Fig. 1.

A) Two trials of the field map acquisition during expired/inspired breath-holds in one subject. Displayed are the magnitude image with an outline of the spinal cord mask (left), the expired/inspired field maps (center) and the difference between the field maps (right). B) The measured $\text{Δ}{B}_0\left(z\right)$ inside the spinal cord, shown for all three trials acquired in this subject.