From: The contribution of medical physics to nuclear medicine: a physician's perspective
1895 | X-rays | Wilhelm C. Roentgen | German physicist | 1845 to 1923 |
1896 | Radioactivity | Antoine H. Becquerel | French physicist | 1852 to 1908 |
1898 | Polonium, radium,thorium | Marie Sklodowska Curie | French physicist | 1867 to 1934 |
1923 | Tracer principle | Georg V. Hevesy | Hungarian chemist | 1885 to 1966 |
1927 | Circulation times | Hermann L. Blumgart | German doctor | 1895 to 1977 |
1928 | Counter | Johannes W. Geiger | German physicist | 1882 to 1945 |
 |  | Walther Mueller | German physicist | 1905 to 1979 |
1932 | Cyclotron | Ernest O. Lawrence | American physicist | 1901 to 1958 |