Abstract
A new method for ordering the phase-encoding gradient is proposed, and an application for short effective TE gradient- and spin-echo (GRASE) imaging is demonstrated. The proposed method calculates the phase-encoding order from the signal decay of a template scan (hence 'template interactive phase- encoding' or TIPE). Computer simulations are used to compare the point spread functions of different phase-encoding orders giving short effective echo times (kb centric GRASE, centric GRASE, centric TIPE). The conventional centric phase-encoding order is also considered for GRASE. The conventional centric method is sensitive to both amplitude and phase modulation of the signal in k-space. The centric TIPE method gives the least amplitude modulation artifacts but is vulnerable to phase artifacts. The TIPE experiment was implemented on a 3 Tesla system. To the best of our knowledge, we present the first in vivo GRASE images at this field strength.
| Original language | English |
|---|---|
| Pages (from-to) | 970-979 |
| Number of pages | 10 |
| Journal | Magnetic resonance in medicine |
| Volume | 39 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - Jun 1998 |
| Externally published | Yes |
Keywords
- GRASE
- High-field imaging
- Image artifacts
- Rapid imaging
- n/a OA procedure