Title: Multimodal image registration using mutual information Abstract: Mutual information is currently most effective matching criterion for mutual modal image registration. For two images, mutual information is a measure of how well one image explains the other, or vice versa and it is assumed to be maximal if the images are geometrically aligned. Maximization of MI is a very general and powerful criterion, because no assumptions are made regarding the nature of this dependence and no limiting constraints are imposed on the image content of the modalities involved Since MI based method was introduced in 1995 by both Viola and Wells and by Collignon as a measure for image matching, a bunch of research has been done to make it more efficient and extend to handle non-rigid motion. This talk will be a survey of MI-based methods.