1. A medical imaging system, comprising: a C-arm unit having an x-ray source for generating x-rays and a receptor for obtaining image exposures from received x-rays, the C-arm moving the x-ray source and receptor along an image acquisition path between at least first and second exposure positions; an acquisition module for collecting a series of image exposures from the receptor including at least first and second image exposures obtained while said and receptor is located at said first and second exposure positions, respectively; a position detector for monitoring the position of said receptor and the position of a patient and producing position data; an image processor for constructing a three dimensional (3D) volumetric data set based on said series of image exposures and position data from multiple said position detector; and a display displaying images based on said three dimensional volumetric data set.