Table 1. Comparison of Preoperative Perfusion CT Values of Potential Surgical Side in the Region of Middle Cerebral Artery and Those of Contralateral Side [mean±SD; median (P25–P75)].
| Perfusion CT Values | Potential surgical side | Contralateral side | z/t | P |
| CBF (ml·100 g−1·min−1) | 33.45(24.75–48.85) | 50.47(34.8–96.82) | −4.58* | 0.0000 |
| CBV (ml·100 g−1) | 3.68±1.90 | 3.80±1.92 | −0.74** | 0.4648 |
| MTT(s) | 5.42(4.62–7.85) | 3.84(2.08–5.97) | 4.26* | 0.0000 |
| TTP(s) | 20.23±4.17 | 18.58±3.62 | 3.30** | 0.0021 |
CBF = cerebral blood flow, CBV = cerebral blood volume, MTT = mean transit time TTP = time to peak. P<0.05 was considered statistically significant. Normal distribution data were expressed as mean±SD while skew distribution of measurement data were expressed as median (P25–P75).* z value was derived by matched-pairs signed-ranks test, and ** t value was derived using paired t test.