Table 1.

Area under the curve ratio between probe-derived, image-derived and manually sampled input functions

	Subject
	1	2	3	4	5	6	7	8
	AUC	AUC	AUC	AUC	AUC	AUC	AUC	AUC	Mean	SD	COV
Unfitted IF
Probe IF	21,173	27,576	19,765	19,024	23,710	17,389	33,630	19,448
Manual IF	20,246	26,385	18,418	17,265	22,878	15,270	30,684	19,538
Image-derived IF	13,283	27,099	9,486	19,543	14,565	14,563	16,506	12,149
Probe/manual	1.046	1.045	1.073	1.102	1.036	1.139	1.096	0.995	1.067	0.045	0.042
Pet/manual	0.656	1.027	0.515	1.132	0.637	0.954	0.538	0.622	0.760	0.240	0.315
Probe/PET	1.594	1.018	2.084	0.973	1.628	1.194	2.037	1.601	1.516	0.425	0.281
Fitted IF
Probe IF	21,720	27,762	19,866	18,595	23,573	17,347	33,434	19,344
Manual IF	20,981	26,414	18,500	17,602	23,402	15,226	30,297	19,693
Image-derived IF	13,533	26,243	9,094.8	19,158	14,793	11,393	16,937	12,574
Probe/manual	1.035	1.051	1.074	1.056	1.007	1.139	1.104	0.982	1.056	0.050	0.048
Pet/manual	0.645	0.994	0.492	1.088	0.632	0.748	0.559	0.639	0.725	0.210	0.290
Probe/PET	1.605	1.058	2.184	0.971	1.594	1.523	1.974	1.538	1.556	0.408	0.262

AUC, area under curve; COV, coefficient of variation; IF, input function; SD, standard deviation.