CONE-BEAM RECONSTRUCTION OF PLATE-LIKE SPECIMENS

An x-ray shadow projection microscope using a scannable point source of x-rays is under development at AMIL-ARTS, SUNY at Buffalo. Considering the characteristics of the x-ray microscope of AMIL-ARTS and the limitations of Feldkamp's cone-beam reconstruction algorithm, a general cone-beam image reconstruction algorithm has been developed. In x-ray microscopy, many specimens are plate-like. The reconstruction of a plate-like specimen appears to be a limited angle problem. A novel method is presented to reconstruct a plate-like specimen using the general cone-beam reconstruction algorithm. Shepp and Logan's head phantom is used in validating this method. A method for synthesizing projection data of ellipsoids is described. Typical simulation results are given.