Results 161 to 170 of about 60,244 (309)

SNR‐Efficient Inhomogeneous Magnetization Transfer (ihMT) for Clinical Applications at 7 T

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Inhomogeneous MT (ihMT) is an MRI modality sensitive to Myelin, the lipid‐rich membrane surrounding the axons. A novel ihMT saturation strategy and its associated B1+$$ {\mathrm{B}}_1^{+} $$ correction at UHF are proposed. The aim is to generate a strong ihMT effect within a clinically compatible scan time while complying with SAR ...
Timothy Anderson, Niklas Wallstein, Lucas Soustelle, Thomas Troalen, Gopal Varma, David C. Alsop, Maxime Guye, Guillaume Duhamel, Olivier M. Girard   +8 more
wiley   +1 more source

Hemodynamic Modeling and Phase‐Adjustable Reconstruction of Hyperpolarized Cardiac 13C MRS Using 1H Cine and ECG Timing

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To deconvolve cardiac phase and hemodynamic effects in hyperpolarized (HP) [1‐13C]pyruvate and to develop a cardiac phase‐adjustable reconstruction framework. Methods Cardiac phase drift during dynamic acquisition of HP 13C MRS and its effect on dynamic signal fidelity were simulated using a digital cardiac phantom. A hemodynamic model
Sung‐Han Lin, Corey Mozingo, Crystal E. Harrison, Kelley A. Derner, Craig R. Malloy, Jae Mo Park   +5 more
wiley   +1 more source

Simultaneous Assessment of Skeletal Muscle Energetics and Blood Flow During Dynamic Exercise by Interleaved ³¹P-MRS/¹H-MRI. [PDF]

Magn Reson Med
Samuel TJ, Ganji SK, Goldenberg JR, Lewsey SC, Hays AG, Weiss RG, Schär M.   +6 more
europepmc   +1 more source

Ultrafast fMRI Detects Age‐Related Changes in Harmonics of Cardiac Pulsations in the Brain at 7 T

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Aging impacts pulsatility of blood vessels in the brain, reflecting vascular health. Resolving characteristics of cardiac pulsatility requires faster acquisitions than traditional fMRI. An ultrafast fMRI method was developed and applied to sample several harmonics of cardiac pulsations at 7 T.
Charles Marchini, Dema Abdelkarim, Yuhui Chai, Monica Fabiani, Gabriele Gratton, Bradley P. Sutton   +5 more
wiley   +1 more source

Signal-Dependent Planning Noise Reduces Task Interference by Assisting in the Formation of Stable Motor Primitives in a Neural Network Model of Muscle Coordination Learning. [PDF]

Neural Comput
Feng DW, Reinkensmeyer DJ, Perez-Ibarra JC.   +2 more
europepmc   +1 more source

Interleaving Time and Structure.

Comput. Artif. Intell., 1998
A model for knowledge representation that incorporates structure and time is presented. The model is the domain of structured histories, which is based on the interleaving of these features in a nested, structured manner. A rich temporal representation language is provided.
openaire   +1 more source

Transverse Relaxation Time Constant of Cystathionine in Human Glioma at 3 T

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Cystathionine (Cth) has emerged as a promising biomarker for identifying 1p/19q codeleted gliomas. However, little is known about the T2 relaxation time constant of Cth in gliomas. The aim of this study was to measure the T2 of Cth in vivo in glioma and compare it to the T2s of other metabolites at 3 T.
Dinesh K. Deelchand, Francesca Branzoli, Jamie D. Walls, Lucia Nichelli, Marc Sanson, Bertrand Mathon, Małgorzata Marjańska   +6 more
wiley   +1 more source

Sparsity and memory constraints interact with training sequence to bias learning of associative maps. [PDF]

Neuropsychologia
Noh SM, Zhou D, Cooper KW, Guo S, Dinh ET, Bornstein AM.   +5 more
europepmc   +1 more source

Single‐Shot 2D Radial Echo Planar Imaging for Functional MRI

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To develop a novel single‐shot radial echo planar imaging (ss‐rEPI) technique for rapid, distortion‐free brain imaging in functional MRI experiments. Methods Radial multi‐gradient echo (radial mGRE) data were acquired on a 3T clinical scanner using a 2D ss‐rEPI readout with small golden‐angle rotations between echoes.
Christoph A. Rettenmeier, Zidan Yu, Krystalyn Edwards‐Calma, Kai Tobias Block, V. Andrew Stenger   +4 more
wiley   +1 more source

Bicomponent Mapping of Cortical Bone Using a New Interleaved UTE Imaging Sequence. [PDF]

Magn Reson Med
Shin SH, Athertya JS, Suprana A, Lo J, Wang J, Moazamian D, Chapelin F, Ma Y.   +7 more
europepmc   +1 more source