2020/02/07 by Masoud S. M. Mollaei, Masoud Sharifian Mazraeh Mollaei, Mollaei, Masoud S. M. +7 · 1 citation
Engineering · Materials Science · Medicine · Physics and Astronomy · #Advanced MRI Techniques and Applications #Atomic and Subatomic Physics Research #FOS: Electrical engineering #FOS: Physical sciences #Lanthanide and Transition Metal Complexes #Medical Physics (physics.med-ph) #Signal Processing (eess.SP) #eess.SP #electronic engineering #information engineering #physics.med-ph
paper · pdf · doi:10.48550/arxiv.2002.03903
arxiv created 2020/02/07 · openalex publication_date 2020/02/07 · arxiv updated 2020/02/11 · openalex created_date 2023/02/19 · openalex updated_date 2026/07/28
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.