WebMD
Medicine Net: Computerized Axial Tomography
This site from MedicineNet.com gives a CAT Scan description, why they're performed, risks, and patient preparation. A thoughrough explanation of the process is provided.
University of Colorado
University of Colorado: Physics 2000: Cat Scans
A CAT Scan is compared to cutting up a fruitcake on this basic, yet interesting site. This description of CAT Scans is intended for a younger audience and also offers links to the visible human project.