A parametric study of radiative dipole body array coil for 7 Tesla MRI
Publication date
2020-05
Authors
Hurshkainen, Anna A
Steensma, Bart R
Glybovski, Stanislav B.
Voogt, Ingmar J.
Melchakova, Irina V.
Belov, Pavel A.
van den Berg, Cornelis A T
Raaijmakers, AJE
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Document Type
Article
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taverne
Abstract
In this contribution we present numerical and experimental results of a parametric quantitative study of radiative dipole antennas in a phased array configuration for efficient body magnetic resonance imaging at 7 T via parallel transmission. For magnetic resonance imaging (MRI) at ultrahigh fields (7 T and higher) dipole antennas are commonly used in phased arrays, particularly for body imaging targets. This study reveals the effects of dipole positioning in the array (elevation of dipoles above the subject and inter-dipole spacing) on their mutual coupling, B1 + per Pacc and B1 + per maximum local SAR efficiencies as well as the RF-shimming capability. The numerical and experimental results are obtained and compared for a homogeneous phantom as well as for a real human models confirmed by in vivo experiments.
Keywords
Decoupling, Dipole body arra, SAR efficiency, Transmit efficiency, Ultra-high field MRI, Taverne, Electronic, Optical and Magnetic Materials, Atomic and Molecular Physics, and Optics, Condensed Matter Physics, Hardware and Architecture, Electrical and Electronic Engineering
Citation
Hurshkainen, A A, Steensma, B, Glybovski, S B, Voogt, I J, Melchakova, I V, Belov, P A, van den Berg, C A T & Raaijmakers, A J E 2020, 'A parametric study of radiative dipole body array coil for 7 Tesla MRI', Photonics and Nanostructures - Fundamentals and Applications, vol. 39, 100764. https://doi.org/10.1016/j.photonics.2019.100764