Figure 1.

Diagram of the optical system used for the determination of the optical transmission and the differential pathlength in rat aorta, which were used to compensate photorelaxant responses for internal tissue filtering. Determination of these factors was achieved by measurements of the integrated transmittance (A), diffuse reflectance (B), and collimated transmittance (C) of the sample, and data were processed by using software that simulates the transport of photons via a Monte Carlo technique.