使用能量探测器的透射层析成像交替最小化算法

Conference Record of the Thirty-Sixth Asilomar Conference on Signals, Systems and Computers, 2002. Pub Date : 2002-11-03 DOI:10.1109/ACSSC.2002.1197165

J. O’Sullivan, D. Snyder, B. Whiting

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引用次数: 11

摘要

透射层析成像的期望最小化算法被扩展到考虑被建模为集成入射x射线光子能量的探测器。所得算法保证了对数似然函数的单调递增。期望步和最大化步都以封闭形式给出。该公式是足够普遍的，它可以推广到其他能量依赖模型的探测器。

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Alternating minimization algorithms for transmission tomography using energy detectors

Expectation-minimization algorithms for transmission tomography are extended to account for detectors that are modeled as integrating the energy of the incident X-ray photons. The resulting algorithm is guaranteed to monotonically increase the log likelihood functional. Both the expectation step and the maximization step are given in closed form. The formulation is general enough that it can be extended to other energy-dependent models for the detectors.

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Conference Record of the Thirty-Sixth Asilomar Conference on Signals, Systems and Computers, 2002.

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