BeSTRO (Belgian Society for Radiotherapy and Oncology) is the scientific organization of radiation oncology in Belgium. The purpose of the association is to promote the practice and development of radiotherapy and oncology in the broadest sense, as well as to establish a fruitful dialogue with other clinical disciplines that can contribute in an important way to the successful treatment of patients.  To this end, BeSTRO organizes training courses and continuing education, but the organization also participates in the development of national guidelines on oncological treatment and promotes scientific studies within radiation oncology.