A Simple Approach to Measure and Correct for B0 and Linear Eddy Currents
Lu A, Daniel B, Pauly K
Eddy currents cause artifacts in MR images or distort slice profile during spectral-spatial excitation, and thus often need to be corrected. However, B0 eddy currents and linear eddy currents affect acquisition differently, and characterization of both terms separately may be require special experiment setup and thus time-consuming. In this work, we present a simple approach to extract the B0 and linear eddy current terms simultaneously. Our phantom studies with a multiple-echo projection reconstruction (PR) sequence demonstrate significantly improved image quality with the correction of both terms when the measurements are used to correct the reconstruction.