| Purpose of the examination | Number of cases | |
| Aneurysm | Preoperation | 20 |
|
| Postoperation | 16 |
| Dissection, stenosis, occlusion and hemorrhage | 7 | |
| Evaluation of vessels before surgery | 10 | |
| Position of the fluoroscopic slice | Number of cases | |
| External acoustic foramen | 3 | |
| Distal internal carotid artery | 47 | |
| Insular arteries | 3 | |