Abstract #2713

The Communicating Arteries Redistribute Blood Flow in the Circle of Willis with Hypoplastic Segments: Intracranial 4D flow MRI at 7 Tesla

Pim van Ooij¹, Matthan Caan¹, Bart M. W. Cornelissen², Henk A Marquering², Pieter Buur³, Gustav J Strijkers², Jeroen Hendrikse⁴, and Aart J Nederveen¹

¹Radiology, Academic Medical Center, Amsterdam, Netherlands, ²Biomedical Engineering & Physics, Academic Medical Center, Amsterdam, Netherlands, ³Spinoza Center for Neuroimaging, Amsterdam, Netherlands, ⁴Radiology, University Medical Center Utrecht, Utrecht, Netherlands

In this study it was investigated if the communicating arteries redistribute blood flow in the circle of Willis (coW) with hypoplastic arteries. For this purpose, 4D flow MRI at 7 Tesla was used in ten healthy volunteers. 50% of the participants had a full coW, whereas 50% had hypoplastic or missing segments. Significant correlations were found for time-averaged blood flow (mL/s) between the left /right posterior communicating artery and the left/right posterior cerebral artery and between the anterior communicating artery and the right anterior cerebral artery. This finding illustrates that flow is redistributed through the communicating arteries in the coW.

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