✦ LIBER ✦
Minimizing TE in moment-nulled or flow-encoded two-and three-dimensional gradient-echo imaging
✍ Scribed by Matt A. Bernstein; Ann Shimakawa; Norbert J. Pelc
- Publisher
- John Wiley and Sons
- Year
- 1992
- Tongue
- English
- Weight
- 535 KB
- Volume
- 2
- Category
- Article
- ISSN
- 1053-1807
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
A method for minimizing field‐echo delay in moment‐nulled gradient‐echo imaging is presented. Even though ramps are accounted for, the analysis yields simple closed‐form solutions. The method is then generalized to the section‐select waveform for three‐dimensional volume imaging and to flow encoding for phase‐contrast imaging. Three strategies for first‐moment selection in phase‐contrast imaging are discussed, including a new strategy that always yields the minimum echo delay. Trapezoidal and triangular gradient lobe shapes are analyzed.