The review illustrates selected applications of tomographic analysis applied to dry and wet particulate systems. The examples show the use of the method to gain information at different levels of inspection, such as the detailed structure of individual particles, structured particulate assemblies, and on the concentration and velocity of solids in a moving mixture. The utilization of the unique spatial information derived from tomography for the purpose of model validation, and, in some cases, for the monitoring and control of processes is discussed. Emerging applications show that utilization of tomographic methods can facilitate the creation of new and sophisticated models for particulate systems.