Abstract
Background Non-contrast magnetic resonance angiography (NC-MRA) is an alternative diagnostic tool for assessment of peripheral vascular disease in patients with impaired kidney function. While peripheral NC-MRA based on subtraction of two turbo-spin-echo acquisitions may benefit from increased signal-to-noise ratio (SNR) at 3T, it also suffers from signal loss in the right femoral artery due to B1 inhomogeneities[1], which can be minimized using highpermittivity dielectric pads[2]. The purpose of this study was to utilize high-permittivity dielectric pad to reduce NC-MRA signal loss associated with B1 inhomogeneity.
Highlights
Non-contrast magnetic resonance angiography (NC-MRA) is an alternative diagnostic tool for assessment of peripheral vascular disease in patients with impaired kidney function
Images were graded by three radiologists in consensus on a Likert scale 1-5(worst-best) for conspicuity of common femoral arteries
The mean normalized B1, CNR, and conspicuity score in the right common femoral artery were significantly better with high-permittivity pad acquisitions than baseline and commercial pad acquisitions(p < 0.001)
Summary
Non-contrast magnetic resonance angiography (NC-MRA) is an alternative diagnostic tool for assessment of peripheral vascular disease in patients with impaired kidney function. While peripheral NC-MRA based on subtraction of two turbo-spin-echo acquisitions may benefit from increased signal-to-noise ratio (SNR) at 3T, it suffers from signal loss in the right femoral artery due to B1 inhomogeneities[1], which can be minimized using highpermittivity dielectric pads[2]. The purpose of this study was to utilize high-permittivity dielectric pad to reduce NC-MRA signal loss associated with B1 inhomogeneity
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