Effect of location on transcranial power Doppler detection of aneurysms
| DSA | Power Doppler | |
| A comm | 57 | 31 (54) |
| P comm | 34 | 10 (29) |
| MCA | 42 | 14 (33) |
| Basilar | 10 | 6 (60) |
| ICA | 11 | 5 (45) |
| Peri | 9 | 0 |
| PICA | 3 | 1 (33) |
| Ophth | 2 | 0 |
| Total | 168 | 67 (40) |
Numbers in parentheses represent percentage of aneurysms seen by transcranial power Doppler. A comm=anterior communicating artery; P comm=posterior communicating artery; MCA=middle cerebral artery; Peri=pericallosal artery; ICA=terminal internal carotid artery; PICA=posterior inferior cerebellar artery; Ophth=ophthalmic artery.