投影视野受限的图像重建
Image Reconstruction with Limited Field of View
(Computer Tomography)设备的探头宽度有限可引起探头视野受限 (Limited Field of View, LFOV)， 由此产生的投影数据被截断。由被截断的投影数据进行图像重建产生截断膺像(Truncation Artifacts)。外插算法(Extrapolation)可以减小截断膺像。但此种算法常常会矫枉过正或校正不足。传统的重建重投影(Reconstruction Reprojection)迭代算法适合视角(Limited Angle of View) 受限的情况，但对视野受限情况并没有明显的优势。本文为CT投影视野受限的图像重建建立一个理论基础。由此可以对出一个新的迭代算法。
runcated projections can arise from a detector with limited field of view (LFOV). Truncation artifacts can be reduced with extrapolation methods; however the reconstructed images are often over-corrected or under-corrected. Traditional reconstruction reprojection algorithms are suitable for limited angle of view, but they have no significant advantage for LFOV. This paper builds a theory basis for image reconstruction with LFOV. From this theory a new iterative algorithm is developed.
杨新铁、赵双任
计算技术、计算机技术工程基础科学自动化技术、自动化技术设备
图像重建，投影，视野，截断，断层扫描，CT
runcation LFOV Tomography reconstruction projections CT
杨新铁,赵双任.投影视野受限的图像重建[EB/OL].(2005-11-18)[2025-08-16].http://www.paper.edu.cn/releasepaper/content/200511-255.点此复制
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