Abstract #3505

Performance of 7 Tesla Normal Metal and Superconducting Cryo-coils for MRI of Rat Brain

Jarek Wosik^1,2, Kurt Bockhorst³, Tan I-Chih⁴, Kuang Qin¹, Krzysztof Nesteruk⁵, and Ponnada A Narayana³

¹Electrical and Computer Engineering, University of Houston, Houston, TX, United States, ²Texas Center for Superconductivity, University of Houston, Houston, TX, United States, ³Radiology, The University of Texas Health Science Center, Houston, TX, United States, ⁴The Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center, Houston, TX, United States, ⁵Institute of Physics of Polish Academy of Science, Warsaw, Poland

We report on the performance of receive only 300-MHz planar cryogenic (both copper and superconducting) coils for MRI of rat brain at 7 T. The double-sided coils were fabricated by patterning Cu and YBCO on laminate and 0.33 mm thick sapphire substrate, respectively. Practical limits of the performance of the cryocoils (20 mm Cu and 17 mm superconducting) were tested using 3D-RARE, 2D-RARE, and RGB-FA maps recorded with EPI_DTI protocols. Both in-vivo and ex-vivo images were acquired. Twofold SNR gain was achieved at 65K. Cryo-system stability tests with over 11 hours of DTI ex-vivo scanning are presented.

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