Simultaneous optoacoustic, pulse-echo and transmission ultrasound tomography of mice (Conference Presentation)

2020 ◽  
Author(s):  
Elena Mercep ◽  
Joaquín L. Herraiz ◽  
Xosé Luís Deán-Ben ◽  
Daniel . Razansky
Keyword(s):  
Ultrasound Tomography ◽  
Pulse Echo

Computed Ultrasound Tomography in Echo mode (CUTE) of speed of sound for diagnosis and for aberration correction in pulse-echo sonography

2014 ◽  
Author(s):  
Michael Jaeger ◽  
Gerrit Held ◽  
Stefan Preisser ◽  
Sara Peeters ◽  
Michael Grünig ◽  
...  
Keyword(s):  
Speed Of Sound ◽  
Aberration Correction ◽  
Ultrasound Tomography ◽  
Pulse Echo

scholarly journals The Application of Adaptive Time Gain Compensation in an Improved Breast Ultrasound Tomography Algorithm

2019 ◽  
Vol 9 (12) ◽  
pp. 2574
Author(s):  
Chang Liu ◽  
Binzhen Zhang ◽  
Chenyang Xue ◽  
Guojun Zhang ◽  
Wendong Zhang ◽  
...  
Keyword(s):  
Attenuation Coefficient ◽  
Ultrasonic Transducer ◽  
Correlation Method ◽  
Reconstruction Algorithm ◽  
Ultrasound Tomography ◽  
Attenuation Coefficients ◽  
Gain Compensation ◽  
Adaptive Time ◽  
Pulse Echo ◽  
Horizontal Slice

In order to better detect information about a mass in breast tissue, an ultrasound tomography algorithm based on adaptive time gain compensation (TGC) was designed. Field II was utilized to automatically evaluate the phantom attenuation coefficient and compensate for the attenuated image. The image reconstruction algorithm process is presented here. Furthermore, the experimental setup with the cylindrical motion of a piezoelectric micromachined ultrasonic transducer (PMUT) linear array was used to detect the mass in the breast model. The attenuation coefficient was evaluated by using the spectral cross-correlation method. According to the acquired attenuation coefficients, TGC compensates for the pulse-echo signal, and the horizontal slice image was reconstructed using the tomography algorithm. The experimental results show that this algorithm can evaluate the attenuation coefficient of the breast model and improve the ability to detect an internal mass. At the same time, the realization of attenuation compensation with software is beneficial to the development of portable medical equipment.

Computed Ultrasound Tomography in Echo Mode for Imaging Speed of Sound Using Pulse-Echo Sonography: Proof of Principle

2015 ◽  
Vol 41 (1) ◽  
pp. 235-250 ◽  
Author(s):  
Michael Jaeger ◽  
Gerrit Held ◽  
Sara Peeters ◽  
Stefan Preisser ◽  
Michael Grünig ◽  
...  
Keyword(s):  
Speed Of Sound ◽  
Ultrasound Tomography ◽  
Pulse Echo ◽  
Imaging Speed ◽  
Proof Of Principle

COMPARISON OF COMPUTED ULTRASOUND TOMOGRAPHY AND PULSE-ECHO IMAGING IN THE HEAD

1983 ◽  
Vol 7 (1) ◽  
pp. 206
Author(s):  
K. A. Dines ◽  
F. J. Fry ◽  
J. T. Patrick ◽  
R. L. Gilmor
Keyword(s):  
Ultrasound Tomography ◽  
Pulse Echo

Acoustic microscopy techniques for the inspection of integrated circuit devices and packages

1992 ◽  
Vol 50 (2) ◽  
pp. 966-967
Author(s):  
Thomas M. Moore
Keyword(s):  
Integrated Circuit ◽  
Acoustic Microscopy ◽  
Hybrid Technique ◽  
Frequency Scanning ◽  
Ic Packaging ◽  
Ic Package ◽  
Microscopy Techniques ◽  
Ic Package Inspection ◽  
Pulse Echo ◽  
Scanning Acoustic Microscope

In the last decade, a variety of characterization techniques based on acoustic phenomena have come into widespread use. Characteristics of matter waves such as their ability to penetrate optically opaque solids and produce image contrast based on acoustic impedance differences have made these techniques attractive to semiconductor and integrated circuit (IC) packaging researchers.These techniques can be divided into two groups. The first group includes techniques primarily applied to IC package inspection which take advantage of the ability of ultrasound to penetrate deeply and nondestructively through optically opaque solids. C-mode Acoustic Microscopy (C-AM) is a recently developed hybrid technique which combines the narrow-band pulse-echo piezotransducers of conventional C-scan recording with the precision scanning and sophisticated signal analysis capabilities normally associated with the high frequency Scanning Acoustic Microscope (SAM). A single piezotransducer is scanned over the sample and both transmits acoustic pulses into the sample and receives acoustic echo signals from the sample.

Effect of Bi2O3 on Elastic Properties of Silica Bismuthate Glasses by Pulse-Echo Method

2012 ◽  
Vol 2 (5) ◽  
pp. 546-548
Author(s):  
P. Vasantharani P. Vasantharani ◽  
◽  
I.Sankeeda I.Sankeeda
Keyword(s):  
Elastic Properties ◽  
Pulse Echo ◽  
Pulse Echo Method

Changing the Static and Dynamic Lattice Effects for the Improvement of the Ionic Transport Properties Within the Argyrodite Li6PS5-xSexI

2019 ◽  
Author(s):  
Roman Schlem ◽  
Michael Ghidiu ◽  
Sean Culver ◽  
Anna-Lena Hansen ◽  
Wolfgang Zeier
Keyword(s):  
Ionic Conductivity ◽  
Activation Barrier ◽  
Parent Compound ◽  
Ionic Transport ◽  
X Ray Diffraction ◽  
X Ray ◽  
Lattice Effects ◽  
Solid State Batteries ◽  
All Solid State Batteries ◽  
Pulse Echo

<p>The lithium argyrodites Li<sub>6</sub>PS<sub>5</sub>X (X = Cl, Br, I) have been gaining momentum as candidates for electrolytes in all-solid-state batteries. While these materials have been well-characterized structurally, the influences of the static and dynamic lattice properties are not fully understood. Recent improvements to the ionic conductivity of Li<sub>6</sub>PS<sub>5</sub>I (which as a parent compound is a poor ionic conductor) via elemental substitutions have shown that a multitude of influences affect the ionic transport in the lithium argyrodites, and that even poor conductors in this class have room left for improvement.</p><p>Here we explore the influence of isoelectronic substitution of sulfur with selenium in Li<sub>6</sub>PS<sub>5-<i>x</i></sub>Se<i><sub>x</sub></i>I. Using a combination of X-ray diffraction, impedance spectroscopy, Raman spectroscopy, and pulse-echo speed of sound measurements,we explore the influence of the static and dynamic lattice on the ionic transport. The substitution of S<sup>2-</sup>with Se<sup>2- </sup>broadens the diffusion pathways and structural bottlenecks, as well as leading to a softer more polarizable lattice, all of which lower the activation barrier and lead to an increase in the ionic conductivity. This work sheds light on ways to systematically understand and improve the functional properties of this exciting material family. </p>

Оценка реальной чувствительности приемочного ультразвукового контроля рельсов

2020 ◽  
pp. 17-27
Author(s):  
А.А. Шелухин
Keyword(s):  
Ultrasonic Pulse ◽  
Piezoelectric Transducers ◽  
Acoustic Path ◽  
Metallic Inclusion ◽  
Inclusion Type ◽  
The Real ◽  
Rail Head ◽  
Pulse Echo

In this article, the analysis of the acoustic path during the ultrasonic pulse echo testing of the rail head in production is carried out. The influence of the parameters of the applied piezoelectric transducers on the distribution of sensitivity for the sounding scheme used in the existing installations is estimated and the real sensitivity of detecting defects of the «non-metallic inclusion» type is estimated.

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