Image-based display of activation patterns derived from scattered electrodes

Presentation of electrophysiologic data, such as activation patterns, can take many forms, the most common of which are hand or machine-drawn isochronal maps. The authors present an image-based method which provides accurate matching between electrophysiologic data and the anatomic sites from which the data were derived. This method is linear, simple, and straightforward to implement, and presents results in a format which is easy to understand and interpret.