The 17th Congress of the Polish Society of Nuclear Medicine was held in Białystok on 26-28.05.2022. The opening lecture titled „Current and future development of nuclear medicine at the Medical University of Białystok” was delivered by the Rector, Prof. A. Krętowski. The congress was attended by 450 participants from Poland and abroad, professional scientists, specialists, clinicians and representatives of all professional groups associated with nuclear medicine centres. The Congress of the Polish Society of Nuclear Medicine is the largest Polish event addressed directly to this community. The leading theme of the Congress was nuclear theranostic, that is personalised isotope therapy. In addition to innovative application of nuclear medicine in oncology, endocrinology, cardiology, neurology or endocrinology, the agenda also included important sessions on the role of artificial intelligence in radioisotope diagnostics and therapy, modern radiopharmaceuticals and preclinical nuclear imaging methods as a major tool for developing molecular therapies.