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Abstract #0349

Efficient, Robust, Nonlinear, and Guaranteed Positive Definite Diffusion Tensor Estimation

Cox R, Glen D
Department of Health and Human Services

We describe a method to estimate the diffusion tensor D directly from the nonlinear relationship between diffusion-weighted images and D. A modified gradient descent algorithm is used, one which ensures that D remains positive definite. Iterative reweighting is applied to remove outliers.