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PubMed · 10332892

Systematic noise compensation for simultaneous multislice acquisition using rosette trajectories (SMART).

S J Peltier·D C Noll
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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.

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ArtifactsBrainFingersFourier AnalysisHead MovementsHumansImage Processing, Computer-AssistedMagnetic Resonance ImagingMotor SkillsRegression AnalysisSignal Processing, Computer-AssistedComparative StudyJournal ArticleResearch Support, Non-U.S. Gov'tResearch Support, U.S. Gov't, P.H.S.

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BibTeXRIS

S J Peltier, D C Noll. 1999. Systematic noise compensation for simultaneous multislice acquisition using rosette trajectories (SMART).. https://doi.org/10.1002/(sici)1522-2594(199905)41%3A5%3C1073%3A%3Aaid-mrm28%3E3.0.co%3B2-5

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