In 1955, Ian Donald made his first investigation of the use of ultrasound in medical diagnosis. At the research department of the boiler makers Babock and Wilcox at Renfrew, Scotland, he used an industrial ultrasonic metal flaw detector to image tumours from human organs. He knew sonar from his service in WW II. This was a similiar use of reflected ultrasound to image the internal structure of the sample tissues. With other engineers, he developed the idea to for practical applications in the hosital where he worked, including the life-saving diagnosis of a huge, easily removable, ovarian cyst in a woman who had been diagnosed by others as having inoperable stomach cancer which he published the in The Lancet (7 Jun 1958).«