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

Method for realizing single-voxel localized two-dimensional phase-sensitive J-decomposition spectrum

A technology of localized spectrum and spectral method, applied in the field of single-element localized two-dimensional phase-sensitive J-decomposition spectrum, can solve the problem of reducing signal resolution, etc., and achieve the effect of high resolution

Inactive Publication Date: 2018-10-19
XIAMEN UNIV
View PDF9 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the influence of phase modulation on the JPRESS spectrogram, the spectrogram has to be displayed in absolute value mode, which reduces the resolution of the signal

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
  • Method for realizing single-voxel localized two-dimensional phase-sensitive J-decomposition spectrum
  • Method for realizing single-voxel localized two-dimensional phase-sensitive J-decomposition spectrum
  • Method for realizing single-voxel localized two-dimensional phase-sensitive J-decomposition spectrum

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] Below in conjunction with accompanying drawing and implementation example, the present invention will be further described:

[0031] A method for realizing single voxel localized two-dimensional phase-sensitive J-decomposition spectroscopy, comprising the following steps:

[0032] 1) Collect the MRI image of the sample, and determine the single-pixel localization area;

[0033] 2) collecting a one-dimensional localization spectrum of the single-pixel localization region;

[0034] 3) Determine the signal spectrum width of the one-dimensional localized spectrogram;

[0035] 4) measure the pulse width time of the 90 ° hard pulse of the sample and the power corresponding to the pulse width;

[0036] 5) Use the signal spectral width center of the one-dimensional localized spectrogram as the excitation center frequency of the small-angle flip sweep pulse, determine the pulse width and sweep range of the sweep pulse, and ensure that the sweep range is 2 to 5 times the signal...

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 provides a method for realizing a single-voxel localized two-dimensional phase-sensitive J-decomposition spectrum. On the basis of a JPRESS sequence, a new sequence formed by a PYSCHE decoupling module formed by one pair of small-angle inverted sweep pulses and corresponding weak gradient fields and phased gradient fields is inserted before two 180-degree localized pulses, wherein the sequence is formed by N sequences formed at two sides of the 180-degree localized pulses before the PYSCHE decoupling module and P sequences formed at the two sides of the 180-degree localized pulses after the PYSCHE decoupling module during indirect dimensional evolution time; and the two-dimensional spectrum obtained by an N sequence experiment is overturned symmetrically along the indirect dimension F1=10 Hz and then the overturned two-dimensional spectrum is overlapped with a two-dimensional spectrum obtained by a P sequence experiment to obtain single-voxel localized two-dimensional phase-sensitive J-decomposition spectrum.

Description

technical field [0001] The invention relates to obtaining a two-dimensional localized J-decomposition spectrum on a nuclear magnetic resonance imaging instrument, in particular to a single-pixel localized two-dimensional phase-sensitive J-decomposition spectrum method that can be obtained by sampling on a nuclear magnetic resonance imaging instrument. Background technique [0002] Magnetic resonance localization (MRS) was developed in combination with nuclear magnetic resonance imaging (MRI) and nuclear magnetic resonance (NMR). Chemical composition and structure technology. Because MRS technology can realize non-invasive quantitative detection of selected tissues, it is an important bridge linking biochemical changes and disease pathology. At present, MRS technology has been used as a supplementary research tool of MRI technology, and has been widely used in clinical and medical research fields. Among them, point-resolved spectroscopy (Bottomley PA. Spatial Localization i...

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 Applications(China)
IPC IPC(8): G01R33/46A61B5/055
Inventor 林雁勤田丹陈忠
Owner XIAMEN UNIV
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