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.
Original language | English (US) |
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Pages (from-to) | 583-588 |
Number of pages | 6 |
Journal | Journal of Magnetic Resonance Imaging |
Volume | 2 |
Issue number | 5 |
DOIs | |
State | Published - 1992 |
Keywords
- Gradient waveforms
- Model, mathematical
- Phase imaging
- Pulse sequences
- Rapid imaging
- Three‐dimensional imaging
- Vascular studies
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging