Figure 2
From: Four-dimensional noncontrast-enhanced MR angiography at ultrahigh field
4D ASL MRA sequence. The label volume is acquired with an inversion labeling (IR) pulse on and the control volume with the IR pulse off. Background suppression (BS) is applied in the imaging volume for label and control volume acquisitions. The locations for the dynamically applied B1+ shim solutions are shown by the labels “Shim 1” and “Shim 2”.