Multispectral image processing means that several kinds of information, preferably spatial and spectral, have to be processed simultaneously. The reliable recording of these kinds of information causes usually losses of the time information which is often undesirable. However, if the selective element operation speed is high enough, as it takes place in the case of acousto-optic tunable filters application, the time information losses can be minimized. The interconnection between different kinds of the processed and transmitted information by means of the systems of images multispectral processing is considered, and such systems information productivity limitation are estimated. The influence of these limitations on the possibilities of such systems application for the problems of medical diagnostics is discussed.