Prof. Dr. med. Wolfgang Sauerwein studied medicine in Limoges (France) and Essen (Germany). He is a board–certified radiologist and radiation oncologist. He is retired professor at the University Duisburg-Essen, visiting professor at Okayama University and president of the German Society for BNCT. One of his main research activities is the use of particles in cancer therapy: protons, neutrons, carbon ions, and BNCT. Other foci of his scientific interests are the treatment of eye tumors, radiation protection in radiation therapy, and the Monte Carlo simulation of medical linacs with the resulting dose distributions in patients. A core area of his clinical work was international collaboration to treat patients with particles at large and expensive facilities around the world. Recently he was awarded the “The Order of the Rising Sun, Gold Rays with Neck Ribbon” (旭日中綬章) of the Japanese Imperial House.