Proposal for the delineation of neoadjuvant target volumes in oesophageal cancer

Abstract Purpose To define instructions for delineation of target volumes in the neoadjuvant setting oesophageal cancer. Materials and methods Radiation oncologists five European centres participated following consensus process: [1] revision published (MEDLINE) national/institutional guidelines; [2] first round cases (patient 1–5) according to [3] meeting discuss results step 1 2, followed by a volume proposal; [4] circulation proposed atlas feedback; [5] second new 6–10) peer review validate (two additional centres) agreed guidelines atlas; [6] final on depicted an atlas. Target rounds were compared between Dice similarity coefficient (DSC) maximum/mean undirected Hausdorff distances (Hmax/Hmean). Results In round, consistency was moderate (CTVtotal: DSC = 0.59–0.88; Hmean = 0.2–0.4 cm). Delineations much more consistent. Lowest variability obtained participating DSC: p  A proposal generated. Conclusion We radiation treatment These will enable uniform patients clinical practice trials.