Figure 4

Comparison of AμT-OCE with PS-OCT measurements for all 5 human subjects. Left column (panels (a), (d), (g), (j) and (m)) present AμT-OCE measurements of mechanical anisotropy in skin in human forearm body sites in vivo. Central column (panels (b), (e), (h), (k) and (n)) show optic axis maps integrated over the dermis obtained with PS-OCT, and the right column (panels (c), (f), (i), (l) and (p)) shows directivity patterns of optical polarization in dermis integrated over the dermis thickness at the same body sites. Both methods reveal a similar symmetry direction for all human subjects. Blue and red dashed lines in the left column correspond to the skin’s symmetry axis determined from AμT-OCE and PS-OCT, respectively. A triangular piece of black tape helped align PS-OCT coordinates relative to AμT-OCE measurements.