Methods for determining systemic biodistribution characteristics of intravitrially administered medicaments. In some embodiments, radiolabeled agents or medicaments, such as I-124 labeled bevacizumab, ranibizumab and aflibercept, was imaged utilizing PET/CT in a non-human primate model, with radioactivity emission measurements made to determine the intravitreal half-lives of each agent and to determine the differences of radioactivity uptake in non-ocular organs.
