Roentgen (unit) Roentgen (unit) The roentgen or röntgen () (symbol R) is a legacy unit of measurement for the exposure of X-rays and gamma rays. It is defined as the electric charge freed by such radiation in a specified volume of air divided by the mass of that air. In 1928 it was the first international measurement quantity for ionising radiation to be defined for radiation protection, and was an easily replicated method of measuring air ionization directly by using an ion chamber. It is named after the German physicist Wilhelm Röntgen, who discovered X-rays. Although relatively easy to measure, it had
Gordon Wallace (professor) been focused on exploring the development and use of such materials in biomolecular technologies – he has led a number of initiatives in developing the field of organic bionics. He has developed collaborative research relationships with the inventor of the Cochlear Bionic Ear, Professor Graeme Clark as well as Professor Stephen O'Leary, Professor Peter Choong, and Professor Mark Cook which have led to significant developments in the field of new materials for medical bionics. He has now established a significant national clinic network with others including Professor Chris Baker, Professor Michael Coote, Professor Toby Coates, Professor Gerard Sutton, Professor Stuart