空间频域成像中辐射输运方程的衰减特性和光学参数识别
Decay behavior and optical parameter identification for spatial-frequency domain imaging by the radiative transport equation
摘要：
研究了空频域成像中比强度的衰减特性。它示出使用辐射输运方程的衰变是由不同的衰变模式的叠加，和这些模式的衰变率由空间频率和情况下的特征值。这就解释了为什么SFDI可以专注于浅水区。具有非零空间频率的光快速衰减的事实使得可以专门提取分层介质的顶层的光学特性。我们确定的光学性能的固体幻影的顶层。用不同分层介质的数值模型验证了这种测量方法。
英文摘要：
The decay behavior of the specific intensity is studied for the spatial-frequency domain imaging (SFDI). It is shown using the radiative transport equation that the decay is given by a superposition of different decay modes, and the decay rates of these modes are determined by spatial frequencies and Case's eigenvalues. This explains why SFDI can focus on shallow regions. The fact that light with nonzero spatial frequency rapidly decays makes it possible to exclusively extract optical properties of the top layer of a layered medium. We determine optical properties of the top layer of a solid phantom. This measurement is verified with different layered media of numerical phantoms.
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