Figure 1.
Wire patterns for three actively shielded gradient coils investigated in this work: Two body coils (BG1 and BG2) and one head gradient system (HG1). The primary winding patterns in blue are mainly designed for generation of the linear gradient fields, whereas the secondary windings in red are primarily designed for achieving zero field outside the gradient volume (active shielding). For reference, we show a 20 cm diameter sphere at the iso-center. Modeling of multiple coils in this work allows us not only to validate the accuracy of our PNS simulations framework but also to verify that we correctly rank different coil designs with respect to PNS.