There are a wealth of resources available online to help you understand nondestructive testing and how it can help your company.  Here are a few to get you started:

NDT Resource Center 

BAM, Germany
Federal Institute for Material Research and Testing
Radiological Methods, Division VIII.3

Iowa State University
Center for Nondestructive Evaluation, X-Ray Group

Robarts Research Institute, Ontario, Canada

The American Society for Nondestructive Testing

Canadian Institute for NDE

German Society for Nondestructive Testing