基于衰减校正的SPECT截断投影迭代重投影重建算法

1992 14th Annual International Conference of the IEEE Engineering in Medicine and Biology Society Pub Date : 1992-10-01 DOI:10.1109/IEMBS.1992.5762055

C. Riddell, M. Bourguignon, B. Bendriem, V. Frouin, A. Syrota

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引用次数: 1

摘要

当SPECT图被截断时，基于Radon变换的迭代重投影重建(IRR)算法无法恢复完整投影数据集的分布，即使在视场作为感兴趣区域时也是如此。然而，当衰减特性已知并在IRR方案中加入衰减校正时，可以在视场中恢复源分布，在对比衰减图的特殊情况下，甚至可以在区域外恢复源分布。

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Iterative Reprojection Reconstruction algorithm with attenuation correction applied to truncated projections in SPECT

When SPECT sinograms are truncated, the Iterative Reprojection Reconstruction (IRR) algorithm based on the Radon transform cannot restore the distribution that would be obtained with the complete projection data set, even in the field of view taken as a region of interest. Nevertheless, when the attenuation characteristics are known and an attenuation correction is incorporated in the IRR scheme, the source distribution can be recovered in the field of view and, in the particular case of a contrasted attenuation map, even outside the region.

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来源期刊

1992 14th Annual International Conference of the IEEE Engineering in Medicine and Biology Society

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