Items scored by each reader for both DSA and 4D-CTA images
| Item | Options |
|---|---|
| DAVF detected | Yes/no |
| Classification of Borden et al5 | |
| I | Drains through dural sinus |
| II | Retrograde flow from sinus into cortical veins |
| III | Direct flow into cortical veins |
| Classification of Cognard et al1 | |
| I | Antegrade sinusoidal flow |
| II | Reflux: a) sinusoidal, b) arachnoid or both |
| III | Direct flow into cortical veins |
| IV | Same as III, but with venous ectasias |
| V | Flow into perimedullary veins |
| Arterial feeders, large | |
| ECA | |
| ICA | |
| VA | |
| Any combination of the above | |
| Arterial feeders, small | |
| ECA: Occipital artery, auricular artery, superficial temporal artery, middle meningeal artery, ascending pharyngeal artery, internal maxillary artery | |
| ICA: Posterior group, inferolateral trunk, meningohypophyseal trunk, ophthalmic system | |
| VA: Muscular/occipital branches, posterior meningeal artery, posterior inferior cerebellar artery | |
| Any combination of the above | |
| Fistula type | Single hole (focal)/multihole (diffuse) |
| Venous outflow obstruction | Yes/no |
| Isolated/trapped sinus | Yes/no |