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. Author manuscript; available in PMC: 2018 Sep 1.
Published in final edited form as: Int J Radiat Oncol Biol Phys. 2017 May 6;99(1):80–89. doi: 10.1016/j.ijrobp.2017.05.002

Figure 4.

Figure 4

Individual observers’ contour volumes (mean±SD) normalized relative to the corresponding mean volume per patient and averaged over all patients for the gross tumor volumes (GTV) of primary tumor (PT) (A) and lymph node (LN) (B) per imaging modality. Some observers consistently delineated comparatively large or small volumes. Volumes delineated by radiologists (Observer#3 and Observer#5) were relatively small compared to radiation oncologists.