Abstract

. This paper offers a new fast algorithm for non-rigid Viscous Fluid Registration of medical images that is at least an order of magnitude faster than the previous method by Christensen et al. [4]. The core algorithm in the fluid registration method is based on a linear elastic deformation of the velocity field of the fluid. Using the linearity of this deformation we derive a convolution filter which we use in a scalespace framework. We also demonstrate that the 'demon'-based registration method of Thirion [13] can be seen as an approximation to the fluid registration method and point to possible problems. 1 Introduction Non-rigid registration of two medical images is performed by applying global and/or local transformations to one of the images (which we will call the template T ) in such a way that it matches the other image (the study S). It is important to understand that the aim of the transformation is to map the template completely onto the study in such a way that informatio...

Citations