Spectral Imaging System for Diffusive Reflectance

生物組織的光學特性決定了光在其內部的亮度分佈與穿透行徑，對於許多生醫光學的應用而言，為了在效果與可能的傷害間取得平衡，需決定最佳的光源強度，而決定的依據就是組織的光學係數。此研究的目的是建立一套光譜影像量測系統，量測當單色光聚焦投射於散射物質表面時，光擴散反射回到表面的光度分佈影像，並使用蒙地卡羅數學模擬此類擴散反射的光度分佈影像，控制模型中的光吸收與光散射係數，以評估其對擴散反射影像的影響，而影像中心點的亮度與隨直徑增加的亮度衰減速率是適於評估光學係數的兩項特徵。

關鍵字

擴散反射；組織光學；光學係數；蒙地卡羅模擬

並列摘要

The light distribution and light path in a biological tissue is determined by its optical properties. In most applications of biomedical optics, the intensity of light source has to be well controlled to achieve the best effect and to prevent possible harm. The key factors for making decision are the optical properties. The purpose of this study is to build a spectral image measurement system to capture the diffusive reflectance image when monochromatic light is projected on the surface of a scattering media. A Monte Carlo model is also used to simulate the image of diffusive reflectance. The effect of absorption and scattering coefficients on the diffusive reflectance is studied by modifying their values in model. The reflectance intensity at the center position and the slope of radial intensity profile are features that can be used to evaluate the optical coefficients.

並列關鍵字

Diffusive reflection ； Tissue optics ； Optical coefficients ； Monte Carlo simulation

國際替代計量

Spectral Imaging System for Diffusive Reflectance

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