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. 2017 Nov 16;91(1081):20170521. doi: 10.1259/bjr.20170521

Table 2.

Comparison of image noise and SNR in different percentages of ASIR-V and 40% ASIR

	Noise (SD)			SNR
	Fat	Muscle	Aorta	Fat	Muscle	Aorta
ASIR-V
10%	17.71 ± 2.84^a	23.45 ± 3.09^a	19.06 ± 2.32	6.13 ± 1.06	2.03 ± 0.42	1.70 ± 0.40
20%	16.35 ± 2.26^a	21.61 ± 3.62^a	17.50 ± 2.54^a	6.69 ± 1.13^a	2.13 ± 0.42	1.85 ± 0.47
30%	15.35 ± 1.72^a	19.92 ± 3.01^a	15.35 ± 2.48^a	7.03 ± 0.93^a	2.26 ± 0.49	2.06 ± 0.63
40%	14.26 ± 2.17^a	18.51 ± 2.80^a	14.36 ± 2.10^a	7.63 ± 1.47^a	2.50 ± 0.67^a	2.27 ± 0.68^a
50%	13.49 ± 2.06^a	16.74 ± 3.01^a	13.58 ± 2.22^a	8.08 ± 1.43^a	2.78 ± 0.76^a	2.37 ± 0.65^a
60%	12.09 ± 1.75^a	15.04 ± 2.73^a	12.14 ± 2.40^a	9.15 ± 1.70^a	3.03 ± 0.77^a	2.67 ± 0.87^a
70%	11.14 ± 1.31^a	13.12 ± 2.30^a	10.90 ± 1.73^a	9.71 ± 1.28^a	3.59 ± 0.97^a	2.84 ± 0.84^a
80%	10.42 ± 1.47^a	12.62 ± 2.35^a	9.67 ± 1.82^a	10.48 ± 1.86^a	3.77 ± 0.88^a	3.52 ± 0.97^a
90%	9.21 ± 1.62^a	10.92 ± 2.42^a	8.38 ± 1.10^a	11.92 ± 2.30^a	4.37 ± 1.42^a	3.84 ± 1.13^a
100%	8.36 ± 1.48^a	10.07 ± 3.55^a	7.33 ± 1.35^a	13.19 ± 2.99^a	4.82 ± 1.51^a	4.40 ± 1.56^a
40% ASIR	19.02 ± 3.50	25.45 ± 4.77	20.01 ± 1.50	5.81 ± 1.30	1.94 ± 0.56	1.72 ± 0.46
p value^b	<0.05	<0.05	<0.05	<0.05	<0.05	<0.05

ASIR, adaptive statistical iterative reconstruction; ASIR-V, adaptive statistical iterative reconstruction V; SNR, signal-to-noise ratio.

^ap < 0.05 for paired comparison, ASIR-V series vs 40% ASIR.

^bp values for the one-way ANOVA test for all groups.