High-Permittivity Thin Dielectric Pad Improves Peripheral Non-Contrast MRA at 3T
Marc D Lindley 1,2 , Daniel Kim 1 , Glen Morrell 1 , Marta E Heilbrun 1 , Pippa Storey 3 , Christopher J Hanrahan 1 , and Vivian S Lee 1
UCAIR, Radiology, University of Utah, Salt
Lake City, Utah, United States,
University of Utah, Salt Lake City, Utah, United States,
New York University, New York, United States
Non-contrast MRA based on subtraction of two FSE
acquisitions of the thigh at 3T suffers from signal loss
in right femoral common artery due to B1+
inhomogeneities. We propose to recover the signal loss
with high-permittivity dielectric padding. In 11
subjects, apparent CNR, normalized B1, and image quality
scores verified superior performance with custom-made
high-permittivity dielectric padding in comparison with
baseline and commercially available dielectric padding.
Our study shows that signal loss in right common femoral
artery in non-contrast MRA at 3T is recovered with
high-permittivity dielectric padding.
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