Table 1.

Dice similarity coefficient (DSC), mean distance to agreement (MDA) and Hausdorff distance (HD) for radiographer and clinician contours compared to the ‘gold standard’ STAPLE contour. Results presented as median (range).

	DSC		MDA (mm)		HD (mm)
	Clinicians	Radiographers	Clinicians	Radiographers	Clinicians	Radiographers
High dose CTV	0.93 (0.88–0.97)	0.91 (0.86–0.96)	0.8 (0.4–1.9)	0.9 (0.5–1.6)	5.3 (3.2–9.9)	4.8 (2.9–9.5)
Low dose CTV	0.92 (0.86–0.97)	0.91 (0.83–0.96)	0.9 (0.8–1.0)	0.9 (0.4–1.5)	5.3 (3.2–10.0)	5.1 (3.3–12.2)