Paul Bateson
Paul Bateson (born August 24, 1940) is an American convicted murderer and former radiographer. He appeared as a radiologic technologist in a scene from the 1973 horror film The Exorcist, which was inspired when the film's director, William Friedkin, watched him perform a cerebral angiography the previous year. The scene, with a considerable amount of blood onscreen, was, for many viewers, the film's most disturbing scene; medical professionals have praised it for its realism.
Filmography

Mineshaft: The Cruising Murders
as Self (archive footage)
Mineshaft: The Cruising Murders
as Self (archive footage)

The History of 'Cruising'
as Self (archive footage)
The History of 'Cruising'
as Self (archive footage)

The Exorcist
as Radiologist's Assistant (uncredited)
The Exorcist
as Radiologist's Assistant (uncredited)