Results 161 to 170 of about 67,740 (222)

Time‐Division Multiplexing for Parallel Transmission at Ultra‐High Field With Limited RF Channels

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Investigating time‐division multiplexing for parallel transmission in ultra high‐field imaging, striving for homogeneous whole brain excitation with a limited number of RF channels. Methods A fast RF switch was built to alternately route 8 transmit channels to each row of a double‐row 16‐element transmit coil array at a 9.4 T human MRI
Felix Glang, Georgiy A. Solomakha, Dario Bosch, Klaus Scheffler, Nikolai I. Avdievich   +4 more
wiley   +1 more source

Finite element analysis of materially uniform dielectric elastomers. [PDF]

Math Mech Solids
Alhasadi MF, Bayram A, Sun Q, Federico S.   +3 more
europepmc   +1 more source

Pole‐To‐Pole 3D Radial Trajectory Designs Improve Image Quality and Quantitative Parametric Mapping in the Brain and Heart

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To design 3D radial spiral phyllotaxis trajectories aimed at removing phase inconsistencies, improving image quality, and enhancing parametric mapping accuracy by acquiring nearly opposing spokes starting from both hemispheres in 3D radial k‐space. Methods Two 3D radial trajectories, pole‐to‐pole and continuous spiral phyllotaxis, were
Eva S. Peper, Grzegorz Bauman, Matteo Tagliabue, Berk C. Açikgöz, Nils M. J. Plähn, Adèle L. C. Mackowiak, Yasaman Safarkhanlo, Joseph G. Woods, Davide Piccini, Li Feng, Christopher W. Roy, Oliver Bieri, Jessica A. M. Bastiaansen   +12 more
wiley   +1 more source

Modified energy-based GAN for intensity in homogeneity correction in brain MR images. [PDF]

Sci Rep
Karuna Y, Syamala N, Ravikumar CV, Thakur P, Saladi S.   +4 more
europepmc   +1 more source

Rapid Free‐Breathing and Automated 2D Shimming of the Lung at 3T

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To develop and validate a rapid, fully automated method for shimming of the lung. Methods For field mapping of the lung, a custom 2D RF spoiled gradient echo sequence was used offering sub‐millisecond echo times. At 3T, four echo‐shifted coronal images were acquired with a minimum TE of 0.57 ms and an inter‐echo spacing of 0.1 ms ...
Pavlos Panos, Grzegorz Bauman, Oliver Bieri   +2 more
wiley   +1 more source

Comparative analysis of sLASER and PRESS techniques for magnetic resonance spectroscopy of the normal human brain. [PDF]

Sci Rep
Kim SK, Oh YA, Bae YJ, Cho SJ, Baik SH, Sunwoo L, Choi BS, Kim JH.   +7 more
europepmc   +1 more source

Comparison of Signal‐ and Volume‐Based Ventilation‐Weighted Assessment Using 3D FLORET UTE MRI in Patients With Various Pulmonary Disease

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose 3D free‐breathing, proton, contrast‐agent‐free MR methods are increasingly used for pulmonary ventilation‐weighted measurements. The methods are split between: (1) signal‐based, which rely on lung parenchyma signal changes during respiration, and (2) volume‐based that utilize the Jacobian determinant of deformation fields from the ...
Filip Klimeš, Joseph W. Plummer, Andreas Voskrebenzev, Marcel Gutberlet, Marius M. Klein, Matthew M. Willmering, Alexander M. Matheson, Abdullah S. Bdaiwi, Frank Wacker, Jason C. Woods, Zackary I. Cleveland, Laura L. Walkup, Jens Vogel‐Claussen   +12 more
wiley   +1 more source

Milli-Tesla quantization enabled by tuneable Coulomb screening in large-angle twisted graphene. [PDF]

Nat Commun
Babich I, Reznikov I, Begichev I, Kazantsev AE, Slizovskiy S, Baranov D, Šiškins M, Zhan Z, Pantaleon PA, Trushin M, Zhao J, Grebenchuk S, Novoselov KS, Watanabe K, Taniguchi T, Fal'ko VI, Principi A, Berdyugin AI.   +17 more
europepmc   +1 more source

Coaxial Dipole Array With Switching Transmit Sensitivities for Ultrahigh Field MRI

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To investigate dipole antennas with electronically switchable transmit field patterns to improve flip angle homogeneity in ultra‐high field MRI. Methods Reconfigurable dipole elements that could produce two distinct electronically switchable B1+$$ {B}_1^{+} $$ field profiles were conceptualized and constructed. Eight such elements were
Dario Bosch, Georgiy A. Solomakha, Felix Glang, Martin Freudensprung, Nikolai Avdievich, Klaus Scheffler   +5 more
wiley   +1 more source

High-resolution deuterium metabolic imaging of the human brain at 9.4 T using phase-cycled balanced SSFP spectral-spatial acquisitions. [PDF]

Magn Reson Med
Iyyappan Valsala P, Pohmann R, Heule R, Solomakha GA, Avdievich NI, Engelmann J, Kuebler L, Martins AF, Scheffler K.   +8 more
europepmc   +1 more source