Table 2 Quantitative analysis of image sets (conventional images and VME images 40–120 KeV) according to SNR

Conventional

2.83 ± 3.21

40 KeV

11.28 ± 9.40

< 0.001^*

50 KeV

7.76 ± 6.68

< 0.001^*

< 0.001^*

60 KeV

5.55 ± 4.93

< 0.001^*

< 0.001^*

70 KeV

4.15 ± 3.99

< 0.001^*

< 0.001^*

80 KeV

3.28 ± 3.42

< 0.001^*

< 0.001^*

90 KeV

2.71 ± 3.17

0.284

< 0.001^*

100 KeV

2.32 ± 3.0

< 0.001^*

< 0.001^*

110 KeV

2.04 ± 2.89

< 0.001^*

< 0.001^*

120 KeV

1.89 ± 2.91

< 0.001^*

< 0.001^*

^Frp

< 0.001^*