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Proceedings Paper

Volume-preserving correction of non-rigid registrations for the investigation of pleural thickening growth
Author(s): Peter Faltin; Thomas Kraus; Kraisorn Chaisaowong
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Paper Abstract

Pleural thickenings can be assessed using 3D CT-image data. A precise registration in the thickening regions is required for a detailed investigation of the volumetric thickening growth and to algorithmically combine image information from two points in time. For this purpose, a non-rigid registration, utilizing B-spline based deformations, is applied. This kind of deformation is computationally efficient; however it might induce volumetric compression in the image domain. For the assessment of growth, it is inevitable to guarantee volume-preservation. In this paper we suggest a new method to enforce this preservation during the registration process in selected image regions. In contrast to other volume-preserving approaches, this correction is independent of the preliminary chosen method to estimate the non-rigid registration. To reduce complexity in large scale cases, we additionally present a method to approximate the global correction by successively solving smaller sub-tasks. Finally we show that both methods reduce the compression induced by the deformation and also enhance the registration quality in terms of image similarity.

Paper Details

Date Published: 13 March 2013
PDF: 7 pages
Proc. SPIE 8669, Medical Imaging 2013: Image Processing, 86692R (13 March 2013); doi: 10.1117/12.2006797
Show Author Affiliations
Peter Faltin, RWTH Aachen Univ. (Germany)
Thomas Kraus, Univ. Hospital Aachen (Germany)
Kraisorn Chaisaowong, RWTH Aachen Univ. (Germany)
King Mongkut's Univ. of Technology North Bangkok (Thailand)

Published in SPIE Proceedings Vol. 8669:
Medical Imaging 2013: Image Processing
Sebastien Ourselin; David R. Haynor, Editor(s)

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