title: Spatio-Temporal Regularization for Longitudinal Registration to Subject-Specific 3d Template.
abstract: Neurodegenerative diseases such as Alzheimer's disease present subtle anatomical brain changes before the appearance of clinical symptoms. Manual structure segmentation is long and tedious and although automatic methods exist, they are often performed in a cross-sectional manner where each time-point is analyzed independently. With such analysis methods, bias, error and longitudinal noise may be introduced. Noise due to MR scanners and other physiological effects may also introduce variability in the measurement. We propose to use 4D non-linear registration with spatio-temporal regularization to correct for potential longitudinal inconsistencies in the context of structure segmentation. The major contribution of this article is the use of individual template creation with spatio-temporal regularization of the deformation fields for each subject. We validate our method with different sets of real MRI data, compare it to available longitudinal methods such as FreeSurfer, SPM12, QUARC, TBM, and KNBSI, and demonstrate that spatially local temporal regularization yields more consistent rates of change of global structures resulting in better statistical power to detect significant changes over time and between populations.
authors: Montreal Neurological Institute, McGill University, Montréal, Canada.
authors: Nicolas
authors: N
authors: Guizard
authors: Montreal Neurological Institute, McGill University, Montréal, Canada.
authors: Vladimir S
authors: VS
authors: Fonov
authors: Montreal Neurological Institute, McGill University, Montréal, Canada; CENIR-ICM, Pitié Salpétrière, Paris, France.
authors: Daniel
authors: D
authors: García-Lorenzo
authors: Montreal Neurological Institute, McGill University, Montréal, Canada.
authors: Kunio
authors: K
authors: Nakamura
authors: Montreal Neurological Institute, McGill University, Montréal, Canada.
authors: Bérengère
authors: B
authors: Aubert-Broche
authors: Montreal Neurological Institute, McGill University, Montréal, Canada.
authors: D Louis
authors: DL
authors: Collins
mesh_terms: D000465:Algorithms; D000544:Alzheimer Disease / Q000473:pathology; D001921:Brain / Q000473:pathology*; D018450:Disease Progression; D006801:Humans; D021621:Imaging, Three-Dimensional / Q000379:methods*; D008137:Longitudinal Studies; D019636:Neurodegenerative Diseases / Q000473:pathology; D059906:Neuroimaging / Q000379:methods*; D013997:Time Factors