Table 4. Comparison of CT and MRI Findings for Prediction of Visceral Pleural Surface Invasion, with Pathology as the Reference Standard.

Variables	Accuracy (%)	Sensitivity (%)	Specificity (%)	PPV (%)	NPV (%)	F-Score	Kappa
Length of contact
CT (cm)
> 3	61	83	48	48	83	61	0.2667
> 5	67	50	76	55	73	52	0.2667
MRI (cm)
> 3	67	100	48	52	100	69	0.3980
> 5	64	50	71	50	71	50	0.2143
Angle of mass margin
CT (°)
> 90	61	100	38	48	100	65	0.3092
> 180	67	17	95	67	67	27	0.1418
MRI (°)
> 90	61	100	38	48	100	65	0.3092
> 180	67	17	95	67	67	27	0.1418
Arch distance-to-maximum tumor diameter ratio
CT (> 0.9)	67	75	62	53	81	62	0.3388
MRI (> 0.9)	61	67	57	47	75	55	0.2186
Interface
MRI	91	83	95	91	91	87	0.8000

CT = computed tomography, MRI = magnetic resonance imaging, NPV = negative predictive value, PPV = positive predictive value