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Proceedings Paper

A robust optimization strategy for intensity-based 2D/3D registration of knee implant models to single-plane fluoroscopy
Author(s): J. Hermans; P. Claes; J. Bellemans; D. Vandermeulen; P. Suetens
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Paper Abstract

During intensity-based 2D/3D registration of 3D CAD models of knee implant components to a calibrated single-plane fluoroscopy image, a similarity measure between the fluoroscopy and a rendering of the model onto the image plane is maximized w.r.t. the 3D pose parameters of the model. This work focuses on a robust strategy for finding this maximum by extending the standard Powell optimization algorithm with problem-specific knowledge. A combination of feature-based and intensity-based methods is proposed. At each iteration of the optimization process, feature information is used to compute an additional search direction along which the image-based similarity measure is maximized. Hence, the advantages of intensity-based registration (accuracy) and feature-based registration (robustness) are combined. The proposed method is compared with the standard Powell optimization strategy, using an image-based similarity measure only, on simulated fluoroscopy images. It is shown that the proposed method generally has higher accuracy, more robustness and a better convergence behavior. Although introduced for the registration of 3D CAD models of knee implant components to single-plane fluoroscopy images, the optimization strategy is easily extendible and applicable to other 2D/3D registration applications.

Paper Details

Date Published: 8 March 2007
PDF: 12 pages
Proc. SPIE 6512, Medical Imaging 2007: Image Processing, 651227 (8 March 2007); doi: 10.1117/12.708538
Show Author Affiliations
J. Hermans, Katholieke Univ. Leuven, Univ. Hospital Gasthuisberg (Belgium)
P. Claes, Katholieke Univ. Leuven, Univ. Hospital Gasthuisberg (Belgium)
J. Bellemans, Katholieke Univ. Leuven, Univ. Hospital Gasthuisberg (Belgium)
D. Vandermeulen, Katholieke Univ. Leuven, Univ. Hospital Gasthuisberg (Belgium)
P. Suetens, Katholieke Univ. Leuven, Univ. Hospital Gasthuisberg (Belgium)


Published in SPIE Proceedings Vol. 6512:
Medical Imaging 2007: Image Processing
Josien P. W. Pluim; Joseph M. Reinhardt, Editor(s)

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