  Diffuse Optical Tomography (DOT) is a reliable and widespread technique for
monitoring qualitative changes in absorption inside highly scattering media. It
has been shown, however, that Acousto-Optic (AO) imaging can provide
significantly more qualitative information, without the need for inversion
algorithms, due to the spatial resolution afforded by ultrasound probing. In
this article, we show how, by using multiple-wavelength AO imaging, it is also
possible to perform quantitative measurements of absorber concentration inside
scattering media.
