 a is front view to the structure of existing magnetic resonance equipment, and Fig. 1 b is side view.This magnetic resonance equipment includes: magnet 10, magnetic resonance body coil 11, scanning bed 12, and track 13 and support 14.Concrete, support 14 is fixed on the outer surface of magnet 10, and magnetic resonance body coil 11 is fixed on magnet 10 by support 14, and the inwall of magnetic resonance body coil 11 is provided with track 13, this track 13, for making scanning bed the 12 of carrying patient move over, thinks imaging patients.Owing to track 13 is provided on the inwall of magnetic resonance body coil 10, therefore in side view 1b, do not show that track 13.
When imaging, owing to magnetic resonance body coil needs to bear the weight of scanning bed deadweight and patient, therefore, it is bigger that its thickness generally makes, it is typically to be determined by the concrete specification of gradient coil and magnet due to the external diameter of magnetic resonance body coil again, thus the internal diameter of magnetic resonance body coil can be caused smaller, but the problem so brought to be its manufacturing cost high, and bring constriction easily to the patient entered in magnetic resonance body coil.
Embodiment one
First, the structure of the magnetic resonance equipment of embodiments of the invention is described in detail.
The structural representation of a kind of magnetic resonance equipment that Fig. 2 a provides for the embodiment of the present invention one.As shown in Figure 2 a, this magnetic resonance equipment includes magnet 20, is hollow region in magnet 20, and this magnetic resonance equipment also includes at least one track 21 and at least one support 22.Wherein, track 21 extends along with the axial of magnet 20 from inside magnet 20, and support 22 includes one first end 23 and one second end 24, and this first end 23 is fixing with magnet 20 to be connected, and this second end 24 is fixing with track 21 to be connected.In order to the technical scheme of the present embodiment is clearly described, Fig. 2 a also show magnetic resonance body coil 25, generally, this magnetic resonance body coil 25 can be placed in the hollow region of magnet 20, Fig. 2 b furthermore present schematic diagram during scanning bed 26 entrance magnetic resonance body coil 25, this scanning bed 26 is used for carrying patient, and track 21 is the carrying support member of scanning bed 26, and scanning bed 26 can pass in and out magnetic resonance body coil 25 along track 21.
Concrete, the carrying support member that support 22 is track 21 of offer in the present invention.In practice, can respectively arrange a support 22 in the two of track 21 end, the first end 23 of each support 22 is all fixing with an end of track 21 to be connected, and the second end 24 is then fixedly connected on magnet 20.In fact, when one end that each support 22 is fixed on magnet 20 links together, they just constitute an integral support, this integral support is as parts, it includes the two ends that are connected fixing with track 21 respectively, these two ends are above-mentioned second end 24, and it is fixed on the one end on magnet 20, it is above-mentioned first end 23, the most only be described in detail as a example by support 22, integral support and magnet 20, and with the concrete connected mode of track 21, all identical with support 22, hereafter repeat no more.
Additionally, the concrete fixed form of support 22 and track 21 does not make restriction, such as: can be welded and fixed, be bolted, fixing all within protection scope of the present invention with the snap-in structure of setting on track 21 by support 22.
nullQuantity specific to track 21 and support 22 is arranged，In practice，The number of track 21 is typically more than or equal to the even number of 2，Now，Each track 21 can be distributed with the movement locus of the center of gravity of scanning bed 26 for axial symmetry，Correspondingly，The number of support 22 can be the even number more than or equal to 2，And match with the number of track 21，As previously described，If the two of track 21 ends respectively connect a support 22，Then the quantity of support 22 can be the twice of track 21，I.e. one the corresponding pair of brackets 22 of track 21，And if the support 22 being arranged on track 21 two ends is a global facility，Then the quantity of support 22 can be identical with track 21，I.e. one the corresponding support 22 of track 21，Such set-up mode is so that magnetic resonance body coil 25 is more uniformly stressed，Also scanning bed 26 are made more to balance during motion on track 21.It should be noted that the present invention only illustrates as a example by having two tracks 21, but it is not limited thereto and determines, the quantity of the concrete parts of design alternative can be carried out according to the actual requirements.Such as, generally, the number of track 21 can be 2, is separately positioned on the left and right sides of scanning bed 26, or is arranged on the both sides, bottom surface of scanning bed 26.Certainly, if the width of track 21 be enough to support scanning bed 26, it is also possible to arrange a track 21 in the lower section of scanning bed 26.It is understood that the quantity of track 21 and particular location can be arranged according to developed width and the weight of scanning bed 26, do not do too much restriction at this.
Additionally, each parts in Fig. 2 a and Fig. 2 b, such as: track 21, support 22 etc., its shape is example, and it is fixed to be not limited thereto, and can carry out the shape and size of the concrete parts of design alternative according to the actual requirements.
It can further be stated that, in the ordinary course of things, magnetic resonance body coil 25 can be fixed in the hollow region of magnet 20, and the present embodiment is intended merely to describe clear and introduce magnetic resonance body coil 25, is not limiting as the magnetic resonance body coil 25 concrete fixed form in the hollow region of magnet 20.
Secondly, the assembling process of the magnetic resonance equipment of embodiments of the invention is illustrated.
When assembling this magnetic resonance equipment, first track 21 can be passed magnetic resonance body coil 25, and support 22 is fixedly connected on magnet 20, then, magnetic resonance body coil 25 is placed in the hollow region of magnetic resonance equipment, afterwards, is connected fixing with support 22 for track 21.
In the magnetic resonance equipment that the embodiment of the present invention provides, track is not set directly on the inwall of magnetic resonance body coil, but fix with the second end of support and be connected, and the first end of support is fixedly connected on magnet, therefore, when scanning bed entrance magnetic resonance body coil, the weight of its deadweight and patient can be born by magnet, and not born by magnetic resonance body coil, thus hinge structure, it is less that the thickness of the magnetic resonance body coil in the present invention can make, and in the case of magnet inner diameter is constant, the internal diameter of magnetic resonance body coil is bigger, thus its low cost of manufacture, and comfort level when patient uses can be improved.
Embodiment two
Track that the present embodiment is described in detail in magnetic resonance equipment and the specific implementation of support and annexation.The structural representation of a kind of track that Fig. 3 a provides for the embodiment of the present invention two, a kind of track that Fig. 3 b provides for the embodiment of the present invention two and the structural representation of magnetic resonance body coil.Fig. 4 a～Fig. 4cThen show the partial structurtes schematic diagram of support and track coupling part.
Seeing Fig. 3 a, a kind of preferred implementation of track 21 is that its end can include open area, and under this detailed description of the invention, the second end 24 of support 22 may be inserted in the open area of track 21, and its first end 23 is then fixing with magnet 20 to be connected.Owing to the end of track 23 includes open area, thus its weight is less, and cost of manufacture is lower.
It should be noted that, the present embodiment only shows the schematic diagram of magnetic resonance equipment from front, it is true that at the back side of unshowned magnetic resonance equipment, i.e. in another end of track 21, open area can also be included, correspondingly, an also support 22, in the open area of another end that its second end 24 can also insert track 21, now, the front of magnetic resonance equipment and the support at the back side and the concrete connected mode of track and implementation are the most identical.The most only it is described in detail as a example by an end of track 21.Certainly, the present embodiment does not limit the size of the open area of track 21, and in practice, track 21 can directly be made as the track of hollow to alleviate its weight and cost of manufacture further.
As shown in Figure 3 b, track 21 can pass from magnetic resonance body coil 25, and when being scanned patient, can move along track 21, to pass in and out magnetic resonance body coil 25 in scanning bed the 26 of carrying patient.
Further, track 21 is in addition to can fixing with the second end 24 of support 22 being connected, it is also possible to be fitted and connected with magnetic resonance body coil 25.Wherein, track 21 and magnetic resonance body coil 25 can use glued connection, or the mode such as threaded or welding.It is connected owing to track 21 is both fixing with magnetic resonance body coil 25, fix with the second end 24 of support 22 again and be connected, therefore, when scanning bed 26 motion on track 21, the weight of its deadweight and patient can be by magnet 20 and magnetic resonance body coil 25 shared, without being born the deadweight of scanning bed 26 and the weight of patient completely by magnet 20, compared with prior art, this embodiment can alleviate the heavy burden of magnetic resonance body coil 25 to a certain extent, therefore, it is less that the thickness of magnetic resonance body coil 25 can make, such that it is able in the case of magnet 20 internal diameter is constant, the internal diameter of magnetic resonance body coil 25 is bigger, thus its low cost of manufacture, and comfort level when patient uses can be improved；And compared with the scheme being born all heavy burdens in the embodiment of the present invention one by magnet 20, this embodiment is relatively low to the hardness requirement of magnet 20, cost is lower, is also easier to realize.Under this enforcement scene, track 21 is referred to description above with the concrete connected mode of support 22, is not repeating at this.
On the basis of the connected mode of above-mentioned various tracks 21 and support 22, the one end being connected with the second end 24 of support 22 in track 21 can be stretched out from magnetic resonance body coil 25, so, when assembling this magnetic resonance equipment, track 21 stretches out the part of magnetic resonance body coil 25 and can be placed on support 22, therefore, when scanning bed 26 motion on track 21, the weight of its deadweight and patient can be stretched out the part of magnetic resonance body coil 25 by track 21 and is preferably transferred on support 22, and then be transferred on magnet 20, thus further alleviate the heavy burden of magnetic resonance body coil 25.
It should be noted that, shown in Fig. 3 b and Fig. 4 a～Fig. 4 c is all the combination of the optional embodiment of above two, will be connected with magnetic resonance body coil 25 by track 21, and stretch out from magnetic resonance body coil 25, certainly, in practice, one of which or two ways can be the most arbitrarily selected to implement.Additionally, when track 21 is connected with magnetic resonance body coil 25, support 22 is possible not only to supporting track 21, magnetic resonance body coil 25 can also be fixed on magnet 20 by it by the connection between track 21；And when track 21 is not connected with magnetic resonance body coil 25, support 22 is only used as the carrying support member of track 21, in this case, support 22 can be connected with magnetic resonance body coil 25 further, it is made also to become the carrying support member of magnetic resonance body coil 25, certainly, can be in the way of using as described in the prior art, such as with another group fixed support, magnetic resonance body coil 25 is fixedly installed in the open area of magnet 20, annexation between this fixed support and magnetic resonance body coil 25 is same as the prior art, and here is omitted.
Support 22 can be structure as a whole as described in embodiment one, it is also possible to is formed by connecting with upper-part by 2 or 2.Fig. 4 a～Fig. 4 c provides the one of support 22 preferred embodiment, and wherein, the first end 23 of this support 22 can include a carrier 230 and a junction 231.Wherein, connecting portion 231 is connected with carrier 230 coupling, and carrier 230 is fixed on the end face of magnet 20.When support 22 uses Split type structure to realize, preferably, can be using the second end 24 of above-mentioned connecting portion 231 and support 22 as " L " type parts of a global formation, and using the first end 23 of support 22 as another parts, as shown in Fig. 4 a～Fig. 4 c, wherein, connecting portion 231 and the second end 24 from each other can be in bending states, such as, connecting portion 231 and the second end 24 could be arranged to plate shaped, second end 24 can with connecting portion 231 at an angle, bend to the direction at track 21 place, so when assembling this magnetic resonance equipment, easily the second end 24 can be inserted in the open area of track 21.Generally, can be in 90 degree between the second end 24 and connecting portion 231, as shown in Fig. 4 a～Fig. 4 c, such structure is simpler, beneficially large-scale production manufacture.Certainly, if support 22 uses integrative-structure to realize, will above-mentioned carrier 230 and connecting portion 231 composition the first end 23 one-body molded with the second end 24, wherein, when carrier 230, concrete shape between connecting portion 231 and the second end 24 use Split type structure with support 22 identical, here is omitted.
For the concrete connected mode of above-mentioned parts, can weld or the mode such as threaded to use between carrier 230 with magnet 20, can be to use modes such as threadeding between the second end 24 and connecting portion 231, to facilitate adjustment and to dismantle.Can be interference fit between second end 24 and the open area of track 21 end of support 22, so coordinate tightr, be more conducive to be transferred on magnet 20 support 22 that is forced through of track 21.It should be noted that in practice, the length of the second end 24 of support 22 can determine according to the deadweight of scanning bed 26 and the average weight of patient, does not the most limit.
It is true that Fig. 4 a～Fig. 4 c can correspond to the partial structurtes of circle label 200 on the magnetic resonance equipment shown in Fig. 2 a, the part that simultaneously can also correspond to the oval label 201 on the magnetic resonance equipment shown in Fig. 2 b removes the partial structurtes after scanning bed 26.In fig .4, when carrier 230 and connecting portion 231 are released state, in Fig. 4 b and Fig. 4 c, carrier 230 and connecting portion 231 are assembled state.For simplicity, support 22 not shown in Fig. 4 a～Fig. 4 c.
The number of track 21 already mentioned above can have multiple choices, Fig. 3 a～Fig. 3 b, and Fig. 4 a～Fig. 4 c provides the enforcement scene that track 21 is two, correspondingly, the number of the support 22 mated with track 21 is 2, each support 22 a corresponding carrier 230 and the parts being made up of connecting portion 231 and the second end 24 respectively.Certainly, in practice, track 21 can also be one, and on the movement locus of the center of gravity that now track 21 can be arranged on scanning bed 26, the most scanning bed 26 along the axis in turnover magnetic resonance body coil 25 direction, to ensure the balance of scanning bed 26.
The cross section of the track 21 provided in Fig. 3 a and Fig. 3 b is triangular shape.Owing to magnetic resonance body coil 25 is all generally cylindrical, and triangle is more convenient for being connected on magnetic resonance body coil 25 track 21, and the two agrees with tightr.
In addition, manufacturing above-mentioned parts, such as: during track 21, fibre reinforced plastics (FiberReinforcePlastic can be used, it is called for short FRP) extruded method manufacture, the miscellaneous part that the present invention mentions, its concrete manufacture method can be same as the prior art, and here is omitted.
When assembling this magnetic resonance equipment, first track 21 can be passed magnetic resonance body coil 25, and carrier 230 is fixedly connected on the end face of magnet 20, then, magnetic resonance body coil 25 is placed in the open area of magnetic resonance equipment, afterwards, then the second end 24 of support 22 is inserted in the open area of track 21 end, and connect portion 231 and be connected with carrier 230.
Existing magnetic resonance body coil is owing to needing to bear the weight of scanning bed deadweight and patient, therefore, its thickness is generally more than 10 millimeters, and in the magnetic resonance equipment that the embodiment of the present invention provides, track is is connected fixing with the support being fixedly connected on magnet, or, track is fixing with magnetic resonance body coil the most further to be connected, therefore, when scanning bed move in orbit time, the weight of its deadweight and patient can be by magnet, or by magnet and magnetic resonance body coil shared, therefore, owing to the heavy burden of magnetic resonance body coil reduces, its thickness only needs 3～5 millimeters, so it is greatly lowered the manufacturing cost of magnetic resonance body coil, and, weight reduction about 50% due to magnetic resonance body coil, therefore, it is installed and safeguards and also becomes to be more prone to.Additionally, due to the external diameter of magnetic resonance body coil is generally relatively more fixing, therefore, reducing of magnetic resonance body coil thickness, in the case of magnet inner diameter is constant, can make the internal diameter of magnetic resonance body coil increase about 14 millimeters, and then the constriction of patient can be allowed to reduce, improve comfort level when patient uses.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any modification, equivalent substitution and improvement etc. made, should be included within the scope of the present invention.
Claims (7)
1. a magnetic resonance equipment, including a magnet (20), described magnet (20) is hollow, and wherein, described magnetic resonance equipment also includes at least one track (21) and at least one support (22)；
Described track (21) extends along the axial of described magnet (20) in described magnet (20) inside；
Described support (22) includes one first end (23) and one second end (24), described first end (23) is fixing with described magnet (20) to be connected, and described second end (24) is fixing with described track (21) to be connected.
Magnetic resonance equipment the most according to claim 1, wherein, the end of described track (21) includes that described open area is inserted in an open area, described second end (24).
Magnetic resonance equipment the most according to claim 1, wherein, described first end (23) includes a carrier (230) and a junction (231)；
Described connecting portion (231) is connected with described carrier (230) coupling, and described carrier (230) is fixed on the end face of described magnet (20).
4. according to the magnetic resonance equipment described in any one of Claims 2 or 3, wherein, described support is L-shaped.
5. according to the magnetic resonance equipment described in any one of claim 1-3, wherein, described magnetic resonance equipment also includes magnetic resonance body coil (25)；
Described magnetic resonance body coil (25) is placed in the hollow region of described magnet (20), and described track (21) is also fitted and connected with described magnetic resonance body coil (25).
6. the one end according to the magnetic resonance equipment described in any one of claim 1-3, wherein, being connected with described support (22) in described track (21) is stretched out from described magnet (20).
7. according to the magnetic resonance equipment described in any one of claim 1-3, wherein, the cross section of described track (21) is triangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510008317.4A CN105816174A (en) | 2015-01-08 | 2015-01-08 | Magnetic resonance device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510008317.4A CN105816174A (en) | 2015-01-08 | 2015-01-08 | Magnetic resonance device |
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| CN105816174A true CN105816174A (en) | 2016-08-03 |
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| CN201510008317.4A Pending CN105816174A (en) | 2015-01-08 | 2015-01-08 | Magnetic resonance device |
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| CN108303662A (en) * | 2018-02-10 | 2018-07-20 | 奥泰医疗系统有限责任公司 | MRI body coil construction packages |
| CN113056237A (en) * | 2018-11-28 | 2021-06-29 | 汉阳大学校产学协力团 | Magnetic field driving system |
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