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Abstract #1500

A Nested Dual Frequency Birdcage/Stripline Coil for Sodium/Proton Brain Imaging at 7T

Graham C. Wiggins1, Ryan Brown1, Lazar Fleysher1, Bei Zhang1, Bernd Stoeckel2, Matilde Inglese1,3, Daniel K. Sodickson1

1Radiology, Center for Biomedical Imaging, NYU School of Medicine, New York, NY, United States; 2Siemens Medical Solutions USA Inc., New York, NY, United States; 3Neurology , NYU Medical Center, New York, NY, United States

The design of a novel dual frequency coil for 7T sodium/proton brain imaging is discussed. The nested coil utilized a high-pass birdcage for sodium detection and an eight-channel stripline array for proton detection. This design showed minimal interaction between the sodium and proton coils, allowing independent tuning at both frequencies. The proton striplines partially shielded the sodium birdcage, resulting in only an 8% SNR loss compared to that of the isolated birdcage, while transmit efficiency was reduced by 20%. The proton stripline coil provided adequate sensitivity for anatomical imaging and B0 shimming.