Artifacts in CSI-measurements caused by the drift of the static magnetic field
O Schmidt, S Widmaier, M Bunse, WI Jung… - … Resonance Materials in …, 2000 - Elsevier
In chemical shift resolved spectroscopic imaging (CSI) temporal changes in the static
magnetic field (drift) can lead to distortions of the phase encoding process. This can result in
localization artifacts. The extent of the artifact depends on the size of the drift, the number of
acquisitions, as well as on the combination of the size of the field of view and the number of
phase encoding gradient steps. Furthermore, it is affected by the succession of the phase
encoding gradients. Precautions are described which allow substantial minimization of the …
magnetic field (drift) can lead to distortions of the phase encoding process. This can result in
localization artifacts. The extent of the artifact depends on the size of the drift, the number of
acquisitions, as well as on the combination of the size of the field of view and the number of
phase encoding gradient steps. Furthermore, it is affected by the succession of the phase
encoding gradients. Precautions are described which allow substantial minimization of the …