Table 4.

Comparisons for six MVCT scans between auto-contours of the spinal cord and contours drawn by each of six oncologists. Results are given for the median and mean of the conformity index, and of the distance between centres (mm). Quoted uncertainties are statistical.

Observer	1	2	3
Median CI	$0.78\pm 0.01$	$0.79\pm 0.01$	$0.77\pm 0.01$
Mean CI	$0.77\pm 0.01$	$0.78\pm 0.01$	$0.75\pm 0.01$
Median DBC	$0.70\pm 0.05$	$0.67\pm 0.04$	$0.74\pm 0.06$
Mean DBC	$0.77\pm 0.04$	$0.77\pm 0.04$	$0.88\pm 0.05$

Observer	4	5	6
Median CI	$0.76\pm 0.01$	$0.74\pm 0.01$	$0.64\pm 0.01$
Mean CI	$0.75\pm 0.01$	$0.73\pm 0.01$	$0.62\pm 0.01$
Median DBC	$0.92\pm 0.06$	$1.03\pm 0.07$	$1.37\pm 0.09$
Mean DBC	$1.02\pm 0.05$	$1.11\pm 0.05$	$1.54\pm 0.07$