An integrated fiber-optic probe combined with support vector regression for fast estimation of optical properties of turbid media

作者：Zhou, Yang; Fu, Xiaping^*; Ying, Yibin; Fang, Zhenhuan

来源：Analytica Chimica Acta, 2015, 880: 122-129.

DOI：10.1016/j.aca.2015.04.048

• Optical properties
• Fiber-optic probe system
• Support vector regression
• Turbid media
• Diffuse reflectance

A fiber-optic probe system was developed to estimate the optical properties of turbid media based on spatially resolved diffuse reflectance. Because of the limitations in numerical calculation of radiative transfer equation (RTE), diffusion approximation (DA) and Monte Carlo simulations (MC), support vector regression (SVR) was introduced to model the relationship between diffuse reflectance values and optical properties. The SVR models of four collection fibers were trained by phantoms in calibration set with a wide range of optical properties which represented products of different applications, then the optical properties of phantoms in prediction set were predicted after an optimal searching on SVR models. The results indicated that the SVR model was capable of describing the relationship with little deviation in forward validation. The correlation coefficient (R) of reduced scattering coefficient mu(s)' and absorption coefficient mu(a) in the prediction set were 0.9907 and 0.9980, respectively. The root mean square errors of prediction (RMSEP) of mu(s)' and ma in inverse validation were 0.411 cm(-1) and 0.338 cm(-1), respectively. The results indicated that the integrated fiber-optic probe system combined with SVR model were suitable for fast and accurate estimation of optical properties of turbid media based on spatially resolved diffuse reflectance.

• 出版日期2015-6-23
• 单位浙江科技学院; 浙江大学