Simple algorithm for the correction of MRI image artefacts due to random phase fluctuations

Fast Field-Cycling (FFC) MRI is a novel technology that allows varying the main magnetic field B0 during the pulse sequence, from the nominal field (usually hundreds of millitesla) down to Earth's field or below. This technique uses resistive magnets powered by fast amplifiers. One of the challenges with this method is to stabilise the magnetic field during the acquisition of the NMR signal. Indeed, a typical consequence of field instability is small, random phase variations between each line of k-space resulting in artefacts, similar to those which occur due to homogeneous motion but harder to correct as no assumption can be made about the phase error, which appears completely random.

Source: Magnetic Resonance Imaging - July 24, 2017 Category: Radiology Authors: Lionel M. Broche, P. James Ross, Gareth R. Davies, David J. Lurie Tags: Original contribution Source Type: research