Typical Quantitative Susceptibility Mapping (QSM) sequences have a long acquisition time which may yield motion artifacts that alter magnitude, phase and susceptibility values in the brain. Simulations and motion experiments were conducted on patients suspected of stroke and healthy volunteers to calculate the variations of susceptibility, magnitude and local field in brain. Variations between susceptibility and magnitude images were compared. In general, magnitude images were found to be more affected by motion than QSM in the brain areas studied.
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