Results 31 to 40 of about 297,354 (275)

Mathematical Analysis of Ultrafast Ultrasound Imaging [PDF]

, 2016
This paper provides a mathematical analysis of ultrafast ultrasound imaging. This newly emerging modality for biomedical imaging uses plane waves instead of focused waves in order to achieve very high frame rates.
Alberti, Giovanni S., Ammari, Habib, Romero, Francisco, Wintz, Timothée   +3 more
core   +2 more sources

Effect of Ultrafast Imaging on Shear Wave Visualization and Characterization: An Experimental and Computational Study in a Pediatric Ventricular Model

Applied Sciences, 2017
Plane wave imaging in Shear Wave Elastography (SWE) captures shear wave propagation in real-time at ultrafast frame rates. To assess the capability of this technique in accurately visualizing the underlying shear wave mechanics, this work presents a ...
Annette Caenen, Mathieu Pernot, Ingvild Kinn Ekroll, Darya Shcherbakova, Luc Mertens, Abigail Swillens, Patrick Segers   +6 more
doaj   +1 more source

Gaussian Beam Migration for Free-Surface Multiples in VSP

Frontiers in Earth Science, 2022
The vertical seismic profiling (VSP) Gaussian beam migration is a seismic imaging method with both computational efficiency and imaging precision. It can get high-resolution structural features near the well.
Dai Yu, Feilong Yang, Bo Wen, Ying Wang, Dezhi Huang, Chi Zhao   +5 more
doaj   +1 more source

Sonic crystal lenses that obey Lensmaker's formula [PDF]

, 2003
This paper presents a theoretical study of the phenomenon of acoustic imaging by sonic crystals, which are made of two-dimensional regular arrays of rigid cylinders placed in parallel in air.
Beaver W L, Bloch F, Brillouin L, Brillouin L, Brillouin L, Caballero D, Chao-Hsien Kuo, Chen Y-Y, Dowling J P, Garcia N, Gupta B, Hecht E, Kushwaha M S, Martínez-Sala R, Medwin H, Robertson W M, Twersky V, Yariv A, Ye Z, Zhen Ye   +19 more
core   +1 more source

A Study on the Simulation of New Linear Transducer Based on the Ultrafast Ultrasonic Imaging Technology

MATEC Web of Conferences, 2015
The ultrafast ultrasonic imaging technology based on the transmitting/receiving principle of plane wave has become a research hotspot in the ultrasonic field of international medicine.
Guoa Ning, Yea Weiqiang, Wang Congzh, Zheng Hairong   +3 more
doaj   +1 more source

Deep tissue space-gated microscopy via acousto-optic interaction

Nature Communications, 2020
In ideal diffraction-limited optical microscopy imaging depth is limited by the multiply scattered wave. Here, the authors present a space gating method, based on an acoustic focus in the object plane and reconstruction using only the acousto-optically ...
Mooseok Jang, Hakseok Ko, Jin Hee Hong, Won Kyu Lee, Jae-Seung Lee, Wonshik Choi   +5 more
doaj   +1 more source

Full-Field Super-Resolution Terahertz Imaging Based on Rotating Coherent Scattering Microscopy

Applied Sciences, 2023
For decades, terahertz (THz) microscopic imaging has been limited by the resolution of the system due to the larger wavelength, the power of the source, and the equivalent noise power of the detector, so a lot of research has focused on single-point ...
Duoxuan Ma, Jie Zhao, Dayong Wang, Hao Lin, Lu Rong, Yunxin Wang, Shufeng Lin   +6 more
doaj   +1 more source

Comparison of Spatial and Temporal Averaging on Ultrafast Imaging in Presence of Quantization Errors [PDF]

, 2015
In compound plane wave imaging (CPWI), multiple plane waves are used to insonify the imaging region with different steering angles. The compounding operation is effectively a spatial averaging filter that reduces the speckles of the image and increases ...
Alomari, Z, Freear, S, Harput, S, Moubark, AM   +3 more
core   +1 more source

Shunt quantification in congenital heart disease based on two-dimensional speckle tracking [PDF]

, 2012
In this work we investigated how high frame rate speckle tracking based on plane wave imaging could be used to improve the quantification of peak velocities in shunt flows due to septal defects.
Fadnes, Solveig, Lovstakken, Lasse, Nyrnes, Siri Ann, Swillens, Abigail, Torp, Hans   +4 more
core   +2 more sources

Stiffness pulsation of the human brain detected by non-invasive time-harmonic elastography

Frontiers in Bioengineering and Biotechnology, 2023
Introduction: Cerebral pulsation is a vital aspect of cerebral hemodynamics. Changes in arterial pressure in response to cardiac pulsation cause cerebral pulsation, which is related to cerebrovascular compliance and cerebral blood perfusion ...
Tom Meyer, Bernhard Kreft, Judith Bergs, Erik Antes, Matthias S. Anders, Brunhilde Wellge, Jürgen Braun, Marvin Doyley, Heiko Tzschätzsch, Ingolf Sack   +9 more
doaj   +1 more source