[3][4] In April 1951, after completing school and making an exploratory visit to the company to meet the chief engineer, he joined Kelvin & Hughes Ltd at the time a Glasgow manufacturer of scientific instruments as a technical apprentice.

[5] It was while working in the Western Infirmary installing a bulb in an operating theatre that Brown found out that Donald was experimenting with the flaw detector.

[6] Rankin offered to gift the latest Mk IV Flaw Detector which was subsequently forwarded to Glasgow Central station from the Barkingside Labs location of Kelvin & Hughes, for delivery to Brown.

[4] In 1964 the Glasgow operation of Kelvin Hughes was the subject of a takeover bid by the aviation division of Smiths Industries.

[5] The design the group created was gradually evolved by them before it was transferred to Smith Industrials of England where it was improved by Brown, to become a commercial product known as the Diasonograph.

[4] In 1967, Brown left Honeywell to work at Nuclear Enterprises in Edinburgh, the business that bought the medical ultrasound unit from Kelvin & Hughes in 1966.

[1][4] Brown developed a contact scanner that could produce three-dimensional stereoscopic virtual image of body tissue.

[10] The new machine known as the Multiplanar Scanner was finally developed by 1976 and shown at an American Institute of Ultrasound in Medicine meeting in the same year and put into production in 1977.

[4] However, sales to UK and overseas hospitals were poor and the machine was finally withdrawn in 1979[4] and the Sonicaid project in Livingston closed.

[10] Brown's foresight in the design of the Multiplanar Scanner machine was admirable and it was a step in the right direction but at the time computing resources were meagre, being insufficient to achieve the desired results.

[10] After he retired in 1999, he worked part time as a quality manager at the radiological protection centre in St George's Hospital in Tooting, London.