Abstract #2389
Off-resonance compensated velocity selective RF pulse design for reducing signal dropout in vessel wall imaging
Yunduo Li 1 , Shuo Chen 1 , Zechen Zhou 1 , Rui Li 1 , and Chun Yuan 1,2
1
Center for Biomedical Imaging Research,
Beijing, Beijing, China,
2
Department
of Radiology, University of Washington, Seattle,
Washington, United States
In this study, we improved the design of
velocity-selective RF pulse to compensate signal dropout
due to off-resonance effect and evaluated its
feasibility in carotid vessel wall imaging. Simulation
and in-vivo studies showed that the new VS pulse can
partially compensate the signal dropout in static
tissue, which results in better image quality and
contrast. As improved VS pulse widened the pass band of
VS profile, which sacrificed blood suppression
efficiency in case of slow blood flow causing image
artifacts (Fig.4). A trade-off between off-resonance
compensation and blood suppression efficiency should be
considered to relief off-resonance with efficient blood
suppression.
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