Xu Guan, Piao Daqing, Bunting Charles F, Dehghani Hamid
School of Electrical and Computer Engineering, Oklahoma State University, Stillwater, Oklahoma 74078, USA.
Appl Opt. 2010 Jun 1;49(16):3059-70. doi: 10.1364/AO.49.003059.
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.
我们研究了在三种重建配置下，光学层析成像中与测量不确定度相关的图像伪影水平，这三种配置分别是仅使用直流（DC）、排除直流的频域以及包含直流的频域数据。分析和综合研究表明，在光学层析成像典型的相同测量不确定度水平下，仅由直流重建的μ(a)的标准差与μ(a)的比值至少比频域方法低1.4倍。仅由直流重建的D（或μ(s)'）的标准差与D（或μ(s)'）的比值略低于频域方法。包含直流的频域重建通常优于排除直流的频域重建，但随着测量数量的增加，两者之间的差异会减小。在先验结构信息的条件下，三种重建配置的性能似乎相当。
