✦ LIBER ✦
High field localized proton spectroscopy in small volumes: greatly improved localization and shimming using shielded strong gradients
✍ Scribed by Peter C. M. van Zijl; Chrit T. W. Moonen; Jeffry R. Alger; Jack S. Cohen; Scott A. Chesnick
- Publisher
- John Wiley and Sons
- Year
- 1989
- Tongue
- English
- Weight
- 565 KB
- Volume
- 10
- Category
- Article
- ISSN
- 0740-3194
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✦ Synopsis
The availability of shielded gradients facilitates accurate single-voxel spectroscopy. Exact localization (90-99%) of volumes as small as 2 x 2 x 2 mm is demonstrated using a modified stimulated echo sequence. Strong gradient pulses (up to 200 mT/m) are employed to clear the stimulated echo of unwanted magnetization, enabling superior (single-scan) shimming of the selected volume. In vivo and in vitro proton NMR results at 4.7 T are presented.