British Association for the Advancement of Radiology and Physiotherapy (BARP) , [1917]-1924 British Institute of Radiology , 1924-1927 British Institute of Radiology incorporated with the Röntgen Society , 1927-

In 1917 when the Cambridge University diploma in Medical Radiology and Electrology was proposed there was no medical body to inaugurate and sponsor the teaching in London, so a medical society - the British Association for the Advancement of Radiology and Physiotherapy (BARP) - was formed. It was composed chiefly of medical members of the Röntgen Society and members of the Electro-therapeutic Section of the Royal Society of Medicine.
In 1921, BARP was incorporated, and in 1922, acquired premises at 32 Welbeck St. In 1924 it changed its name to the British Institute of Radiology (BIR). It worked in collaboration with the Röntgen Society whose meetings were held at the same premises, until 1927 when the two societies amalgamated to form The British Institute of Radiology incorporated with the Röntgen Society. The Society of Radiographers (founded in 1920) also became affiliated with the Institute at this time. The BIR received its Royal Charter of Incorporation in 1958.