Self-navigated interleaved spiral (SNAILS): application to high-resolution diffusion tensor imaging.
Chunlei Liu, Roland Bammer, Dong-Hyun Kim, Michael E Moseley
Magn Reson Med | Published : 2004
A fat-saturated twice-refocused spin echo sequence was implemented on a GE Signa 1.5-T whole-body system for diffusion-weighted imaging. Data were acquired using an analytically designed interleaved variable-density (VD) spiral readout trajectory. This flexible design algorithm allowed real-time prescription on the scanner. Each interleaf of the VD spiral oversampled the center of k-space. The oversampling provided an inherent motion compensation capability. The resultant diffusion-weighted images showed good quality without any retrospective motion correction. An iterated motion correction algorithm was developed to further reduce the signal cancellation artifact caused by motion-induced ph..View full abstract