Multi-Modal Non-Rigid Registration Using a Stochastic Gradient Approximation

We present a new fast implementation of a non-rigid registration algorithm, based on a finite element elastic deformation model using the mutual information metric with a linear elastic regularization constraint. The algorithm was parallelized for symmetric multi-processor architectures. A Simultaneous Perturbation Stochastic Approximation (SPSA) optimization scheme was used to maximize the objective function. This algorithm was applied to capture non-rigid deformations of pre-procedural to post-procedural images of tumor Radio-Frequency (RF) ablation in the liver and nonrigid deformationsof intra-operative to pre-operativeprostate images.

• Type: Conference
• Year: 2004
• Where: ISBI
• Authors: Aloys du Bois d'Aische, Benoît Macq, Florian Kipfmueller, Mathieu De Craene, Neil I. Weisenfeld, Simon K. Warfield, Steven Haker
• Keywords: Elastic Regularization Constraint, ISBI 2004, Medical Imaging, Non-rigid Deformations, Non-rigid Registration Algorithm