Reduced encoding of diffusion spectrum imaging with cross-term correction
Resource
Neural Engineering, 2003. Conference Proceedings. First International IEEE EMBS Conference on
Journal
International IEEE/EMBS Conference on Neural Engineering, NER
Journal Volume
2003-January
Pages
561 - 563
Date Issued
2003-03
Date
2003-03
Author(s)
Abstract
Diffusion Spectrum MRI (DSI) has been demonstrated to be capable of defining orientations of intersecting fibers accurately. However, the scanning procedure is overly time-consuming under the current sampling scheme. We developed a reduced encoding scheme of DSI and proved that decreasing the acquisition points to 62% is feasible by diffusion cross-term correction. We calculated the diffusion cross-term from the acquired data in the center of q space by assuming that image corresponding to any diffusion encoding direction suffers b values from diffusion gradients, imaging gradients and the cross-term between diffusion gradients and imaging gradients. The data in outer q space was then corrected with diffusion cross-term and filled by the data acquired with opposite diffusion gradients according to the geometric symmetry of diffusion anisotropy. Both ex-vivo crossing capillaries phantom and ex-vivo rat brain models showed that this method can decrease DSI acquisition time while preserving the patterns and orientations of probability density function.
Event(s)
1st International IEEE EMBS Conference on Neural Engineering
Type
conference paper
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