Multitemporal Volume Registration for the Analysis of Rheumatoid Arthritis Evolution in the Wrist.

ABSTRACT: This paper describes a method based on an automatic segmentation process to coregister carpal bones of the same patient imaged at different time points. A rigid registration was chosen to avoid artificial bone deformations and to allow finding eventual differences in the bone shape due to erosion, disease regression, or other eventual pathological signs. The actual registration step is performed on the basis of principal inertial axes of each carpal bone volume, as estimated from the inertia matrix. In contrast to already published approaches, the proposed method suggests splitting the 3D rotation into successive rotations about one axis at a time (the so-called basic or elemental rotations). In such a way, singularity and ambiguity drawbacks affecting other classical methods, for instance

SUBMITTER: Ferretti R 

PROVIDER: S-EPMC5672126 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature