A Cryogenic Solenoid Transmit/Receive Coil Cooled with Liquid Nitrogen for Sodium Imaging at 11.7 T
Kuan Zhang 1 , Lian Xue 1 , Guangfu Xu 2 , Zungang Liu 2 , Erzhen Gao 2 , Q.Y. Ma 2 , Nikolaus M Szeverenyi 3 , and Graeme Bydder 3
Time Medical Systems, Inc, San Diego, CA,
Medical Systems, Inc, China,
of California, San Diego, CA, United States
A cyrogenic solenoid transmit/receive coil resonating at
132 MHz for sodium MRI (11.7T) was constructed and
tested at liquid nitrogen temperature. The tuning
circuit is kept outside the cryostat at room temperature
for easy access. The resonant frequency was tunable over
a 250 kHz range, allowing compensation for various
sample loadings. Images were acquired on a 3 mm thick
anatomical human patella specimen using a Bruker 11.7T
animal MRI scanner, both with this cryo-coil and a room
temperature coil of identical structure for comparison.
A 70% SNR improvement was obtained. The coil package is
small and convenient for commercial use.
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