| |
Group A (n=82) |
Group B (n=82) |
P value |
| CT attenuation (HU) |
|
|
|
| AsAo root |
455.83 ± 85.59 |
326.55 ± 49.68 |
<.01 |
| CCA |
519.37 ± 92.95 |
372.25 ± 74.36 |
<.01 |
| ICA |
488.82 ± 102.18 |
418.87 ± 68.48 |
<.01 |
| M1 |
466.09 ± 85.77 |
384.29 ± 73.21 |
<.01 |
| V4 |
463.53 ± 92.28 |
376.57 ± 69.70 |
<.01 |
| Image noise |
|
|
|
| AsAo root |
24.19 ± 5.50 |
16.59 ± 2.68 |
<.01 |
| CCA |
15.71 ± 5.50 |
12.65 ± 3.29 |
<.01 |
| ICA |
18.74 ± 8.71 |
8.34 ± 3.41 |
<.01 |
| M1 |
26.80 ± 16.39 |
18.53 ± 7.99 |
<.01 |
| V4 |
22.34 ± 8.05 |
16.03 ± 9.54 |
<.01 |
| SNR |
|
|
|
| AsAo root |
20.20 ± 7.47 |
20.32 ± 4.81 |
0.91 |
| CCA |
37.98 ± 21.47 |
30.75 ± 10.92 |
0.01 |
| ICA |
29.75 ± 13.46 |
32.41 ± 10.79 |
0.19 |
| M1 |
25.28 ± 13.51 |
24.70 ± 13.49 |
0.79 |
| V4 |
25.11 ± 16.05 |
28.72 ± 13.63 |
0.13 |
| CNR |
|
|
|
| AsAo root |
24.45 ± 8.40 |
26.26 ± 5.95 |
0.13 |
| CCA |
45.04 ± 14.80 |
38.79 ± 13.31 |
0.05 |
| ICA |
35.76 ± 16.78 |
40.19 ± 12.86 |
0.06 |
| M1 |
27.92 ± 17.25 |
30.96 ± 16.55 |
0.26 |
| V4 |
28.89 ± 15.04 |
32.85 ± 14.18 |
0.09 |
Abbreviations: AsAo=Ascending aorta; LM=the left main artery; CCA=common
carotid arteries; ICA=internal carotid artery; M1=proximal middle cerebral artery;
V4=segments of the vertebral artery. |