Optimal femoral head contour segmentation in CT images using dynamic programming

Article type: Research Article

Authors: Marti, Gaëtan^{a; *} | Baur, Charles^a | Zambelli, Pierre-Yves^b

Affiliations: [a] IPR – LSRO – VRAI Group, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland. E-mail: gaetan.marti@epfl.ch, charles.baur@epfl.ch | [b] Hôpital Orthopédique de la Suisse Romande (HOSR), Av. Pierre-Decker 4, CH-1005 Lausanne, Switzerland. E-mail: Pierre-yves.Zambelli@hospvd.ch

Correspondence: [*] Corresponding author

Abstract: We present a new contour segmentation method for femoral head detection in CT images. The principal idea underlying our approach is to represent the contour using active rays. Each ray has internal energy (continuity and smoothness constraints), as well as external energy (image-oriented edges and global a-priori knowledge). The causal nature of this representation allows a globally optimal, non-iterative solution to be found using dynamic programming. Moreover, even pathological bone structures can be automatically segmented. Several clinical situations on pelvis CT scan with hip degenerative change shows that this approach is more efficient than conventional methods. In this paper, we describe our method and discuss how it can be used to create graphical 3D models of the hip that are suitable for preoperative planning.

DOI: 10.3233/THC-2004-12403

Journal: Technology and Health Care, vol. 12, no. 4, pp. 315-322, 2004