Abstract #1629

Investigation of the relationship between anatomical morphology of circle of Willis and the primary collateral blood flow based on t-ASL

Zhangli Xing¹, Yunjing Xue¹, Bin Sun¹, and Pu-Yeh Wu²

¹Fujian Medical University Union Hospital, Fuzhou, China, ²GE Healthcare, MR Research China, Beijing, China

We used 3D-TOF-MRA and territorial-ASL (t-ASL) maps to investigate the relationship between anatomical morphology of circle of Willis (CoW) and the primary collateral blood flow in physiological conditions. We found that the primary collateral blood flow had a direct relationship with anatomical structure of CoW. A1 segment has a role in controlling the blood flow in anterior circulation, while in posterior circulation, P1 segment and PcomA cooperate to dominate the blood flow.

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