TY - JOUR
T1 - A parametric study of radiative dipole body array coil for 7 Tesla MRI
AU - Hurshkainen, Anna A.
AU - Steensma, Bart
AU - Glybovski, Stanislav B.
AU - Voogt, Ingmar J.
AU - Melchakova, Irina V.
AU - Belov, Pavel A.
AU - van den Berg, Cornelis A.T.
AU - Raaijmakers, Alexander J.E.
PY - 2020/5
Y1 - 2020/5
N2 - 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.
AB - 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.
KW - Decoupling
KW - Dipole body arra
KW - SAR efficiency
KW - Transmit efficiency
KW - Ultra-high field MRI
UR - http://www.scopus.com/inward/record.url?scp=85079687594&partnerID=8YFLogxK
U2 - 10.1016/j.photonics.2019.100764
DO - 10.1016/j.photonics.2019.100764
M3 - Article
AN - SCOPUS:85079687594
SN - 1569-4410
VL - 39
JO - Photonics and Nanostructures - Fundamentals and Applications
JF - Photonics and Nanostructures - Fundamentals and Applications
M1 - 100764
ER -