Abstract #2711

Improved Decoupling for 13C Coil Arrays Using Non-Conventional Matching and Preamplifier Impedance

Juan Diego Sánchez Heredia¹, Daniel Højrup Johansen¹, Rie Beck Hansen¹, Esben Søvsø Szocska Hansen², Christoffer Laustsen², Vitaliy Zhurbenko¹, and Jan Henrik Ardenkjær-Larsen¹

¹Department of Electrical Engineering, Technical University of Denmark, Kgs. Lyngby, Denmark, ²Department of Clinical Medicine, Aarhus University, Aarhus, Denmark

In this study, we describe a method to obtain improved preamplifier decoupling for receive-only coils. The method relies on the better decoupling obtained when coils are matched to an impedance higher than 50 Ω. Preamplifiers with inductive imaginary impedance and low real impedance, increases the effectiveness of the decoupling. A 2-channel ¹³C array of 50 mm loop coils show an increase of Q-factor of the coils from 247 to 365. The measured SNR, using two small phantoms, demonstrated a similar improvement.

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