Filtered back projection method for corn-beam X-ray CT

X-ray computed tomography can provide clearly the internal structure of the cross-section of the human-body as the image of X-ray absorption coefficient. Though conventional CT provides only a transversal image of the body or organs of interest, three-dimensional structures of organs are needed for clinical diagnosis or radiation therapy planning. In this research we studied the reconstructing algorithm for divergent X-ray CT which can provide 3-D image with one rotational scan. As the results we have found a new deblurred filter function. The evaluation of the algorithm has been done by computer simulation. The fairly good reconstructing results have been achieved. (author)