Abstract #4880
Design and Application of a Nested Multi-Channel Sodium/Proton Knee Array at 3T
Ryan Brown 1 , Karthik Lakshmanan 1 , Guillaume Madelin 1 , Gregory Chang 1 , Daniel K Sodickson 1 , Ravinder R Regatte 1 , and Graham C Wiggins 1
1
The Bernard and Irene Schwartz Center for
Biomedical Imaging, Dept. of Radiology, New York
University School of Medicine, New York, NY, United
States
We describe a six channel proton/sodium 3T knee array
whose design counteracts low coil-tissue coupling that
is characteristic of low-gamma coils and can make the
potential gains from a phased array difficult to
realize. This issue was addressed by implementing 1) a
mechanically flexible former to minimize coil-to-tissue
distance and reduce the overall diameter of the array,
and 2) a wideband matching scheme that counteracts
preamplifier noise degradation caused by resonance
frequency splitting and a high loaded coil quality
factor. The sodium array provided at least 30% SNR gain
over a birdcage coil, while proton channel performance
was sufficient for clinical imaging.
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