Allan MacLeod Cormack was a South African American physicist who won the 1979 Nobel Prize in Physiology or Medicine for his work on X-ray computed tomography (CT), a significant and unusual achievement since Cormack did not hold a doctoral degree in any scientific field.

Sir Godfrey Newbold Hounsfield was a British electrical engineer who shared the 1979 Nobel Prize for Physiology or Medicine with Allan MacLeod Cormack for his part in developing the diagnostic technique of X-ray computed tomography (CT).