Table 3.

Comparison of quantitative measurements among ASIR-V and DLIR under different radiation doses

Variables	SDCT	LDCT	DLIR-M	DLIR-H		p
					P	SDCT vs DLIR-H	SDCT vs DLIR-M	SDCT vs LDCT	DLIR-H vs DLIR-M	DLIR-H vs LDCT	DLIR-M vs LDCT
Image noise	12.4 ± 2.1	28.6 ± 3.9	20.4 ± 2.6	12.5 ± 7.2	<0.001	1.000	<0.001	<0.001	<0.001	<0.001	0.006
CNR aorta	0.9 ± 0.6	0.4 ± 0.3	0.6 ± 0.5	0.9 ± 0.7	<0.001	1.000	0.163	0.004	0.181	0.007	0.625
Image signal	46.9 ± 6.6	49.0 ± 9.5	50.2 ± 8.9	50.4 ± 8.0	0.2	0.098	0.124	0.325	0.905	0.497	0.576

ASIR, adaptive statistical iterative reconstruction; DLIR, deep learning image reconstruction; DLIR-H: DLIR-H with low-dose; DLIR-M: DLIR-M with low-dose; LDCT: ASIR-V40% with low-dose;LDCT, low-dose CT; SDCT, standard-dose CT; SDCT: ASIR-V40% with standard-dose.