Focusing on Iran's nuclear medicine capabilities and its role in strengthening regional convergence, the present study analyzes the technical, therapeutic, and policy dimensions of cooperation between Iran and the Persian Gulf countries. Relying on the framework of Mittrani's functionalist theory, the present study seeks to examine how cooperation in the field of nuclear medicine, especially in the production and use of radiopharmaceuticals, can deepen regional relations and promote convergence between Iran and neighboring countries. The research method used is qualitative content analysis, which was conducted through a review of scientific documents, international reports, and interviews with Iranian experts in the field of nuclear medicine. The findings indicate that Iran, by taking advantage of its technological advantages in the production of radiopharmaceuticals and providing cost-effective medical services, can act as a hub for scientific and technical cooperation in the region. Such cooperation not only leads to the improvement of health indicators in the Persian Gulf countries, but also paves the way for knowledge networking, information exchange, and the development of medical tourism. Accordingly, strengthening scientific cooperation in the field of nuclear medicine can be considered as an efficient tool for expanding political and economic interactions in the region.