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Abstract #3762

Improved spoiling efficiency in dynamic RF-spoiled imaging by ghost phase modulation and temporal filtering

Jon-Fredrik Nielsen 1 and Douglas C Noll 1

1 Biomedical Engineering, University of Michigan, Ann Arbor, MI, United States

RF-spoiled steady-state sequences (SPGR/T1-FFE/FLASH) offer rapid data acquisition and T1-weighting. The unbalanced gradient lobes (spoiler gradients) in these sequences are generally chosen empirically to be sufficiently large to achieve good spoiling and suppress ghosting artifacts, however the required spoiler gradient size for good ghost suppression is subjective and application-dependent. We present a simple acquisition and data processing strategy for improved ghost suppression in dynamic (or averaged) SPGR imaging, based on dynamically modulating the phase of the ghosts at the Nyquist frequency and removing that frequency component in pre-processing.

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