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Fast, Model-Free , Analytical ODF Reconstruction from the Q-Space Signal

Abstract : The orientation distribution function (ODF) is very important in diffusion MRI. There are two types of ODFs. One is proposed using radial projection in Q-ball imaging [7]. Another one is the marginal pdf proposed in diffusion spectrum imaging (DSI) [8]. Since the marginal pdf is much sharper and mathematically correct, it could be more useful. Recently some reconstruction methods were proposed for this kind of ODF [1, 6]. They are both based on mono-exponential model, globally or locally, which has some intrinsic modeling error [4]. Although the authors in [1] extended the mono-exponential model to multi-exponential model, this multi-exponential model needs to be estimated non-linearly for every voxel and only in some special sampling scheme it has a analytical solution. Here we give a model-free analytical reconstruction method based on the Spherical Polar Fourier expression of the signal. It can estimate the ODF fast and analytically from the signal.
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https://hal.inria.fr/inria-00497243
Contributor : Jian Cheng <>
Submitted on : Friday, July 2, 2010 - 6:44:58 PM
Last modification on : Tuesday, March 17, 2020 - 2:56:05 AM
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Jian Cheng, Aurobrata Ghosh, Tianzi Jiang, Rachid Deriche. Fast, Model-Free , Analytical ODF Reconstruction from the Q-Space Signal. the Sixteenth Annual Meeting of the Organization for Human Brain Mapping (OHBM), 2010, Barcelona, Spain. ⟨inria-00497243⟩

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