Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Designing method for gradient coil of self-shielding superconductive nuclear magnetic resonance imaging system

A technology of nuclear magnetic resonance imaging and design method, which can be used in computing, special data processing applications, instruments, etc., and can solve problems such as target magnetic field constraints

Inactive Publication Date: 2016-06-29
INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
View PDF1 Cites 34 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of unnecessary target magnetic field constraints in the existing self-shielding nuclear magnetic resonance imaging system design method, and propose a self-shielding superconducting nuclear magnetic resonance imaging system gradient coil design method

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
  • Designing method for gradient coil of self-shielding superconductive nuclear magnetic resonance imaging system
  • Designing method for gradient coil of self-shielding superconductive nuclear magnetic resonance imaging system
  • Designing method for gradient coil of self-shielding superconductive nuclear magnetic resonance imaging system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] The following is a design embodiment of the self-shielding superconducting nuclear magnetic resonance imaging system gradient coil applying the present invention, and its design process is as follows figure 1 shown. The main coil of the gradient coil is a cylinder with a radius of 0.32m and a length of 1.38m, and the shielding coil is a cylinder with a radius of 0.37m and a length of 1.48m. Its structure is as follows figure 2 shown. The gradient strength of the designed gradient coils is set to 30mT / m. The imaging area is a spherical area with a diameter of 0.5m, and the non-imaging area under the patient's bed is not considered in the discrete calculation, such as image 3 shown. The outer 5 Gauss stray field confinement area is a cylindrical surface with a radius of 0.45m and a length of 1.45m.

[0022] In the first step, the ma...

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 designing method for a gradient coil of a self-shielding superconductive nuclear magnetic resonance imaging system.The designing method comprises the steps that firstly, three-dimensional continuous triangular mesh dividing is performed on a main coil framework region and a shielding coil framework region, and an axial magnetic induction intensity coefficient matrix generated by mesh nodes in the main coil framework region and the shielding coil framework region on a target field point is calculated according to a boundary elements method; secondly, an optimization calculation model is built through a regularization method, wherein the optimization calculation model comprises two parts, the first part is deviation between the axial magnetic induction intensity generated by the mesh nodes in the main coil framework region and the shielding coil framework region on a target field point and the expected target magnetic induction intensity, the second part is the quadratic sum of the flow function curvature of the mesh nodes, and flow function values of the mesh nodes in the main coil framework region and the shielding coil framework region are obtained through solution; lastly, actual winding distribution of the gradient coil is obtained through a flow function method.

Description

technical field [0001] The invention relates to a design method for a gradient coil of a self-shielding superconducting nuclear magnetic resonance imaging system. Background technique [0002] The gradient coil is one of the components of the magnetic resonance imaging equipment, and its main function is to add another gradient magnetic field that increases (or decreases) according to the site on the main magnetic field, so as to spatially locate and encode the MRI signal. In actual work, the gradient coil system must provide at least three kinds of gradient magnetic fields, namely slice selection gradient, frequency encoding gradient and phase encoding gradient. The main indicators to measure the performance of gradient coils are imaging speed, resolution, noise level, etc. Improving the performance of gradient coils is of great significance to improving the performance of the entire nuclear magnetic resonance imaging system. [0003] The main goal of gradient coil design...

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
IPC IPC(8): G06F17/50
CPCG06F30/367
Inventor 胡洋王秋良
Owner INST OF ELECTRICAL ENG CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
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