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Image registration with sliding motion constraints for 4D CT motion correction

 
: Derksen, A.; Heldmann, S.; Polzin, T.; Berkels, B.

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Handels, H. ; Univ. Lübeck, Institut für Medizinische Informatik:
Bildverarbeitung für die Medizin 2015 : Algorithmen - Systeme - Anwendungen; Proceedings des Workshops vom 15. bis 17. März 2015 in Lübeck; BVM 2015
Berlin: Springer, 2015 (Informatik aktuell)
ISBN: 978-3-662-46223-2 (Print)
ISBN: 978-3-662-46224-9 (Online)
ISBN: 3-662-46223-0
S.335-340
Workshop Bildverarbeitung für die Medizin (BVM) <2015, Lübeck>
Englisch
Konferenzbeitrag
Fraunhofer MEVIS ()

Abstract
A common assumption in medical image registration is that the estimation of a globally continuous deformation field is plausible in reality. However, a sliding behavior of adjacent organ boundaries (e.g. lung and ribcage) cannot be described in a plausible way by a continuous deformation field. In this paper, we address this issue with a novel registration framework that explicitly models sliding of interfaces and can preserve discontinuities in the deformation field along predefined organ boundaries. Incorporated methods involve constrained nonlinear registration and a finite element discretization on unstructured tetrahedral meshes. Evaluation is based on the freely available DIR-Lab datasets.

: http://publica.fraunhofer.de/dokumente/N-442215.html