Fig. 4From: Considerable interobserver variation in delineation of pancreatic cancer on 3DCT and 4DCT: a multi-institutional studyFor the four patients, the local observer variation in color expressed in local SD (centimeters) of the delineations of GTV in posterior (a) and caudal view (c) and the iGTV in posterior (b) and caudal view (d) projected onto the median surface. Red indicates a local SD ≥ 0.94 cmBack to article page