HR-MR imaging characteristics of lesions in symptomatic patients with CICAO
| Total (n = 114) | Successful (n = 76) | Unsuccessful (n = 38) | P | |
|---|---|---|---|---|
| Right (No.) (%) | 67 (58.8) | 42 (55.2) | 25 (65.8) | .282 |
| Tapered stump (No.) (%) | 64 (56.1) | 48 (63.2) | 16 (42.1) | .033 |
| Level of reversed distal ICA flow | <.001 | |||
| Communicating segment (No.) (%) | 8 (7.0) | 2 (2.6) | 6 (15.8) | |
| Ophthalmic segment (No.) (%) | 12 (10.5) | 2 (2.6) | 10 (26.3) | |
| Clinoid segment (No.) (%) | 23 (20.2) | 14 (18.4) | 9 (23.7) | |
| Cavernous segment (No.) (%) | 32 (28.1) | 24 (31.6) | 8 (21.1) | |
| Petrous segment or below (No.) (%) | 39 (34.2) | 34 (44.7) | 5 (13.2) | |
| Collateral circulation | ||||
| Primary (No.) (%) | 64 (56.1) | 39 (51.3) | 25 (65.8) | .142 |
| Secondary (No.) (%) | 25 (21.9) | 12 (15.7) | 13 (34.2) | .025 |
| Proximal occlusion | ||||
| Lesion length (mean) (mm) | 21.9 (SD, 4.2) | 20.7 (SD, 5.4) | 23.9 (SD, 4.8) | <.005 |
| Lesion volume (mean) (mm3) | 1084.8 (SD, 472.5) | 1007.3 (SD, 453.4) | 1159.1 (SD, 486.1) | .110 |
| Lipid-rich necrotic core (mean) (mm3) | 143.3 (SD, 76.6) | 167.2 (SD, 74.2) | 139.8 (SD, 54.5) | <.050 |
| Hemorrhage (mean) (mm3 | 54.5 (SD, 43.1) | 58.4 (SD, 46.7) | 53.6 (SD, 40.4) | .510 |
| Calcification (mean) (mm3) | 112.9 (SD, 96.4) | 41.3 (SD, 39.5) | 141.9 (SD, 107.8) | <.001 |
| Dense fibrous tissue (mean) (mm3) | 708.2 (SD, 391.1) | 689.6 (SD, 372.3) | 738.8 (SD, 437.6) | .611 |
| Loose matrix (mean) (mm3) | 250.3 (SD, 130.5) | 219.7 (SD, 103.8) | 257.9 (SD, 141.6) | .120 |
| Distal occlusion | ||||
| Lumen iso -to hypointensity (No.) (%) | 60 (52.6) | 45 (59.2) | 15 (39.5) | .047 |
| Lumen area (mean) (mm2) | 6.28 (SD, 3.5) | 7.4 (SD, 3.4) | 3.9 (SD, 2.3) | <.001 |
| Wall area (mean) (mm2) | 32.7 (SD, 6.9) | 32.0 (SD, 6.8) | 33.4 (SD, 8.7) | .340 |