Friday, 1 October 2021

computerised axial tomography

On this day in 1971, the first CAT scan (nowadays usually referred to as a CT scan) was conducted at Wimbledon on an unidentified patient on a diagnostic machine developed by engineer Godfrey Hounsfield and physicist Allan MacLeod Cormack. The duo were recipients of the 1979 Nobel prize for their collaboration and the former is the namesake for the quantitative gauge of radiopacity—that is the ability of electromagnetic radiation to penetrate a media with air at -1000 HU (Housfield Units), water at the baseline of zero and bone set at +1000 at the other end of the spectrum, with identifiable values for various fats, tissues and ligaments.