Many national and international clinical trials involving radiotherapy are conducted worldwide. There is a growing demand for collaboration between different groups conducting these trials to ensure adequate statistical power, which will work to broaden the acceptance of trial results therefore allowing these trials to have a meaningful impact in the clinical setting.

This group consists of clinical trial quality assurance offices in existence around the world. Our main objective is to harmonise and improve the quality assurance of radiation therapy implemented worldwide as it pertains to multi-institutional cooperative clinical trials for the treatment of cancer.