Abstract #3703
In vivo accelerated, motion-corrected free-breathing 3T intravascular MRI
Shashank Sathyanarayana Hegde 1 , Yi Zhang 1,2 , and Paul A Bottomley 2,3
1
Radiology, Johns Hopkins University,
Baltimore, Maryland, United States,
2
Electrical
and Computer Engineering, Johns Hopkins University,
Baltimore, Maryland, United States,
3
Radiology,
Johns Hopkins University, Maryland, United States
High-resolution intravascular (IV) MRI is susceptible to
degradation from physiological motion, and requires high
frame-rates for true endoscopy. Traditional cardiac
gating techniques are inefficient in scan-time usage and
reduce the effective frame rate. Here, sparse ungated
radial sampling is combined with motion correction using
frame-by-frame projection shifting based on a
singularity at the probes location, to provide reduced
motion sensitivity with up to a four-fold effective
increase in image acquisition speed. We demonstrate
free-breathing ~200m resolution
in
vivo
intravascular
MRI in rabbit aorta.
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