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首页> 外文会议>International Conference on Imaging Science,Systems,and Technology CISST'99 Une 28-July 1, 1999 Las Vegas, Nevada, USA >The effectiveness of FBP algorithm and angular interpolation integrated for incomplete projection data
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The effectiveness of FBP algorithm and angular interpolation integrated for incomplete projection data

机译：FBP算法和角度插值对不完整投影数据的集成效果

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摘要

The filtered-backprojection (FBP) algorithm is used in almost all applications of parallel projections tomogrpahy except in the field of reconstruction fromn incomplete projection data, which is of a great interest in engineering. This paper shows that it is feasible to use FBP in reconstruction from limited views when the targets. are smooth and error tolerable. The study reveals two advantages of using FBP for smooth targets besides its speediness and accuracy: one is the maximum value of the target distribution can be obtained fast from a few projections; the other is that the FBP keeps practical accuracy when there are more than about 10 projections available, and the FBP becomes useless only when there are a few projhections available. In such case, integrating an angular interpolation into FBP can improve the accuracy significantly, for which there is a turning point around 14 projections. The results inspirits wider use of FBP in engineering.
机译：过滤反投影（FBP）算法几乎用于平行投影的所有应用，除了在不完整投影数据的重建领域中，这在工程学中引起了极大的兴趣。本文表明在目标有限的情况下，将FBP用于重建是可行的。平滑且容错。该研究揭示了使用FBP进行平滑目标的两个优点，除了它的快速性和准确性外，其一是可以从几个投影中快速获得目标分布的最大值。另一个是当有大约10个以上的可用投影时，FBP保持实用的准确性，而只有在有几个投影可用时，FBP才变得无用。在这种情况下，将角度插值集成到FBP中可以显着提高精度，为此，在14个投影周围有一个转折点。结果激发了FBP在工程中的广泛应用。

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