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Online orientation distribution function reconstruction in constant solid angle and its application to motion detection in HARDI

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6 Author(s)
Caruyer, E. ; Athena Project-Team, INRIA Sophia Antipolis - Mediterranee, Sophia Antipolis, France ; Aganj, I. ; Muetzel, R.L. ; Lenglet, C.
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The diffusion orientation distribution function é can be reconstructed from q-ball imaging (QBI) to map the complex intravoxel structure of water diffusion. As acquisition time is particularly large for high angular resolution diffusion imaging (HARDI), fast estimation algorithms have recently been proposed, as an on-line feedback on the reconstruction accuracy. Thus the acquisition could be stopped or continued on demand. We adapt these real-time algorithms to the mathematically correct definition of ODF in constant solid angle (CSA), and develop a motion detection algorithm upon this reconstruction. Results of improved fiber crossing detection by CSA ODF are shown, and motion detection was implemented and tested in vivo.

Published in:

Biomedical Imaging: From Nano to Macro, 2010 IEEE International Symposium on

Date of Conference:

14-17 April 2010