The goal of this study was to develop reliable technique for measuring optical properties of renal calculi. As the first step, the technique was tested on artificial (Bego) stones. Absorption coefficients and reduced scattering coefficients of samples at 1940 nm were evaluated from total transmittance and diffuse reflectance measurements using an Inverse Monte Carlo technique. Optical properties were determined before and after soaking samples in distilled water. Before soaking, samples had absorption coefficients of 0.12±0.03 /mm, and reduced scattering coefficients of 7.72±2.34 /mm. After soaking, absorption coefficients were 0.21±0.04 /mm, and reduced scattering coefficients were 8.53±3.90 /mm. Future studies aim to determine optical properties of natural stones.
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