1. A method for interactively displaying three dimensional structures comprising the steps of: providing a three-dimensional volume of data representing at least one physical property associated with a three dimensional body; isolating a selected region of interest from the volume of data based on selected values of the physical property representing the selected region of interest; rendering the isolated region of interest as a surface rendered image in an interactive three-dimensional display; and displaying a volume-rendered image adjoining the surface-rendered image in an interactive three-dimensional display.