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Sparse Scale-Space Decomposition of Volume Changes in Deformations Fields

Abstract : Anatomical changes like brain atrophy or growth are usually not homogeneous in space and across spatial scales, since they map di erently depending on the anatomical structures. Thus, the accurate analysis of volume changes from medical images requires to reliably localize and distinguish the spatial changes occurring at di erent scales, from voxel to regional level. We propose here a framework for the sparse probabilistic scale-space analysis of volume changes encoded by deformations. Our framework is based on the Helmoltz decomposition of vector fields. By scale-space analysis of the scalar pressure map associated to the irrotational component of the deformation, we robustly identify the areas of maximal volume changes, and we de ne a consistent sparse decomposition of the irrotational component. We show the e ectiveness of our framework in the challenging problem of detecting the progression of tumor growth, and in the group-wise analysis of the longitudinal atrophy in Alzheimer's disease.
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Contributor : Marco Lorenzi Connect in order to contact the contributor
Submitted on : Wednesday, July 17, 2013 - 4:31:14 PM
Last modification on : Friday, November 18, 2022 - 9:25:16 AM
Long-term archiving on: : Friday, October 18, 2013 - 4:36:09 AM


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Marco Lorenzi, Bjoern H. Menze, Marc Niethammer, Nicholas Ayache, Xavier Pennec. Sparse Scale-Space Decomposition of Volume Changes in Deformations Fields. Medical Image Computing and Computer Aided Intervention (MICCAI), Sep 2013, Nagoya, Japan. pp.328-335, ⟨10.1007/978-3-642-40763-5_41⟩. ⟨hal-00845758⟩



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