Table 3: Estimates of quantitative
image quality parameters.
Mean value |
220 mAs |
350 mAs |
p-value |
SNRa WMb |
7.8 |
11 |
0.04* |
SNR GMc |
10.8 |
15.3 |
0.02* |
CNRd |
1.7 |
2.5 |
0.008* |
|
|||
Mean value |
240 mAs |
350 mAs |
p-value |
SNR WM |
9.27 |
9.8 |
0.2 |
SNR GM |
12.2 |
13.4 |
0.3 |
CNR |
2.1 |
2.3 |
0.4 |
aSNR = signal-to-noise ratio
bWM = white matter
cGM = gray matter
dCNR = contrast-to-noise ratio
*significant with p < 0.05