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A flexible transceiver array employing transmission line resonators for cardiac MRI at 7 T

Abstract : This PhD thesis was conducted in the frame of a bilateral project between the laboratoire d’Imagerie par Résonance Magnétique Médicale et Multi-Modalités (IR4M) at Université Paris-Sud (Orsay, France) and the Center for Medical Physics and Biomedical Engineering (CMPBME) at the Medical University of Vienna (Vienna, Austria). The main objective of this work was to develop a flexible transceiver RF coil array for 7 T MRI. Coil arrays benefit from the high SNR of small surface coils over an extended field of view (FOV). Furthermore, array coils enable the use of parallel imaging (PI) techniques for accelerated image acquisition and pTx algorithms that can be used to produce a homogeneous transmit field which is of importance in MRI. This project targets the design, development, implementation and evaluation of a flexible RF coil array based on the transmission line resonator (TLR) principle. TLRs are inherently monolithic and self-resonant structures, i.e. there is no need for lumped element capacitors to tune the coil. 3D electromagnetic simulation (EMS) together with bench and MRI experiments were performed to evaluate the performance of the developed array in flat and bent configuration.
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Submitted on : Sunday, April 1, 2018 - 1:01:59 AM
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  • HAL Id : tel-01756163, version 1

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Sajad Hossein Nezhadian. A flexible transceiver array employing transmission line resonators for cardiac MRI at 7 T. Medical Physics [physics.med-ph]. Université Paris Saclay (COmUE), 2017. English. ⟨NNT : 2017SACLS492⟩. ⟨tel-01756163⟩

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