Table 3. The figures of morphological and perfusion data in different stages in MMD.
| Parameters (average) | Stages of MMD | |||||
|---|---|---|---|---|---|---|
| Stage I (N=0) | Stage II (N=4) | Stage III (N=9) | Stage IV (N=5) | Stage V (N=3) | Stage VI (N=6) | |
| Outer diameter (mm) | – | 2.734 | 2.844 | 3.573 | 2.908 | 3.006 |
| Inner diameter (mm) | – | 0.618 | 0.636 | 0.964 | 0.871 | 0.738 |
| Wall thickness (mm) | – | 1.243 | 1.427 | 1.933 | 1.383 | 1.45 |
| Maximum wall thickness (mm) | – | 1.108 | 1.177 | 1.601 | 1.221 | 1.23 |
| Mean-CBF (mL/100 g/min) | – | 39.837 | 34.15 | 36.676 | 26.595 | 36.26 |
| Mean-CBV (mL/100 g) | – | 62.057 | 54.296 | 59.763 | 42.308 | 59.428 |
| Mean-ATT (s) | – | 78.068 | 79.656 | 83.918 | 82.676 | 83.406 |
| Max-CBF (mL/100 g/min) | – | 88.25 | 101.222 | 113.375 | 100 | 109 |
| Max-CBV (mL/100 g/min) | – | 137.875 | 152.25 | 184 | 148.25 | 185.125 |
| Max-ATT (s) | – | 120.1875 | 125.222 | 135.1875 | 132.5 | 135 |
MMD, moyamoya disease; CBF, cerebral blood flow; CBV, cerebral blood volume; ATT, arterial transit time.