Determination of the concentration scaling law of the scattering cefficient of water solutions of Intralipid at 832 nm by comparision between collimated measurement an Monte Carlo simulations

Background and Objectives: Intralipid (IP) is a scatterer
extensively used in the building of phantoms for
Biomedical Optics measurements. Recently, deviations
from the linearity have been shown for the concentration
scaling law of the scattering coefficient of IP water solutions
at visible wavelengths. In this work this scaling law was
determined at 832 nm.
Study Design/Materials and Methods: Space resolved
transmittance measurements of a laser beam at 832 nm
through water solutions of IP and ink were performed and
compared with the corresponding results of Monte Carlo
simulations.
Results: The comparison provides a quadratic dependence
of m0
s on the volume-to-volume scatterer concentration, CIP,
in the range of CIP values (0.0024deviations from the linear behavior are related to the
failure of the independent scatterer approximation.
Conclusion: The quadratic dependence of m0
s on CIP is in
agreement with recent results obtained by other groups
with different experimental techniques and is validated
by a recent theoretical work