Design and performance issues of RF coils utilized in ultra high field MRI: experimental and numerical evaluations

TS Ibrahim, A Kangarlu… - IEEE Transactions on …, 2005 - ieeexplore.ieee.org
In this paper, two TEM resonators were evaluated experimentally and numerically at 8 tesla
(T)(340 MHz for/sup 1/H imaging). The coils were constructed to be 21.2-cm long (standard) …

Combination of surface and 'vertical'loop elements improves receive performance of a human head transceiver array at 9.4 T

NI Avdievich, IA Giapitzakis, A Pfrommer… - NMR in …, 2018 - Wiley Online Library
Ultra‐high‐field (UHF,≥ 7 T) human magnetic resonance imaging (MRI) provides
undisputed advantages over low‐field MRI (≤ 3 T), but its development remains challenging …

A platform for 4-channel parallel transmission MRI at 3 T: Demonstration of reduced radiofrequency heating in a test object containing an implanted wire

B Yang, PS Wei, CE McElcheran, F Tam… - Journal of Medical and …, 2019 - Springer
Objective To describe a platform for 4-channel parallel transmission (pTx) integrated on a 3
T MRI system; to demonstrate utility of the platform with a pTx method to reduce localized …

Three‐dimensional static and dynamic parallel transmission of the human heart at 7 T

CS Aigner, S Dietrich, S Schmitter - NMR in biomedicine, 2021 - Wiley Online Library
Three‐dimensional (3D) human heart imaging at ultra‐high fields is highly challenging due
to respiratory and cardiac motion‐induced artifacts as well as spatially heterogeneous …

Ultrahigh-field MRI whole-slice and localized RF field excitations using the same RF transmit array

TS Ibrahim - IEEE transactions on medical imaging, 2006 - ieeexplore.ieee.org
In this paper, a multiport driving mechanism is numerically implemented at ultra high-field
(UHF) magnetic resonance imaging (MRI) to provide 1) homogenous whole-slice (axial …

[HTML][HTML] Flexible 23-channel coil array for high-resolution magnetic resonance imaging at 3 Tesla

R Frass-Kriegl, LI Navarro de Lara, M Pichler, J Sieg… - PloS one, 2018 - journals.plos.org
Purpose The purpose of this work is the design, implementation and evaluation of a
mechanically flexible receive-only coil array for magnetic resonance imaging (MRI) at 3 T …

Parallel-transmission-enabled magnetization-prepared rapid gradient-echo T1-weighted imaging of the human brain at 7 T

MA Cloos, N Boulant, M Luong, G Ferrand, E Giacomini… - Neuroimage, 2012 - Elsevier
One of the promises of Ultra High Field (UHF) MRI scanners is to bring finer spatial
resolution in the human brain images due to an increased signal to noise ratio. However, at …

[HTML][HTML] Ultra-high field cardiac MRI in large animals and humans for translational cardiovascular research

LM Schreiber, D Lohr, S Baltes, U Vogel… - Frontiers in …, 2023 - frontiersin.org
A key step in translational cardiovascular research is the use of large animal models to
better understand normal and abnormal physiology, to test drugs or interventions, or to …

[HTML][HTML] Improvement in B1+ Homogeneity and Average Flip Angle Using Dual-Source Parallel RF Excitation for Cardiac MRI in Swine Hearts

M Schär, H Ding, DA Herzka - PLoS One, 2015 - journals.plos.org
Cardiac MRI may benefit from increased polarization at high magnetic field strength of 3
Tesla but is challenged by increased field inhomogeneity. Initial human studies have shown …

Parallel‐transmission‐enabled three‐dimensional T2‐weighted imaging of the human brain at 7 Tesla

A Massire, A Vignaud, B Robert… - Magnetic resonance …, 2015 - Wiley Online Library
Purpose: A promise of ultra high field MRI is to produce images of the human brain with
higher spatial resolution due to an increased signal to noise ratio. Yet, the shorter …