TABLE 3

κ-Indices for Interobserver Agreement Among 3 Readers

	Rigid PET/CT		Nonrigid PET/CT
Landmark	κ-Index	P	κ-Index	P
Lung apices	0.55	<0.001	0.66	<0.001
Aortic arch	0.64	<0.001	0.83	<0.001
Heart	0.59	<0.001	0.46	<0.001
Spine	0.62	<0.001	0.40	<0.001
Carina tracheae	0.67	<0.001	0.79	<0.001
Sternum	0.62	<0.001	0.59	<0.001
Diaphragm	0.61	<0.001	0.61	<0.001
Tumor	0.50	0.001	0.55	<0.001