  Tomograms are obtained as probability distributions and are used to
reconstruct a quantum state from experimentally measured values. We study the
evolution of tomograms for different quantum systems, both finite and infinite
dimensional. In realistic experimental conditions, the quantum states are
exposed to the ambient environment and hence subject to effects like
decoherence and dissipation, which are dealt with here, consistently, using the
formalism of open quantum systems. This is extremely relevant from the
perspective of experimental implementation and issues related to state
reconstruction in quantum computation and communication. These considerations
are also expected to affect the quasiprobability distribution obtained from
experimentally generated tomograms and nonclassicality observed from them.
