Magnetic Resonance Materials in Physics, Biology and Medicine

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Low-level fat fraction quantification at 3 T: comparative study of different tools for water–fat reconstruction and MR spectroscopy
Magnetic Resonance Materials in Physics, Biology and Medicine - Tập 33 Số 4 - Trang 455-468 - 2020
R. Kořínek, Martin Gajdošík, Siegfried Trattnig, Zenon Starčuk, Martin Krššák
Pulsed gradient analysis using a dedicated magnetometer
Magnetic Resonance Materials in Physics, Biology and Medicine - Tập 5 - Trang 53-57 - 1997
P. Desgoutte, L. Chaabane, B. Favre, A. Deguin, C. Lapray, A. Briguet
In magnetic resonance imaging and spectroscopy, knowledge of the magnetic field gradient behavior is very important. This work describes a simple way to characterize the temporal and spatial dependence of the main magnetic field when a gradient is switched. Records are performed with a home-built magnetometer. This device is controlled by a personal computer for recording and processing the NMR si... hiện toàn bộ
Perfusion and diffusion imaging
Magnetic Resonance Materials in Physics, Biology and Medicine - Tập 2 - Trang 225-231 - 1994
J. V. Hajnal, I. R. Young
This article reviews the measurement of perfusion and diffusion and discusses the implications of the observed anisotropy of diffusion of water molecules in some tissues. An experiment is described which shows how observations of diffusion anisotropy can be used to obtain structural information for a model system and to estimate tissue propertiesin vivo. Differences between perfusion and diffusion... hiện toàn bộ
MR spectroscopy of transgenic mice
Magnetic Resonance Materials in Physics, Biology and Medicine - Tập 6 - Trang 109-110 - 1998
Matthias Spindler, Kurt W. Saupe, Joanne S. Ingwall
High-resolution imaging of the excised porcine heart at a whole-body 7 T MRI system using an 8Tx/16Rx pTx coil
Magnetic Resonance Materials in Physics, Biology and Medicine - Tập 36 Số 2 - Trang 279-293
Maxim Terekhov, Ibrahim A. Elabyad, David Lohr, Ulrich Hofmann, Laura M. Schreiber
Abstract Introduction MRI of excised hearts at ultra-high field strengths ($${\mathrm{B}}_{0}$$ B 0 ≥7 T) can provide high-resolution, high-fidelity ground truth data for biomedical studies, imaging science, and artificial intelligence. In this study, we demonstrate the capabilities of a custom-built, multiple-element transceiver array customized for high-resolution imaging of excised hearts. Meth... hiện toàn bộ
3D TOF MRA: role in evaluation of intracranial aneurysms following embolization with platinum coils
Magnetic Resonance Materials in Physics, Biology and Medicine - Tập 2 - Trang 327-334 - 1994
D. J. Wilcock, T. Jaspan, S. Evans
Several patients with intracranial aneurysms at our hospital have recently been treated with embolization of the aneurysm itself with detachable platinum coils. This has been done as part of a multicenter trial of GDC platinum coils. We report our experience in the follow-up of these patients with magnetic resonance (MR) after the embolization procedure. We present several illustrative cases and d... hiện toàn bộ
Correction of parallel transmission using concurrent RF and gradient field monitoring
Magnetic Resonance Materials in Physics, Biology and Medicine - Tập 30 - Trang 473-488 - 2017
Mustafa Çavuşoğlu, Benjamin Emanuel Dietrich, David Otto Brunner, Markus Weiger, Klaas Paul Pruessmann
The accuracy and precision of the parallel RF excitations are highly dependent on the spatial and temporal fidelity of the magnetic fields involved in spin excitation. The consistency between the nominal and effective fields is typically limited by the imperfections of the employed hardware existing both in the gradient system and the RF chain. In this work, we experimentally presented highly impr... hiện toàn bộ
Correction to: Report on the hot topic debate at ESMRMB 2021
Magnetic Resonance Materials in Physics, Biology and Medicine - Tập 35 - Trang 343-343 - 2021
Najat Salameh, David G. Norris, Andrew Webb
Experimental31p nmr study of the influence of ionic strength on the apparent dissociation constant of mgatp
Magnetic Resonance Materials in Physics, Biology and Medicine - Tập 2 - Trang 101-107 - 1994
I. Mottet, R. Demeure, B. Gallez, C. Grandin, B. E. Van Beers, J. Pringot
The classical method for31P NMR determination of intracellular free magnesium concentration ([Mg free 2+ ]) requires an accurate knowledge of the apparent dissociation constant (K D ) of MgATP. There is a large difference between the previously determined values ofK D . Although the value of 50 µM, determined by a31P NMR method, is now largely accepted, a value of 86 µM has more recently been meas... hiện toàn bộ
Effects of air susceptibility on proton resonance frequency MR thermometry
Magnetic Resonance Materials in Physics, Biology and Medicine - Tập 25 - Trang 41-47 - 2011
Markus N. Streicher, Andreas Schäfer, Enrico Reimer, Bibek Dhital, Robert Trampel, Dimo Ivanov, Robert Turner
The temperature dependence of the proton resonance frequency (PRF) is often used in MR thermometry. However, this method is prone to even very small changes in local magnetic field strength. Here, we report on the effects of susceptibility changes of surrounding air on the magnetic field inside an object and their inferred effect on the measured MR temperature. MR phase thermometry was performed o... hiện toàn bộ
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