TABLE 5

Areas Under Fitted AFROC Curves for Targets Located in Lungs

Algorithm	Parameter	Obs. 1	Obs. 2	Obs. 3	Obs. 4	Obs. 5
FBP	A_L	0.64	0.78	0.68	0.49
OSEM	A_L	0.55	0.58	0.53		0.70
AWOSEM	A_L	0.73	0.76		0.72	0.84
FBP vs. OSEM	P	0.042	0.001	0.011
AWOSEM vs. FBP	P	0.033	0.749		<0.001
AWOSEM vs. OSEM	P	<0.001	0.025			0.035

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