Effect of Order and Sharpening on Orientation Distribution Function for Identifying Fiber Orientations in Higher Order Tensor Model

Getaneh Bayu Tefera¹, Yuxiang Zhou¹, Ponnada A. Narayana¹

High angular resolution diffusion imaging (HARDI) data was analyzed using 4th and 6th order tensors. The orientation diffusion function (ODF) was deconvolved using spherical basis set with order 4 and 6. The performance of this method was demonstrated by performing tractography around the centrum semiovale regions and corpus callosum. Our results indicate that sixth order tensor, convolved with six basis functions is superior to the fourth order tensor in resolving multiple crossing fibers