Mixed Cerebral Perfusion Territories in the Posterior Circulation Investigated using Super-Selective Arterial Spin Labeling MRI

Nolan S. Hartkamp¹, M. Helle², J. Hendrikse¹, M. J. P. van Osch³

A previous research group proposed there was little evidence of mixing of blood in the basilar artery as they observed separate perfusion territories for both vertebral arteries in the cerebellum and cerebrum. The proposition of blood not mixing in the basilar artery was demonstrated with regional perfusion arterial spin labeling (ASL) MR imaging. A method that depends on clustering voxels by using a cut-off value or by more advanced techniques such as k-means clustering. It may be argued these techniques do not accurately reflect mixed perfusion territories. Therefore we aim to investigate this observation with a more suitable method.