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Abstract #1369

SMS-EPI real-time motion correction by receiver phase compensation and coil sensitivity interpolation

Bo Li1, Ningzhi Li2, Ze Wang1, and Thomas Ernst1
1Department of Diagnostic Radiology and Nuclear Medicine, University of Maryland, Baltimore, Baltimore, MD, United States, 2U.S. Food Drug Administration, Silver Spring, MD, United States

We investigated SMS-EPI real-time motion correction using phase compensation and SMS reconstruction with coil sensitivity interpolation for severe movements. A prospective motion correction system was used to provide motion information and update sequence parameters in real time. The receiver phase needs to match the cycled phase variation, and, when motion updates alter slice positions, an additional phase modulation is required. Coil sensitivity was initially calculated using single-slice reference images and then recalculated by spline interpolation for new slice position. Split slice-GRAPPA and SENSE with updated coil sensitivity maps show significantly improved results.

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