Ratios of vessel diameters in the anterior circle of Willis
| Patient | A1 Segment/M1 Segment | A1 Segment/ICA | M1 Segment/ICA | PED/M1 Segment | Ipsilateral A1 Segment/Contralateral A1 Segment |
|---|---|---|---|---|---|
| 1 | 0.29 | 0.28 | 0.88 | 1.34 | 0.38 |
| 2 | 1.12 | 0.66 | 0.59 | 1.72 | 1.42 |
| 3 | 0.5 | 0.38 | 0.76 | 1.3 | 0.79 |
| 4 | 0.66 | 0.45 | 0.68 | 1.45 | 0.75 |
| 5 | 0.72 | 0.46 | 0.64 | 1.59 | 0.98 |
| 6 | 0.76 | 0.55 | 0.73 | 1.36 | 1.44 |
| 7 | 0.57 | 0.53 | 0.93 | 1.09 | 0.79 |