 At MIT he gathered dependable body content measurements from 27 dial painters.This information was used in 1941 by the National Bureau of Standards to establish the tolerance level for radium of 0.1 μCi (3.7 kBq).At the International Congress of Oncology in Paris in 1922, Henri Coutard, a French radiologist working with the Institut Curie, presented evidence that laryngeal cancer could be treated without disastrous side-effects.