<P>PROBLEM TO BE SOLVED: To provide a method of computing the probability of the measured region of a subject corresponding to a fiber tract in specifying the fiber using MRI. <P>SOLUTION: A nervous system fiber tract atlas includes atlas voxels respectively representing different volume elements of the nervous system. A first atlas voxel represents a first volume element of the nervous system. The fiber tract atlas also includes information on orientations of the first fiber tract in the first volume element of the nervous system. Magnetic resonance data are obtained from the nervous system of the subject. The first data voxel relates to the first atlas voxel. A diffusion vector of the first data voxel is generated at least partially based on the obtained magnetic resonance data. The probability of the first data voxel representing the first fiber tract is found based on the diffusion vector generated using the fiber tract atlas and the information on the orientations of the first fiber tract in the first volume element. <P>COPYRIGHT: (C)2010,JPO&INPIT 
IDENTIFYING WHITE MATTER FIBER TRACT USING MAGNETIC RESONANCE IMAGING (MRI)