Revisiting the Rytov approximation in diffuse optics and its applications for the inverse and forward problems.

ABSTRACT: We propose an overview of the Rytov approximation in diffuse optics of biological tissues, for the inverse and forward problems. First, we show a physical interpretation of the Rytov approximation as a type of partial pathlength (named fluence rate partial pathlength) which is distinct from the usual partial pathlength for reflectance measurements. Second, we study the accuracy of the Rytov approximation for the calculation of Jacobians considering absorption perturbations and reflectance measurements. For higher absorption and lower reduced scattering values the discrepancy between the true Jacobian (i.e., the reflectance partial pathlength) and that obtained with the Rytov approximation (i.e., the fluence rate partial pathlength) can be up to about 70% for diffusion theory calculations a

SUBMITTER: Sassaroli A 

PROVIDER: S-EPMC11682099 | biostudies-literature | 2024 Dec

REPOSITORIES: biostudies-literature