Wang G, Snyder D L, Vannier M W
Mallinckrodt Institute of Radiology, Washington University, Saint Louis, MO 63110, USA.
Scanning. 1996 Nov;18(8):582-8. doi: 10.1002/sca.4950180808.
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.
X射线计算机断层扫描是一种主要的成像方式。一种迭代去模糊方法适用于平行束和锥束几何结构中的局部重建，仅利用穿过感兴趣区域的X射线。在无噪声和有噪声投影数据的数值模拟中证明了其可行性。迭代去模糊方法具有保持非负性、单调收敛和最小化Csiszàr的I散度的理论优势。
