[14a-PB2-1~15] 3.4 Biomedical optics

▲ [14a-PB2-3] Different volume fraction of absorbing and scattering agents producing similar spectral reflectance in agarose-gel skin phantom

Kaustav Das¹, Takaaki Maeda², Izumi Nishidate³, Tomonori Yuasa¹, Hideki Funamizu¹, 〇Yoshihisa Aizu¹ (1.Muroran Inst. Tech., 2.Kushiro National Col. Tech., 3.Tokyo Univ. Agri. Tech.)

Keywords:skin measurements, spectrarl reflectance

Spectral measurement of human skin has often been used to provide knowledge about skin conditions and sometimes physical condition mainly by analyzing spectral reflectance curve. Such analysis generates information about skin parameters, largely about absorption coefficient µa and scattering coefficient µs. Now, these µa and µs are used to evaluate pigments concentration (melanin and hemoglobin) and tissue morphological information. However, such an evaluation of µa and µs by reflectance spectra goes through unpredictability as some different values of µa and µs produce similar spectra. In this study, we investigate the phenomena of similar spectra from different µa and µs in 3-layered agarose-gel phantom and finally we confirm those divergent µa and µs values of phantoms by inverse Monte Carlo (IMC) method.