TABLE 6

Areas Under Fitted AFROC Curves for Targets Located in Liver

Algorithm	Parameter	Obs. 1	Obs. 2	Obs. 3	Obs. 4	Obs. 5
FBP	A_L	0.52	0.53	0.59	0.37
OSEM	A_L	0.28	0.28	0.25		0.28
AWOSEM	A_L	0.51	0.48		0.42	0.56
FBP vs. OSEM	P	<0.001	<0.001	<0.001
AWOSEM vs. FBP	P	0.899	0.241		0.323
AWOSEM vs. OSEM	P	<0.001	<0.001			<0.001

Obs. = observer; A_L = area below AFROC curve; P = probability value of z-score test.