阅读说明：本技术 医疗成像设备 (Medical imaging apparatus ) 是由 陈锡荣 于 2021-07-15 设计创作，主要内容包括：本发明公开了一种医疗成像设备,包括：壳体、磁体、隔音件、梯度线圈；其中,壳体用于提供检测区域的通孔和位于通孔周向上的安装腔,磁体设置于安装腔内,隔音件设置于安装腔内,位于磁体和壳体之间,以将安装腔分隔成沿远离通孔方向设置的第一腔体和第二腔体,梯度线圈设置于第一腔体内。本发明实施例提供的医疗成像设备,能够有效降低噪音,提高扫描者的舒适度。(The invention discloses a medical imaging device, comprising: the device comprises a shell, a magnet, a sound insulation piece and a gradient coil; wherein, the casing is used for providing detection area's through-hole and is located through-hole ascending installation cavity of circumference, and the magnet sets up in the installation cavity, and the sound insulating part sets up in the installation cavity, is located between magnet and the casing to separate into first cavity and the second cavity that sets up along keeping away from the through-hole direction with the installation cavity, gradient coil sets up in first cavity. The medical imaging equipment provided by the embodiment of the invention can effectively reduce noise and improve the comfort of a scanner.)

1. A medical imaging device, comprising: the device comprises a shell, a magnet, a sound insulation piece and a gradient coil; wherein, the casing is used for providing detection area's through-hole and being located through-hole ascending installation cavity of week, the magnet set up in the installation cavity, the sound insulating part set up in the installation cavity, be located the magnet with between the casing, in order to with the installation cavity is separated into to be followed and is kept away from first cavity and the second cavity that the through-hole direction set up, gradient coil set up in the first cavity.

2. The medical imaging device of claim 1,

the sound-proof member is for inhaling the sound wall, it includes along keeping away from to inhale the sound wall through-hole direction alternate distribution's at least two-layer wall body, at least one deck the material of wall body is polymer damping material.

3. The medical imaging device of claim 1,

the sound insulation member is an elastic member, and is compressed between the shell and the magnet.

4. The medical imaging device of claim 1,

the casing is including enclosing the barrel of through-hole with set up in barrel ascending shell in week, and connect the tip of barrel with the connecting piece of shell, the sound insulation set up in the connecting piece with between the magnet.

5. The medical imaging device of claim 4,

the connecting piece is multilayer structure, the connecting piece includes at least according to first body and the second body of layer distribution, the second body with the sound insulating part is connected, the second body is the porous material that can inhale the sound.

6. The medical imaging device of claim 5,

the number of the first bodies is at least two, the number of the second bodies is at least two, and the first bodies and the second bodies are alternately distributed.

7. The medical imaging device of claim 4,

the connecting piece is close to the tip of barrel includes interconnect's first baffle and second baffle, first baffle with the tip butt of barrel, the second baffle is followed the barrel central line is interior to extend.

8. The medical imaging device of claim 4,

the connecting piece with the hookup location department of barrel is provided with the first sound piece of inhaling, the first sound piece of inhaling is the elastic component.

9. The medical imaging device of claim 8,

the first sound absorbing member is of an annular hollow structure.

10. The medical imaging device of claim 4, further comprising:

the sealing member, the shell is close to the tip of connecting piece is provided with interconnect's third baffle and fourth baffle, the third baffle with the tip of connecting piece is relative, the fourth baffle extends to the inboard of connecting piece, the sealing member set up at least in the fourth baffle with between the connecting piece.

Technical Field

The invention relates to the technical field of medical equipment, in particular to medical imaging equipment.

Background

Magnetic Resonance Imaging (MRI) devices have been widely used in the field of medical diagnosis. The basic principle of the magnetic resonance imaging device is that a magnet is used to generate a uniform strong magnetic field, hydrogen atoms in a detected body are polarized under the coordination of a gradient field generated by a gradient coil, and then a radio frequency pulse is transmitted by a radio frequency coil to excite the hydrogen atoms to cause nuclear resonance and absorb energy. After stopping the radio frequency pulse, the hydrogen atomic nucleus sends out a radio frequency signal according to a specific frequency, releases the absorbed energy, and obtains an image after receiving and processing the energy.

However, when the mri apparatus scans, the gradient coil generates about 130 db of noise, and the excessive noise may hurt the scanner. Therefore, how to reduce the noise of the gradient coil to improve the comfort of the scanner becomes an urgent technical problem to be solved

Disclosure of Invention

In view of the above, the present invention provides a medical imaging apparatus, which can effectively reduce the noise generated by the gradient coil and improve the comfort of the scanner.

According to an embodiment of an aspect of the present invention, there is provided a medical imaging apparatus including: the device comprises a shell, a magnet, a sound insulation piece and a gradient coil; wherein, the casing is used for providing detection area's through-hole and is located through-hole ascending installation cavity of circumference, and the magnet sets up in the installation cavity, and the sound insulating part sets up in the installation cavity, is located between magnet and the casing to separate into first cavity and the second cavity that sets up along keeping away from the through-hole direction with the installation cavity, gradient coil sets up in first cavity.

Furthermore, the sound insulation piece is the sound absorbing wall, and the sound absorbing wall includes along keeping away from at least two-layer wall body of through-hole direction distribution in turn, and the material of at least one deck wall body is polymer damping material.

Further, the sound insulation member is an elastic member, and the sound insulation member is compressed between the housing and the magnet.

Further, the shell comprises a barrel body enclosing a through hole, a shell arranged on the circumference of the barrel body, and a connecting piece for connecting the end part of the barrel body and the shell, wherein the sound insulation piece is arranged between the connecting piece and the magnet.

Further, the connecting piece is multilayer structure, and the connecting piece includes at least first body and the second body according to layer distribution, and the second body is connected with the sound insulating part, and the second body is the porous material that can inhale the sound.

Further, the number of the first bodies is at least two, the number of the second bodies is at least two, and the first bodies and the second bodies are alternately distributed.

Further, the tip that the connecting piece is close to the barrel includes interconnect's first baffle and second baffle, the tip butt of first baffle and barrel, the second baffle extends inwards along the barrel central line.

Further, the connecting part is provided with first sound piece of inhaling with the hookup location department of barrel, and first sound piece of inhaling is the elastic component.

Further, the first sound-absorbing member is an annular hollow structure.

Further, the medical imaging apparatus further includes: the end part of the shell, which is close to the connecting piece, is provided with a third baffle and a fourth baffle which are connected with each other, the third baffle is opposite to the end part of the connecting piece, the fourth baffle extends to the inner side of the connecting piece, and the sealing piece is at least arranged between the fourth baffle and the connecting piece.

The medical imaging equipment provided by the invention divides the installation cavity formed by the shell into the first cavity and the second cavity which are arranged along the direction far away from the through hole by the sound insulation piece, so that the noise generated by the gradient coil positioned in the first cavity can only be transmitted in the first cavity and can not be transmitted to the second cavity, compared with the noise generated by the gradient coil in the related technology which can be transmitted in the whole installation cavity, the transmission space of the noise is greatly reduced, the noise reduction effect of the smaller transmission space is better, the noise reduction effect is further favorably improved, the influence of the noise on a scanner is reduced, meanwhile, the sound insulation piece can separate the noise generated by the gradient coil from being transmitted to the inside of the second cavity, namely, the sound insulation piece can reduce the transmission quantity of the noise, the noise reduction and absorption effect is favorably further improved, the scanning experience of the scanner is further improved, the cost is lower, and the manufacturability is high, is suitable for popularization and application.

The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. Wherein:

fig. 1 shows a schematic structural diagram of a medical imaging apparatus provided by an embodiment in the related art;

fig. 2 shows a schematic structural diagram of a medical imaging device provided by an embodiment of the invention.

Wherein, the corresponding relationship between the reference numbers and the component names in fig. 1 is:

100 'medical imaging device, 110' housing, 115 'housing, 116' barrel, 130 'magnet, 140' gradient coil, 160 'connector, 200' scanner, a 'first channel, B' second channel;

the correspondence between reference numbers and component names in fig. 2 is:

100 medical imaging equipment, 110 shells, 111 front cover plates, 112 rear cover plates, 113 first cavities, 114 second cavities, 115 shells, 116 barrels, 117 through holes, 130 magnets, 140 gradient coils, 150 sound insulation pieces, 151 first sound insulation pieces, 152 second sound insulation pieces, 160 connecting pieces, 161 first connecting pieces, 162 second connecting pieces, 170 first sound insulation pieces, 180 sealing pieces and 200 scanners.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A medical imaging device provided according to some embodiments of the invention is described below with reference to the accompanying drawings. Fig. 1 shows a medical imaging device 100 'provided by an embodiment of the related art, including a magnet 130', a gradient coil 140 ', and an emitter coil assembly including a transmitting coil, and a housing 110'. The housing 110 includes a cylinder 116 ', a connecting member 160 ', and a housing 115 ', the cylinder 116 ' is connected to the housing 115 ' through the connecting member 160 ', and the three surround an annular installation cavity, and the connecting member 160 ' may be a horn housing. The largest noise source during scanning of the medical imaging apparatus 100 'is the gradient coil 140', the noise generated by the gradient coil 140 'is mainly transmitted outwards through two channels, the first channel a' is the air between the gradient coil 140 'and the magnet 130', the second channel B 'is the air between the gradient coil 140' and the cylinder 116 ', the air is the key medium for transmitting the noise, and then the noise is transmitted to the outside of the housing 110' through the gap of the housing 110 ', the gap between the housing 115' and the connecting member 160 ', and the gap between the connecting member 160' and the cylinder 116 ', so as to interfere with the scanner 200'. The medical imaging apparatus 100 ' on the market is basically unobstructed in the two channels, cannot effectively block the propagation path of noise, and cannot absorb the vibration energy of the noise, so that the environment of the scanner 200 ' is very noisy when the medical imaging apparatus 100 ' scans.

In view of this, as shown in fig. 2, an embodiment of the present invention provides a medical imaging device 100 including a housing 110, a magnet 130, a gradient coil 140, and a noise insulator 150. Wherein the housing 110 defines a through hole 117 for providing a detection area and a mounting cavity located in a circumferential direction of the through hole 117, the magnet 130 and the noise insulator 150 are disposed in the mounting cavity, the noise insulator 150 is located between the magnet 130 and the housing 110 to divide the mounting cavity into a first cavity 113 and a second cavity 114 disposed in a direction away from the through hole 117, and the gradient coil 140 is disposed in the first cavity 113, that is, the gradient coil 140 is located on a side of the magnet 130 facing the through hole 117, that is, the gradient coil 140 is located between the through hole 117 and the magnet 130.

Because the gradient coil 140 is located in the first cavity 113, the sound insulation member 150 can isolate the noise generated by the gradient coil 140 from the second cavity 114, thereby reducing the passage of noise leakage, improving the comfort of the scanned person, and reducing the injury to the scanned person.

That is to say, in the medical imaging apparatus 100 provided in the embodiment of the present invention, the mounting cavity defined by the housing 110 is divided into the first cavity 113 and the second cavity 114 that are independent of each other by the sound insulation member 150, so that the noise generated by the gradient coil 140 located in the first cavity 113 can only be transmitted in the first cavity 113 and cannot be transmitted to the second cavity 114, and compared with the case that the noise generated by the gradient coil 140 in the related art can be transmitted in the whole mounting cavity, the noise transmission space of the noise is greatly reduced, and the noise reduction effect of the smaller transmission space is better, which is further beneficial to improving the noise reduction effect, reducing the influence of the noise on the scanner 200, and improving the scanning experience of the scanner 200.

In the above embodiment, the sound-insulating member 150 has the function of noise reduction, that is, the sound-insulating member 150 can not only separate the installation cavity into the first cavity 113 and the second cavity 114 which are independent of each other, but also can separate the noise generated by the gradient coil from the noise to be transmitted to the inside of the second cavity 114, that is, the sound-insulating member 150 can reduce the transmission amount of the noise, which is beneficial to further improving the noise reduction and absorption effect.

In some possible implementations of the present invention, the noise-damping member 150 is an elastic member, and the noise-damping member 150 is compressed between the housing 110 and the magnet 130. That is to say, separate into first cavity 113 and second cavity 114 independent each other through the elastic component with the installation cavity, simultaneously, compress between casing 110 and magnet 130 through the elastic component for elastic component and magnet 130 zonulae occludens, elastic component and casing 110 zonulae occludens have improved the leakproofness between noise insulation 150 and the magnet 130, and then have improved the leakproofness between first cavity 113 and the second cavity 114, have reduced the noise that gradient coil produced and have propagated the possibility to second cavity 114 through first cavity 113, ensure good noise reduction.

Further, noise insulation 150 is the elastic component, and noise insulation 150 separates into mutually independent first cavity 113 and second cavity 114 with the installation cavity promptly, and simultaneously, noise insulation 150 has the function of inhaling the sound and making an uproar to utilize elasticity to compress tightly between casing 110 and magnet 130, improved the leakproofness between first cavity 113 and the second cavity 114, improved greatly and inhaled the sound and made an uproar the function, simple structure, the function pluralism is suitable for popularization and application.

It can be understood that, noise insulation 150 and casing 110 are for dismantling the connection, and noise insulation 150 and magnet 130 are the contact butt, and because noise insulation 150 is the elastic component and has the function of inhaling the sound, have great flexible volume, and then can dismantle noise insulation 150 and used repeatedly, and do not influence and inhale the sound effect, are favorable to reducing use cost, are suitable for popularization and application.

In some possible embodiments provided by the present invention, the sound insulation member 150 is a sound absorption wall, which has a simple structure, good sound absorption and noise reduction efficiency, low cost, good reliability, and is easy to manufacture and install, and suitable for popularization and application. It is understood that the sound insulator 150 may have other configurations as desired, and the present invention is not particularly limited.

Wherein, inhale the sound wall and include along keeping away from the 117 direction of through-hole two-layer wall body at least that distribute in turn, wherein, the material of at least one deck wall body includes polymer damping material, and polymer damping material has functions such as sound absorption, antivibration, and then can ensure to inhale the sound wall and magnet 130, inhale the reliability of sound wall and casing 110 contact to have good sound noise reduction effect of inhaling. Specifically, the polymer damping material includes polyacrylate, polyurethane, epoxy resin, butyl rubber, nitrile rubber or other materials meeting the requirements, and the invention is not particularly limited.

It can be understood that, on the one hand, the material of other layers of wall body of inhaling the sound wall also can be polymer damping material, and such setting is favorable to guaranteeing to inhale the sound wall and has higher sound absorption and fall the ability of making an uproar, ensures good sound function of inhaling, simultaneously, is convenient for process and production.

On the other hand, the material of the other wall of the sound-absorbing wall may also be other material whose rigidity is greater than that of the polymer damping material, for example, the other wall is made of material with a larger elastic modulus, which is beneficial to ensuring that the sound-insulating member has better rigidity and reliability, improving the reliability of the connection between the sound-absorbing wall and the casing 110, and the sound-absorbing wall and the magnet 130, and simultaneously preventing noise to a certain extent from being transmitted to the second cavity 114 through the first cavity 113. Due to the arrangement, the sound-absorbing wall is made of different materials, namely the sound-absorbing wall is of a layered structure made of different materials, so that the sound-absorbing wall is favorable for improving the reliability of the sound-absorbing wall and reducing the manufacturing cost under the condition of ensuring good sound absorption and noise reduction.

Specifically, inhale the sound wall and include two-layer wall body, three-layer wall body, four-layer wall body or other quantity layer wall bodies that satisfy the requirement, the wall body number of piles of inhaling the sound wall is different, can satisfy the different demands of inhaling sound noise reduction effect, different cost, has enlarged the application range of product. It can be understood that, inhale the laminar structure that the sound wall is different materials, be favorable to losing the vibration energy consumption of noise, make the noise restraint in first cavity 113, difficult outwards propagate, and then improve noise reduction.

In some possible embodiments provided by the present invention, as shown in fig. 2, the housing 110 includes a cylindrical body 116 enclosing a through hole 117 and a casing 115 disposed on a circumference of the cylindrical body 116, and a connecting member 160 connecting an end of the cylindrical body 116 and the casing 115, specifically, the connecting member 160 may be a horn housing, and since the connecting member 160 is a horn housing structure and the soundproof member 150 partitions the installation cavity into the first cavity 113 and the second cavity 114, the soundproof member 150 is an annular structure, is distributed along a circumference of the connecting member 160, or other structures meeting the requirement, and the present invention is not particularly limited. The medical imaging apparatus 100 further includes a transmitting coil disposed on a side of the barrel 116 close to the gradient coil 140, that is, the transmitting coil is located inside the installation cavity, and the transmitting coil and the barrel 116 form an emitter coil assembly of the medical imaging apparatus 100.

Wherein, connecting piece 160 is provided with inhales the sound structure, make the noise that gradient coil 140 produced propagate to connecting piece 160 after first passageway A between gradient coil 140 and magnet 130, propagate to connecting piece 160 after second passageway B between gradient coil 140 and barrel 116, can inhale the sound by the sound structure of inhaling of connecting piece 160 and fall and make an uproar, further reduced the noise and propagated to the outside transmission volume of shell 115 in by first cavity 113, the noise reduction effect is greatly improved, and then the comfort level of scanner 200 has been improved, promote scanner 200's scanning experience.

In the above embodiment, the connecting member 160 is a multi-layer structure, the connecting member 160 includes a first body and a second body distributed at least in layers, the second body is connected to the sound-insulating member 150, that is, the second body is located on one side of the first body facing the first cavity 113, that is, the second body is located near the inside of the first cavity 113, and the first body is located near the outside of the first cavity 113, such an arrangement enables one end of the sound-insulating member 150 to abut against the magnet 130, and the other end of the sound-insulating member is connected to the second body of the connecting member 160, that is, the first cavity 113 is surrounded by the connecting member 160, the sound-insulating member 150, the cylinder 116, and the magnet 130, and the gradient coil 140 is located in the first cavity 113, thereby further facilitating to further reduce the volume of the first cavity 113, that is, a propagation space of noise generated by the gradient coil 140 is reduced, and facilitating to improve noise reduction effect. Moreover, one end of the sound insulation member 150 is abutted against the magnet 130, and the other end of the sound insulation member is connected with the second body of the connecting member 160, so that the connecting member 160, the sound insulation member 150, the cylinder 116 and the magnet 130 surround the first cavity 113, only the joint of the connecting member 160 and the cylinder 116 is arranged, and the joint of the connecting member 160 and the sound insulation member 150 is possibly provided with a gap to enable air circulation to propagate noise.

Wherein, the one end of noise insulation piece 150 and magnet 130 butt are favorable to improving the leakproofness that noise insulation piece 150 and magnet 130 are connected, and then the noise reduction is propagated to the condition emergence of second cavity 114 by first cavity 113 through the gap between noise insulation piece 150 and the magnet 130 by the air, improves the leakproofness of first cavity 113 and second cavity 114. The other end of the sound insulating member 150 is connected to the second body of the connecting member 160, which is beneficial to improving the reliability of fixing the sound insulating member 150, and it can be understood that the sound insulating member 150 may be connected to the second body of the connecting member 160 through a connecting structure, specifically, the connecting structure may be a groove and protrusion structure or other structures meeting the requirement, and the invention is not limited in particular. Specifically, the sound-insulating member 150 is detachably connected to the connecting member 160, which is beneficial to improving the recycling rate of the sound-insulating member 150 and reducing the use cost.

Further, the material of the second body through the connecting piece 160 is a porous material capable of absorbing sound, and can be a polymer porous material, so that the connecting piece 160 has a sound absorbing structure, and can absorb and consume the vibration energy of noise, that is, the second body is a sound absorbing layer, and has a good sound absorbing and noise reducing function. Specifically, the polymer porous material has a good sound absorption effect, such as glass wool, slag wool, inorganic fiber and other materials meeting the requirements, and the invention is not particularly limited.

Further, the rigidity of the first body is greater than that of the second body, that is, the first body is made of a material with a large elastic modulus, so that the connecting piece 160 has good rigidity and reliability, the reliability of the connecting piece 160 in connecting the shell 115 and the cylinder 116 is improved, the service life of the connecting piece 160 is prolonged, meanwhile, the second body can prevent noise from being transmitted, noise is restrained in the first cavity 113, and the sound absorption and noise reduction capability of the connecting piece 160 is further improved.

That is to say, the connecting member 160 includes the first body and the second body that distribute according to the layer, can absorb and consume the vibration energy of noise through the second body, and the first body adopts the material that modulus of elasticity is great to make, can prevent the propagation of noise, and then can retrain the noise in first cavity 113 to with the vibration energy consumption of noise, improved the noise reduction effect greatly, and can ensure that the connecting member 160 has good rigidity and reliability, be suitable for popularization and application.

Further, the number of the first bodies is at least two, and the number of the second bodies is at least two, that is, the connection member 160 has a multi-layer structure. Such an arrangement is beneficial to improve the noise reduction effect of the connecting member 160. Wherein, first body and second body distribute in turn, and such setting is favorable to improving the rigidity of connecting piece 160 greatly, ensures good connection effect to have higher sound absorption noise-proof effect. It is understood that, in this case, the number of the first bodies and the second bodies may be equal or different.

In a specific embodiment, in order to ensure that the portion of the connection member 160 facing the first cavity 113 is the second body and the portion of the connection member 160 exposed to the external environment is the first body, generally, the same number of first bodies and second bodies may be alternately arranged.

Further, the thickness of all the first bodies, i.e., the thickness of 3mm or more and 10mm or less, is advantageous for ensuring sufficient rigidity of the connection member 160 and making the overall weight of the connection member 160 in a proper range, thereby ensuring reliability of the connection member 160 connecting the housing 115 and the cylinder 116. In particular, the sum of the thicknesses of all the first bodies is 3mm, 4mm, 5mm, 10mm or other values that meet the requirements.

The thickness of all second bodies and more than or equal to 3mm less than or equal to 100mm are favorable to guaranteeing that connecting piece 160 has the better function of making an uproar that inhales to make the whole weight of connecting piece 160 in suitable range, and it can be understood that the thickness of second body is bigger, and it is better to inhale the sound noise reduction effect. In particular, the sum of the thicknesses of all the second bodies is 3mm, 5mm, 10mm, 100mm or other values that meet the requirements.

The thickness of barrel 116 is more than or equal to 8mm less than or equal to 30mm, because the noise that gradient coil 140 produced can attenuate through barrel 116 in the transmission process, through the wall thickness of reasonable setting barrel 116, can be great attenuate the propagation of noise. It will be appreciated that the thicker the wall thickness of the barrel 116, the more the noise energy is attenuated and the better the noise isolation. Meanwhile, the thickness and the weight of the cylinder body 116 are large, and the volume of the installation cavity is influenced, so that the thickness of the cylinder body 116 is reasonably set, the transmission of noise is effectively attenuated under the condition that the weight of the cylinder body 116 and the volume of the accommodating cavity are in a proper range, and a good noise reduction effect is ensured,

further, since the thickness of the cylinder 116 is greater than or equal to 8mm and less than or equal to 30mm, that is, the cylinder 116 has a sufficient wall thickness, it is not necessary to provide a through hole on the cylinder wall of the cylinder 116 for mounting the magnetron coil or other electronic components, and it is only necessary to provide a mounting counterbore for mounting the magnetron coil or the electronic components on the cylinder 116. The mounting counter bore is a hole which is not perforated and is arranged on the cylinder wall, thereby reducing the risk of noise transmission and further reducing the transmission path of noise. Specifically, the thickness of the barrel 116 is 8mm, 10mm, 15mm, 30mm or other value that meets the requirements.

In some possible embodiments of the present invention, as shown in fig. 2, the housing 115 includes a front cover plate 111 and a rear cover plate 112, the connecting member 160 includes a first connecting member 161 and a second connecting member 162, and the noise insulating member 150 includes a first noise insulating member 151 and a second noise insulating member 152, wherein the first connecting member 161 connects the front cover plate 111 and the front end of the cylinder 116, the second connecting member 162 connects the rear cover plate 112 and the rear end of the cylinder 116, the first noise insulating member 151 contacts the first connecting member 161 through the first noise insulating member 151, the first noise insulating member 151 contacts the front end surface of the magnet 130, the second noise insulating member 152 contacts the second connecting member 162, the second noise insulating member 152 contacts the rear end surface of the magnet 130, and the first noise insulating member 151, the first connecting member 161, the cylinder 116, the second connecting member 162, and the second noise insulating member 152 surround the first cavity 113, and the gradient coil 140 is located in the first cavity 113, thereby greatly reducing a propagation space of noise generated by the gradient coil 140, that is, most of the noise is transmitted through the first channel a and the second channel B in the first cavity 113, and is mainly transmitted to the external environment interference scanner 200 from the first cavity 113 through the connection gaps between the first connector 161 and the cylinder 116, the second connector 162 and the cylinder 116, the first noise insulator 151 and the first connector 161, and the second noise insulator 152 and the second connector 162.

Further, the first noise insulating member 151 is connected to a portion of the front end surface of the magnet 130 close to the gradient coil 140, and the second noise insulating member 152 is connected to a portion of the rear end surface of the magnet 130 close to the gradient coil 140, so that a propagation space of noise generated by the gradient coil 140 is reduced, and the propagation space of noise is small, which is beneficial to ensuring a good noise reduction effect.

It will be appreciated that the housing 115 further comprises a top plate and a connecting plate, the front cover plate 111 and the rear cover plate 112 are oppositely disposed on two sides of the top plate, and the connecting plate connects the top plate, the front cover plate 111 and the rear cover plate 112 to define the housing 115 into the second cavity 114 and a portion of the first cavity 113.

In some possible embodiments of the present invention, the end of the connecting member 160 near the can 116 includes a first baffle and a second baffle connected to each other, the first baffle abuts against the end of the can 116, and the second baffle extends inward along the centerline of the can 116, i.e., the second baffle may extend to the inside of the can 116 or to the outside of the can 116, and the second baffle overlaps the can 116 in the direction of the centerline of the can 116. That is to say, the end of the connecting member 160 close to the cylinder 116 is L-shaped, the connecting member 160 and the cylinder 116 are assembled in a multi-angle manner, and the connecting member 160 has at least two matching surfaces, such as a plane where the end of the cylinder 116 is located and a plane where the inner wall surface of the cylinder 116 is located, and because the two matching surfaces are non-coplanar, such an arrangement increases the length of a propagation path of the noise outwards propagated from the first cavity 113 through the connecting member 160 and the cylinder 116, and is not beneficial to the propagation of the noise, thereby greatly improving the noise reduction effect.

Further, the first sound absorbing member 170 is arranged at the connecting position of the connecting member 160 and the cylinder 116, and the arrangement of the first sound absorbing member 170 greatly reduces the possibility of outward transmission of noise from the first cavity 113 through the connecting member 160 and the cylinder 116, i.e. the leakage of noise from the gap between the connecting member 160 and the cylinder 116 can be effectively prevented, and good noise reduction and absorption effects are ensured.

It can be understood that since the end of the connecting member 160 close to the cylinder 116 is L-shaped, that is, the connecting member 160 and the cylinder 116 are assembled in a polygonal manner, the first sound-absorbing member 170 and the connecting member 160 disposed between the connecting member 160 and the cylinder 116 are also assembled in a polygonal manner, and such an arrangement ensures a good noise reduction effect in combination with the sound-absorbing function on the basis of increasing the length of the propagation path of the noise outwardly propagated from the first cavity 113 through the connection of the connecting member 160 and the cylinder 116, and difficulty in propagation.

The first sound absorbing member 170 is an elastic member, which is beneficial to improving the sealing performance of the connection between the connection member 160 and the cylinder 116, and further reduces the possibility of outward transmission of noise from the first cavity 113 through the connection between the connection member 160 and the cylinder 116, i.e., the leakage of noise from the gap between the connection member 160 and the cylinder 116 can be effectively prevented, and a good noise reduction and absorption effect is ensured. It can be understood that the first sound absorbing member 170 has a large amount of expansion and contraction, and the first sound absorbing member 170 is detachably connected to the connecting member 160 and the cylinder 116, so that the first sound absorbing member 170 can be reused, the sound absorbing and noise reducing effects are not affected, and the use cost is reduced.

Further, first sound piece 170 of inhaling is annular hollow structure, hollow structure's setting for first sound piece 170 of inhaling has the damping effect, and then has good elasticity and elasticity, is favorable to improving the leakproofness that connecting piece 160 and barrel 116 are connected. Simultaneously, first sound piece 170 of inhaling is hollow structure for first sound piece 170's cross-section is closed figure, and the cross-section is closed figure and is compared for the opening figure with the cross-section, has higher sound noise reduction effect of inhaling, and then can improve the ability of making an uproar. It is to be understood that the surface of the first sound absorbing member 170 that matches the connecting member 160 is a base surface, and the cross section of the first sound absorbing member 170 may be a cross section perpendicular to the base surface, a cross section parallel to the base surface, or a cross section intersecting the base surface, and the present invention is not particularly limited.

In some possible embodiments provided by the present invention, further, the end of the housing 115 close to the connecting member 160 is provided with a third baffle and a fourth baffle, which are connected to each other, the third baffle is opposite to the end of the connecting member 160, the fourth baffle extends to the inner side of the connecting member 160, that is, the end of the housing 115 close to the connecting member 160 is L-shaped, the connecting member 160 and the housing 115 are assembled in a multi-angled manner, and the connecting member 160 and the housing 115 have at least two mating surfaces, such as a plane where the end of the connecting member 160 is located and a plane where the inner wall surface of the connecting member 160 is located, and since the two mating surfaces are non-coplanar, such an arrangement increases the length of a propagation path of noise outwards propagating from the first cavity 113 through the connecting member 160 and the housing 115, and is not beneficial to noise propagation, thereby greatly improving noise reduction effect.

Further, a sealing member 180 is disposed at a connection position of the connection member 160 and the housing 115, and in particular, the sealing member 180 is disposed at least between the fourth blocking plate and the connection member 160. The sealing element 180 is favorable for improving the sealing performance of the connection between the shell 115 and the connecting piece 160, so that the sealing performance of the second cavity 114 is improved, partial noise is prevented from being transmitted to the second cavity 114 through the first cavity 113, the gap between the shell 115 and the connecting piece 160 is transmitted to the outside of the shell 115, the noise reduction possibility is further improved, and a good noise reduction and absorption effect is ensured through double protection. It will be appreciated that the seal 180 may also be fitted to the housing 115 in a multi-cornered manner.

Since the noise insulation member 150 is connected to the connection member 160, that is, the noise insulation member 150 is located on the side of the sealing member 180 close to the cylinder 116, that is, the noise insulation member 150 is located on the inner side of the sealing member 180, as shown in fig. 2, the diameter X1 of the noise insulation member 150 is smaller than the diameter X2 of the sealing member 180, such that the sealing member 180 is not located in the first cavity 113 accommodating the gradient coil 140, and the sealing member 180 is located in the second cavity 114, noise generated by the gradient coil 140 is mainly propagated in the first cavity 113, less noise is propagated to the second cavity 114 through the first cavity 113, and less noise is propagated from the second cavity 114 to the outside of the housing 115 through the connection position of the connection member 160 and the housing 115, and at the same time, since the sealing member 180 is provided at the connection position of the connection member 160 and the housing 115, the sealing property of the second cavity 114 is further improved, and the possibility of noise propagation from the second cavity 114 to the outside is reduced, the noise reduction effect is greatly improved.

The sealing member 180 is an elastic member, and the elastic sealing member 180 is beneficial to improving the sealing performance of the connection between the connection member 160 and the housing 115, and further reduces the possibility of noise transmission through the gap between the connection member 160 and the housing 115. Specifically, the sealing member 180 may be a sealing ring, a sealing strip, a sealing gasket, or other sealing structure meeting the requirement, and the present invention is not particularly limited. It can be understood that the sealing member 180 has a large amount of expansion and contraction and elasticity, and the sealing member 180 is detachably connected with the connecting member 160 and the housing 115, so that the sealing member 180 can be reused without affecting the sealing effect and reducing the use cost.

Compared with the related technical scheme, the technical scheme of the invention has the following technical effects:

1. the noise reduction effect is obvious, and the noise reduction can reach 15 dB;

2. the sound insulation member 150, the first sound absorption member 170 and the sealing member 180 are made of materials with good rebound resilience and high compression amount, can be repeatedly disassembled and assembled, ensure good noise reduction function or sealing function and reduce use cost;

3. low cost, good manufacturability, high reliability and suitability for popularization and application.

In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically defined, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In the present invention, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.