@article{prahl88b, author = {S. A. Prahl and A. J. Welch and M. P. Sartori and P. D. Henry and R. Roberts and G. L. Valderrama and K. Y. Jong and M. J. Berry}, title = {Optical Properties of Normal Human Aorta from 200 to 2200 Nanometers}, journal = {Lasers Surg. Med.}, year = {1988 abstract only}, volume = {8}, pages = {142}, abstract = {A spectrophotometer was used to measure transmission and reflection from thin samples of human aorta from 220 to 2200\,nm. Three measurements (collimated transmission, diffuse transmission, and diffuse reflection) at each wavelength allowed calculation of three optical parameters characterizing light transport (absorption, scattering, and anisotropy) for that wavelength. The optical properties of normal human aorta as a function of wavelength are reported. Normal human aorta was frozen and sliced with a freezing microtome to obtain sample thicknesses ranging from 25 to 300\,$\mu$m. The samples were sandwiched between glass slides and placed in the spectrophotometer equipped with an integrating sphere. Transmission and reflection were measured and the delta-Eddington approximation of the one-dimensional transport equation was iterated to determine the optical properties. Measurements on a sufficient number of samples allowed estimation of the variation of optical properties between subjects. Reflection from full thickness fresh aorta was measured and compared with predicted reflection using optical properties obtained from frozen samples.}, }