Fiber Tracking in q-Ball Fields Using Regularized Particle Trajectories

Abstract. Most of the approaches dedicated to fiber tracking from diffusionweighted MR data rely on a tensor model. However, the tensor model can only resolve a single fiber orientation within each imaging voxel. New emerging approaches have been proposed to obtain a better representation of the diffusion process occurring in fiber crossing. In this paper, we adapt a tracking algorithm to the q-ball representation, which results from a spherical Radon transform of high angular resolution data. This algorithm is based on a Monte-Carlo strategy, using regularized particle trajectories to sample the white matter geometry. The method is validated using a phantom of bundle crossing made up of haemodialysis fibers. The method is also applied to the detection of the auditory tract in three human subjects.

• Type: Conference
• Year: 2005
• Where: IPMI
• Authors: Muriel Perrin, Cyril Poupon, Yann Cointepas, Bernard Rieul, Narly Golestani, Christopher Pallier, Denis Rivière, André Constantinesco, Denis Le Bihan, Jean-Francois Mangin
• Keywords: IPMI 2005, Medical Imaging, Single Fiber Orientation, Spherical Radon Transform, Tensor Model