1. A method of three-dimensional computerized tomography comprising the steps, not necessarily in order, of: (a) generating cone beam imaging energy; (b) passing the cone beam imaging energy through an object of interest; (c) detecting the cone beam imaging energy as attenuated by passage through the object of interest to provide cone beam data; (d) defining polar grid points on radial lines on a plurality of coaxial planes for which Radon data is sought; (e) defining a Radon circle on each of said plurality of planes; (f) calculating Radon derivative data using said cone beam data at each point of intersection between the Radon circle on a particular one of said planes and said radial lines; (g) storing Radon derivative data in a function bin corresponding to each of a plurality of derivative points on said radial lines of a particular plane; (h) repeating steps (f) and (g) for each of said planes; (i) repeating steps (f) to (h) for different relative positions of a source of said cone beam imaging energy and said object of interest until all relative positions for data acquisition have been utilized; (j) upon completion of storage of Radon derivative data in function bins for the plurality of derivative points, using the values stored in the function bins to provide reconstructed image data; and (k) displaying an image of the object of interest using said reconstructed image data.