Tony Stcker1, Kaveh Vahedipour1,
N. Jon Shah1,2
1Institute of Neuroscience and Medicine
- 4, Forschungszentrum Juelich,
Curved
spatially-varying magnetic fields have a strong impact on MRI, especially in
the context of correcting magnetic field inhomogeneities (shimming). New
progress from hardware and sequence development intends to overcome certain
limitations, e.g. by the use of higher-order shim coils or the application of
spatially-selective dynamic shimming. Beyond field corrections, curved field
gradients are also under discussion for region-specific zoomed spatial
encoding with reduced peripheral nerve stimulations. However, the gains from
such strategies are hardly predictable without simulations. Here, a framework
for exact numerical MRI simulations of nonlinear spatially-varying pulsed
magnetic fields is presented.
Keywords