CN105548926B - Low-noise flat-panel MRI gradient coil and interface box - Google Patents
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- G01R33/385—Systems for generation, homogenisation or stabilisation of the main or gradient magnetic field using gradient magnetic field coils
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Abstract
本发明公开了一种低噪音平板MRI梯度线圈及接口盒，包括梯度线圈、真空波纹管和用户接口盒，所述梯度线圈内设有真空腔，所述真空腔内设有平面线圈、水冷结构和减震装置，真空腔上设有第一真空接口，所述用户接口盒上设有梯度线圈接口、水冷接口、温度检测接口、第二真空接口及真空抽气口，所述真空波纹管一端与第一真空接口连接，另一端与第二真空接口连接，本发明基于真空技术，阻断了噪音传播途径，超薄梯度的设计，为真空降噪结构节省出足够的空间。
The invention discloses a low-noise flat-panel MRI gradient coil and an interface box, which include a gradient coil, a vacuum bellows and a user interface box. The gradient coil is provided with a vacuum chamber, and the vacuum chamber is provided with a planar coil and a water-cooling structure. and a shock-absorbing device. The vacuum chamber is provided with a first vacuum interface. The user interface box is provided with a gradient coil interface, a water cooling interface, a temperature detection interface, a second vacuum interface and a vacuum exhaust port. One end of the vacuum bellows is connected to The first vacuum interface is connected, and the other end is connected to the second vacuum interface. This invention is based on vacuum technology and blocks the noise transmission path. The ultra-thin gradient design saves enough space for the vacuum noise reduction structure.
Description
技术领域：Technical areas:
本发明涉及MRI技术领域，具体为一种低噪音平板MRI梯度线圈及接口盒。The invention relates to the field of MRI technology, specifically a low-noise flat-panel MRI gradient coil and an interface box.
背景技术：Background technique:
梯度线圈是MRI（Magnetic Resonance Imaging）系统的核心部件之一，它的主要作用是将电能转化为磁能，提供磁共振系统扫描所需的编码磁场。在扫描过程中，由于梯度线圈的通电导体在磁场中受到洛伦兹力的作用引起振动，产生了很大的噪音，这种噪音严重影响了患者的体验，甚至对患者的听力造成影响。就目前的市场产品来讲，各MRI系统厂家的主要目标是将噪音控制在一定限度内，并没有从根本上解决噪音问题。The gradient coil is one of the core components of the MRI (Magnetic Resonance Imaging) system. Its main function is to convert electrical energy into magnetic energy and provide the encoding magnetic field required for magnetic resonance system scanning. During the scanning process, the energized conductor of the gradient coil vibrates due to the Lorentz force in the magnetic field, resulting in a large noise. This noise seriously affects the patient's experience and even affects the patient's hearing. As far as the current market products are concerned, the main goal of each MRI system manufacturer is to control the noise within a certain limit, and they have not fundamentally solved the noise problem.
通用电气公司的F·G·莱普等人在专利《Low Noise MRI Scanner》(ZL97115635.2，US 696077)中提到将超导梯度线圈安装于超导磁体真空腔中的方法，这种方法能够降低梯度噪音，但是又存在相当的应用难度，没有相关的产品。如何开发出一款方便应用的低噪音梯度线圈，用于降低对噪音敏感人群，特别是用于婴幼儿的MRI系统的噪音，本专利提出一种基于真空技术的低噪音平板MRI梯度线圈，不仅降低了梯度噪音，而且可替换传统梯度线圈。F.G. Lepp and others from General Electric Company mentioned in the patent "Low Noise MRI Scanner" (ZL97115635.2, US 696077) a method of installing a superconducting gradient coil in a superconducting magnet vacuum cavity. This method It can reduce gradient noise, but it is quite difficult to apply and there are no related products. How to develop a low-noise gradient coil that is easy to use and used to reduce the noise of MRI systems for people who are sensitive to noise, especially for infants and young children. This patent proposes a low-noise flat-panel MRI gradient coil based on vacuum technology, which not only Gradient noise is reduced and traditional gradient coils can be replaced.
本发明提出一种用于基于真空技术的低噪音MRI梯度线圈及其接口盒，通过在该接口盒上实现真空和电气接口，应用方便。The present invention proposes a low-noise MRI gradient coil and its interface box based on vacuum technology. By realizing vacuum and electrical interfaces on the interface box, the application is convenient.
发明内容：Contents of the invention:
针对上述问题，本发明要解决的技术问题是提供一种低噪音平板MRI梯度线圈及接口盒。In view of the above problems, the technical problem to be solved by the present invention is to provide a low-noise flat-panel MRI gradient coil and an interface box.
本发明的一种低噪音平板MRI梯度线圈及接口盒，包括梯度线圈、真空波纹管和用户接口盒，所述梯度线圈内设有真空腔，所述真空腔内设有平面线圈、水冷结构和减震装置，真空腔上设有第一真空接口，所述用户接口盒上设有梯度线圈接口、水冷接口、温度检测接口、第二真空接口及真空抽气口，所述真空波纹管一端与第一真空接口连接，另一端与第二真空接口连接。The present invention provides a low-noise flat-panel MRI gradient coil and interface box, which includes a gradient coil, a vacuum bellows and a user interface box. The gradient coil is provided with a vacuum chamber, and the vacuum chamber is provided with a planar coil, a water-cooling structure and a Shock absorbing device, the vacuum chamber is provided with a first vacuum interface, the user interface box is provided with a gradient coil interface, a water cooling interface, a temperature detection interface, a second vacuum interface and a vacuum exhaust port, and one end of the vacuum bellows is connected to the first vacuum port. One end is connected to the vacuum interface, and the other end is connected to the second vacuum interface.
优选的，所述平面线圈和水冷结构为整体结构且通过减震装置设于真空腔内。Preferably, the planar coil and the water-cooling structure are an integral structure and are installed in the vacuum chamber through a shock-absorbing device.
优选的，所述梯度线圈为圆柱体结构且设有2个，每个梯度线圈上设有的第一真空接口为一组3个，所述真空波纹管为一组3根。Preferably, the gradient coils have a cylindrical structure and are provided with two, each gradient coil is provided with a set of three first vacuum interfaces, and the vacuum bellows is a set of three.
优选的，所述用户接口盒为圆柱体结构，所述第二真空接口为2组共6个，所述梯度线圈接口为6个，所述水冷接口为2个。Preferably, the user interface box has a cylindrical structure, there are 2 groups of 6 second vacuum interfaces, 6 gradient coil interfaces, and 2 water cooling interfaces.
优选的，所述真空抽气口连接有真空阀门。Preferably, the vacuum exhaust port is connected to a vacuum valve.
本发明有益效果：本发明基于真空技术，阻断了噪音传播途径，兼顾扭力平衡设计，减少振动噪音；通过采用减振的装配方式，降低振动传导，具有温度控制系统，可以保持梯度线圈的工作温度；超薄梯度设计，为真空降噪结构节省出足够的空间，整体外形与传统梯度线圈相当，可以方便互换。Beneficial effects of the invention: This invention is based on vacuum technology, blocks the noise transmission path, takes into account the torsion balance design, and reduces vibration noise; by adopting a vibration-absorbing assembly method, it reduces vibration conduction, and has a temperature control system to maintain the work of the gradient coil Temperature; ultra-thin gradient design saves enough space for the vacuum noise reduction structure. The overall shape is equivalent to traditional gradient coils and can be easily interchanged.
附图说明：Picture description:
为了易于说明，本发明由下述的具体实施及附图作以详细描述。For ease of explanation, the present invention is described in detail by the following specific implementations and drawings.
图1是本发明整体结构示意图；Figure 1 is a schematic diagram of the overall structure of the present invention;
图2为梯度线圈内部结构示意图；Figure 2 is a schematic diagram of the internal structure of the gradient coil;
图3为用户接口盒结构示意图。Figure 3 is a schematic structural diagram of the user interface box.
图中：1-梯度线圈；2-真空波纹管；3-用户接口盒；4-平面线圈；5-水冷结构；6-减震装置；7-真空腔；8-梯度线圈接口；9-水冷接口；10-温度检测接口；11-第二真空接口；12-真空抽气口；13-第一真空接口。In the picture: 1-Gradient coil; 2-Vacuum bellows; 3-User interface box; 4-Planar coil; 5-Water cooling structure; 6-Shock absorbing device; 7-Vacuum chamber; 8-Gradient coil interface; 9-Water cooling interface; 10-temperature detection interface; 11-second vacuum interface; 12-vacuum exhaust port; 13-first vacuum interface.
具体实施方式：Detailed ways:
为使本发明的目的、技术方案和优点更加清楚明了，下面通过附图中示出的具体实施例来描述本发明。但是应该理解，这些描述只是示例性的，而并非要限制本发明的范围。此外，在以下说明中，省略了对公知结构和技术的描述，以避免不必要地混淆本发明的概念。In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described below through the specific embodiments shown in the drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the invention. Furthermore, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily confusing the concepts of the present invention.
如图1-3所示，本发明提供一种技术方案：一种低噪音平板MRI梯度线圈及接口盒，包括梯度线圈1、真空波纹管2和用户接口盒3，梯度线圈1内设有真空腔7，真空腔7内设有平面线圈4、水冷结构5和减震装置6，真空腔7上设有第一真空接口13，用户接口盒3上设有梯度线圈接口8、水冷接口9、温度检测接口10、第二真空接口11及真空抽气口12，真空波纹管2一端与第一真空接口13连接，另一端与第二真空接口11连接。As shown in Figures 1-3, the present invention provides a technical solution: a low-noise flat-panel MRI gradient coil and interface box, including a gradient coil 1, a vacuum bellows 2 and a user interface box 3. The gradient coil 1 is equipped with a vacuum Chamber 7. The vacuum chamber 7 is provided with a planar coil 4, a water-cooling structure 5 and a shock absorbing device 6. The vacuum chamber 7 is provided with a first vacuum interface 13. The user interface box 3 is provided with a gradient coil interface 8, a water-cooling interface 9, Temperature detection interface 10, second vacuum interface 11 and vacuum exhaust port 12, one end of the vacuum bellows 2 is connected to the first vacuum interface 13, and the other end is connected to the second vacuum interface 11.
具体地，平面线圈4和水冷结构5为整体结构且通过减震装置6设于真空腔7内；梯度线圈1为圆柱体结构且设有2个，每个梯度线圈1上设有的第一真空接口13为一组3个，每个梯度线圈1包含X、Y、Z三组线圈，所以有3路梯度信号线，均匀分布到3个第一真空接头13接出，每个接头中通过一路梯度信号。真空波纹管2为一组3根，用户接口盒为3圆柱体结构，实现了梯度线圈接口8、水冷接口9、温度检测接口10、第二真空接口11以及真空抽气口12，真空抽气口12连接有真空阀门。Specifically, the planar coil 4 and the water-cooling structure 5 are an integral structure and are installed in the vacuum chamber 7 through a shock absorbing device 6; the gradient coil 1 is a cylindrical structure and is provided with two, and each gradient coil 1 is provided with a first There are three vacuum interfaces 13 in a group. Each gradient coil 1 contains three groups of coils: A gradient signal. The vacuum bellows 2 are a set of three, and the user interface box has a three-cylinder structure, which implements the gradient coil interface 8, the water cooling interface 9, the temperature detection interface 10, the second vacuum interface 11 and the vacuum exhaust port 12. The vacuum exhaust port 12 A vacuum valve is connected.
其工作原理：在装配过程中，首先按照设计需求制造平面线圈4和水冷结构5，通过预先设计好的减震装置6将其安装于真空腔7中，形成了低噪音平面梯度的线圈部分，该真空腔7上有第一真空接口13（3个一组），通过真空波纹管2（3根一组）与用户接口盒3上的第二真空接口11连接，形成三条真空通道，这样形成了整个线圈的真空腔。Its working principle: During the assembly process, the planar coil 4 and the water-cooling structure 5 are first manufactured according to the design requirements, and are installed in the vacuum chamber 7 through the pre-designed shock absorber 6, forming a low-noise planar gradient coil part. There is a first vacuum interface 13 (a group of 3) on the vacuum chamber 7, which is connected to the second vacuum interface 11 on the user interface box 3 through a vacuum bellows 2 (a group of 3), forming three vacuum channels, thus forming The vacuum chamber of the entire coil.
在应用中，真空腔7通过真空波纹管2连接到用户接口盒3的第二真空接口11，形成真空通道，平面线圈4的电线、水冷结构5的水管和温度检测连线等均通过该通道进入用户接口盒3中，在用户接口盒3中完成电线、温度检测连线的连接和水管的连接，然后封闭该接口盒，形成一个真空腔体，从真空抽气口12抽出腔体内的空气，达到一定的真空度时关闭真空阀门，真空腔内处于真空状态，实现了真空腔7的隔离和对外接口。In application, the vacuum chamber 7 is connected to the second vacuum interface 11 of the user interface box 3 through the vacuum bellows 2, forming a vacuum channel through which the wires of the planar coil 4, the water pipes of the water-cooling structure 5, and the temperature detection connections pass. Enter the user interface box 3, complete the connection of wires, temperature detection cables and water pipes in the user interface box 3, then close the interface box to form a vacuum cavity, and extract the air in the cavity from the vacuum exhaust port 12. When a certain degree of vacuum is reached, the vacuum valve is closed, and the vacuum chamber is in a vacuum state, thereby realizing the isolation and external interface of the vacuum chamber 7 .
以上显示和描述了本发明的基本原理和主要特征和本发明的优点。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions only illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have other aspects. Various changes and modifications are possible, which fall within the scope of the claimed invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.
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Effective date of registration: 20220818 Address after: 1st Floor, Building 2, Changsha County Commercial Office Building, Intersection of Liangtang Road and Dongsheng Road (107 National Road), Xingsha Street, Changsha County, Changsha County, Changsha, Hunan Province 410000 Applicant after: HUNAN MAITAIKE MEDICAL TECHNOLOGY Co.,Ltd. Address before: No. 15, Shenzhou Road, Lukou Street, Jiangning District, Nanjing City, Jiangsu Province, 211113 Applicant before: NANJING CICHEN MEDICAL TECHNOLOGY Co.,Ltd. |
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Denomination of invention: A low-noise flat MRI gradient coil and interface box Granted publication date: 20230926 Pledgee: Changsha Bank Co.,Ltd. Science and Technology Innovation Branch Pledgor: HUNAN MAITAIKE MEDICAL TECHNOLOGY Co.,Ltd. Registration number: Y2024980053523 |
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