Results 111 to 120 of about 22,412 (268)

Field Strength‐Dependent White Matter R1 and R2 Anisotropy of Phase‐Cycled Balanced Steady‐State Free Precession Relaxometry

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To investigate how the relaxation rates (R1, R2) and asymmetry indices (AI), derived from phase‐cycled balanced steady‐state free precession (pc‐bSSFP) data, depend on the orientation of white matter (WM) fiber tracts at different field strengths.
Florian Birk, Hamzeh Tesh, Ali Aghaeifar, Svenja Klinkowski, Praveen Iyyappan Valsala, Sebastian Mueller, Svenja Brodt, Klaus Scheffler, Rahel Heule   +8 more
wiley   +1 more source

Magnetic Resonance imaging (MRI) in detection of _Bifidobacterium longum_ and _Clostridium novyi-NT_ labeled with superparamagnetic iron oxide (SPIO) nanoparticle [PDF]

, 2009
*Purpose:* To investigate the MR imaging of _Bifidobacterium longum_ and _Clostridium novyi-NT_ labeling with superparamagnetic iron oxide (SPIO) nanoparticles. *Materials and methods:* Tubes containing _B. longum_-SPIO, Free-SPIO, _B.
Dan Li, Dayong Zhou, Jianhua Wang, Qingguo Wang, Xuebin Zhang   +4 more
core   +1 more source

Analytic treatment of nuclear spin-lattice relaxation for diffusion in a cone model

, 2011
We consider nuclear spin-lattice relaxation rate resulted from a diffusion equation for rotational wobbling in a cone. We show that the widespread point of view that there are no analytical expressions for correlation functions for wobbling in a cone ...
A.E. Sitnitsky, Abragam, Aksenov, Bateman, Bauer, Buevich, Buevich, Calandrini, Calandrini, Cowan, Giraud, Goddard, Goddard, Goddard, Halle, Halle, Jarymowycz, Jeffreys, Kimmich, Kimmich, Kimmich, Kimmich, Kimmich, Klemm, Klemm, Kneller, Kneller, Kneller, Korb, Korb, Korb, Korb, Korb, Korb, Landau, León, Lipari, Lipari, Lipari, Lipari, Magin, Magin, Martinez, Meirovitch, Modig, Nusser, Prudnikov, Richarz, Sitnitsky, Solomon, Stapf, Stapf, Sullivan, Sunde, Vogel, Wang, Zavada, Zavada   +57 more
core   +1 more source

Quantitative Comparison of Multi‐Echo Spin Echo and Multi‐Echo Gradient Echo Myelin Water Imaging in a Panel of Mbp Enhancer‐Edited Mouse Lines

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To evaluate the correspondence between myelin water fraction (MWF) estimates derived from multi‐echo spin echo (MESE) and multi‐echo gradient echo (MGRE) imaging in fixed mouse brain tissue, using a panel of myelin basic protein (Mbp) enhancer‐edited mouse lines exhibiting graded hypomyelination.
Vladimir Grouza, Yawen Shi, Sean Goldfarb, Klaudia M. Bednarz, Isabella Gomez, Marius Tuznik, Zhe Wu, Hooman Bagheri, Katherine A. Siminovitch, Alan C. Peterson, Thomas Stroh, David A. Rudko   +11 more
wiley   +1 more source

Rapid Field-Cycling MRI using Fast Spin-Echo [PDF]

, 2013
The author acknowledges funding from the EPSRC through the Centre for Doctoral Training in Integrated Magnetic Resonance.Non peer reviewedPublisher ...
Broche, Lionel, Lurie, David John, Ross, P. James   +2 more
core  

Assessment of Optimal T1/T2‐Weighted Combinations for Myelin Sensitivity: Effects of Echo Time and Exponents

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose The aim of this study is to improve the traditional T1‐weighted (T1w) over T2‐weighted (T2w) ratio as a proxy for myelin by investigating the optimal T2w TE and combination of exponent‐weighted T1w and T2w images (T1wx1/T2wx2$$ \mathrm{T}1{\mathrm{w}}^{x_1}/\mathrm{T}2{\mathrm{w}}^{x_2} $$).
Simone Monachino, Gerhard S. Drenthen, Lis J. M. van den Boogaard, Marcel Breeuwer, Catarina Dinis Fernandes, Oliver H. H. Gerlach, Svitlana Zinger, Jacobus F. A. Jansen   +7 more
wiley   +1 more source

Simultaneous Volumetric T1 and T2 Mapping With Blood‐ and Fat‐Suppression in Abdominal Aortic Aneurysms

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To develop and validate a protocol for simultaneous volumetric T1 and T2 mapping with blood‐ and fat‐suppression, and apply it to patients with abdominal aortic aneurysms (AAA) to assess tissue characteristics. Methods A spoiled gradient echo (SPGR) variable flip angle (VFA) acquisition was modified with preparation modules to suppress
Wilhelm Stehling, Myrte Wennen, Eva Aalbregt, Eric Schrauben, Pim van Ooij, Kak Khee Yeung, Aart J. Nederveen, Oliver J. Gurney‐Champion   +7 more
wiley   +1 more source

Editorial: Neurology and neuroimaging in exotic and non-domestic species

Frontiers in Veterinary Science, 2022
Silke Hecht, William B. Thomas, Michael Pees   +2 more
doaj   +1 more source

Ligand‐Driven Optimization of Iron Oxide Nanoprobes for In Vivo MRI Enhancement at Ultra‐High Field

Small, EarlyView.
Ligand‐tailored iron oxide nanoparticles reveal how surface chemistry controls T2 relaxivity and in vivo performance in ultra‐high‐field MRI. Systematic variation of hydrophilicity and charge across five coatings modulated r2 by up to 333 mm−1 s−1, with chemical properties, rather than shell thickness, dictating magnetic dephasing and enabling reliable
Pelayo García‐Acevedo, María Luz Alonso‐Alonso, Sara Ortega‐Espina, Manuel Bañobre‐López, Yolanda Piñeiro, Ramón Iglesias‐Rey, José Rivas   +6 more
wiley   +1 more source

Fitting Quality of NMR Relaxation Data to Differentiate Asphalt Binders

Physchem
Asphalt binder performance grades (PGs) are important metrics in designing pavements for effective transportation infrastructure. The PG system relies on the binder’s stiffness and is determined through energy- and time-intensive physical testing ...
Rebecca M. Herndon, Kevin Lai, Magdy Abdelrahman, Klaus Woelk   +3 more
doaj   +1 more source