Results 131 to 140 of about 22,412 (268)

Voxel-based relaxometry: a new approach for analysis of T2 relaxometry changes in epilepsy

NeuroImage, 2004
The measurement of the T2 relaxation time (T2 relaxometry) had been established as a reliable tool for the assessment of certain conditions such as temporal lobe epilepsy. The standard procedure for analysis of T2 data uses manually drawn regions of interest (ROIs).
Gaby S, Pell, Regula S, Briellmann, Anthony B, Waites, David F, Abbott, Graeme D, Jackson   +4 more
openaire   +2 more sources

NMR Characterization of Graphene Oxide-Doped Carbon Aerogel in a Liquid Environment

Gels
In this study, we report the findings of a morphological analysis of a resorcinol–formaldehyde (RF)-based carbon aerogel (CA) and its graphene oxide (GO)-doped version (CA-GO), prepared for possible applications as an electrode material.
Dávid Nyul, Mónika Kéri, Levente Novák, Hanna Szabó, Attila Csík, István Bányai   +5 more
doaj   +1 more source

High‐resolution deuterium metabolic imaging of the human brain at 9.4 T using phase‐cycled balanced SSFP spectral–spatial acquisitions

Magnetic Resonance in Medicine, Volume 95, Issue 3, Page 1304-1322, March 2026.
Abstract Purpose The aim was to improve the sensitivity and robustness against B0 inhomogeneities of deuterium metabolic imaging (DMI) using phase‐cycled balanced SSFP (bSSFP) methods at 9.4 T. Methods We investigated two variants of phase‐cycled bSSFP acquisitions, namely uniformly weighted multi‐echo and acquisition‐weighted chemical shift imaging ...
Praveen Iyyappan Valsala, Rolf Pohmann, Rahel Heule, Georgiy A. Solomakha, Nikolai I. Avdievich, Jörn Engelmann, Laura Kuebler, André F. Martins, Klaus Scheffler   +8 more
wiley   +1 more source

Optimized Quantification of Spin Relaxation Times in the Hybrid State

, 2018
Purpose: The analysis of optimized spin ensemble trajectories for relaxometry in the hybrid state. Methods: First, we constructed visual representations to elucidate the differential equation that governs spin dynamics in hybrid state.
Assländer, Jakob, Cloos, Martijn A, Lattanzi, Riccardo, Sodickson, Daniel K   +3 more
core   +1 more source

Pharmacokinetic modeling strategies for dynamic hyperpolarized urea imaging

Magnetic Resonance in Medicine, Volume 95, Issue 3, Page 1671-1683, March 2026.
Abstract Purpose To evaluate pharmacokinetic modeling methods for quantification of tissue perfusion/permeability with hyperpolarized 13C urea. Methods Three models for quantitative analysis of dynamic HP urea imaging data were proposed and evaluated in numerical simulations and a thyroid cancer mouse model.
Keith A. Michel, Collin J. Harlan, Christopher M. Walker, Matthew E. Merritt, Yunyun Chen, Stephen Y. Lai, James A. Bankson   +6 more
wiley   +1 more source

Proton relaxometry of tree leaves at hypogeomagnetic fields

Frontiers in Plant Science
We report on a cross-species proton-relaxometry study in ex vivo tree leaves using nuclear magnetic resonance (NMR) at 7µT. Apart from the intrinsic interest of probing nuclear-spin relaxation in biological tissues at magnetic fields below Earth field ...
Anne M. Fabricant, Anne M. Fabricant, Piotr Put, Danila A. Barskiy, Danila A. Barskiy   +4 more
doaj   +1 more source

Recipe for Hydrogels With Tunable Relaxation and Diffusion Properties for Use as MRI Test Materials

Magnetic Resonance in Medicine, Volume 95, Issue 3, Page 1823-1832, March 2026.
ABSTRACT Purpose To develop and evaluate a preparation protocol (recipe) for hydrogels with specific relaxation times and ADC values to be used as tissue‐like test materials for MRI experiments at 3 Tesla. Methods Gd‐DTPA, agarose, and soy lecithin were used as modulators for T1, T2, and ADC.
V. Fritz, F. Schick
wiley   +1 more source

Physical Stability and Molecular Mobility of Resveratrol in a Polyvinylpyrrolidone Matrix

Molecules
The physical stability, molecular mobility, and appearance of nanocrystalline resveratrol in a polyvinylpyrrolidone (PVP) matrix were investigated. Two formulations with resveratrol loadings of 30% and 50% were prepared and characterized using powder X ...
Aleksandra Pajzderska, Miguel Angel González, Marcin Jarek, Jadwiga Mielcarek, Jan Wąsicki   +4 more
doaj   +1 more source

Observation of an incoherent thermally activated proton hopping process in calix-[4]-arene by means of anelastic spectroscopy

, 2002
The anelastic spectrum of calix[4]arene was measured at two different vibrational frequencies. Three thermally activated peaks were detected. The lowest temperature peak can be described considering a continous distribution function of activation ...
Arduini, A., Caciuffo, R., Cantelli, R., Paolone, A.   +3 more
core   +1 more source

Ticept: Wideband Electrical Properties Tomography by Tissue Composition Assessment With Quantitative  1$$ {}^1 $$H 23$$ {}^{23} $$Na 39$$ {}^{39} $$K Multinuclear MRI

Magnetic Resonance in Medicine, Volume 95, Issue 3, Page 1503-1512, March 2026.
ABSTRACT Purpose To develop a noninvasive method for estimating dielectric properties over a wide frequency range from 50 to 600 MHz. Existing methods are limited in accuracy and provide single‐frequency results. Furthermore, accurate knowledge of dielectric properties becomes more important, since medical device design and safety evaluation ...
Laura J. C. Barendsz, Kemal Sumser, Teresa Gerhalter, Rob M. C. Mestrom, Armin M. Nagel, Margarethus M. Paulides   +5 more
wiley   +1 more source