[Radio-anatomy atlas for delineation SIRIADE website: features and 1 year results].

3-D conformal radiotherapy is based on accurate target volumes delineation. Radio-anatomy knowledge's are useful but sometimes difficult to obtain. Moreover, the sources of recommendations for volume definition are disparate. We thus developed a free radio-anatomy website dedicated to volumes delineation for radiation-oncologists (www.siriade.org). This website is a search engine allowing to access to delineation characteristics of main tumours illustrated with clinical cases. It does not aim to provide guidelines. Its main purpose is to provide an iconographic training support with frequent updatings. We present the features of this website and one year connexion statistics.