INTRODUCTION MR tractography methods depend on the accurate estimation of orientation distribution functions (ODFs) from diffusion MRI data. A new ODF estimation method called the Funk-Radon and Cosine Transform (FRACT) was recently introduced for this purpose [1]. The FRACT is a linear method that generalizes the previous Funk-Radon Transform (FRT) [2]. While the FRACT is as easy to characteri...

An estimator of the Orientation Probability Density Function (OPDF) of fiber tracts in the white matter of the brain from High Angular Resolution Diffusion data is presented. Unlike Q-Balls, which use the Funk-Radon transform to estimate the radial projection of the 3D Probability Density Function, the Jacobian of the spherical coordinates is included in the Funk-Radon approximation to the radi...

0