Table 3.

Summary of agreement of inter-operator variance using Cohen’s weighted kappa (k) statistics.

Operator		10% PET Image				20% PET Image				50% PET Image
		d			k	d			k	d			k
		Mean	(95% CI)			Mean	(95% CI)			Mean	(95% CI)
1 vs. 2	Lung	−0.28	−0.42	−0.14	0.96	−0.47	−0.64	−0.30	0.94 −0.40		−0.57	−0.23	0.94
	Liver	−0.18	−0.31	−0.05	0.97	−0.06	−0.22	0.11	0.95	0.05	−0.11	0.20	0.96
	Bowel	−0.30	−0.43	−0.17	0.97	−0.85	−0.99	−0.71	0.92 −0.79		−0.97	−0.61	0.91
1 vs. 3	Lung	0.18	0.04	0.31	0.97	−0.07	−0.26	0.11	0.94 −0.32		−0.50	−0.15	0.94
	Liver	0.20	0.08	0.32	0.97	0.53	0.36	0.69	0.94	0.40	0.22	0.57	0.94
	Bowel	−0.04	−0.14	0.06	0.98	−0.29	−0.47	−0.10	0.94 −0.68		−0.91	−0.44	0.88
2 vs. 3	Lung	0.45	0.32	0.59	0.96	0.40	0.23	0.57	0.94	0.07	−0.10	0.25	0.95
	Liver	0.38	0.26	0.50	0.96	0.58	0.41	0.76	0.93	0.35	0.19	0.51	0.95
	Bowel	0.26	0.14	0.38	0.97	0.56	0.38	0.75	0.92	0.11	−0.10	0.32	0.92
Operator		SR-PET Image (Proposed Method)				100% PET Image
		d			k	d			k
		Mean	(95% CI)			Mean	(95% CI)
1 vs. 2	Lung	−1.06	−1.22	−0.91	0.86	−0.40	−0.56	−0.24	0.92
	Liver	−0.74	−0.89	−0.59	0.93	−0.12	−0.26	0.01	0.97
	Bowel	−1.09	−1.27	−0.92	0.87	−0.73	−0.89	−0.57	0.92
1 vs. 3	Lung	−0.12	−0.32	0.08	0.93	−0.18	−0.39	0.04	0.92
	Liver	0.36	0.17	0.56	0.93	0.11	−0.06	0.28	0.95
	Bowel	−0.66	−0.89	−0.42	0.88	−0.58	−0.79	−0.38	0.91
2 vs. 3	Lung	0.94	0.76	1.13	0.89	0.22	0.03	0.41	0.94
	Liver	1.10	0.95	1.26	0.88	0.23	0.07	0.40	0.95
	Bowel	0.44	0.25	0.62	0.93	0.15	−0.06	0.35	0.93

d: Difference of MOS between operators, PET: Positron emission tomography, SR-PET: Super-resolved PET, MOS: Mean opinion score.