In the processing industries, it is well known that particle shape is an important factor that determines the behavior of particulate systems. For example, system properties of technological significance, including rheology, suspension stability, agglomeration, packing, permeability, etc., are affected by particle shape. In this regard, characterization and analysis of particle shape is essential for more detailed understanding and improved development of particulate processes. In general, it is clear that the behavior of these systems depends on the statistical characteristics of particle shape. Remarkably few techniques exist to predict the mechanical and hydrodynamic behavior of all irregularly shaped particle or a population of irregularly shaped particles for that matter. The lack of models and correlations can be attributed to the wide variety and complexity of particle shapes, the difficulty of defining shape descriptors suitable for modeling, the limitations of measuring shape, and the lack of classifying techniques to characterize particle shape. In this paper, we present information on how 3D particle shape can be measured, characterized, and analyzed using cone beam X-ray microtomography (XMT). (c) 2005 Elsevier B.V. All rights reserved.