Pseudo-continuous arterial spin labeling evaluation of collateral circulation at 7T and 3T MRI in Moyamoya disease

We compared the performance of pseudo-continuous arterial spin labeling (ASL) between ultrahigh field 7T MRI and 3T MRI in evaluating collateral circulation based on arterial transit artifact (ATA) in Moyamoya disease (MMD). 7T ASL shows more subtle hypoperfusion and more prominent ATA as compared with 3T ASL. The performance of collateral circulation assessment is more favorable by 7T ASL. These findings render 7T ASL a competing none-invasive approach in the management of MMD.