BOSS classification of the overall patient cohort according to Caroff et al6
| BOSS Classification | Description | Distribution No. (%) |
|---|---|---|
| 0 | No residual flow inside the aneurysm or the WEB | 19 (28.4%) |
| 0′ | Opacification of the proximal recess of the WEB | 22 (32.8%) |
| 1 | Residual flow inside the WEB | 11 (16.4%) |
| 2 | Neck remnant | 12 (17.9%) |
| 3 | Aneurysm remnant | 3 (4.5%) |
| 1 + 3 | Contrast media depicted inside and around the device | 0 (0%) |