TABLE 5

Diagnostic Accuracy of PET/CT and Multiphasic Contrast-Enhanced CT in Assessing Viability of Lipiodolized HCC

Modality	Positive criteria for viability	Interval after TACE	Sensitivity (%)	Specificity (%)	Positive predictive value (%)	Negative predictive value (%)	Accuracy (%)
PET	Grade II or III ¹⁸F-FDG uptake^*	Overall	97	63	91	83	89
		Acute^†	100	63	84	100	88
		Chronic^‡	93	NA^¶)	100	0	93
	Grade III ¹⁸F-FDG uptake only^*	Overall	63	63	86	31	63
		Acute^†	75	63	80	56	71
		Chronic^‡	50	NA	100	0	50
CT	Arterial enhancement	Overall	87	100	100	67	89
		Acute^†	94	100	100	89	96
		Chronic^‡	79	NA	100	0	79

↵* Grade II, ¹⁸F-FDG uptake similar to that in normal liver; grade III, higher ¹⁸F-FDG uptake than that in normal liver.
↵† Acute, <3 mo after TACE.
↵‡ Chronic, ≥3 mo after TACE.
NA = not applicable.