Technical Program

Paper Detail

Paper:	TH-PM-PS2.9
Session:	Diffusion Tensor Imaging
Time:	Thursday, April 6, 15:20 - 16:40
Presentation:	Poster
Title:	A Fast and Robust ODF Estimation Algorithm in Q-Ball Imaging
Authors:	Maxime Descoteaux; INRIA Sophia Antipolis
	Elaine Angelino; Harvard University
	Shaun Fitzgibbons; Harvard University
	Rachid Deriche; INRIA Sophia Antipolis
Abstract:	We propose a simple and straightforward analytic solution for the Q-ball reconstruction of the diffusion orientation distribution function (ODF) of the underlying fiber population. First, the signal is modeled with a high order spherical harmonic series using a Laplace-Beltrami regularization method which leads to an elegant mathematical simplification of the Funk-Radon transform using the Funk-Hecke formula. In doing so, we obtain a fast and robust model-free ODF approximation. We validate the accuracy of the estimation quantitatively against synthetic data generated from the multi-tensor model and show that our estimated ODF can recover known multiple fiber regions in a biological phantom and in the human brain.

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