Dr. Efstratios Karagiannis was born in 1986, in Athens and grew up in Mytilene. He graduated from the 3rd High School of Mytilene and was then admitted to the Medical School of the Aristotle University of Thessaloniki, from where he graduated in 2012. For his Medical Specialty in of Radiation Oncology he practiced successively at: The Radiotherapy Clinic of Sana Klinikum Offenbach, under the supervision of Professor Dr. Zamboglou, the Radiotherapy Clinic of the Rechts der Isar Hospital of the Technological University of Munich, under the supervision of Professor Dr. Combs and at the Radiotherapy Clinic of the University of Magdeburg, under the supervision of Professor Dr. Gademann. Since December 2017 he has been working at the German Oncology Center as a Radiology-Oncologist, while simultaneously studying as a PhD candidate at the Goethe-Universität in Frankfurt on the subject of full automation of breast brachytherapy.