Fig 4.

Scatter- and Bland-Altman plots comparing CBV estimates for the (0 + 1) dosing scheme at 3T (A and B) and at 1.5T (C and D), using the intermediate (red) and low (blue) flip angle protocols. At both 3T and 1.5T, CBV measured using an intermediate flip angle yielded poor accuracy and precision (API = 0.43 and 0.08), respectively. Whereas the use of a low flip angle substantially improved CBV reliability at both 3T (API = 0.83) and 1.5T (API = 0.84), respectively. Leakage correction was applied using BSW.