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Table 3: Distribution of venous contamination at CE-MRA and TR-MRA in the 3 groups^{^a}
Arterial Segment Group A Group B Group C
Grade 0 Grade 1 Grade 2 Grade 3 Grade 0 Grade 1 Grade 2 Grade 3 Grade 0 Grade 1 Grade 2 Grade 3
Right brachiocephalic trunk 138/137 1/1 0/1 0/0 164/165 4/4 1/0 0/0 154/154 0/0 0/0 0/0
Right subclavian artery 61/118 77/19 1/2 0/0 64/123 104/40 1/6 0/0 59/115 93/35 2/4 0/0
Left subclavian artery 128/136 11/0 0/3 0/0 164/168 5/1 0/0 0/0 142/147 10/6 2/1 0/0
Right CCA 110/134 29/4 0/1 0/0 146/156 23/12 0/1 0/0 112/139 41/14 1/1 0/0
Right extracranial ICA 25/101 114/38 0/0 0/0 21/119 148/50 0/0 0/0 5/111 148/43 1/0 0/0
Right intracranial ICA 24/108 109/31 6/0 0/0 24/120 138/49 6/0 1/0 30/114 120/39 4/1 0/0
Left CCA 125/133 14/5 0/1 0/0 158/167 11/2 0/0 0/0 140/148 13/5 1/1 0/0
Left extracranial ICA 28/103 111/36 0/0 0/0 24/111 145/58 0/0 0/0 15/109 137/45 2/0 0/0
Left intracranial ICA 25/97 102/40 12/2 0/0 19/115 142/53 8/1 0/0 32/112 115/42 7/0 0/0
Right vertebral artery orifice 122/137 17/1 0/1 0/0 151/160 17/6 1/3 0/0 132/145 22/7 0/2 0/0
Right vertebral artery 54/112 84/27 1/0 0/0 68/139 101/29 0/1 0/0 45/126 104/27 5/1 0/0
Left vertebral artery orifice 132/139 7/0 0/0 0/0 166/167 3/1 0/1 0/0 143/151 10/3 0/0 1/0
Left vertebral artery 51/115 86/24 2/0 0/0 63/145 105/24 1/0 0/0 51/131 101/22 2/1 0/0
Basilar artery 29/119 103/16 6/4 1/0 51/142 105/25 13/2 0/0 36/134 111/20 7/0 0/0
↵a Data are number of segments for CE-MRA/TR-MRA.