CN104777441A - Noise reduction device of nuclear magnetic resonance imaging system - Google Patents
Noise reduction device of nuclear magnetic resonance imaging system Download PDFInfo
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- CN104777441A CN104777441A CN201510229627.9A CN201510229627A CN104777441A CN 104777441 A CN104777441 A CN 104777441A CN 201510229627 A CN201510229627 A CN 201510229627A CN 104777441 A CN104777441 A CN 104777441A
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- magnetic resonance
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- resonance imaging
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Abstract
The invention discloses a noise reduction device of a nuclear magnetic resonance imaging system. The noise reduction device comprises a shell. A body coil system is arranged on the shell or in the shell. A gradient coil system is arranged outside the body coil system. A superconducting magnet system is arranged outside the gradient coil system. Damping sound insulation structures are arranged on the inner surface of the superconducting magnet system, and the inner surface and the outer surface of the gradient coil system respectively. The superconducting magnet system and the gradient coil system are both arranged in the shell. The nuclear magnetic resonance noise reduction device is simple, efficient, simple in structure and low in cost, and can effectively reduce the sound pressure level between a patient cavity and the magnet, relieve anxiety of the patient and protect the hearing of the patient.
Description
Technical field
The present invention relates to a kind of Medical Devices, particularly relate to a kind of nuclear magnetic resonance imaging system denoising device.
Background technology
In nuclear magnetic resonance imaging system, gradient coil is under the acting in conjunction of pulse current and B0 field, wide band mechanical vibration will be produced, the mechanical vibration of gradient coil are delivered on magnet and other parts by mechanical fastener, cause the vibration of whole magnet system, produce the noise of more than 100 decibels with mechanical vibration, out-of-control noise will cause the hearing of the Anxiety of patient injured patient, therefore need the noise taking measures to control NMR system.
During scanning, people's ear is in region certain in NMR system, and the main target of noise reduction reduces the sound pressure level in this region; Have active noise reduction and passive noise reduction two kinds of modes at present, active noise reduction produces the reverse sound wave equal with ambient noise by noise reduction system, is neutralized by noise, thus realizes the effect of noise reduction; There is the active noise reduction earphone for NMR system at present, excellent noise reduction effect, but expensive, be difficult to apply; Passive noise reduction, mainly through sound-absorbing acoustic construction, reduces the sound pressure level in patient chamber and between magnet.CN101796425A discloses the double wall that one utilizes body coil (antenna carrier 5) and shell (lid) to form and hinders sonic propagation of making an uproar, and this method increases the design difficulty of body coil; CN103018691A discloses the vibration noise that a kind of method by increasing damping layer between superconducting magnet assembly 1 and gradient coil assembly 2 reduces gradient coil, but spiral pipe described in it needs sealing, and need configure a set of pressure-retaining system, implements more difficult.
More external documents and patent discloses a kind of by vacuum-packed for gradient coil method, intercept the transmission of acoustic pressure, noise reduction is remarkable; But it is large that this method implements difficulty, system complex.
Summary of the invention
The present invention aims to provide a kind of simple, efficient nuclear magnetic resonance noise reduction system, and effectively can reduce the sound pressure level in patient chamber and magnet, alleviate the Anxiety of patient, the hearing of protection patient, structure is simple, and cost is low.
For achieving the above object, the present invention realizes by the following technical solutions:
Nuclear magnetic resonance imaging system denoising device disclosed by the invention, comprise housing, on the housing or enclosure interior be provided with body coil system, described body coil system arranged outside has gradient coil system, described gradient coil system arranged outside has superconducting magnet system, described superconducting magnet system inner cylindrical surface, the inside and outside surface of gradient coil system all arrange damping sound insulation structure, and superconducting magnet system, gradient coil system are all positioned at enclosure interior.
Gradient coil system is under the acting in conjunction of gradient current and B0 field, wide band mechanical vibration will be produced, gradient coil vibration causes its ambient air to vibrate and produces noise, the vibration of gradient coil is simultaneously delivered on superconducting magnet system with in body coil system by mechanical connection, cause the vibration of whole MRI system, and then produce noise; Damping sound insulation structure is arranged on superconducting magnet system inside surface, in order to reduce and to eliminate the vibration & noise of superconducting magnet system inside surface; Damping sound insulation structure is arranged in the both side surface of gradient coil system, in order to reduce and to eliminate the vibration & noise of gradient coil system;
Preferably, gap is left between described body coil system and the inwall of housing.Body coil system is wrapped in enclosure; Shell has a closed cavity of one's own, and noise insulation is to the transmission of people's ear position.
Preferably, described housing has breach, and described body coil system is arranged in breach.Body coil system and shell form a closed cavity, and noise insulation is to the transmission of people's ear position.
Further, described housing inner wall section or all cover sound absorbing layer.Play the effect reducing noise in housing, tentatively test, the noise reduction of sound absorbing layer is about 10dBA ~ 15dBA, can expect that overall noise reduction gets over 15dBA ~ 20dBA.
Preferably, described damping sound insulation structure is made up of sound-proof material and damping layer.Adopt the larger sound-proof material of density, play the double action absorbing superconducting magnet system, gradient coil system vibrational energy and sound insulation.
Preferably, described damping sound insulation structure is for being sheet-type or sheet type.
Preferably, described damping layer and superconducting magnet system inner cylindrical surface, the inside and outside surface of gradient coil system are bonding.
Further, between the magnet of described casing surroundings wall inwall on be provided with sound-absorbing structure.The noise of between further reduction magnet and people's ear position; Effectively can reduce the sound pressure level in magnet
Preferably, described sound-absorbing structure comprises sound absorption cavity and/or acoustical cotton.
The noise reduction system that the present invention uses damping layer, sound-absorbing structure, sound-absorbing acoustic construction to form, effectively reduces the sound pressure level in patient chamber and magnet, alleviates the Anxiety of patient, the hearing of protection patient; Simple efficient, with low cost.
Accompanying drawing explanation
Fig. 1 is the cut-open view of embodiment 1;
Fig. 2 is the cut-open view of embodiment 2;
Fig. 3 is the schematic diagram that the present invention uses situation;
In figure: wall, 8-sound-absorbing structure between 1-superconducting magnet system, 2-gradient coil system, 3-body coil system, 4-damping sound insulation structure, 5-sound absorbing layer, 6-housing, 7-magnet.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with accompanying drawing, the present invention is further elaborated.
Embodiment 1
As shown in Figure 1, nuclear magnetic resonance imaging system denoising device disclosed by the invention, comprise housing 6, the inner wall section of housing 6 or whole covering sound absorbing layer 5, housing 6 inside is provided with body coil system 3, gap is left between the inwall of body coil system 3 and housing 6, body coil system 3 arranged outside has gradient coil system 2, gradient coil system 2 arranged outside has superconducting magnet system 1, the inner cylindrical surface of superconducting magnet system 1, in gradient coil system 2, outside surface all arranges damping sound insulation structure 4, between body coil system 3 and gradient coil system 2, damping sound insulation structure 4 is provided with between gradient coil system 2 and superconducting magnet system 1, damping sound insulation structure 4 is made up of sound-proof material and damping layer overlap, sound-proof material adopts the material that density is larger, damping sound insulation structure is for being sheet-type or sheet type, and damping layer is bonding with the inside and outside surface of superconducting magnet system 1 inner cylindrical surface, gradient coil system 2.
Embodiment 2
As shown in Figure 2, embodiment 2 is with the difference of embodiment 1: offer the breach suitable with body coil system 3 on the surface of housing 6, be arranged in breach by body coil system 3, make body coil system 3 become a part for housing 6.
Other parts of embodiment 2 are identical with embodiment 1, therefore do not repeat.
As shown in Figure 3, when reality uses, body coil system 3 close to people's ear position, between the magnet around housing 6 wall 7 inwall on sound-absorbing structure 8 is set, sound-absorbing structure 8 can comprise in sound absorption cavity or acoustical cotton etc. one or more.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art can make various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection domain that all should belong to the claim appended by the present invention.
Claims (9)
1. a nuclear magnetic resonance imaging system denoising device, it is characterized in that: comprise housing, on the housing or enclosure interior be provided with body coil system, described body coil system arranged outside has gradient coil system, described gradient coil system arranged outside has superconducting magnet system, described superconducting magnet system inner cylindrical surface, the inside and outside surface of gradient coil system all arrange damping sound insulation structure, and superconducting magnet system, gradient coil system are all positioned at enclosure interior.
2. nuclear magnetic resonance imaging system denoising device according to claim 1, is characterized in that: leave gap between described body coil system and the inwall of housing.
3. nuclear magnetic resonance imaging system denoising device according to claim 1, is characterized in that: described housing has breach, described body coil system is arranged in breach.
4. nuclear magnetic resonance imaging system denoising device according to claim 1, is characterized in that: the inner wall section of described housing or all cover sound absorbing layer.
5. nuclear magnetic resonance imaging system denoising device according to claim 1, is characterized in that: described damping sound insulation structure is made up of sound-proof material and damping layer.
6. nuclear magnetic resonance imaging system denoising device according to claim 5, is characterized in that: described damping sound insulation structure is for being sheet-type or sheet type.
7. nuclear magnetic resonance imaging system denoising device according to claim 6, is characterized in that: described damping layer and superconducting magnet system inner cylindrical surface, the inside and outside surface of gradient coil system are bonding.
8. nuclear magnetic resonance imaging system denoising device according to claim 1, is characterized in that: between the magnet of described casing surroundings wall inwall on be provided with sound-absorbing structure.
9. nuclear magnetic resonance imaging system denoising device according to claim 8, is characterized in that: described sound-absorbing structure comprises sound absorption cavity and/or acoustical cotton.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510229627.9A CN104777441A (en) | 2015-05-07 | 2015-05-07 | Noise reduction device of nuclear magnetic resonance imaging system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510229627.9A CN104777441A (en) | 2015-05-07 | 2015-05-07 | Noise reduction device of nuclear magnetic resonance imaging system |
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| CN104777441A true CN104777441A (en) | 2015-07-15 |
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| CN201510229627.9A Pending CN104777441A (en) | 2015-05-07 | 2015-05-07 | Noise reduction device of nuclear magnetic resonance imaging system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110222843A (en) * | 2019-07-01 | 2019-09-10 | 上海交通大学 | A kind of Noise Prediction System and method |
| CN110956945A (en) * | 2019-12-16 | 2020-04-03 | 张伟 | Nuclear magnetic resonance noise reduction protection device |
| CN111657946A (en) * | 2020-06-30 | 2020-09-15 | 上海东软医疗科技有限公司 | Medical imaging apparatus |
| CN113835056A (en) * | 2021-10-27 | 2021-12-24 | 开封市人民医院 | Device and method for reducing noise of nuclear magnetic resonance equipment |
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| CN1179540A (en) * | 1996-08-13 | 1998-04-22 | 通用电气公司 | Low noise magnetic resonance imaging scanner |
| JP2001299719A (en) * | 2000-04-27 | 2001-10-30 | Hitachi Medical Corp | Magnetic resonance imaging instrument |
| EP1209479A1 (en) * | 2000-11-22 | 2002-05-29 | GE Medical Systems Global Technology Company LLC | Method and apparatus for reducing acoustic noise in MRI scanners |
| CN1399141A (en) * | 2001-07-23 | 2003-02-26 | 西门子公司 | Nuclear spin tomographic radiography equipment with damping plate |
| CN1606961A (en) * | 2003-08-18 | 2005-04-20 | Ge医药系统环球科技公司 | Acoustically damped gradient coil |
| US20050156595A1 (en) * | 2002-05-08 | 2005-07-21 | Cornellis Leonardus Gerardus Ham | Magnetic resonance imaging apparatus with reduced noise production |
| CN1791805A (en) * | 2003-05-22 | 2006-06-21 | 皇家飞利浦电子股份有限公司 | Magnetic resonance imaging device with sound-absorbing means |
| CN1879033A (en) * | 2003-11-05 | 2006-12-13 | 皇家飞利浦电子股份有限公司 | A MRI system having reduced acoustic noise |
| CN204649949U (en) * | 2015-05-07 | 2015-09-16 | 奥泰医疗系统有限责任公司 | Nuclear magnetic resonance imaging system denoising device |
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2015
- 2015-05-07 CN CN201510229627.9A patent/CN104777441A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1179540A (en) * | 1996-08-13 | 1998-04-22 | 通用电气公司 | Low noise magnetic resonance imaging scanner |
| JP2001299719A (en) * | 2000-04-27 | 2001-10-30 | Hitachi Medical Corp | Magnetic resonance imaging instrument |
| EP1209479A1 (en) * | 2000-11-22 | 2002-05-29 | GE Medical Systems Global Technology Company LLC | Method and apparatus for reducing acoustic noise in MRI scanners |
| CN1399141A (en) * | 2001-07-23 | 2003-02-26 | 西门子公司 | Nuclear spin tomographic radiography equipment with damping plate |
| US20050156595A1 (en) * | 2002-05-08 | 2005-07-21 | Cornellis Leonardus Gerardus Ham | Magnetic resonance imaging apparatus with reduced noise production |
| CN1791805A (en) * | 2003-05-22 | 2006-06-21 | 皇家飞利浦电子股份有限公司 | Magnetic resonance imaging device with sound-absorbing means |
| CN1606961A (en) * | 2003-08-18 | 2005-04-20 | Ge医药系统环球科技公司 | Acoustically damped gradient coil |
| CN1879033A (en) * | 2003-11-05 | 2006-12-13 | 皇家飞利浦电子股份有限公司 | A MRI system having reduced acoustic noise |
| CN204649949U (en) * | 2015-05-07 | 2015-09-16 | 奥泰医疗系统有限责任公司 | Nuclear magnetic resonance imaging system denoising device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110222843A (en) * | 2019-07-01 | 2019-09-10 | 上海交通大学 | A kind of Noise Prediction System and method |
| CN110956945A (en) * | 2019-12-16 | 2020-04-03 | 张伟 | Nuclear magnetic resonance noise reduction protection device |
| CN111657946A (en) * | 2020-06-30 | 2020-09-15 | 上海东软医疗科技有限公司 | Medical imaging apparatus |
| CN113835056A (en) * | 2021-10-27 | 2021-12-24 | 开封市人民医院 | Device and method for reducing noise of nuclear magnetic resonance equipment |
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Application publication date: 20150715 |