Results 81 to 90 of about 297,354 (275)
Compound Mask for Divergent Wave Imaging in Medical Ultrasound
IEEE AccessDivergent wave imaging with coherent compounding allows obtaining broad field-of-view and higher frame rate with respect to line-by-line insonification. However, the spatial and contrast resolution crucially depends on the weights applied in the compound
Zahraa Alzein +2 more
doaj +1 more source
Real-time Experimental Demonstrations of a Photonic Lantern Wave-front Sensor
The Astrophysical Journal Letters, 2023 The direct imaging of an Earth-like exoplanet will require sub-nanometric wave-front control across large light-collecting apertures to reject host starlight and detect the faint planetary signal.
Jonathan W. Lin +14 more
doaj +1 more source
Plane-Wave Contrast Imaging: A Radiation Force Point of View
IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2018 Radiation force is known to produce microbubble axial displacements by an amount that depends on the transmit burst frequency, amplitude, and length, as well as the pulse repetition frequency (PRF). In the standard focused-imaging mode, the actual PRF experienced by each microbubble is low, because it is of the order of the frame rate (i.e., usually ...
Lauchlin M. Blue +5 more
openaire +3 more sources
Perfect imaging: they don't do it with mirrors [PDF]
, 2010 Imaging with a spherical mirror in empty space is compared with the case when the mirror is filled with the medium of Maxwell's fish eye. Exact time-dependent solutions of Maxwell's equations show that perfect imaging is not achievable with an electrical
Blaikie R J +12 more
core +2 more sources
Aquaporin‐4 in Narcolepsy Type 1: Investigation of Perivascular Fluid Movement in Sleep Disorders
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Narcolepsy type 1 (NT1) is caused by the loss of hypocretin‐1 leading to excessive daytime sleepiness and cataplexy. Additionally, disrupted nighttime sleep has become an increasingly recognized feature of NT1. As the glymphatic fluid movement has been linked to sleep architecture, we investigated cerebrospinal fluid (CSF) Aquaporin‐4 (AQP4 ...
Jonas Ranke +5 more
wiley +1 more source
Localization, Stability, and Resolution of Topological Derivative Based Imaging Functionals in Elasticity [PDF]
, 2012 The focus of this work is on rigorous mathematical analysis of the topological derivative based detection algorithms for the localization of an elastic inclusion of vanishing characteristic size.
Ammari, Habib +5 more
core +4 more sources
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Just recently, successful chimeric antigen receptor (CAR) T cell therapy was reported in the first patient with refractory, anti‐diacylglycerol lipase alpha (DAGLA) antibody‐mediated autoimmune encephalitis, achieving partial clinical remission.
Dimitrios Mougiakakos +9 more
wiley +1 more source
Compact Implicit Neural Representations for Plane Wave Images
2024 IEEE Ultrasonics, Ferroelectrics, and Frequency Control Joint Symposium (UFFC-JS)Ultrafast Plane-Wave (PW) imaging often produces artifacts and shadows that vary with insonification angles. We propose a novel approach using Implicit Neural Representations (INRs) to compactly encode multi-planar sequences while preserving crucial orientation-dependent information.
Mathilde Monvoisin +2 more
openaire +2 more sources
, 2017 A novel design of an elastic metamaterial with anisotropic mass density is proposed to manipulate flexural waves at a subwavelength scale. The three-dimensional metamaterial is inspired by kirigami, which can be easily manufactured by cutting and folding
Huang, G. L. +3 more
core +2 more sources
Time-Delay Multiplexing of Two Beams in a Terahertz Imaging Radar [PDF]
, 2010 We demonstrate a time-delay multiplexing technique that doubles the frame rate of a 660–690-GHz imaging radar with minimal additional instrument complexity.
Bryllert, Tomas +5 more
core +1 more source