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

Multi-slice data acquisition method and magnetic resonance imaging method thereof

A technology of magnetic resonance imaging and data acquisition, which is applied in magnetic resonance measurement, measurement using an nuclear magnetic resonance imaging system, and measurement of magnetic variables, etc. It can solve problems such as artifacts or the reduction of signal-to-noise ratio in two-dimensional acquisition, and shorten the repetition time , short acquisition time, maintain the effect of signal-to-noise ratio and contrast

Active Publication Date: 2016-07-20
SIEMENS SHENZHEN MAGNETIC RESONANCE
View PDF9 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unless extremely long repetition times (TR) are used, crosstalk between slices can cause artifacts or degrade signal-to-noise ratios in 2D acquisitions
These phenomena are even more pronounced in the case of using TSE sequences

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
  • Multi-slice data acquisition method and magnetic resonance imaging method thereof
  • Multi-slice data acquisition method and magnetic resonance imaging method thereof
  • Multi-slice data acquisition method and magnetic resonance imaging method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] In order to make the purpose, technical solution and advantages of the present invention clearer, the following specific examples are given to further describe the present invention in detail.

[0043] There are various methods of reducing cross-interference. One, placing spatial gaps between adjacent slices: in the case of SINC pulses, gaps of up to 50% of the slice thickness are required to compensate for crosstalk; in the case of other optimized pulses, much smaller Gaps (about 10% of sheet thickness). Second, change the slice acquisition sequence and increase the effective gap (actual gap) between the sequentially excited slices: after acquiring the specified slice every other time (odd / even acquisition sequence), the longitudinal relaxation (T1) process can substantially The effect of cross-interference in the remaining slices can be reduced; in practice, the number of fractional acquisitions is usually set to 2, and an interleaved slice sequence is used to preven...

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 multi-slice data acquisition method and a magnetic resonance imaging method thereof. The multi-slice data acquisition and sequencing method includes the steps of determination and sequencing. According to the determination step, times-based acquisition quantity NC and slice data quantity NS of multi-slice data acquisition are determined. According to the sequencing step, an iterative odd-even sequencing method is adopted to arrange a multi-slice data acquisition sequence of each times-based acquisition according to an ideal number of iterations, wherein the ideal number of iterations is obtained from a plurality of numbers j of iterations to be determined of the iterative odd-even sequencing method according to the slice data quantity NS and the times-based acquisition quantity NC. With the multi-slice data acquisition method provided by the embodiments of the invention adopted, the slice data acquisition sequence can be optimized, so that cross interference and magnetization transfer can be significantly reduced.

Description

technical field [0001] The invention relates to the technical field of magnetic resonance imaging, in particular to a multi-slice data acquisition method of a magnetic resonance imaging system. Background technique [0002] Magnetic resonance imaging (Magnetic Resonance Imaging, MRI) is a technique that uses magnetic resonance phenomena for imaging. The principle of magnetic resonance phenomenon mainly includes: atomic nuclei containing a single number of protons, such as hydrogen nuclei widely present in the human body, the protons have spin motion, just like a small magnet, and the spin axis of these small magnets has no certain rules. External magnetic field, these small magnets will be rearranged according to the magnetic force lines of the external magnetic field, specifically in two directions parallel to or antiparallel to the magnetic force lines of the external magnetic field, and the above-mentioned direction parallel to the magnetic force lines of the external mag...

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): G01R33/56
CPCG01R33/4835
Inventor 刘薇孙治国
Owner SIEMENS SHENZHEN MAGNETIC RESONANCE
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