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Permanent link (DOI): https://doi.org/10.7939/R3QN5ZK9C

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Strategies for Maximizing Signal to Noise in Decoupled Receive Coil Arrays for Magnetic Resonance Imaging Open Access

Descriptions

Other title
Subject/Keyword
Capacitance
Magnetic Resonance Imaging
Radio Frequency
Signal to Noise
Coils
Type of item
Thesis
Degree grantor
University of Alberta
Author or creator
Maunder, Adam M
Supervisor and department
Mousavi, Pedram (Electrical and Computer Engineering)
De Zanche, Nicola (Oncology)
Daneshmand, Mojgan (Electrical and Computer Engineering)
Examining committee member and department
Wachowicz, Keith (Oncology)
Daneshmand, Mojgan (Electrical and Computer Engineering)
Mousavi, Pedram (Electrical and Computer Engineering)
Hossain, Masum (Electrical and Computer Engineering)
De Zanche, Nicola (Oncology)
Department
Department of Electrical and Computer Engineering
Specialization
Biomedical Engineering
Date accepted
2013-09-28T19:56:22Z
Graduation date
2013-11
Degree
Master of Science
Degree level
Master's
Abstract
Designing radio frequency coil arrays for optimal Magnetic Resonance Imaging (MRI) has been a wide area of interest for many years. The optimum coil type for high density arrays and the mitigation of coupling between elements in arrays are significant problems addressed in this thesis. Coupling causes signal and noise transfer between coils, which affects optimum preamplifier noise matching, can cause resonant frequency splitting and degrade individual coil sensitivities. A theoretical framework for modeling capacitive coupling between array elements is developed and it is shown that coils can be completely decoupled by modified capacitive coupling without loss of SNR performance. Composite coils are three naturally decoupled orthogonal coils. During the design and testing of an 8-coil composite coil array their potential benefits in terms of SNR and parallel imaging are demonstrated. Also, composite arrays are compared to surface arrays with equal element count in relation to the maximum theoretical performance.
Language
English
DOI
doi:10.7939/R3QN5ZK9C
Rights
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
Citation for previous publication
A. M. Maunder, M. Daneshmand, P. Mousavi, B. G. Fallone and N. De Zanche, "Parasitic capacitance in MRI coil arrays: Models and application to Array decoupling," in Microwave Symposium Digest, 2013

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