ESRO has close connections and collaborates with other international societies in the organisation of joint educational activities and development of educational strategies:

Accreditation Council of Oncology in Europe (ACOE)
European Association for Cardio-Thoracic Surgery (EACTS)
European Association of Nuclear Medicine (EANM)
European Association of Urology (EAU)
European Society of Medical Oncology (ESMO)
European School of Oncology (ESO)
European Society of Surgical Oncology (ESSO)
European Society of Thoracic Surgeon (ESTS)
International Atomic Energy Agency (IAEA)
International Commission on Radiation Units and Measurements (ICRU)
European Union of Medical Specialists (UEMS)

Over a period of 20 years and with support from more than 40 EU projects (ERASMUS, SOCRATES, TEMPUS, Europe Against Cancer, Copernicus, COST, Quality of Life), ESTRO has created an impressive international network with regional and national societies, professional bodies and industrial partners in the field of radiation oncology. ESTRO is the keystone of radiation oncology in Europe and ESRO intends to foster and intensify this network and collaboration in the future and open it up to further collaborations.