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Direct-current-based image reconstruction versus direct-current included or excluded frequency-domain reconstruction in diffuse optical tomography

机译：扩散光学层析成像中基于直流的图像重建与包含或排除的直流频域重建

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摘要

We study the level of image artifacts in optical tomography associated with measurement uncertainty under three reconstruction configurations, namely, by using only direct-current (DC), DC-excluded frequency-domain, and DC-included frequency-domain data. Analytic and synthetic studies demonstrate that, at the same level of measurement uncertainty typical to optical tomography, the ratio of the standard deviation of (mu)_(a) over (mu)_(a) reconstructed by DC only is at least 1.4 times lower than that by frequency-domain methods. The ratio of standard deviations of D (or (mu)_(s)~(')) over D (or (mu)_(s)~(')) reconstructed by DC only are slightly lower than those by frequency-domain methods. Frequency-domain reconstruction including DC generally outperforms that excluding DC, but as the amount of measurements increases, the difference between the two diminishes. Under the condition of a priori structural information, the performances of three reconstruction configurations are seemingly equivalent.
机译：我们研究了三种重建配置下光学层析成像中与测量不确定性相关的图像伪影的水平，即仅使用直流（DC），DC排除的频域和DC包括的频域数据。分析和综合研究表明，在光学断层扫描通常具有的相同测量不确定度水平下，仅用DC重建的μ_（a）与μ_（a）的标准偏差之比至少为1.4倍低于频域方法。仅DC重构的D（或μ_（s）〜（'））与D（或μ_（s）〜（'））的标准偏差之比仅略低于频域方法。包括DC在内的频域重构通常比不包括DC的性能要好，但是随着测量量的增加，两者之间的差异会减小。在先验结构信息的条件下，三个重构配置的性能似乎是等效的。

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