Abstract #4808
Optimization of 7 T YBCO Coils for in-vivo and ex-vivo MRI of Small Animals; Assessment of Achievable SNR Gain
Jarek Wosik 1,2 , Kurt H. Bockhorst 3 , Krzysztof Nesteruk 4 , Dhivya Ketharnath 1 , Tan I-Chih 5 , and Ponnada A Narayana 3
1
Electrical and Computer Engineering,
University of Houston, Houston, Texas, United States,
2
Texas
Center for Superconductivity, University of Houston,
Houston, Texas, United States,
3
Health
Science Center, University of Texas, Houston, Texas,
United States,
4
Polish
Academy of Sciences, Institute of Physics, Warsaw,
Poland, Poland,
5
Center
for Molecular Imaging, University of Texas, Houston,
Texas, United States
We report on assessment of achievable SNR gain due to
reduction of thermal noise by cooling receiver coil made
out of copper or superconducting materials. High field
MRI 300 MHz receiver probe with tuning/matching and
decoupling circuitry was used. The coil was fabricated
by patterning double-sided thin superconducting YBCO
film on 0.4 mm thick sapphire substrate and comprises of
two split rings rotated 180 deg. versus each other. Our
main interest in this work is in identification all
losses limiting SNR, such as rf losses from coil, body,
cryostat and tuning/maching/decoupling circuitry and in
discussion on the probe performance optimization.
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