Abstract #0977
Higher anisotropy in Diffusion Spectrum Imaging at longer diffusion times
Steven Baete 1,2 and Fernando Emilio Boada 1,2
1
Center for Biomedical Imaging, Dept. of
Radiology, NYU Langone Medical Center, New York, New
York, United States,
2
CAI2R,
Center for Advanced Imaging Innovation and Research, NYU
Langone Medical Center, New York, New York, United
States
Diffusion Spectrum Imaging (DSI) would benefit from
longer diffusion times as these lead to increased
anisotropy due to the restricted/hindered diffusion
orthogonal to the fiber bundles. Since longer diffusion
times are prohibitive in conventional spin echo
sequences due to the concomitant increase in SNR, we
investigated the use of a stimulated echo sequence which
counters the SNR loss. When comparing DSI datasets
acquired with spin echo and stimulated echo diffusion
sequences in vivo in a healthy volunteer on a clinical
3T scanner, an increase in anisotropy is noticeable at
longer diffusion times. This higher anisotropy might
improve fiber tracking results.
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