Prediction of Susceptibility-Induced Artefacts for Prospective Motion Correction

Rainer Boegle¹, Julian Maclaren¹, Maxim Zaitsev¹

In prospective motion correction, orientation and position changes of the imaged object lead to susceptibility-induced image distortions. In real time imaging, like real-time fMRI it is not possible to acquire field maps of the object for each step in the time series. We therefore apply a method for rapidly calculating field inhomogeneities for an object with a known susceptibility distribution. The resulting field maps are compared to acquired field maps for a custom-made phantom and found to match well. This is an important step towards prediction and correction of susceptibility-induced image distortions in prospective motion correction.