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Accueil › Scientific publications › Analysis of High Impedance Coils both in Transmission and Reception Regimes

Analysis of High Impedance Coils both in Transmission and Reception Regimes

juillet 17, 2020

MOLLAEI Masoud SM, VAN LEEUWEN Carel C., RAAIJMAKERS Alexander JE and SIMOVSKI Constantin R.  Analysis of High Impedance Coils both in Transmission and Reception Regimes, IEEE, Fev 2020

DOI : 10.1109/ACCESS.2020.3009367

Abstract

Theory of a high impedance coil (HIC) – a cable loop antenna with a modified shield – is discussed comprehensively for both in transmitting and receiving regimes. Understanding a weakness of the previously reported HIC in transmitting regime, we suggest another HIC which is advantageous in both transmitting and receiving regimes compared to a conventional loop antenna. In contrast with a claim of previous works, only this HIC is a practical transceiver HIC. Using the perturbation approach and adding gaps to both shield and inner wire of the cable, we tune the resonance frequency to be suitable for ultra-high field (UHF) magnetic resonance imaging (MRI). Our theoretical model is verified by simulations. Designing the HIC theoretically, we have fabricated an array of three HICs operating at 298 MHz. The operation of the array has been experimentally studied in presence of different phantoms used in UHF MRI and the results compared with those obtained for a conventional array.

Keywords : High Impedance ,Magnetic resonance imaging, Transceiver antenna

Partners : AALTO University (Department of Electronics and Nanoengineering),  UMC UTRECHT (Department of Radiology)

Published in: IEEE Access

https://arxiv.org/pdf/2002.03903.pdf

juillet 17, 2020

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