CAT scans were developed to provide clearer 3D images of internal organs and tissues compared to traditional 2D x-rays. Godfrey Hounsfield and Allan Cormack invented the first CAT scanner, which used x-rays and computers to construct cross-sectional images of the body. Modern CAT scanners have advanced to include multiple rotating x-ray tubes and detectors that create a spiral scan, producing highly detailed 3D images that help doctors diagnose medical conditions and diseases. CAT scans are a non-invasive medical imaging technique that uses radiation to create cross-sectional views of the body.