Apparatus and method for optical local resolution determination of density distributions in biological tissue

An apparatus for optically spatially resolving determination of density distributions in biological tissue with - a scanning unit, which move at the transmitting end a defined a localized beam of a radiation source (3, 23) enables the receiving end and the light transmitted through biological tissue in a spatially resolved radiation components is detected and - an evaluation unit (10, 100) on the basis of the registered via the scan unit accepts signals with spatial resolution localization of defined density distributions, characterized, in that - the scan unit enables a spatially and angularly resolved spatial registration of light transmitted through biological tissue radiation components of the radiation beam of the radiation source (3, 23) at the receiving end.