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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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