Table 2.
Comparison between the overall image performance and vessel detectability
| Institution | I | II | III | p value | |
|---|---|---|---|---|---|
| The overall image performance | 4.1 ± 1.15 | 4.31 ± 0.54 | 4.45 ± 0.53 | 0.340 | |
| Vessel detectability | ICA | 4.76 ± 0.54 | 4.81 ± 0.46 | 4.88 ± 0.43 | 0.144 |
| ACA | 2.93 ± 0.47 | 2.94 ± 0.31 | 2.99 ± 0.07 | 0.589 | |
| MCA | 2.93 ± 0.47 | 2.87 ± 0.39 | 2.96 ± 0.14 | 0.203 | |
| Total score | 14.71 ± 2.29 | 14.92 ± 1.19 | 15.27 ± 0.84 | 0.183 | |
The data were obtained using the multicenter eight-projection method. Data are presented as mean ± SD. Kruskal-Wallis test was conducted to obtain the p values that compare the data obtained using the multicenter eight-projection method. ICA, internal carotid artery; ACA, anterior cerebral artery; MCA, middle cerebral artery.