Abstract #3639

Decoupling Scheme for a Cryogenic Rx-Only RF Coil for 13C Imaging at 3T

Juan D. Sánchez-Heredia¹, Esben Søvsø Szocska Hansen^2,3, Christoffer Laustsen², Vitaliy Zhurbenko¹, and Jan H. Ardenkjær-Larsen ¹

¹Department of Electrical Engineering, Technical University of Denmark, Kgs Lyngby, Denmark, ²MR Research Centre, Department of Clinical Medicine, Aarhus University, Aarhus, Denmark, ³Danish Diabetes Academy, Odense, Denmark

In this study we evaluate the different active decoupling schemes that can be used to drive an Rx-only coil, in order to determine the optimal design for ¹³C MRI at 3T. Three different circuit schemes are studied: two known ones (with regular series and parallel tuning respectively), and a novel one which we found to be optimal for this case. The circuits have been cooled to 77K to reduce coil noise. Preliminary tests with the preamplifier cooled to 77K for reduction of noise figure, are also reported.

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