Table 3.

Comparison of CV and Other Parameters (Visual Assessment, SUVmax, Longest Diameter, HUmax) Using the Known Cutoff in Determining Metastatic LNs

		Pathologic finding
		Metastasis	Benign	Total
18F-FDG PET—visual analysis	Definitely positive	42 (80.8 %)	14 (33.3 %)	56 (59.6 %)
	Faintly positive	8 (15.4 %)	24 (57.1 %)	32 (34.0 %)
	Negative	2 (3.8 %)	4 (9.5 %)	6 (6.4 %)
	Total	52	42	94
18F-FDG PET parameter—SUVmaxa	≥2.5	51 TP	40 FP	91
	<2.5	1 FN	2 TN	3
	Total	52	42	94
CT parameter—longest diametera	>10 mm	51 TP	34 FP	85
	≤10 mm	1 FN	8 TN	9
	Total	52	42	94
CT parameter—HUa	≤120	28 TP	13 FP	41
	>120	24 FN	29 TN	53
	Total	52	42	94
18F-FDG PET parameter—CVa	>0.2	46 TP	10 FP	56
	≤2.0	6 FN	32 TN	38
	Total	52	42	94

TP true positive, FP false positive, TN true negative, FN false negative

^aSUVmax of ≥2.5, diameter of >1.0 cm, HUmax ≤120, CV >0.20 were used as cutoff value