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Conference paper

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

By Sanchez, Juan Diego1,2,3; Johansen, Daniel Højrup1,2,3,4; Hansen, Rie Beck1,2,3; Hansen, Esben S.5; Laustsen, Christoffer5; Zhurbenko, Vitaliy1,2,3,4; Ardenkjær-Larsen, Jan Henrik1,2,3

From

Center for Hyperpolarization in Magnetic Resonance, Centers, Technical University of Denmark1

Department of Electrical Engineering, Technical University of Denmark2

Center for Magnetic Resonance, Department of Electrical Engineering, Technical University of Denmark3

Electromagnetic Systems, Department of Electrical Engineering, Technical University of Denmark4

Aarhus University5

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 . Preamplifiers with inductive imaginary impedance and low real impedance, increase 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.

Language: English
Year: 2017
Proceedings: ISMRM 25th Annual Meeting & Exhibition
Types: Conference paper
ORCIDs: Sanchez, Juan Diego , Johansen, Daniel Højrup , Hansen, Rie Beck , Zhurbenko, Vitaliy and Ardenkjær-Larsen, Jan Henrik

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