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Monte Carlo Simulation for Non-contact Diffuse Reflectance Spectra of Intestinal Tissue
Pages: 100-106
Year: Issue:  1
Journal: Acta Laser Biology Sinica

Keyword:  intestinal tissueMonte Carlo simulationnon-contact diffuse reflectance spectra;
Abstract: Monte Carlo simulation was applied to analyze the light distribution of the converging light beam in the ho-mogenous intestinal tissue model.The influence of the depth of focus,detection area and source-detector distance on the diffuse reflectance spectroscopy measurement were quantitatively investigated.The results show that the optimal focus depth of the non-contact spectrum system for the diagnosis of the intestinal lesions in situ is 0.1 cm.For the diffuse re-flectance spectroscopy measurement,the source-detector distance can be determined by the intensity of emission light and the response sensitivity of detector.0.06 cm is the optimal detection radius for correctly reflecting the change of the content of oxyhemoglobin and deoxygenated hemoglobin using diffuse reflectance spectroscopy.In order to reduce the influence on the spectrum caused by the change of detection depth,the apex angle of detection light cone should be constant.
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