We acknowledge the financial support of the Medical Research Council of Canada, the FCAR du Quebec, and ISG Technologies Inc. and technical support from Stereographics Corp. Thanks are also due to our colleagues Majd Bakar, Louis Collins, Jose Espinosa, Alan Evans and Bruce Pike,. The applications discussed here are all developed using ISG's Imaging Applications Platform (IAP), a development and run-time package for interactive 3-D imaging applications.