Laser-induced photoacoustic signal phase study of stratum corneum and epidermis
Abstract
Laser-induced photoacoustic signal phase was employed for measurements of opothermal parameters of pig abdomen stratum corneum and epidermis. The non-radiative relaxation time was found to be 28 ms and the thermal diffusion time was 370 ms, yielding a thermal diffusivity value of (4.1 ± 0.8)× 10–4 cm2 s–1. This value compares well with other literature values for skin obtained using photothermal techniques.