History of Nuclear MedicineIntroductionThe history of nuclear medicine has a lot of importance and has brought significant improvement to today's medicine. Nuclear medicine has made gene therapy a success and improved cancer survival rates much more than before. There is no real birth date for nuclear medicine according to medical historians and this is due to the multidisciplinary nature of nuclear medicine. However, there is a rough range for his birth date, which is between 1934 and 1946. In 1934, artificial radioactivity was discovered and in 1946, radionuclides were produced by the Oak Ridge National Laboratory for medical. Through this article, the following points would be discussed: the achievements and major discoveries that contributed to the evolution of nuclear medicine, the important uses of nuclear medicine, and the growth and expansion of nuclear medicine in outside North America. Achievements The following dates are important achievements that have helped nuclear medicine improve and overcome milestones that once seemed impossible. to be achieved.• In 1669, phosphorus was discovered by H. Brand. 4• In 1896, mysterious uranium rays were discovered by H. Becquerel. 2• In 1934, artificially produced radioisotopes were discovered by Frédéric Joliot-Curie and Irène Joliot-Curie, which has been considered the most important step nuclear medicine has taken for historians. 1• In 1937, technetium 99m was discovered by C. Perrier and E. Segre. It is a radionuclide first discovered as an artificial element used to fill space number 43 on the periodic table. 1 • In 1939, strontium-89 was evaluated for use in the treatment of cancer-related pain. 3• In 1938, the isotopes of iodine 131 and cobalt 60 were discovered by J. Livingood and G. Seaborg. 2• In 1946, radionuclides were produced by the Oak Ridge National Laboratory.• In 1971, nuclear medicine was