PDI-TOMO is a 3D tomography imaging tool that supplements the CHAMP output. It analyzes wave speeds (derived from arrival time data from the scans of all pairs of tubes) to yield a wave speed map of the entire shaft volume. Since concrete strength is related to wave speed, this analysis is useful in cases where CHA-W analysis reveals a defect but does not give a precise idea of its extent. For more information on 3D Tomographic Software, visit https://www.pile.com/products/champ-software/. Pile Dynamics, Inc. info@pile.com