GTV delineation in supraglottic laryngeal carcinoma: interobserver agreement of CT versus CT-MR delineation

Radiation Oncology

Table 1 Gross tumor volumes delineated by 3 observers on CT and CT-MR in supraglottic laryngeal carcinoma

Patient (no.)	Tumor stage	Mean GTV (cm ³ )		CIgen		COV
		CT	CT-MR	CT	CT-MR	CT	CT-MR
8	T1	1.2	1.3	0.52	0.54	0.23	0.11
6	T2	1.5	1.9	0.29	0.32	0.41	0.66
12	T3	1.6	1.5	0.62	0.67	0.18	0.03
16	T3	1.9	2.8	0.43	0.17	0.38	0.13
20	T2	2.3	2.8	0.61	0.41	0.14	0.38
14	T2	2.9	3.2	0.73	0.68	0.07	0.05
9	T2	5.0	5.1	0.65	0.61	0.17	0.25
4	T2	5.3	5.2	0.62	0.50	0.19	0.41
1	T3	5.5	6.7	0.76	0.66	0.04	0.06
19	T2	5.5	6.6	0.63	0.54	0.04	0.06
5	T2	5.7	6.7	0.49	0.49	0.32	0.30
11	T2	6.8	6.5	0.68	0.69	0.18	0.14
13	T2	7.0	6.8	0.77	0.80	0.10	0.03
7	T2	7.1	7.3	0.75	0.73	0.04	0.12
2	T3	7.9	9.6	0.70	0.59	0.09	0.27
18	T3	7.9	8.1	0.59	0.57	0.10	0.08
17	T3	11.1	11.8	0.67	0.62	0.05	0.15
10	T4	12.8	22.1	0.49	0.50	0.36	0.35
15	T4	14.7	20.6	0.69	0.68	0.09	0.16
3	T3	27.0	29.1	0.60	0.66	0.26	0.11

Tumor stage, mean delineated tumor volumes (GTV) in cm³ of 3 observers ranked by mean GTV. COV (coefficient of variation) and CIgen (conformity index general) for GTV on CT and CT-MR.

ISSN: 1748-717X