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Abstract #0244

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

1 UCAIR, Radiology, University of Utah, Salt Lake City, Utah, United States, 2 Physics, University of Utah, Salt Lake City, Utah, United States, 3 Radiology, 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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