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Table 2: 
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) (mm354.5 (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