Delineation in thoracic oncology: a prospective study of the effect of training on contour variability and dosimetric consequences

Table 1 Comparison indices for the GTV

			Comparison with the expert	Comparison before and after the course
				Range		Mean Difference	P*
				Min	Max
GTV (cm ³ )	Before	103.39	p = 0.02	59.9	215.2	3.90	0.53
	After	99.48	p = 0.09	39.71	202.29
Volume Ratio	Before	1.16	p = 0.02	0.67	2.41	0.04	0.53
	After	1.11	p = 0.09	0.44	2.27
Common Delineated Volume	Before	78.41	p < 0.001	58.85	91.78	2.06	0.27
	After	76.35	p < 0.001	40.24	92.06
Additional Delineated Volume	Before	28.77	p < 0.001	7.05	61.99	0.94	0.70
	After	27.82	p < 0.001	9.14	59.56
Overlap	Before	0.58	p < 0.001	0.36	0.71	0.006	0.70
	After	0.57	p < 0.001	0.38	0.71
Kappa	Before	0.73	p < 0.001	0.54	0.83	0.006	0.66
	After	0.72	p < 0.001	0.56	0.83

ISSN: 1748-717X