Magnetic resonance imaging apparatus and cover assembly thereof

Abstract

The utility model provides a cover assembly of magnetic resonance imaging equipment. A magnetic resonance imaging apparatus includes an inner cylinder (10). The cap assembly includes an end cap (20) and a slit closure (30). The end cap (20) covers the outer peripheral space (P) of the inner cylinder (10) in a direction parallel to the axial direction (A) of the inner cylinder (10). A gap (G) is formed between the end cover (20) and the inner cylinder (10) along the axial direction (A). The gap sealing piece (30) is elastic and is used for connecting the end cover (20) and the inner cylinder (10) and sealing the gap (G). The cover assembly of the magnetic resonance imaging equipment is beneficial for improving the sound insulation effect. In addition, the utility model also provides magnetic resonance imaging equipment.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to a cover assembly of a magnetic resonance imaging device and the magnetic resonance imaging device. Background Art

[0002] When the MRI equipment is running, system noise will be generated. The main reason for the noise is that different currents are passed through the electromagnetic wires inside the gradient coil. Under the action of the magnetic field of the magnet, the electromagnetic wires inside the gradient coil will generate Lorentz magnetic force, causing the gradient coil to vibrate and generate noise.

[0003] Reference Figure 7 The inner space of the inner cylinder 10 of the magnetic resonance imaging device is used to accommodate the subject during the magnetic resonance imaging process. The inner cylinder 10, for example, is used together with the radio frequency coil 83 as a part of the body coil unit. The end cover 20 (also called the bell mouth) is used to cover the peripheral space P of the inner cylinder 10 along the axial direction A of the inner cylinder 10 and the opposite direction. The peripheral space P is used to accommodate the main magnet 81 and the gradient coil 82. Due to manufacturing and / or assembly deviations, a gap G is bound to be left between the inner cylinder 10 and the end cover 20. The noise generated by the gradient coil 82 is mainly transmitted to the internal space of the inner cylinder 10 through the gap G between the inner cylinder 10 and the end cover 20, affecting the scanning experience of the subject.

[0004] At present, noise is often blocked by pasting sound insulation cotton in the gap G. The pasting of the sound insulation cotton is carried out by workers on site based on personal experience. The pasting is difficult, the pasting accuracy is easily affected by human factors, and the sound insulation effect is not ideal. Utility Model Content

[0005] The utility model aims to provide a cover assembly of a magnetic resonance imaging device, which is beneficial to improving the sound insulation effect.

[0006] Another object of the present invention is to provide a magnetic resonance imaging device, which is beneficial to improving the sound insulation effect.

[0007] The utility model provides a cover assembly of a magnetic resonance imaging device. The magnetic resonance imaging device comprises an inner cylinder. The cover assembly comprises an end cover and a gap sealing member. The end cover is used to cover the outer peripheral space of the inner cylinder along a direction parallel to the axial direction of the inner cylinder. A gap is spaced between the end cover and the inner cylinder along the axial direction. The gap sealing member is elastic and is used to connect the end cover and the inner cylinder and seal the gap.

[0008] The cover assembly of the magnetic resonance imaging device seals the gap between the end cover and the inner cylinder through its gap sealing piece, which has a good sound insulation effect. Compared with using sound insulation cotton to seal the gap, it reduces the difficulty of installation, and the installation accuracy is not easily affected by human factors, which is conducive to improving the sound insulation effect.

[0009] In another exemplary embodiment of the cover assembly of the magnetic resonance imaging device, the gap sealing member includes a penetration portion, a cover attachment portion and a tube attachment portion. The penetration portion is used to penetrate the gap. The cover attachment portion is used to be arranged on the side of the end cap facing the peripheral space and its shape is set to be able to attach the end cap. One end of the penetration portion passing through the gap is connected to the cover attachment portion. The tube attachment portion is used to be arranged on the inner side of the inner tube and its shape is set to be able to attach the inner tube. The other end of the penetration portion passing through the gap is connected to the tube attachment portion. The structure is simple and easy to assemble.

[0010] In another exemplary embodiment of the cover assembly of the magnetic resonance imaging device, the gap sealing member can make the tube attachment part attached to the inner tube through its own elastic restoring force. In this way, in the case of uneven gaps, the tube attachment part and the inner tube can be seamlessly attached through different elastic deformation amounts, which is conducive to further improving the sound insulation effect.

[0011] In another exemplary embodiment of the cover assembly of the magnetic resonance imaging device, the gap sealing member is an elastic body formed in one step, thereby facilitating processing and providing a stable structure.

[0012] In another exemplary embodiment of the cover assembly of the magnetic resonance imaging device, the gap sealing member further comprises a first lip. The first lip is connected to the penetration portion and is used to adhere to the surface of the end cap facing away from the peripheral space. The cover attachment portion, the penetration portion and the first lip together wrap the edge of the end cap. Thereby, the gap between the penetration portion and the end cap can be shielded.

[0013] In another exemplary embodiment of the cover assembly of the magnetic resonance imaging device, the end of the first lip portion gradually becomes thinner, thereby facilitating improving the flatness of the surface.

[0014] In another exemplary embodiment of the cover assembly of the magnetic resonance imaging device, the inner surface of the inner cylinder near the gap is recessed to form a step. The cylinder attachment portion is used to attach to the lower step surface formed by the concave step. The gap sealing member also includes a second lip. The second lip is connected to the end of the cylinder attachment portion along the axial direction and is used to attach to the upper step surface of the step. This can block the gap between the cylinder attachment portion and the inner cylinder.

[0015] In another exemplary embodiment of the cover assembly of the magnetic resonance imaging device, the end of the second lip portion gradually becomes thinner, thereby facilitating improving the flatness of the surface.

[0016] In another exemplary embodiment of the cover assembly of the magnetic resonance imaging device, the cover attachment portion is adhered to the end cover by an adhesive, thereby facilitating the processing of the cover assembly.

[0017] The utility model also provides a magnetic resonance imaging device, which includes an inner cylinder and the above-mentioned cover assembly. The outer peripheral space of the inner cylinder is used to accommodate the main magnet and gradient coil of the magnetic resonance imaging device, and the inner space of the inner cylinder is used to accommodate the subject during the magnetic resonance imaging process. The end cover is used to cover the outer peripheral space of the inner cylinder in a direction parallel to the axial direction of the inner cylinder. The end cover and the inner cylinder are separated by a gap along the axial direction. The gap sealing member is used to connect the end cover and the inner cylinder and close the gap. The cover assembly of the magnetic resonance imaging device closes the gap between the end cover and the inner cylinder through its gap sealing member, which has a good sound insulation effect. Compared with using sound insulation cotton to close the gap, the difficulty of installation is reduced, and the installation accuracy is not easily affected by human factors, which is conducive to improving the sound insulation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings are only used to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0019] Figure 1 The present invention is a structural schematic diagram of an exemplary embodiment of a cover assembly of a magnetic resonance imaging device.

[0020] Figure 2 for Figure 1 A schematic structural diagram of the gap sealing member of the cover assembly is shown.

[0021] Figure 3 For along Figure 1 Cross-sectional view of III-III.

[0022] Figure 4 for Figure 3 Exploded view of the structure shown.

[0023] Figure 5 for Figure 3 Enlarged view of the middle V section.

[0024] Figure 6 Another exemplary embodiment is provided to illustrate a cover assembly.

[0025] Figure 7 A schematic diagram of a portion of the structure of a magnetic resonance imaging device.

[0026] Description of symbols

[0027] 10 Inner tube

[0028] 11 steps

[0029] 12 Lower step surface

[0030] 13 Upper step surface

[0031] 20 End cap

[0032] 30 Gap sealer

[0033] 31 Wearing Department

[0034] 32 Cover attachment part

[0035] 33. Tube attachment part

[0036] 34 First Lip

[0037] 35 Second Lip

[0038] 81 Main magnet

[0039] 82 Gradient Coil

[0040] 83 RF Coil

[0041] G Gap

[0042] P Peripheral Space

[0043] A Axial DETAILED DESCRIPTION

[0044] In order to have a clearer understanding of the technical features, purposes and effects of the utility model, the specific implementation methods of the utility model are now described with reference to the accompanying drawings. The same reference numerals in the drawings represent components with the same structure or similar structures but the same functions.

[0045] In this document, “exemplary” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “exemplary” should not be interpreted as a more preferred or more advantageous technical solution.

[0046] In this article, "first", "second", etc. do not indicate their importance or order, but are only used to indicate the difference between each other for the convenience of document description.

[0047] In order to make the drawings concise, each figure only schematically shows the parts related to the utility model, which do not represent the actual structure of the product.

[0048] like Figure 7As shown, the magnetic resonance imaging device includes an inner cylinder 10 and an end cover 20. The internal space of the inner cylinder 10 is used to accommodate the subject during the magnetic resonance imaging process. The inner cylinder 10, for example, serves as a part of the body coil unit together with the radio frequency coil 83. The end cover 20 is mostly in the shape of a bell mouth, so it is also called a bell mouth. The end cover 20 is used to cover the peripheral space P of the inner cylinder 10 along the axial direction A of the inner cylinder 10 and the opposite direction. The peripheral space P is used to accommodate the main magnet 81 and the gradient coil 82, for example. In the assembly process of the magnetic resonance imaging device, the main magnet 81, the gradient coil 82 and the body coil unit (including the inner cylinder 10 and the radio frequency coil 83) are usually assembled first, and then the end cover 20 is added. Due to manufacturing and / or assembly deviations, the end cover 20 and the inner cylinder 10 are separated by a gap G along the axial direction A. The shapes of the inner cylinders and end covers of different models of magnetic resonance imaging devices are different, and the shapes of the gap G may also be different. Figure 7 It is only used to understand the gap G and does not represent the actual shape of the product.

[0049] The utility model provides a cover assembly of a magnetic resonance imaging device. The cover assembly comprises an end cover 20 and a gap sealing member 30. The gap sealing member 30 is elastic and is used to connect the end cover 20 and the inner cylinder 10 and seal the gap G. The gap sealing member, the end cover and the inner cylinder are manufactured separately. Figure 1 The present invention is a structural schematic diagram of an exemplary embodiment of a cover assembly of a magnetic resonance imaging device. Figure 2 for Figure 1 A schematic structural diagram of the gap sealing member of the cover assembly is shown. Figure 3 For along Figure 1 Cross-sectional view of III-III.

[0050] Specifically, Figures 1 to 3 As shown, the gap sealing member 30 is roughly in the shape of a band extending along the gap G. It can also be understood that the gap sealing member 30 is roughly in the shape of a band extending along the edge of the inner cylinder 10 where the gap G is formed. Figure 4 for Figure 3 Exploded view of the structure shown. Figure 5 for Figure 3 Enlarged view of the middle V section. Figures 2 to 5 As shown, the gap sealing member 30 includes a penetration portion 31, a cover attachment portion 32 and a tube attachment portion 33. Figure 5 As shown, the penetration portion 31 is used to penetrate the gap G. The cover attachment portion 32 is used to be arranged on the side of the end cover 20 facing the peripheral space P and its shape is set to be able to attach the end cover 20. One end of the penetration portion 31 passing through the gap G is connected to the cover attachment portion 32. The tube attachment portion 33 is used to be arranged on the inner side of the inner tube 10 and its shape is set to be able to attach the inner tube 10. The other end of the penetration portion 31 passing through the gap G is connected to the tube attachment portion 33. Thereby, the gap sealing member 30 realizes the closure of the gap G. The structure is simple and easy to assemble. In this article, "attach" should be interpreted as "close to".

[0051] It can be understood that in different embodiments, the shape of the gap sealing member 30 should be adapted to the shape of the inner cylinder and the end cover in actual use, so that it can be attached to the inner cylinder and the end cover, thereby achieving sealing of the gap and achieving a good sound insulation effect.

[0052] See also Figure 3 During installation, the cover attachment portion 32 is first fixed to the end cover 20 by, for example, adhesive bonding, and then the combination of the gap sealing member 30 and the end cover 20 is covered on the inner cylinder 10 along the axial direction A to achieve Figure 3 The assembly state is shown. The installation operation is relatively simple. Fixing the gap sealing member 30 to the end cover 20 first and then covering the inner cylinder 10 can facilitate the installation operation and facilitate the subsequent maintenance. The cover attachment portion 32 is arranged on the side of the end cover 20 facing the peripheral space P, which can avoid the excess part of the adhesive used for sticking the cover attachment portion 32 on the edge affecting the appearance. In the embodiment where other structures are used to fix the cover attachment portion 32, the fixing structure can also avoid the influence of the appearance.

[0053] The cover assembly of the magnetic resonance imaging device seals the gap between the end cover and the inner cylinder through its gap sealing piece, which has a good sound insulation effect. Compared with using sound insulation cotton to seal the gap, it reduces the difficulty of installation, and the installation accuracy is not easily affected by human factors, which is conducive to improving the sound insulation effect.

[0054] In the exemplary embodiment, the gap sealing member can make the cylinder attachment part 33 attached to the inner cylinder 10 through its own elastic restoring force. In this way, when the gap G is uneven, the cylinder attachment part and the inner cylinder can be seamlessly attached through different elastic deformation amounts, which is conducive to further improving the sound insulation effect.

[0055] Specifically, the gap sealing member is, for example, an elastomer formed in one step, and its material is, for example, TPU (thermoplastic polyurethane) or silicone. This makes it easy to process and the structure stable. TPU has good wear resistance and high mechanical strength, good processing performance, and a wide range of hardness, and can be injected or extruded. The surface of TPU can have good paint adhesion and can meet the appearance requirements of the product. Silicone material also has good mechanical properties and processing performance, a wide range of hardness, and biocompatible silicone does not require painting, and different colors and brightness can be allocated according to product requirements.

[0056] The gap sealing member 30 is pre-deformed at its tube attachment portion 33, for example, to facilitate seamless attachment of the gap sealing member 30 and the inner tube 10. The amount of pre-deformation needs to be set according to the unevenness of the gap. The Shore hardness of the TPU material is, for example, 80±5 degrees, and the pre-deformation amount is, for example, set to 1.0-1.5 mm. The Shore hardness of the silicone material is, for example, 45±10 degrees, and the pre-deformation amount is, for example, set to 1.5-2 mm.

[0057] like Figure 4 As shown, in the exemplary embodiment, the inner surface of the inner cylinder 10 near the gap G is concave to form a step 11. The cylinder attachment portion 33 is used to attach to the lower step surface 12 formed by the concave step 11. The cylinder attachment portion 33 is kept flush with the upper step surface 13 of the step 11, thereby facilitating improving the flatness of the surface.

[0058] Figure 6 Another exemplary embodiment of the cover assembly is used to illustrate the cover assembly. Figure 1 The same or similar parts of the cover assembly shown are not described in detail here, and the differences are as follows. Figure 6 As shown, in this exemplary embodiment, the gap sealing member 30 further includes a first lip portion 34. The first lip portion 34 is connected to the penetration portion 31 and is used to adhere to the surface of the end cap 20 that faces away from the peripheral space P. The cover attachment portion 32, the penetration portion 31 and the first lip portion 34 together wrap the edge of the end cap 20. Thereby, the gap between the penetration portion 31 and the end cap 20 can be shielded.

[0059] like Figure 6 As shown, in the exemplary embodiment, the end of the first lip 34 (ie Figure 6 The left end in the figure gradually becomes thinner to allow the surface to transition smoothly, thereby improving the flatness of the surface.

[0060] like Figure 6 As shown in the exemplary embodiment, the inner surface of the inner cylinder 10 near the gap G is recessed to form a step 11. The cylinder attachment portion 33 is used to attach to the lower step surface 12 formed by the concave step 11. The gap sealing member also includes a second lip 35. The second lip 35 is connected to the end of the cylinder attachment portion 33 along the axial direction A (i.e. Figure 6 The right end in the middle) is used to be attached to the upper step surface 13 of the step 11. The gap between the tube attachment portion 33 and the inner tube 10 can be shielded thereby.

[0061] like Figure 6 As shown, in the exemplary embodiment, the end of the second lip 35 (ie Figure 6 The right end in the figure gradually becomes thinner to allow the surface to transition smoothly, thereby improving the flatness of the surface.

[0062] In the exemplary embodiment, the cover attaching portion 32 is attached to the end cover 20 by an adhesive, thereby facilitating the processing of the cover assembly and the replacement of the gap sealing member.

[0063] The utility model also provides a magnetic resonance imaging device, in one exemplary embodiment of which, the magnetic resonance imaging device includes an inner cylinder 10 and a cover assembly as described above. The peripheral space P of the inner cylinder 10 is used to accommodate the main magnet and gradient coil of the magnetic resonance imaging device, and the internal space of the inner cylinder 10 is used to accommodate the subject during the magnetic resonance imaging process. The end cap 20 is used to cover the peripheral space P of the inner cylinder 10 along a direction parallel to the axial direction A of the inner cylinder 10. The end cap 20 and the inner cylinder 10 are separated by a gap G along the axial direction A. The gap sealing member 30 is used to connect the end cap 20 and the inner cylinder 10 and close the gap G. Figure 5 As shown, the surface of the inner cylinder 10 for the cylinder attachment portion 33 to be attached gradually expands radially outward in the opposite direction of the axial direction A to form a bell-mouth shape, so that when the cover assembly is covered on the inner cylinder 10 along the axial direction A, the cylinder attachment portion 33 slides against the bell-mouth-shaped surface and elastically deforms under the abutment thereof, thereby facilitating assembly.

[0064] The cover assembly of the magnetic resonance imaging device seals the gap between the end cover and the inner cylinder through its gap sealing piece, which has a good sound insulation effect. Compared with using sound insulation cotton to seal the gap, it reduces the difficulty of installation, and the installation accuracy is not easily affected by human factors, which is conducive to improving the sound insulation effect.

[0065] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0066] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present utility model. They are not intended to limit the scope of protection of the present utility model. Any equivalent implementation scheme or changes that do not deviate from the technical spirit of the present utility model, such as combination, division or repetition of features, should be included in the scope of protection of the present utility model.

Claims

1. A cover assembly for a magnetic resonance imaging device, the magnetic resonance imaging device comprising an inner cylinder (10), characterized in that: The cover assembly comprises: an end cover (20) for covering the outer peripheral space (P) of the inner cylinder (10) in a direction parallel to the axial direction (A) of the inner cylinder (10), wherein a gap (G) is spaced between the end cover (20) and the inner cylinder (10) in the axial direction (A); and A gap sealing member (30) is elastic and is used to connect the end cover (20) and the inner cylinder (10) and to seal the gap (G).

2. The cover assembly of the magnetic resonance imaging apparatus according to claim 1, wherein: The gap sealing member (30) comprises: a penetration portion (31) for penetrating the gap (G); a cover attaching portion (32) which is arranged on a side of the end cover (20) facing the peripheral space (P) and is shaped so as to be attached to the end cover (20), and one end of the penetration portion (31) passing through the slit (G) is connected to the cover attaching portion (32); and A tube attaching portion (33) is used to be arranged on the inner side of the inner tube (10) and its shape is set to be able to attach to the inner tube (10), and the other end of the penetration portion (31) passing through the gap (G) is connected to the tube attaching portion (33).

3. The cover assembly of the magnetic resonance imaging apparatus according to claim 2, characterized in that The gap sealing member (30) can make the tube attachment portion (33) adhere to the inner tube (10) through its own elastic restoring force.

4. The cover assembly of the magnetic resonance imaging apparatus according to claim 3, characterized in that The gap sealing member (30) is an elastic body formed in one step.

5. The cover assembly of the magnetic resonance imaging apparatus according to claim 2, characterized in that The gap sealing member (30) further comprises a first lip portion (34), wherein the first lip portion (34) is connected to the penetration portion (31) and is used to adhere to the surface of the end cover (20) which faces away from the peripheral space (P), and the cover attachment portion (32), the penetration portion (31) and the first lip portion (34) together wrap around the edge of the end cover (20).

6. The cover assembly of the magnetic resonance imaging apparatus according to claim 5, characterized in that The end of the first lip (34) gradually becomes thinner.

7. The cover assembly of the magnetic resonance imaging apparatus according to claim 2, characterized in that The inner surface of the inner cylinder (10) near the gap (G) is recessed to form a step (11), and the cylinder attachment portion (33) is used to attach to the lower step surface (12) formed by the recess of the step (11). The gap sealing member (30) also includes a second lip (35), which is connected to the end of the cylinder attachment portion (33) along the axial direction (A) and is used to attach to the upper step surface (13) of the step (11).

8. The cover assembly of the magnetic resonance imaging apparatus according to claim 7, characterized in that The end of the second lip (35) gradually becomes thinner.

9. The cover assembly of the magnetic resonance imaging apparatus according to claim 2, wherein: The cover attaching portion (32) is adhered to the end cover (20) by means of an adhesive.

10. A magnetic resonance imaging device, characterized in that include: An inner cylinder (10), whose outer peripheral space (P) is used to accommodate a main magnet and a gradient coil of a magnetic resonance imaging device, and whose inner space is used to accommodate a subject during a magnetic resonance imaging process; as well as A cover assembly as claimed in any one of claims 1 to 9, wherein the end cover (20) is used to cover the outer peripheral space (P) of the inner cylinder (10) along a direction parallel to the axial direction (A) of the inner cylinder (10), the end cover (20) and the inner cylinder (10) are separated by a gap (G) along the axial direction (A), and the gap sealing member (30) is used to connect the end cover (20) and the inner cylinder (10) and close the gap (G).

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