title: Joint T1 and brain fiber log-demons registration using currents to model geometry.
abstract: We present an extension of the diffeomorphic Geometric Demons algorithm which combines the iconic registration with geometric constraints. Our algorithm works in the log-domain space, so that one can efficiently compute the deformation field of the geometry. We represent the shape of objects of interest in the space of currents which is sensitive to both location and geometric structure of objects. Currents provides a distance between geometric structures that can be defined without specifying explicit point-to-point correspondences. We demonstrate this framework by registering simultaneously T1 images and 65 fiber bundles consistently extracted in 12 subjects and compare it against non-linear T1, tensor, and multi-modal T1 + Fractional Anisotropy (FA) registration algorithms. Results show the superiority of the Log-domain Geometric Demons over their purely iconic counterparts.
authors.affiliation: Parietal Team, INRIA Saclay-Ile-de-France, Saclay, France. viviana.siless@inria.fr
authors.forename: Viviana
authors.initials: V
authors.lastname: Siless
authors.forename: Joan
authors.initials: J
authors.lastname: Glaunès
authors.forename: Pamela
authors.initials: P
authors.lastname: Guevara
authors.forename: Jean-François
authors.initials: JF
authors.lastname: Mangin
authors.forename: Cyril
authors.initials: C
authors.lastname: Poupon
authors.forename: Denis
authors.initials: D
authors.lastname: Le Bihan
authors.forename: Bertrand
authors.initials: B
authors.lastname: Thirion
authors.forename: Pierre
authors.initials: P
authors.lastname: Fillard
mesh_terms: D000465:Algorithms; D001921:Brain / Q000166:cytology*; D056324:Diffusion Tensor Imaging / Q000379:methods*; D006801:Humans; D007089:Image Enhancement / Q000379:methods; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D009413:Nerve Fibers, Myelinated / Q000648:ultrastructure*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013382:Subtraction Technique