Allan Cormack

Godfrey Newbold Cormack (1924-1998), commonly known as Allan Cormack, was a South African-born American physicist whose groundbreaking theoretical work revolutionized medical imaging. Born in Cape Town, South Africa, Cormack studied physics at Cambridge University and later conducted research in nuclear physics. In the 1950s and 1960s, while working at Tufts University in Massachusetts, he developed the mathematical and physical principles necessary for reconstructing images from X-ray projections taken at different angles—work that proved fundamental to the invention of the CAT scanner. His theoretical contributions enabled the practical development of computed tomography, a technology that transformed medical diagnosis by allowing physicians to visualize internal body structures with unprecedented clarity and safety. In 1979, Cormack shared the Nobel Prize in Physiology or Medicine with Hounsfield, the engineer who built the first practical CAT scanner, in recognition of their complementary contributions to this life-saving technology. Beyond his Nobel Prize work, Cormack made contributions to nuclear and particle physics throughout his career. His legacy extends beyond individual discoveries; he exemplified how theoretical physics applied to practical medical problems can save countless lives.