title: Fiber tracking in q-ball fields using regularized particle trajectories.
abstract: Most of the approaches dedicated to fiber tracking from diffusion-weighted 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.
authors.affiliation: Service Hospitalier Frédéric Joliot, CEA, 91401 Orsay, France. perrin@shfj.cea.fr
authors.forename: M
authors.initials: M
authors.lastname: Perrin
authors.forename: C
authors.initials: C
authors.lastname: Poupon
authors.forename: Y
authors.initials: Y
authors.lastname: Cointepas
authors.forename: B
authors.initials: B
authors.lastname: Rieul
authors.forename: N
authors.initials: N
authors.lastname: Golestani
authors.forename: C
authors.initials: C
authors.lastname: Pallier
authors.forename: D
authors.initials: D
authors.lastname: Rivière
authors.forename: A
authors.initials: A
authors.lastname: Constantinesco
authors.forename: D
authors.initials: D
authors.lastname: Le Bihan
authors.forename: J F
authors.initials: JF
authors.lastname: Mangin
mesh_terms: D000465:Algorithms; D001185:Artificial Intelligence; D001921:Brain / Q000166:cytology*; D038524:Diffusion Magnetic Resonance Imaging / Q000379:methods*; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D021621:Imaging, Three-Dimensional / Q000379:methods*; D009413:Nerve Fibers, Myelinated / Q000648:ultrastructure*; D010363:Pattern Recognition, Automated / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity