Dr. Ioan Flavius Coșer is a highly accomplished Senior Radiation Oncologist based in Romania, currently practicing at the prestigious Amethyst Radiotherapy Center in Alba Iulia and Medisprof Cancer Center in Cluj-Napoca. Graduating from the "Iuliu Hațieganu" University of Medicine and Pharmacy in 2014, he completed his residency at the renowned "Prof. Dr. Ion Chiricuță" Oncology Institute. Dr. Coșer specializes in cutting-edge external radiotherapy techniques, including Stereotactic Body Radiotherapy (SBRT) and Stereotactic Radiosurgery (SRS), as well as IMRT, VMAT, and brachytherapy. Committed to global medical advancement, he has honed his expertise through international clinical observerships in Munich, Dublin, and Milan. As an active speaker at international forums—such as the Annual Irish Stereotactic Meeting—and a member of ESTRO and ESMO, Dr. Coșer brings deep clinical expertise and a passion for precision medicine to the stage, focusing on gastrointestinal, lung, urogenital, and head and neck cancers.