Figure 1From: Four-dimensional noncontrast-enhanced MR angiography at ultrahigh fieldVolumetric MIPs at every 4th frame up to 1.02 s post labeling (upper row). Normalized signal intensity over 2 RR intervals at 5 locations over all 28 frames encompassing 1.68 seconds after labeling (lower row). The zoomed region on which the ROIs are placed is demarcated in the last frame of the upper row..Back to article page