Results 231 to 240 of about 22,412 (268)

Linearity, Bias, Intrascanner Repeatability, and Interscanner Reproducibility of Quantitative Multidynamic Multiecho Sequence for Rapid Simultaneous Relaxometry at 3 T: A Validation Study With a Standardized Phantom and Healthy Controls

Investigative Radiology, 2019
Objectives The aim of this study was to evaluate the linearity, bias, intrascanner repeatability, and interscanner reproducibility of quantitative values derived from a multidynamic multiecho (MDME) sequence for rapid simultaneous relaxometry.
A. Hagiwara, M. Hori, J. Cohen-Adad, M. Nakazawa, Yuichi Suzuki, A. Kasahara, Moeko Horita, T. Haruyama, C. Andica, Tomoko Maekawa, K. Kamagata, K. Kumamaru, O. Abe, S. Aoki   +13 more
semanticscholar   +1 more source

Relaxometry and Contrast Agents

2018
The perturbation on the relaxation of solvent water protons induced by the presence of paramagnetic metal-containing systems has been exploited for the design of contrast agents in magnetic resonance imaging applications. Complexes of Gd3+ ions were identified early as the candidates of choice and several, highly stable, Gd-containing contrast agents ...
Aime S, Gianolio E, Viale A
openaire   +2 more sources

Muskelrelaxanzien und Relaxometrie

2017
Seit ihrer Einfuhrung in die klinische Praxis in den 1940er Jahren haben Muskelrelaxanzien einen festen Platz im Rahmen sog. balancierter Anasthesiekonzepte. Durch die pharmakologische Muskelerschlaffung werden chirurgische Eingriffe wesentlich erleichtert oder erst moglich gemacht.
Jan-Uwe Schreiber, Thomas Fuchs-Buder
openaire   +1 more source

NMR Relaxometry: The Canonical Case Glycerol

The Journal of Physical Chemistry B, 2020
We present a quantitative description of the proton spin-lattice relaxation rate R1(T,ω) of glycerol including temperatures from 191 to 360 K and a frequency range 10 kHz < ω/2π < 20 MHz covered by the field-cycling technique. The analysis encompasses the data compiled by Noack and co-workers in 1971, so far, the most complete data set (10 kHz > ω/2π <
M. Flämig, M. Hofmann, N. Fatkullin, E. A. Rössler   +3 more
openaire   +2 more sources

Relaxometry of Tissue

2007
The sections in this article are 1 Introduction 2 Proton 1/T1 NMRD Profiles of Tissue and Model Systems 3 Proton and Deuteron NMRD Profiles in Model Systems with Deuterated Solvent 4 Theory 5 Data and Theory 6 Cytoplasmic Ordering and Cytoplasmic Chaos 7 Perspectives 8 Biographical Sketches Related ...
Seymour H. Koenig, Rodney D. Brown
openaire   +1 more source

Investigation of Synthetic Relaxometry and Diffusion Measures in the Differentiation of Benign and Malignant Breast Lesions as Compared to BI‐RADS

Journal of Magnetic Resonance Imaging, 2020
Breast cancer is the most common malignant tumor in women and a quantitative contrast‐free method is highly desirable for its diagnosis.
Weibo Gao, Shuqun Zhang, Jinxia Guo, Xiaocheng Wei, Xiaohui Li, Y. Diao, Wei Huang, Yue Yao, Ali Shang, Yanyan Zhang, Quanxin Yang, Xin Chen   +11 more
semanticscholar   +1 more source

Quantitative Two‐Dimensional time Correlation Relaxometry

Magnetic Resonance in Medicine, 1991
AbstractAn experimental and analytical method is presented for obtaining two‐dimensional NMR time correlation spectra of T1 and (T2 and T2) exponential relaxation in heterogeneous samples. The numerical algorithms used in this study do not bias the solution by any a priori assumptions as to the number of required components.
A E, English, K P, Whittall, M L, Joy, R M, Henkelman   +3 more
openaire   +2 more sources

Transverse relaxometry with stimulated echo compensation

Magnetic Resonance in Medicine, 2010
AbstractPresented is a fitting model for transverse relaxometry data acquired with the multiple‐refocused spin‐echo sequence. The proposed model, requiring no additional data input or pulse sequence modifications, compensates for imperfections in the transmit field and radiofrequency (RF) profiles.
R Marc, Lebel, Alan H, Wilman
openaire   +2 more sources

Spatially resolved multidimensional cross-correlation relaxometry

Magnetic Resonance Imaging, 2010
Novel protocols are presented for acquiring one- and two-dimensional relaxation time spectra from selected subvolumes of a macroscopically heterogeneous sample. Although the protocols are generally applicable, special emphasis is given to their implementation on low-cost, low-field bench-top relaxometers lacking pulse shaping or pulsed gradient ...
Luca, Venturi, Brian, Hills
openaire   +2 more sources

Magnetic resonance relaxometry in Parkinson's disease

Neurological Sciences, 2002
A central role of iron in the pathogenesis of idiopathic Parkinson's disease (PD), due to its increase in substantia nigra pars compacta dopaminergic neurons and its capacity to enhance production of toxin reactive oxygen radicals, has been discussed for many years.
F, Mondino, P, Filippi, U, Magliola, S, Duca   +3 more
openaire   +2 more sources