Dynamic imaging with multiple resolutions along phase-encode and slice-select dimensions
✍ Scribed by Lawrence P. Panych; Lei Zhao; Ferenc A. Jolesz; Robert V. Mulkern
- Publisher
- John Wiley and Sons
- Year
- 2001
- Tongue
- English
- Weight
- 255 KB
- Volume
- 45
- Category
- Article
- ISSN
- 0740-3194
- DOI
- 10.1002/mrm.1126
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✦ Synopsis
An implementation is reported of an imaging method to obtain MUltiple Resolutions along Phase-encode and Slice-select dimensions (MURPS), which enables dynamic imaging of focal changes using a graded, multiresolution approach. MURPS allows one to trade spatial resolution in part of the volume for improved temporal resolution in dynamic imaging applications. A unique method of Hadamard slice encoding is used, enabling the varying of the phase encode and slice resolution while maintaining a constant effective TR throughout the entire 3-D volume. MURPS was implemented using a gradient-recalled echo sequence, and its utility was demonstrated for MR temperature monitoring. In this preliminary work, it has been shown that changes throughout a large volume can be effectively monitored in times that would normally only permit dynamic imaging in one or a very few slices.