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Systematic noise compensation for simultaneous multislice acquisition using rosette trajectories (SMART).
- Source :
-
Magnetic resonance in medicine [Magn Reson Med] 1999 May; Vol. 41 (5), pp. 1073-6. - Publication Year :
- 1999
-
Abstract
- Simultaneous multislice acquisition using rosette trajectories (SMART) is a recently introduced functional magnetic resonance imaging pulse sequence that offers high-speed data acquisition by simultaneously exciting several slices. A drawback to its benefit of rapid acquisition is the cumulative effect of the systematic noise present in the off-resonant slices. In this work, a systematic noise compensation method is implemented to gauge the performance of the multislice SMART method versus a single-slice rosette method in a motor activation study. The normalized standard deviation of the noise-compensated image timecourse is reduced by 25% (single-slice rosette) and 62% (SMART), and the normalized volume of motor activation is increased by 25% (single-slice rosette) and 44% (SMART). The noise-compensated SMART method has an average timecourse standard deviation only 9% higher than the noise-compensated single-slice rosette method, while increasing the acquisition rate threefold.
Details
- Language :
- English
- ISSN :
- 0740-3194
- Volume :
- 41
- Issue :
- 5
- Database :
- MEDLINE
- Journal :
- Magnetic resonance in medicine
- Publication Type :
- Academic Journal
- Accession number :
- 10332892
- Full Text :
- https://doi.org/10.1002/(sici)1522-2594(199905)41:5<1073::aid-mrm28>3.0.co;2-5