(a) 3D LC-OCT image of human skin in vivo , represented in slice
view and (b) averaged intensity profile R (z ), showing mean
linear regression fit of each skin layer (epidermis – red, dermis –
blue) and a corresponding pairs of observables
(\(\rho^{\text{epi}},\ µ_{\text{eff}}^{\text{epi}}\) and\(\rho^{\text{der}},\ µ_{\text{eff}}^{\text{der}}\)). Dermal layer
parameter \(\rho^{\text{der}}\) deduced from the intercept with basal
membrane (z = ~150 µm) and corrected from epidermal
layer attenuation.