TABLE 3

Lesion Uptake of ¹⁸F-FDG and ¹¹C-Acetate on PET/CT: Patient-Based Analysis of 90 Patients with Primary HCC

		¹⁸F-FDG		¹¹C-acetate
Characteristic	No. of patients (n = 90)	Patients with all lesions positive (n)	P	Patients with all lesions positive (n)	P	P^* between 2 PET/CT types
Tumor size (cm)
≥1, <2	7	0 (0)	<0.001	2 (29)	0.030	NS
≥2, <5	42	18 (43)		29 (69)		0.003
≥5	41	32 (78)		32 (78)		NS
			<0.001^†		0.023^†
Tumor number
1	46	26 (57)	0.001	36 (78)	0.001	0.006
2–3	14	2 (14)		4 (29)		NS
≥4	30	22 (73)		23 (77)		NS
			NS^†		NS^†
Tumor type
Well defined	78	42 (54)	NS	55 (71)	NS	0.002
Ill defined	12	8 (67)		8 (67)		NS
Portal vein invasion
No	63	29 (46)	0.005	43 (68)	NS	0.001
Yes	27	21 (78)		20 (70)		NS

↵* Comparison of positives between ¹⁸F-FDG and ¹¹C-acetate PET/CT according to tumor characteristics using McNemar χ² test.
↵† Score test for trend.
NS = not significant.
Data in parentheses are percentages.