Dr. Dirk Verellen is a Professor at Antwerp University and director of the Medical Physics Department of the ZAS Hospitals (Ziekenhuis aan de Stroom) and Iridium Cancer Network Antwerp, Belgium. He received an M.Sc. degree in solid state physics at the Antwerp University, Belgium, and a Ph.D. in medical sciences from the Vrije Universiteit Brussel. He is also a guest professor at the University of Leuven, several continual education programs, and course director for Clinical Practice & Implementation of Image-Guided Stereotactic Body Radiotherapy at the ESTRO School of Radiotherapy and Oncology. His main interest is in the practical issues concerning implementation of conformal radiotherapy and image-guidance in a clinical environment, and safety and quality management in radiotherapy. He has been serving in the board of editors for the journals “Physics & Imaging in Radiation Oncology”, “Medical Physics”, and so on. He was awarded as Spinoza Honorary Professor of the University of Amsterdam in 2009, received the prestigious ESTRO Breur Award Lecture in 2015, and the Emanuel van der Schueren award lecture of the BVRO in 2017. He served as treasurer, member of the Board of Directors, the Physics Committee and the Radiation Oncology Safety Committee of ESTRO (European Society for Radiotherapy and Oncology) from 2013 to 2024, and was membership officer 2011–2013. He is currently also board member for Kom Op Tegen Kanker (Stand up to Cancer) and serves in different committees.