Table 2.

Area under the receiver operating characteristic curve for 10 observers

Tube voltage (kV)	Tube current (mA)	RD (mSv)	IR	FBP
120	10	0.171	0.743 ± 0.023	0.725 ± 0.026
120	20	0.229	0.747 ± 0.027	0.734 ± 0.026
120	80	0.614	0.788 ± 0.025a	0.739 ± 0.024
120	160	1.142	0.798 ± 0.024b	0.720 ± 0.027
100	80	0.368	0.776 ± 0.025c	0.751 ± 0.026
80	320	0.570	0.796 ± 0.025b	0.761 ± 0.027

FBP, filtered back projection; IR, iterative reconstruction; RD, estimated radiation dose.

^aSignificantly higher than the images acquired using IR at 120 kV/10 mA and using FBP at 120 kV/10, 20, 80 and 160 mA.

^bSignificantly higher than the images acquired using IR at 120 kV/10 mA and 20 mA and using FBP at 120 kV/10, 20, 80, and 160 mA, and 100 kV/80 mA.

^cSignificantly higher than the images acquired using FBP at 120 kV/10 and 160 mA.