Results 51 to 60 of about 1,259,174 (207)

Quantitative Diffusion and T2 Mapping Using RF‐Modulated Phase‐Based Gradient Echo Imaging

Magnetic Resonance in Medicine, Volume 96, Issue 1, Page 49-65, July 2026.
ABSTRACT Purpose To introduce and evaluate the feasibility of a novel RF‐phase modulated gradient echo (GRE) method for quantitative diffusion MRI, aimed at mitigating geometric distortion and enabling high‐resolution 3D quantitative diffusion/T2 mapping as a complementary alternative to conventional DWI.
Daiki Tamada, Ali Pirasteh, David F. Jarrard, Diego Hernando, Scott B. Reeder   +4 more
wiley   +1 more source

Upconverting Nanoparticles for Bimodal Luminescence and Magnetic Resonance Imaging of Langerhans Islets

Small Science, Volume 6, Issue 7, July 2026.
Monodisperse dumbbell‐shaped core–shell upconversion nanoparticles (CS‐UCNPs) codoped with Fe, Yb, Er ions and coated with NaGdF4:Nd, Yb, Tb shell provide efficient T1/T2*‐weighted magnetic resonance imaging (MRI) contrast and bright red emission under near‐infrared excitation. Colloidally stable poly(methyl vinyl ether‐alt‐maleic acid) (PMVEMA)‐coated
Oleksandr Shapoval, Daniel Jirák, Zuzana Berková, Miroslav Šlouf, Olga Kočková, Hana Engstová, Aminadav Halili, David Červený, Petr Ježek, Daniel Horák   +9 more
wiley   +1 more source

Reverse-Link Performance of Synchronous DS-CDMA Systems in Dispersive Rician Multipath Fading Channels

, 2003
The reverse-link performance of synchronous DS-CDMA is investigated in Rician multipath fading environments. The numerical results show that the performance benefits of synchronous transmission depend on the specular path’s power as well as on the ...
Hwang, S.H., Hanzo, L.
core   +1 more source

Static Output Feedback Control for Fuzzy Systems With Stochastic Fading Channel and Actuator Faults

IEEE Access, 2020
This work focuses on the issue of static output feedback control for Takagi-Sugeno (T-S) fuzzy systems in the discrete-time domain. Both the fading channel and actuator faults are determined by a set of stochastic variables.
Yonghong Chen, Qingfei Gao, Jun Cheng, Kaibo Shi, Wenhai Qi   +4 more
doaj   +1 more source

Towards Clinical Translation of Intravoxel Incoherent Motion MRI: Acquisition and Analysis Consensus Recommendations

Journal of Magnetic Resonance Imaging, Volume 63, Issue 6, Page 1782-1801, June 2026.
ABSTRACT Intravoxel incoherent motion (IVIM) MRI allows for simultaneous assessment of tissue microcirculation (perfusion) and diffusion of water. In single‐center studies, IVIM has shown great potential for diagnosis, treatment outcome prediction, and treatment monitoring for many different diseases and organs.
Eric E. Sigmund, Susanne S. Rauh, Mami Iima, Christian Federau, Diego Hernando, Oscar Jalnefjord, Jacobus F. A. Jansen, Jonas Jasse, Neil Peter Jerome, Misha P. T. Kaandorp, Sila Kurugol, Frederik B. Laun, Mira M. Liu, Alexandra Ljimani, Thoralf Niendorf, David A. Reiter, Mohammed Salman Shazeeb, Amita Shukla‐Dave, Julia Stabinska, Andreas Wetscherek, Peter T. While, Dan Wu, Denis Le Bihan, Oliver J. Gurney‐Champion   +23 more
wiley   +1 more source

Analysis of Optimal Combining in Rician Fading With Co-Channel Interference [PDF]

IEEE Transactions on Vehicular Technology, 2019
Approximate Symbol error rate (SER), outage probability and rate expressions are derived for receive diversity system employing optimum combining when both the desired and the interfering signals are subjected to Rician fading, for the cases of a) equal power uncorrelated interferers b) unequal power interferers c) interferer correlation.
Muralikrishnan Srinivasan, Sheetal Kalyani   +1 more
openaire   +2 more sources

Downlink Transmission of Multicell Distributed Massive MIMO With Pilot Contamination Under Rician Fading

IEEE Access, 2020
In this paper, we investigate the spectral efficiency (SE) of a multicell downlink (DL) distributed massive MIMO (DM-MIMO) system with pilot contamination operating over Rician fading channels in which each remote access unit (RAU) is equipped with a ...
Meng Wang, Dian-Wu Yue, Si-Nian Jin
doaj   +1 more source

Performance analysis of M‐ary OQAM/FBMC with impact of nonlinear distortion over compound Rician K‐factor unshadowed/κ−μ shadowed fad ing channels

IET Communications, 2021
In this paper, the bit error rate (BER) analyses of M‐ary offset QAM for filter bank‐based multicarrier (M‐ary OQAM/FBMC) contaminated by nonlinear distortion (NLD) are investigated over different channel scenarios, such as unshadowed line‐of‐sight (LOS)
Ghanim A. Al‐Rubaye
doaj   +1 more source

Modeling the Intermediate Flow Regime in Flow‐Compensated Intravoxel Incoherent Motion MRI

Magnetic Resonance in Medicine, Volume 95, Issue 6, Page 3476-3487, June 2026.
ABSTRACT Purpose The intravoxel incoherent motion (IVIM) model is commonly used to separate the effects of motion related to diffusion and blood microcirculation (perfusion) on the MR signal. Depending on the encoding time (T), it is possible to probe the different temporal regimes of blood motion, which resemble a ballistic flow at short T and a ...
Louise Rosenqvist, Mikael Montelius, Isabella M. Björkman‐Burtscher, Elina Petersson, Maria Ljungberg, Oscar Jalnefjord   +5 more
wiley   +1 more source

PERFORMANCE OF TURBO CODED SIGNALS OVER FADING CHANNELS

Electrica, 2019
In this paper, the performance of turbo coded signals are investigated for different frame numbers and encoder structures over Rician fading channels. The numerical results demonstrate the error performance degradation due to fading channel frame numbers
Oguz BAYAT, Hissam ALNAJJAR, Osman N. UCAN, Onur OSMAN   +3 more
doaj   +2 more sources