Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Magnetic resonance system with auxiliary shimming coil and shimming method

A shimming coil and magnetic resonance technology, which is applied to the magnetic resonance system and shimming field with auxiliary shimming coils, can solve problems such as high heat generation, limited coil homogenization of second-order items, and limited space on the inner wall of the magnet cylinder. Good shimming effect, reduced usage, high shimming effect

Active Publication Date: 2016-05-18
SHANGHAI UNITED IMAGING HEALTHCARE
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, due to the limited space on the inner wall of the magnet cylinder, in order not to occupy too much free space of the patient, the shim coil is often made very thin and cannot be wound with too many wires, so that the energizing current cannot be too large, otherwise the heat will be too high. Or simply do not use the shim coil, which limits the homogenization effect of the coil on the second-order term

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Magnetic resonance system with auxiliary shimming coil and shimming method
  • Magnetic resonance system with auxiliary shimming coil and shimming method
  • Magnetic resonance system with auxiliary shimming coil and shimming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0044]The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0045] figure 1 It is a schematic structural diagram of a magnetic resonance system with auxiliary shim coils in the present invention.

[0046] See figure 1 The magnetic resonance system provided by the present invention with auxiliary shimming coils includes a housing (not shown in the figure) and a magnet 1, the housing is arranged on the periphery of the magnet 1, and the inner wall of the magnet 1 is provided with a radio frequency coil and a gradient coil (not shown in the figure) , wherein the auxiliary shim coil 2 is an independent coil set separately from the radio frequency coil and the gradient coil, and the auxiliary shim coil 2 is respectively set on the front and rear end surfaces of the magnet 1 .

[0047] In the aforementioned magnetic resonance system with auxiliary shimming coils, at present most of the magnets 1 are mainly wound by s...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a magnetic resonance system having auxiliary shim coils and a shimming method thereof. The magnetic resonance system comprises a magnet; a radio frequency coil and a gradient coil are arranged at the inner wall of the magnet; and auxiliary shim coils are respectively arranged at the front end surface and the rear end surface of the magnet. According to the invention, because the auxiliary shim coils, the radio frequency coil and the gradient coil are respectively and independently arranged and the auxiliary shim coils are arranged at the front end surface and the rear end surface of the magnet, the shapes of the auxiliary shim coils and the power-on current can be arranged flexibly according to the shimming demand; limitation of the space and the gradient coil can be eliminated; and the excellent shimming effect can be realized and the using amount of magnetic materials during the shimming process can be effectively reduced.

Description

technical field [0001] The invention relates to a magnetic resonance system and a shimming method, in particular to a magnetic resonance system with an auxiliary shimming coil and a shimming method. Background technique [0002] The imaging area of ​​the MRI system (magnetic resonance imaging system) requires a uniformly distributed main magnetic field, but the actual magnetic field cannot be completely uniformly distributed. Therefore, it is necessary to perform shimming operations on the magnetic resonance system. Use a measuring instrument to measure the distribution of the main magnetic field in a certain area, and perform the Legendre polynomial expansion on the measured main magnetic field in the spherical coordinate system. The expansion polynomial is: [0003] B z ( r , θ , φ ) = Σ n ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/341G01R33/385
Inventor 杨绩文
Owner SHANGHAI UNITED IMAGING HEALTHCARE
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com