Results 171 to 180 of about 1,869 (251)

Integrated approach for edge coverage enhancement based on IRS phase shift control and AP selection in dense user communication system. [PDF]

Sci Rep
Shrivastava S, Taneja A, Alqahtani N, Alqahtani A.   +3 more
europepmc   +1 more source

Suppression of Oscillation and Ghosting in RF‐Spoiled Gradient‐Echo‐Based Dynamic Imaging

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose This study aims to address the suppression of oscillation and ghosting appearing in RF‐spoiled gradient‐echo‐based dynamic imaging, which is caused by the pseudo‐steady state (PSS) of magnetization. Theory and Methods We extended the concept of the previous RF phase‐cycle‐adapted averaging method to RF‐spoiled gradient‐echo‐based cine (
Jae‐Youn Keum, Jang‐Yeon Park
wiley   +1 more source

Short-Packet Communications in Multi-Antenna Cooperative NOMA Networks with Hardware Impairments. [PDF]

Sensors (Basel)
Zhang X, Chen D, Hu J, Sun X, Wang B, Zhang D.   +5 more
europepmc   +1 more source

Fast Localized Calibration for Spatial‐Spectral Excitation Without Fly‐Back Gradients

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Standard spatial‐spectral excitation pulses apply a fly‐back gradient between sub‐pulses, limiting, for example, how thin the slices can be (> 4 mm). Without fly‐back gradients, slices can be as thin as 1.7 mm but require a phase calibration for the sub‐pulses with inverted gradients due to system imperfections.
Michael Schär, Sandeep K. Ganji, Robert G. Weiss, Allison G. Hays   +3 more
wiley   +1 more source

Magic cancellation point for vibration resilient ultrastable microwave signal synthesis. [PDF]

Nat Commun
Loh W, Gray D, Maxson R, Kharas D, Plant J, Juodawlkis PW, Sorace-Agaskar C, Yegnanarayanan S.   +7 more
europepmc   +1 more source

Comparison of Amplitude‐ and Amplitude‐Frequency‐Modulated Pulses for Outer Volume Suppression in Cardiac MRI: Application to Myocardial T2$$ {T}_2 $$ Mapping

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To evaluate single‐ and dual‐band pulse modules for suppressing extra‐cardiac signal in cardiac MRI, and test their applicability for time‐efficient imaging with reduced FOV in myocardial T2$$ {T}_2 $$ mapping at 3 T. Methods Outer Volume Suppression (OVS) was implemented using two regional saturation slabs, along the phase‐encoding ...
Ayda Arami, Maša Božić‐Iven, Christal van de Steeg‐Henzen, Yidong Zhao, Yi Zhang, Qian Tao, Alexandru Cernicanu, Hildebrandus Johannes Lamb, Sebastian Weingärtner   +8 more
wiley   +1 more source

A new approach to interference cancellation in D2D 5G uplink via Non orthogonal convex optimization. [PDF]

Sci Rep
Zhu M, Guo P, Liu X, Zhang H, Othmen S, Lhioui C, Flah A, Perg I.   +7 more
europepmc   +1 more source

Enhanced Transmit Efficiency of a Loop Array Combined With Out‐of‐Phase Passive Dipoles for Thoracic Spinal Cord MRI at 7T

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose The design of radiofrequency (RF) coils tailored for the target anatomy is necessary to overcome the transmit field homogeneity and penetration issues at Ultra‐High‐Field (UHF). For the spinal cord, the optimal design has not yet been determined. This work intends to demonstrate the added value of a pair of passive dipoles placed under
Hugo Amat, Marc Dubois, Aurelien Destruel, Sajad Hosseinnezhadian, Djamel Berrahou, Charles Betemps, Amira Trabelsi, David Bendahan, Stefan Enoch, Virginie Callot, Redha Abdeddaim   +10 more
wiley   +1 more source

Joint Sensor Clustering and Power Allocation in Wireless Body Area Networks Based on NOMA. [PDF]

Healthc Technol Lett
Deng D, Liu D, Li J.
europepmc   +1 more source

Reference‐Superimposed Reconstruction (RS‐Recon) for Arterial Spin Labeling

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Conventional arterial spin labeling (ASL) reconstruction suffers from sign‐flipping errors and/or noise bias under strong background suppression (BS), limiting SNR optimization. We propose reference‐superimposed reconstruction (RS‐recon) to enable ideal BS and robust signal recovery.
Jia Guo
wiley   +1 more source