Parallel transmission for ultrahigh field MRI

CM Deniz - Topics in Magnetic Resonance Imaging, 2019 - journals.lww.com
Magnetic resonance imaging (MRI) has been driven toward ultrahigh magnetic fields (UHF)
in order to benefit from correspondingly higher signal-to-noise ratio and spectral resolution …

Evolution of UHF body imaging in the human torso at 7T: technology, applications, and future directions

MA Erturk, X Li, PF Van de Moortele… - Topics in Magnetic …, 2019 - journals.lww.com
The potential value of ultrahigh field (UHF) magnetic resonance imaging (MRI) and
spectroscopy to biomedical research and in clinical applications drives the development of …

Universal pulses: a new concept for calibration‐free parallel transmission

V Gras, A Vignaud, A Amadon… - Magnetic resonance …, 2017 - Wiley Online Library
Purpose A calibration‐free parallel transmission method is investigated to mitigate the
radiofrequency (RF) field inhomogeneity problem in brain imaging at 7 Tesla (T). Theory and …

Toward imaging the body at 10.5 tesla

MA Ertürk, X Wu, Y Eryaman… - Magnetic resonance …, 2017 - Wiley Online Library
Purpose To explore the potential of performing body imaging at 10.5 Tesla (T) compared
with 7.0 T through evaluating the transmit/receive performance of similarly configured dipole …

Fast online‐customized (FOCUS) parallel transmission pulses: a combination of universal pulses and individual optimization

J Herrler, P Liebig, R Gumbrecht… - Magnetic resonance …, 2021 - Wiley Online Library
Purpose To mitigate spatial flip angle (FA) variations under strict specific absorption rate
(SAR) constraints for ultra‐high field MRI using a combination of universal parallel transmit …

Specific absorption rate implications of within‐scan patient head motion for ultra‐high field MRI

E Kopanoglu, CM Deniz, MA Erturk… - Magnetic resonance in …, 2020 - Wiley Online Library
Purpose This study investigates the implications of all degrees of freedom of within‐scan
patient head motion on patient safety. Methods Electromagnetic simulations were performed …

SmartPulse, a machine learning approach for calibration‐free dynamic RF shimming: preliminary study in a clinical environment

R Tomi‐Tricot, V Gras, B Thirion… - Magnetic resonance …, 2019 - Wiley Online Library
Purpose A calibration‐free pulse design method is introduced to alleviate artifacts in clinical
routine with parallel transmission at high field, dealing with significant inter‐subject …

Progress in imaging the human torso at the ultrahigh fields of 7 and 10.5 T

K Uğurbil, PF Van de Moortele, A Grant… - Magnetic …, 2021 - mri.theclinics.com
The provenance of the recent but exploding interest in ultrahigh magnetic fields (UHF,
defined as 7 Tesla (T) and higher) can be traced back to efforts initiated in the mid-70s …

Actual patient position versus safety models: Specific Absorption Rate implications of initial head position for Ultrahigh Field Magnetic Resonance Imaging

E Kopanoglu - NMR in Biomedicine, 2023 - Wiley Online Library
Specific absorption rate (SAR) relates power absorption to tissue heating, and therefore is
used as a safety constraint in magnetic resonance imaging (MRI). This study investigates the …

A digital twin for parallel liquid-state nuclear magnetic resonance spectroscopy

M He, D Faderl, N MacKinnon, YT Cheng… - Communications …, 2024 - nature.com
One approach to increasing nuclear magnetic resonance measurement sample throughput
is to implement multiple, independent detection sites. However, the presence of radio …