Influence of acousto-optic interactions on the determination of the diffracted field by an array obtained from displacement measurements.

abstract：:The threshold filter is a frequently used technique in ultrasound B-scan to reject the small echoes contributed from backscattering that blur the tissue interface and reduce the image contrast. Note that using the threshold based on one value would simultaneously destroy local waveform features of the reflection echoe...

journal_title：Ultrasonics

authors： Tsui PH,Chang CC,Chang CC,Huang NE,Ho MC

更新日期：2009-05-01 00:00:00

abstract：:Lactic acid, psychrophilic, and mesophilic bacteria, Escherichia coli, Salmonella spp. and Staphylococcus aureus were enumerated on chicken breasts after treatment with different high intensity ultrasound (frequency 40 kHz, intensity 9.6 W/cm-2) application times (0, 30, and 50 min) and packaging atmospheres (aerobic ...

journal_title：Ultrasonics

authors： Piñon MI,Alarcon-Rojo AD,Renteria AL,Carrillo-Lopez LM

更新日期：2020-03-01 00:00:00

abstract：:This paper presents recent improvement on sound velocity measurements under extreme conditions, illustrated by the hypersonic sound velocity measurements of water up to 723 K and 9 GPa using Brillouin scattering technique. Because water at high pressure and high temperature is chemically very aggressive, these experim...

journal_title：Ultrasonics

authors： Decremps F,Datchi F,Polian A

更新日期：2006-12-22 00:00:00

abstract：:A reformulation of the Thomson-Haskell method is presented for calculating the reflection coefficients of multilayer structure immersing in the coupling fluid. Instead of directly multiplying the layer propagator matrix, the new method splits the layer propagator matrix and excursively determines the interface stiffne...

journal_title：Ultrasonics

authors： Chen J,Bai X,Yang K,Ju BF

更新日期：2012-12-01 00:00:00

abstract：:Surface and quasi-longitudinal acoustic wave properties have been investigated in potassium titanyl arsenate (KTiOAsO₄, KTA) single crystals for the first time. Surface acoustic wave (SAW) velocity, electromechanical coupling coefficient and power flow angle characteristics have been obtained in rotated Y-cut of KTA c...

journal_title：Ultrasonics

authors： Taziev RM

更新日期：2014-02-01 00:00:00

abstract：:The accurate estimation of time of flight (TOF) of an ultrasonic signal is essential in ultrasonic non-destructive testing (NDT). A novel method for TOF estimation based on the short-time Fourier transform (STFT) is proposed in this paper. Firstly, the time and frequency components of ultrasonic echoes are represented...

journal_title：Ultrasonics

authors： Lu Z,Ma F,Yang C,Chang M

更新日期：2020-04-01 00:00:00

abstract：:Although ultrasonic energy is widely used cleaning and degreasing of parts and assemblies in automotive and other industries, the use of ultrasonic energy in an industrial scale for textile washing is very new. This is due to the complexity of controlling the combination of chemical and mechanical effects, whereas wit...

journal_title：Ultrasonics

authors： Merdan N,Akalin M,Kocak D,Usta I

更新日期：2004-04-01 00:00:00

abstract：:Ultrasonic cutting is widely used in food processing applications to produce a clean and accurate cut. However, it is yet to be adopted as an instrument of choice in orthopaedic applications, mainly due to the high temperatures that can be generated at the cut site and the consequent requirement to use additional cool...

journal_title：Ultrasonics

authors： Cardoni A,MacBeath A,Lucas M

更新日期：2006-12-22 00:00:00

abstract：:In spite of many advances in analytical and numerical modeling techniques for solving different engineering problems, an efficient solution technique for wave propagation modeling of an electromagnetic acoustic transducer (EMAT) system is still missing. Distributed point source method (DPSM) is a newly developed semi-...

journal_title：Ultrasonics

authors： Eskandarzade M,Kundu T,Liebeaux N,Placko D,Mobadersani F

更新日期：2010-05-01 00:00:00

abstract：:Ultrasound image guided brain surgery (UGBS) requires an automatic and fast image segmentation method. The level-set and active contour based algorithms have been found to be useful for obtaining topology-independent boundaries between different image regions. But slow convergence limits their use in online US image s...

journal_title：Ultrasonics

authors： Chel H,Bora PK,Ramchiary KK

更新日期：2021-03-01 00:00:00

abstract：:This work is concerned with the reconstruction, from measured (synthetic or real) data, of a 2D penetrable fluid-like object of arbitrary cross-section embedded in a fluid of infinite extent and insonified by a plane acoustic wave. Green's theorem is used to provide a domain integral representation of the scattered fi...

journal_title：Ultrasonics

authors： Guillermin R,Lasaygues P,Sessarego JP,Wirgin A

更新日期：2001-03-01 00:00:00

abstract：:The location of continuous acoustic emission sources is a difficult problem of non-destructive testing. This article describes one-dimensional location of continuous acoustic emission sources by using an intelligent locator. The intelligent locator solves a location problem based on learning from examples. To verify w...

journal_title：Ultrasonics

authors： Kosel T,Grabec I I,Muzic P

更新日期：2000-03-01 00:00:00

abstract：:A nonlinear acoustic method to assess the damage level of a complex medium is discussed herein. Thanks to the highly nonlinear elastic signatures of cracks or, more generally, internal solid contacts, this method is able to distinguish between contributions from linear wave scattering by a heterogeneity and contributi...

journal_title：Ultrasonics

authors： Zhang Y,Tournat V,Abraham O,Durand O,Letourneur S,Le Duff A,Lascoup B

更新日期：2017-01-01 00:00:00

abstract：:This paper deals with the analysis of the guided evanescent waves in stopbands of a 1D phononic crystal (PC). A new numerical implementation is shown in order to get the complex values of the wavenumbers in a frequency range where a gap occurs. The considered phononic system is an aluminum plate with a one-dimensional...

journal_title：Ultrasonics

authors： Bavencoffe M,Morvan B,Hladky-Hennion AC,Izbicki JL

更新日期：2013-02-01 00:00:00

abstract：:The accuracy of measuring inclusion size in direct C-scan image of immersion ultrasonic testing is restricted by the lateral resolution of the focused transducer, even if a high frequency is used, and the blurred edge due to scattering of sound waves at inclusions. In this work, an improved image restoration method th...

journal_title：Ultrasonics

authors： Chen D,Xiao H,Xu J

更新日期：2019-01-01 00:00:00

abstract：:Mechanical properties of biological tissue represent important diagnostic information and are of histological and pathological relevance. In order to obtain non-invasively mechanical properties of tissue, we developed a real-time strain imaging system for clinical applications. The output data of this system also allo...

journal_title：Ultrasonics

authors： Khaled W,Reichling S,Bruhns OT,Ermert H

更新日期：2006-12-22 00:00:00

abstract：:This paper presents a method which combines electromagnetic simulation and ultrasonic simulation to build EMAT array models. For a specific sensor configuration, Lorentz forces are calculated using the finite element method (FEM), which then can feed through to ultrasonic simulations. The propagation of ultrasound wav...

journal_title：Ultrasonics

authors： Xie Y,Yin W,Liu Z,Peyton A

更新日期：2016-03-01 00:00:00

abstract：:The paper presents an equivalent circuit model of the polymer coated surface acoustic wave (SAW) resonators by combining coupling-of-mode (COM) description of SAW resonators and perturbation calculation of SAW propagation under polymer loading. An expression for the motional load produced by polymer coating is deduced...

journal_title：Ultrasonics

authors： Kshetrimayum R,Yadava RD,Tandon RP

更新日期：2011-07-01 00:00:00

abstract：:An ultrasonic method of acoustic parameter evaluation for porous materials saturated by air (or any other gas) is discussed. The method is based on the evolution of speed of sound and the attenuation inside the material when the static pressure of the gas saturating the material is changed. Asymptotic development of t...

journal_title：Ultrasonics

authors： Moussatov A,Ayrault C,Castagnède B

更新日期：2001-04-01 00:00:00

abstract：:In practical cardiology, a stethoscope based auscultation has been used to reveal the patient's clinical status. Recently, several hand-held echo devices are going on market and they are expected to play a role as "visible" auscultation instead of stethoscope. We have developed a portable and inexpensive echo device w...

journal_title：Ultrasonics

authors： Saijo Y,Nitta S,Kobayashi K,Arai H,Nemoto Y

更新日期：2004-04-01 00:00:00

abstract：:Skeletal muscle is an important secretory organ in mammals, producing myriad chemical mediators ("myokines") with distinct biological action in different tissues, including anti-inflammatory activity. Extracellular vesicles (EVs) have recently been identified as a mode of myokine transport from muscle, facilitating su...

journal_title：Ultrasonics

authors： Maeshige N,Langston PK,Yuan ZM,Kondo H,Fujino H

更新日期：2021-02-01 00:00:00

abstract：:An experimental ultrasonic sonar for use as a sensory aid with blind children is described. Novel signal processing techniques make the aid relatively simple to construct, yet allow many of its parameters to be changed in the field. In particular, the aid has two features, a variable range code and an automatic level...

journal_title：Ultrasonics

authors： Boys JT,Strelow ER,Clark GR

更新日期：1979-01-01 00:00:00

abstract：:This paper proposes a new pair of sequences whose cross-correlation values are zero except for the peak value and presents a new modulation method for an ultrasonic Doppler flowmeter with high sensitivity utilizing these sequences. In this method, transmitted and received waves are modulated and demodulated, respectiv...

journal_title：Ultrasonics

authors： Shiozaki A,Senda S,Kitabatake A,Inoue M,Matsuo H

更新日期：1979-11-01 00:00:00

abstract：:This paper presents the experimental study of a miniaturized surface acoustic waves (SAWs) rotary motor and the theoretical calculation. After the first success in SAW rotary motor operating at 9.85 MHz, a smaller rotary motor is designed. With the operating frequency of 30 MHz and the driving voltage of 120 V(p-p), t...

journal_title：Ultrasonics

authors： Cheng LP,Zhang GM,Zhang SY,Yu J,Shui XJ

更新日期：2002-06-01 00:00:00

abstract：:Elasticity assessment based on bulk wave velocity (BWV) measurements is the most popular technique to characterize the anisotropic stiffness tensor in cortical bone. Typically, a cuboid bone specimen is cut with its sides along the different anatomical directions. Then, the velocity of shear and longitudinal waves pro...

journal_title：Ultrasonics

authors： Peralta L,Cai X,Laugier P,Grimal Q

更新日期：2017-09-01 00:00:00

abstract：:We develop a new ultrasonic imaging framework for non-destructive testing of an immersed specimen featuring an irregular top surface and demonstrate its capability of accurately depicting the lower surfaces of multiple damages hidden in the specimen. Central to the framework is a multistep angular spectrum approach (A...

journal_title：Ultrasonics

authors： Yang X,Wang K,Xu Y,Xu L,Hu W,Wang H,Su Z

更新日期：2020-12-01 00:00:00

abstract：:The present study is focused on the development and characterization of an innovative substrate to optimize the axial resolution of ultrasonic transducers on a silicon substrate that is dedicated to ultrasound imaging. The substrate must efficiently dampen wave propagation to avoid degradation of the axial resolution ...

journal_title：Ultrasonics

authors： Lascaud J,Defforge T,Gautier G,Certon D

更新日期：2019-07-01 00:00:00

abstract：:In ultrasonic non-destructive testing of materials with a coarse-grained structure the scattering from the grains causes backscattering noise, which masks flaw echoes in the measured signal. Several filtering methods have been proposed for improving the signal-to-noise ratio. In this paper we present a comparative stu...

journal_title：Ultrasonics

authors： Matz V,Smid R,Starman S,Kreidl M

更新日期：2009-12-01 00:00:00

abstract：:Conventionally, the ultrasonic polar scan (UPS) records the amplitude or time-of-flight in transmission using short ultrasonic pulses for a wide range of incidence angles, resulting in a fingerprint of the critical bulk wave angles of the material at the insonified spot. Here, we investigate the use of quasi-harmonic ...

journal_title：Ultrasonics

authors： Kersemans M,Martens A,Van Den Abeele K,Degrieck J,Pyl L,Zastavnik F,Sol H,Van Paepegem W

更新日期：2015-04-01 00:00:00

abstract：:The motivation for this research stems from a need for providing a non-destructive testing method capable of detecting and locating any defects and microstructural variations within armour ceramic components before issuing them to the soldiers who rely on them for their survival. The development of an automated ultras...

journal_title：Ultrasonics

authors： Kesharaju M,Nagarajah R

更新日期：2015-09-01 00:00:00