Attenuation map estimation with SPECT emission data only.
Attenuation map estimation with SPECT emission data only.
复制标题
仅使用 SPECT 发射数据进行衰减图估计。
DOI：
10.1002/ima.20200
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发表时间：
2009
影响因子：
3.3
通讯作者：
Zeng,GengshengLawrence
中科院分区：
文献类型：
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作者：
Yan,Yan;Zeng,GengshengLawrence
如果在重建过程中考虑光子衰减，则可以很好地实现定量单光子发射计算机断层扫描。使用传输扫描是一种常见的方法。如果可以从发射数据中获得衰减图，则可以进行极大的简化。在本文中，我们提出了一种使用衰减 Radon 变换的数据一致性条件来估计衰减图的新方法。它基于使用迭代算法推导真实衰减图的恒定区域的边界。这种新方法通过蒙特卡罗模拟的衰减和散射效应进行了测试。 © 2009 Wiley periodicals, Inc. Int J Imaging Syst Technol, 19, 271–276, 2009
Quantitative single‐photon emission computed tomography can be well achieved if photon attenuation is taken into account in the reconstruction process. Using a transmission scan is a common approach. A dramatic simplification could be made if the attenuation map could be obtained from the emission data. In this article, we propose a new method to estimate the attenuation map using the data consistency conditions of the attenuated Radon transform. It is based on deriving boundaries of the constant regions of the true attenuation map using an iterative algorithm. This new method is tested by Monte Carlo simulations with the attenuation and scattering effects. © 2009 Wiley Periodicals, Inc. Int J Imaging Syst Technol, 19, 271–276, 2009