X-ray and CAT scans were used as forensic techniques on IceMan. X-ray imaging allows for the visualization of bones and other dense structures in the body, which can provide information about injuries or diseases. CAT scans, also known as CT scans, use X-rays to create detailed cross-sectional images of the body, allowing for a more comprehensive examination of organs and tissues. These techniques were likely used to gather information about IceMan's physical condition, injuries, and possible cause of death.