Physician interactive workstations with global cardiac voxel distribution visualization may also include one or more of a 3-D color scale image of a population of voxel in the heart and/or an electronic boundary-tracing tool configured to accept user input to electronically define at least one boundary...http://www.google.de/patents/US7907759?utm_source=gb-gplus-sharePatent US7907759 - Cardiac visualization systems for displaying 3-D images of cardiac voxel intensity distributions with optional physician interactive boundary tracing tools