Reduce Encoding of Diffusion Spectrum Imaging with Cross-term Correction
Cho K, Yeh C, Chao Y, Lin C, Chen J
DEPT. OF ELECTRICAL ENGINEERING, NATIONAL TAIWAN UNIVERSITY
Diffusion spectrum imaging can define complex fiber structures accurately. However, the scanning procedure is time-consuming under current 515 data sampling scheme. Based on the property that diffusion echo signal is spherical symmetry, a reduced encoding scheme was proposed in this study. 515 encoding points were reconstructed from 298 hemi-spherical points in q-space posterior to cross-term correction calculated from pulse sequence. The results of coherent fiber, 45, and 90 crossing fibers phantom models showed angular error of 0o, 42.051.97, and 91.384.78, respectively. Applying cross-term correction, we demonstrated that DSI with half-spherical encoding points is feasible while preserving fiber orientations.