CN106856654B - Self-shielding type magnetic resonance device - Google Patents

Self-shielding type magnetic resonance device Download PDF

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Publication number
CN106856654B
CN106856654B CN201710144506.3A CN201710144506A CN106856654B CN 106856654 B CN106856654 B CN 106856654B CN 201710144506 A CN201710144506 A CN 201710144506A CN 106856654 B CN106856654 B CN 106856654B
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CN
China
Prior art keywords
hole
magnet
shielding
screening arrangement
magnetic resonance
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Active
Application number
CN201710144506.3A
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Chinese (zh)
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CN106856654A (en
Inventor
程永辉
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Shenzhen Jinshi Medical Technology Co Ltd
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Shenzhen Jinshi Medical Technology Co Ltd
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Priority to CN201710144506.3A priority Critical patent/CN106856654B/en
Publication of CN106856654A publication Critical patent/CN106856654A/en
Priority to PCT/CN2018/078303 priority patent/WO2018166387A1/en
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K9/00Screening of apparatus or components against electric or magnetic fields
    • H05K9/0007Casings
    • H05K9/0015Gaskets or seals
    • H05K9/0016Gaskets or seals having a spring contact

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)

Abstract

The present invention relates to field of magnetic resonance imagings, in particular to self-shielding type magnetic resonance device, including magnet, preceding screening arrangement and rear screening arrangement, the magnet includes the first end and second end being oppositely arranged, the preceding screening arrangement is set to first end, screening arrangement is set to second end after described, and the preceding screening arrangement and the rear screening arrangement include waveguide channels.The self-shielding type magnetic resonance device includes waveguide channels in preceding screening arrangement and rear screening arrangement by the way that preceding screening arrangement and rear screening arrangement is arranged at the both ends of magnet, together forms complete radio shielding system.

Description

Self-shielding type magnetic resonance device
[technical field]
The present invention relates to field of magnetic resonance imagings, in particular to self-shielding type magnetic resonance device.
[background technique]
In field of magnetic resonance imaging, external interference signal can have adverse effect on scanning imagery.Therefore, in order to shield External interference signal needs additionally to establish a screened room.Such screened room building course is very long, occupied area is huge and cost Valuableness considerably increases the use cost of equipment, and unless otherwise specified, " shielding " herein refers in particular to " radio shielding ".
[summary of the invention]
In order to overcome the above problem, the present invention proposes a kind of novel self-shielding type magnetic resonance device.
The present invention solves a kind of technical solution that above-mentioned technical problem provides: providing a kind of self-shielding type magnetic resonance dress It sets, including magnet, preceding screening arrangement and rear screening arrangement, the magnet includes the first end and second end being oppositely arranged, described Preceding screening arrangement is set to first end, and the rear screening arrangement is set to second end, the preceding screening arrangement and the rear shielding Device includes waveguide channels.
Preferably, the first end of the magnet is provided with a first through hole, and the first end is along the first through hole Periphery extends outward to form a flange, between the flange and the preceding screening arrangement filled with flexible shielding material be formed with it is soft Property shielded layer is to realize the radio shielding of first end.
Preferably, the preceding screening arrangement includes support frame, rotary components and movable component, and the support frame is fixed on institute The first end of magnet is stated, the movable component is rotationally connected with the support frame by the rotary components.
Preferably, the support frame corresponds to the first through hole and is provided with the second through-hole, and second through-hole includes internal diameter Not equal first part and second part, so that forming step-like configuration between the first part and second part, and first The gradient difference of part and second part is equal to the thickness of the flange.
Preferably, the support frame is provided with a border groove around second through-hole far from described magnet one end.
Preferably, the support frame is additionally provided with several first grooves, first groove two far from described magnet one end End is respectively communicated with second through-hole far from magnet one end and the external world.
Preferably, the movable component includes folding main body, is provided with the second groove in the folding main body, and described second The setting of first groove described in groove face, when movable component is covered on the support frame, first groove and described second Groove forms waveguide channels.
Preferably, the movable component includes folding main body, and the folding main body includes a third through-hole, and the third is logical Hole is provided with Transparent Parts far from described magnet one end, and the Transparent Parts seal the third through-hole, embedding inside the Transparent Parts There are one layer, two or more layers shielded layer, to realize that good shield effectiveness, the edge of transparent are extended a conductive layer, Electrical connection of the conductive layer to realize the shielded layer and the folding main body.
Preferably, the folding main body further includes being set to the folding main body close to the shielding group of the magnet side Part, the shield assembly include several shielding parts, and several shielding parts are arranged around the third through-hole, form an encirclement The shielding ring of the third through-hole, the shielding part is elastic shielding part, when the movable component is covered on the support frame, institute Shield assembly is stated to be embedded into the border groove.
Preferably, the magnet second end is provided with several cable fairleads, and the rear screening arrangement includes a mask frame And several shielded-plate tubes, several cable fairleads, one group of air inlet, one group of air outlet and Transparent Parts are provided in the mask frame, Several shielded-plate tubes are inserted into the cable fairlead of magnet second end and the cable fairlead of mask frame, and the shielded-plate tube is inserted The one end entered into the cable fairlead of magnet second end and mask frame is provided with conductive layer and/or shielded layer, to realize shielding The electrical connection of pipe and cable fairlead, the air inlet and the air outlet are made of several waveguide channels.
Compared with prior art, the self-shielding type magnetic resonance device by the both ends of magnet be arranged before screening arrangement and Screening arrangement afterwards forms flexible shielding layer, elastic shielding part and the cooperation of border groove using flexible shielding material and realizes circumferential screen It covers, Transparent Parts include that shielded layer realizes axial shield, in addition, it is logical to be each formed with waveguide in preceding screening arrangement and rear screening arrangement Road completes the radio shielding of magnetic resonance device with the shielded layer of flexible shielding layer, elastic shielding part, Transparent Parts jointly.
[Detailed description of the invention]
Fig. 1 is the schematic perspective view of self-shielding type magnetic resonance device of the present invention;
Fig. 2 is the another schematic perspective view of self-shielding type magnetic resonance device of the present invention;
Fig. 3 is the partial cutaway schematic of self-shielding type magnetic resonance device of the present invention;
Fig. 4 is the partial enlargement diagram of part A in Fig. 3;
Fig. 5 is the structural schematic diagram of the support frame of self-shielding type magnetic resonance device of the present invention;
Fig. 6 is the structural schematic diagram of the movable component of self-shielding type magnetic resonance device of the present invention;
Fig. 7 is that the movable component lid of self-shielding type magnetic resonance device of the present invention closes the diagrammatic cross-section on support frame;
Fig. 8 is the partial enlargement diagram of part B in Fig. 7;
Fig. 9 is the partial enlargement diagram of C portion in Fig. 7;
Figure 10 is the structural schematic diagram of the rotary components of self-shielding type magnetic resonance device of the present invention;
Figure 11 is the rear screening arrangement structural schematic diagram of self-shielding type magnetic resonance device of the present invention;
Figure 12 is the partial profile structure of the rear screening arrangement of self-shielding type magnetic resonance device of the present invention.
[specific embodiment]
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing and embodiment, The present invention will be described in further detail.It should be appreciated that described herein, the specific embodiments are only for explaining the present invention, and It is not used in the restriction present invention.
It is to be appreciated that in the embodiment of the present invention institute it is directional instruction (such as up, down, left, right, before and after, it is interior, It is only limitted to the relative position in given view outside ...), rather than absolute position.
In addition, the description for being such as related to " first ", " second " in the present invention is used for description purposes only, and should not be understood as Its relative importance of indication or suggestion or the quantity for implicitly indicating indicated technical characteristic.Define as a result, " first ", The feature of " second " can explicitly or implicitly include at least one of the features.In the description of the present invention, " multiple " contain Justice is at least two, such as two, three etc., unless otherwise specifically defined.
Referring to Fig. 1, the present invention provides a kind of self-shielding type magnetic resonance device 100 comprising magnet 10, preceding screening arrangement 20 and rear screening arrangement 30, the magnet 10 includes the first end 11 and second end 13 being oppositely arranged, the preceding screening arrangement 20 It is set to first end 11, first end 11 is set to second end 13, second end 13 close to scanning bed setting, the rear screening arrangement 30 To connection cables, sealed by the rear screening arrangement 30.
The first end 11 of the magnet 10 is provided with a first through hole 15, and the first end 11 is along the first through hole 15 Periphery extended outward to form a flange 17, between the flange 17 and the preceding screening arrangement 20 be filled with flexible shielding material Material is formed with flexible shielding layer 19, to realize the shielding of first end 11.Such as it can be, the flange 17 and/or preceding shielding dress It sets 20 joints and is provided with an annular channel, filling flexible shielding material in annular channel.
Please continue to refer to Fig. 2, the preceding screening arrangement 20 includes support frame 21, rotary components 23 and movable component 25, institute The first end 11 that support frame 21 is fixed on the magnet 10 is stated, the movable component 25 is rotatablely connected by the rotary components 23 In the support frame 21.Specifically, the corresponding first through hole 15 of the support frame 21 is provided with the second through-hole 211, and described the Two through-holes 211 include the first part 2111 and second part 2113 that internal diameter does not wait, so that the first part 2111 and second Step-like configuration is formed between part 2113, and the gradient difference of first part 2111 and second part 2113 is equal to the flange 17 Thickness.The flange 17 is contained in the first part 2111 and is connected to second part 2113, and flexible shielding material is filled out It fills between the inner wall and the flange 17 of the first part 2111, the internal diameter of the second part 2113 is equal to described first The internal diameter of through-hole 15.
Fig. 3 to Fig. 5 is please referred to, the support frame 21 is arranged far from described 10 one end of magnet around second through-hole 211 There is a border groove 213, for cooperating with component corresponding in movable component 25 to be shielded to circumferential formed of the second through-hole 211, 21 side of support frame extends outward to form two connecting columns 215, and the connecting column 215 offers turn hole, and the turn hole is Blind hole, the rotary components 23 partially protrude into the turn hole.The support frame 21 side opposite with the connecting column 215 Lock chambers 217 are provided with, the lid of movable component 25, which is closed, to be locked with when the support frame 21 by the lock chambers 217.It is described Lock chambers 217 are arranged in 213 outside of border groove, close to 21 edge of support frame.
The lock chambers 217 include sealed chamber and a lockhole 2171, and the sealed chamber is an inner cavity of the support frame, and It is in communication with the outside by the lockhole 2171, the lockhole 2171 is substantially in long and narrow cross.
The support frame 21 is additionally provided with several first grooves 219, first groove 219 far from described 10 one end of magnet Both ends are respectively communicated with 10 one end of separate magnet and the external world (air) of second through-hole 211.The border groove 213 crosses The first adjacent groove 219 is connected to by first groove 219, and the depth of first groove 219 is recessed less than the border The depth of slot 213.
Please continue to refer to Fig. 6 to Fig. 9, the movable component 25 includes folding main body 251, knob lock 253 and drive-connecting shaft 255, the knob lock 253 relies on the folding main body 251 with the drive-connecting shaft 255 and is arranged, and the drive-connecting shaft 255 is arranged In 251 side of folding main body, the corresponding connecting column 215 is arranged, and the distance between two described connecting columns 215 are substantially etc. In the length of the drive-connecting shaft 255, it is opposite with the drive-connecting shaft 255 that the knob lock 253 is set to the folding main body 251 Side.
The drive-connecting shaft 255 is provided with turn hole, and rotary components 23 extend into the turn hole and the switching of the drive-connecting shaft 255 In the turn hole of column 215, the turn hole of the drive-connecting shaft 255 can be the through-hole through 255 length direction of drive-connecting shaft, can also be with It is the blind hole for being set to 255 both ends of drive-connecting shaft, it will be understood that when the turn hole of the drive-connecting shaft 255 is through-hole, described turn Hole is only arranged one, and when being blind hole, then a turn hole is respectively arranged in the drive-connecting shaft both ends.
The folding main body 251 includes a third through-hole 2511, and the third through-hole 2511 is far from described 10 one end of magnet Transparent Parts 2513 are provided with, the Transparent Parts 2513 seal the third through-hole 2511, and the Transparent Parts 2513, which also have, penetrates Frequency function of shielding, specifically, the Transparent Parts 2513 include one layer, two or more layers shielded layer, and the shielded layer is embedded in institute It states inside Transparent Parts 2513, to realize good shield effectiveness, 2513 edge of Transparent Parts is extended a conductive layer, described Conductive layer realizes the electrical connection of the shielded layer and the folding main body 251.
The folding main body 251 further includes shield assembly 2515, and the shield assembly 2515 is set to the folding main body 251 close to 10 side of magnet, and is arranged around the third through-hole 2511, and the shield assembly 2515 includes several shieldings Part, several shielding parts are arranged around the third through-hole 2511, form the shielding ring for surrounding the third through-hole, institute Shield assembly 2515 is stated to match with the border groove 213.The shielding part is elastic shielding part, when the movable component 25 When being covered on the support frame 21, the shield assembly 2515 is embedded just below in the border groove 213, to realize second The shielding of 211 circumferential direction of through-hole.
Several second grooves 2517 are additionally provided in the folding main body 251, described in 2517 face of the second groove The setting of one groove 219, when movable component 25 is covered on the support frame 21, first groove 219 and second groove 2517 collectively form several waveguide channels, and when radiofrequency signal passes through waveguide channels, radiofrequency signal is logical with the waveguide that deepens continuously Road and constantly decay, finally decay to magnetic resonance device using unobstructive weaker signal, to realize radio shielding.It is described Second groove 2517 is connected to third through-hole and the external world.
The knob lock 253 is rotary switch, including lock (figure is not marked) and knob (figure is not marked), the lock and institute It is corresponding to state lockhole, is in long and narrow cross, when needing to close, presses knob, is rotating by a certain angle so that lock enter it is sealed Chamber, and be engaged, closing process is completed, opening process is in contrast.
The rotary components 23 include rotary shaft 231, and 231 outer application of rotary shaft has damping grease, so that the rotation When shaft 231 rotates in the turn hole of the drive-connecting shaft 255 and the connecting column 215, there is certain resistance, to make described Movable component 25 can the support frame 21 folding relatively dock at any angle.When the turn hole of the drive-connecting shaft 255 is through-hole When, the rotary shaft 231 is passed through from the turn hole of the drive-connecting shaft, and both ends are respectively protruding into the turn hole of the connecting column 215, At this time that the both ends of the rotary shaft 231 are fixed with the connecting column 215 respectively, movable component 25 is in folding, movable component 25 rotate relative to the rotary shaft 231.
Preferably, the nothing that the support frame 21, the rotary components 23 and the folding main body 251 are needed by meeting shielding Magnetic is made close to the material without magnetic.
The preceding screening arrangement 20 passes through the border groove 213 and the shielding group around the third through-hole 2511 setting Part 2515 realizes first through hole 15 in the shielding of circumferential direction and realizes axial direction side by the way that shielded layer is arranged in Transparent Parts 2513 To shielding, in addition, several waveguide channels that several first grooves 219 and several second grooves 2517 are formed are also real Radio shielding is showed.
Figure 10 to Figure 11 is please referred to, 10 second end 13 of magnet is provided with several cable fairleads, shields dress after described Setting 30 includes a mask frame 31 and several shielded-plate tubes, and the mask frame 31 is similar with the fixation of 10 second end 13 of magnet with institute The fixation of support frame 21 Yu 10 first end 11 of magnet is stated, the second end 13 of the magnet 10 offers fourth hole and ring The fourth hole is provided with the second flange, is also equipped with flexible shielding material between the mask frame and second flange Material.
Be provided in the mask frame 31 311, one groups of several cable fairleads, 313, one groups of air inlet air outlet 315 and thoroughly Bright part, several shielded-plate tubes are inserted into the cable fairlead of magnet second end and the cable fairlead of mask frame, the screen It covers one end that pipe is inserted into the cable fairlead of magnet second end and mask frame and is provided with conductive layer or shielded layer, to realize screen The electrical connection of pipe Yu cable fairlead is covered, the air inlet 313 and the air outlet 315 are made of several waveguide channels.
The Transparent Parts are identical as the Transparent Parts of the preceding screening arrangement 20, for the Transparent Parts for being embedded with shielded layer.
The shielded-plate tube is extend into the cable fairlead to draw the cable of the self-shielding type magnetic resonance device 100 Out, cable is housed in the shielded-plate tube.
Preferably, the mask frame 31, the shielded-plate tube are by satisfaction shielding needs without magnetic or the close material system without magnetic At.
It, will be to be scanned when being scanned using the self-shielding type magnetic resonance device 100 for animal to be imaged Animal it is firm be placed in scanning bed upper and in narcosis, need the monitoring with anesthesia tube, oxygen hose and vital sign Device.It is assumed herein that the closure of movable component 25 is original state, operator will operate according to the following steps:
The first step unlocks knob lock 253, keeps movable component 25 in the open state, and allow movable component 25 stablize at In a suitable position;
Scanning bed the second through-hole 211 by supporting frame 21 is sent into 10 suitable location within of magnet by second step;
Third step, by anesthesia tube, oxygen hose etc., other tubes are placed in the first groove 219 of supporting frame 21;
4th step closes movable component 25, and locking knob lock 253.
At this point, the elastic shielding part in movable component 25 is tightly contacted with 213 inner wall of border groove of supporting frame 21;Folding The second groove 2517 on component 25 collectively forms gallery with the first groove 219 on supporting frame 21, forms waveguide, into One step makes magnet 10 be in masked state.Animal to be scanned is scanned at this point, relevant device can be started.Entirely sweeping During retouching, related personnel can observe 10 inner case of magnet by Transparent Parts.
Compared with prior art, the self-shielding type magnetic resonance device 100 passes through the shielding dress before the both ends of magnet are arranged 20 and rear screening arrangement 30 are set, flexible shielding material formation flexible shielding layer, elastic shielding part and border groove 213 is adopted and cooperates reality Now circumferential shielding, Transparent Parts include that shielded layer realizes axial shield, in addition, in preceding screening arrangement 20 and the equal shape of rear screening arrangement 30 At there are waveguide channels, the radio frequency of magnetic resonance device is completed jointly with the shielded layer of flexible shielding layer, elastic shielding part, Transparent Parts Shielding.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the scope of the invention, all at this Made any modification within the design of invention, equivalent replacement and improvement etc. should be included in scope of patent protection of the invention It is interior.

Claims (8)

1. self-shielding type magnetic resonance device, which is characterized in that including magnet, preceding screening arrangement and rear screening arrangement, the magnet Including the first end and second end being oppositely arranged, the preceding screening arrangement is set to first end, and the rear screening arrangement is set to Second end, the preceding screening arrangement and the rear screening arrangement include waveguide channels;The size and depth of the waveguide channels Meet when radiofrequency signal passes through waveguide channels, radiofrequency signal constantly decays with waveguide channels are deepened continuously, final to decay To use unobstructive signal to magnetic resonance device;
The first end of the magnet is provided with a first through hole, and the first end extends outwardly along the periphery of the first through hole A flange is formed, is formed with flexible shielding layer filled with flexible shielding material between the flange and the preceding screening arrangement with reality The radio shielding of existing first end;
The preceding screening arrangement includes support frame, rotary components and movable component, and the support frame is fixed on the of the magnet One end, the movable component are rotationally connected with the support frame by the rotary components.
2. self-shielding type magnetic resonance device as described in claim 1, which is characterized in that it is logical that the support frame corresponds to described first Hole is provided with the second through-hole, and second through-hole includes internal diameter not equal first part and second part, so that described first Divide and form step-like configuration between second part, and the gradient difference of first part and second part is equal to the thickness of the flange Degree.
3. self-shielding type magnetic resonance device as claimed in claim 2, which is characterized in that the support frame is far from the magnet one End ring is provided with a border groove around second through-hole.
4. self-shielding type magnetic resonance device as claimed in claim 3, which is characterized in that the support frame is far from the magnet one End is additionally provided with several first grooves, and first groove both ends are respectively communicated with second through-hole far from magnet one end and outer Boundary.
5. self-shielding type magnetic resonance device as claimed in claim 4, which is characterized in that the movable component includes folding master Body is provided with the second groove, the setting of the first groove described in the second groove face, when movable component lid in the folding main body When together in the support frame, first groove and second groove form waveguide channels.
6. self-shielding type magnetic resonance device as claimed in claim 3, which is characterized in that the movable component includes folding master Body, the folding main body include a third through-hole, and the third through-hole is provided with Transparent Parts far from described magnet one end, described Bright part seals the third through-hole, one layer, two or more layers shielded layer is embedded with inside the Transparent Parts, to realize good screen Effect is covered, the edge of transparent is extended a conductive layer, and the conductive layer is to realize the shielded layer and the folding The electrical connection of main body.
7. self-shielding type magnetic resonance device as claimed in claim 6, which is characterized in that the folding main body further includes being set to The folding main body is close to the shield assembly of the magnet side, and the shield assembly includes several shielding parts, several screens Shield is arranged around the third through-hole, forms the shielding ring for surrounding the third through-hole, and the shielding part is flexible screen Shield, when the movable component is covered on the support frame, the shield assembly is embedded into the border groove.
8. self-shielding type magnetic resonance device as described in claim 1, which is characterized in that the magnet second end is provided with several Cable fairlead, the rear screening arrangement includes a mask frame and several shielded-plate tubes, is provided with several cables in the mask frame Fairlead, one group of air inlet, one group of air outlet and Transparent Parts, the cable that several shielded-plate tubes are inserted into magnet second end are drawn In the cable fairlead of hole and mask frame, the shielded-plate tube is inserted into one in the cable fairlead of magnet second end and mask frame End is provided with conductive layer and/or shielded layer, to realize the electrical connection of shielded-plate tube Yu cable fairlead, the air inlet and described Air outlet is made of several waveguide channels.
CN201710144506.3A 2017-03-13 2017-03-13 Self-shielding type magnetic resonance device Active CN106856654B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201710144506.3A CN106856654B (en) 2017-03-13 2017-03-13 Self-shielding type magnetic resonance device
PCT/CN2018/078303 WO2018166387A1 (en) 2017-03-13 2018-03-07 Self-shielding type magnetic resonance apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710144506.3A CN106856654B (en) 2017-03-13 2017-03-13 Self-shielding type magnetic resonance device

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CN106856654A CN106856654A (en) 2017-06-16
CN106856654B true CN106856654B (en) 2019-08-02

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106856654B (en) * 2017-03-13 2019-08-02 深圳市金石医疗科技有限公司 Self-shielding type magnetic resonance device
CN108547557B (en) * 2018-06-21 2023-11-10 深圳市金石医疗科技有限公司 Flexible radio frequency shielding door and magnetic resonance equipment

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CN102037528A (en) * 2008-03-20 2011-04-27 格瑞巴奇有限公司 Shielded three-terminal flat-through EMI/energy dissipating filter
CN101559259A (en) * 2009-05-26 2009-10-21 西安航天动力机械厂 Radioactive source shielding device
CN105664378A (en) * 2009-07-15 2016-06-15 微雷公司 Method and apparatus for shielding a linear accelerator and a magnetic resonance imaging device from each other
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