Summary of DSA and 4D-CE-MRA findings in 18 DAVFsa
| 4D-CE-MRA | Interobserver Agreementb | 4D-CE-MRA Consensus Reading | DSA | Intermodality Agreementc | ||
|---|---|---|---|---|---|---|
| Reader 1 | Reader 2 | |||||
| Fistula site | ||||||
| CS | 8 | 8 | 17 (94) | 8 | 8 | 18 (100) |
| TS | 8 | 8 | [0.72–0.99] | 8 | 8 | [0.81–1.00] |
| FM | 2 | 1 | 2 | 2 | ||
| Other sites | 0 | 1 | 0 | 0 | ||
| Main feeders | ||||||
| IMA-MMA | 7 | 7 | 14 (78) | 7 | 7 | 16 (89) |
| APA | 7 | 5 | [0.52–0.94] | 5 | 4 | [0.65–0.98] |
| OA | 3 | 5 | 6 | 7 | ||
| ICA | 0 | 0 | 0 | 0 | ||
| Other feeders | 1 | 1 | 0 | 0 | ||
| Venous drainage | ||||||
| Type 1d | 14 | 13 | 16 (89) | 13 | 13 | 18 (100) |
| Type 2e | 3 | 4 | [0.65–0.98] | 4 | 4 | [0.81–1.00] |
| Type 3f | 1 | 1 | 1 | 1 | ||
Note:—4D-CE-MRA indicates 4D contrast-enhanced MR angiography; DSA, digital subtraction angiography; DAVF, dural arteriovenous fistula; CS, cavernous sinus; TS, transverse-sigmoid sinus; FM, sinus adjacent to the foramen magnum; IMA-MMA, internal maxillary artery and/or middle meningeal artery; APA, ascending pharyngeal artery; OA, occipital artery; ICA, internal carotid artery; CI, confidence interval.
a Data are number of DAVFs. Data in parentheses are the percentage of concordance, and data in brackets are exact CIs.
b Agreement of 4D-CE-MRA between reader 1 and reader 2.
c Agreement between the consensus reading at 4D CE-MRA of reader 1 and reader 2 and DSA.
d Venous drainage directly into the dural venous sinus.
e Venous drainage into the dural venous sinus with cortical venous reflux.
f Venous drainage directly into the subarachnoid veins (cortical venous reflux only).