The construction of the TESLA Accelerator Installation has been in progress under way at Vinca. It was designed so that the parameters of its main part-the VINCY Cyclotron enable, besides other applications, also the production of a number of radioisotopes which can be used in nuclear medicine. The production of a given radioisotope includes the choice of nuclear reaction (type, energy and beam current of accelerated particles, cross section, yield, etc), target (chemical form, isotopic composition, thermal stability), procedure of chemical treatment of the target after irradiation, procedure of labeling and quality control of the obtained radiopharmaceutical. In the paper these aspects are shown on the example of the production of radioisotope 123I.