Can signal intensity of silent MRA represent hemodynamic information in BAVM？

Motivation: Quantitative assessment of hemodynamic changes in brain arteriovenous malformation (BAVM) can characterize BAVM vascular pathophysiology. Goal(s): To investigate whether the signal intensity of silent MRA reflects hemodynamic information of BAVM Approach: The correlations between the signal intensities of feeding arteries (FA), draining veins (DV), and non-feeding arteries of BAVM on silent MRA and the hemodynamic parameters of corresponding vessels on 4D Flow MRI were analyzed. Results: In non-FAs and DVs, signal intensities of silent MRA were significantly positively correlated with blood flow and velocity of 4D Flow, whereas the correlation was not significant in FAs of BAVM. Impact: As a three-dimensional, pseudo continuous arterial spin labeling (pcASL),contrast-free MR angiography, signal intensity of silent MRA can reflect blood flow and velocity in non-FAs and DVs, but does not seem to follow this pattern when assessing FAs of BAVM.