  There has been devoted significant mathematical research to model the light
propagation in tissue and to recover the absorption and scattering coefficients
after photoacoustic inversion. Typically, the basic light propagation models
considered there are the diffusion limits of the radiative heat transfer model.
These equations are well suited for models where the elastic scattering is the
dominant effect. If, however, the scattering is less pronounced, a single
scattering approximation model is practicable. As we show in this paper, this
approach is practically relevant in focused/sectional photoacoustic imaging. In
this paper, we study analytical reconstruction formulas for the single
scattering case. To realise the single scattering approach, we propose concrete
physical experiments based on photoacoustical sectional imaging.
