1. A method of providing a three-dimensional image representation of an object, said object capable of detectably attenuating a signal resulting from scanning, comprising: a. scanning said object with a scanning-medium capable of producing a signal corresponding to a three-dimensional image of said object; and b. obtaining a signal corresponding to said three-dimensional image of said object; and c. supersampling said three-dimensional image signal to a degree greater than the highest spatial frequency of said signal.