International Congress of Radiology

Various societies sprung up in different countries where ideas were exchanged between like-minded people and national standards for the measurement of X-Ray intensity developed.

By the end of the First World War a number of proposals on how to measure the intensity of X-Rays had been made, but there was little agreement between the various parties concerned.

[1] In 1925 the British Institute of Radiology, under the leadership of Charles Thurstan Holland[2][3] invited delegates from a number of countries to attend the First International Congress on Radiation in London.

[4] The second congress was held in Stockholm under the chairmanship of Manne Siegbahn where the three commissions proposed in London met for the first time.

[5] The incumbent chairman of the ICR, Arthur C. Christie, who had been nominated thirteen years before was unable to attend the London conference, so Orndoff, the secretary-general of that congress deputised handing the presidency to Ralston Paterson.

The advent of air travel removed this restriction and subsequent congresses have since been held in many parts of the world.