Correcting method for quick-speed spin echo pulse sequence and uses thereof
A technology of pulse sequence and spin echo, which is applied in application, medical science, diagnosis, etc., can solve the problem of image quality impact and achieve the effect of solving artifacts
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0063] The correction method of the fast spin echo pulse sequence provided by the present invention comprises the following sequential steps:
[0064] A. Use the FSE pulse sequence to scan, and correct the amplitude value of the phase gradient pulse in the "reading direction" according to the position of the peak point of the first echo signal in the echo chain;
[0065] B. Use the amplitude value of the corrected dephased gradient pulse to perform FSE pulse sequence scanning, and correct the amplitude value of the read gradient pulse according to the position of the second echo signal peak point in the echo chain;
[0066] C. Use the amplitude value of the corrected dephase gradient pulse and the corrected amplitude value of the read gradient pulse to perform FSE pulse sequence scanning, and correct the phase of the inverted radio frequency pulse according to the phase of all echo signal peak points in the echo chain;
[0067] D. Use the amplitude value of the corrected depha...
Embodiment 2
[0104] The only difference between this embodiment and Embodiment 1 is that the phase correction process of the inverted radio frequency pulse operates in the following order:
[0105] 1) Execute the FSE pulse sequence shown in FIG. 2 , wherein the amplitude value of the dephasing gradient pulse 241 adopts the corrected GA4, and the amplitude value of the read gradient pulse 243 adopts the corrected GA6. Other sequence parameters are the same as those in Embodiment 1.
[0106] 2) Calculate the standard deviation σ of the peak point phase of the echo (not including the first echo) obtained in this sampling, if σ0 (σ 0 is the preset reference value), then go to step 5, otherwise go to step 3.
[0107] 3) If the frequency offset of the currently selected layer is FQ3, then the new frequency offset FQ3'=FQ3+δ (δ can be 5% of the initial value of FQ3), assign the value of FQ3' to FQ3, and execute again Figure 2 shows the FSE pulse sequence with the updated FQ3.
[0108] 4) Repeat...
PUM
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
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