Book, 'Positioning in Radiography' by K.C. Clark, 3rd edition, London, 1942

Radiographers took the majority of X-rays. This was one of the first books specifically written for radiographers rather than doctors. It was published in 1939. It became hugely influential. Positioning in Radiography aimed to standardise the radiographic technique throughout hospitals. Most routine X-rays are now taken by professional radiographers. The interpretation remains the province of medically trained radiologists.

Positioning in Radiography was written by a woman, Kathleen Clark. This is unusual for standard medical texts of the period. Clark had a remarkable career. She was one of the first qualified radiographers and later co-founded the School of Radiography at London’s Royal Northern Hospital.