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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