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Abstract #2801

Most small cerebral cortical veins demonstrate significant flow pulsatility: a human phase contrast MRI study at 7T

Ian D Driver1, Maarika Traat1,2, and Richard G Wise1

1Cardiff University Brain Research Imaging Centre, School of Psychology, Cardiff University, Cardiff, United Kingdom, 2Institute of Psychology, University of Tartu, Tartu, Estonia

We demonstrate new methods to identify and quantify the characteristics of flow pulsatility in small cerebral cortical veins to aid better understanding of the haemodynamics of this little-studied vascular compartment. 7T cardiac-gated motion sensitive phase contrast MRI was combined with an automated method for establishing where venous flow is pulsatile, revealing pulsatile flow in 104 out of 132 veins assessed in parietal and frontal regions. Distributions of pulsatility index and pulse waveform delay were characterized, indicating a small delay in cortical veins compared to the superior sagittal sinus, but no differences between veins draining different arterial supply territories.

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