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Local computed tomography via iterative deblurring
G Wang1, D L Snyder, M W Vannier
1Mallinckrodt Institute of Radiology, Washington University, Saint Louis, MO 63110, USA. gwang@brian.wustl.edu
Scanning
|November 1, 1996
Abstract:
X-ray computed tomography is a major imaging modality. An iterative deblurring method is adapted for local reconstruction in parallel-beam and cone-beam geometries, utilizing only x-rays passing through a region of interest. The feasibility is demonstrated in numerical simulation with noise-free and noisy projection data. The iterative deblurring method has the theoretical advantages of maintaining nonnegativity, converging monotonically and minimizing Csiszàr's I-divergence.