. Author manuscript; available in PMC: 2012 Feb 1.

Published in final edited form as: Int J Radiat Oncol Biol Phys. 2010 Apr 18;79(2):481–489. doi: 10.1016/j.ijrobp.2009.11.012

Table 3.

Selected volumetric and axial slice measures.

Parameter	Structure	Reference Expert		Group_A (Atlas)			Group_B (Control)
Parameter	Structure	Scan 1	Scan 2	Scan 1	Scan 2	p-value^†	Scan 1	Scan 2	p- value^†
Mean volume (cm³)^*	GTV	68	78	78 [15.2]	78 [15.3]	1.0	68 [9.7]	68 [6.9]	0.9
	CTVA	784	820	800 [276]	809 [172]	0.7	590 [208]	642 [251]	0.4
	CTVB	67	91	77 [62]	100 [78]	0.06	71 [26]	51 [32]	0.3

Mean delineated length^* (number of axial CT slices )	GTV	12	12	19 [8.3]	19 [8.3]	-	16 [7.4]	16 [7.4]	-
	CTVA	45	43	44 [6.8]	41 [5.9]	-	40 [6.3]	39 [6.2]	-
	CTVB	19	21	13 [7.5]	15 [8.5]	-	20 [4.7]	16 [7.7]	-

No. axial CT slices covered by all observers	GTV	12	12	1	12	-	12	12	-
	CTVA	45	43	32	31	-	31	33	-
	CTVB	19	21	9	11	-	14	3	-

standard deviation [SD] in brackets;

^†

using paired Wilcoxon rank test to compare absolute volume of Scan 1 and Scan 2.