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：:Ultrasonic testing has been used for many decades, proving itself very efficient for detecting defects in many industrial sectors. The desire to apply ultrasonic testing to geometrically complex structures, and to anisotropic, inhomogeneous materials, together with the advent of more powerful electronics and software,...

journal_title：Ultrasonics

authors： Mineo C,Lines D,Cerniglia D

更新日期：2021-03-01 00:00:00

abstract：:Nonalcoholic fatty liver disease (NAFLD) is the most common chronic liver disease. Quantitative ultrasound facilitates clinical grading of hepatic steatosis (the early stage of NAFLD). However, the utility of quantitative ultrasound as a first-line method for community screening of hepatic steatosis remains unclear. T...

journal_title：Ultrasonics

authors： Chang TY,Chang SH,Lin YH,Ho WC,Wang CY,Jeng WJ,Wan YL,Tsui PH

更新日期：2021-03-01 00:00:00

abstract：:Features of an acoustic energy trapping and outflow in a High-overtone Bulk Acoustic Resonator (HBAR) were considered. On the example of a specified resonator based on a piezoelectric layered structure (PLS) as "Al/AlN/Mo/(100) diamond", the simulation of the propagation of microwave acoustic waves in the range of 10-...

journal_title：Ultrasonics

authors： Kvashnin GM,Sorokin BP

更新日期：2021-03-01 00:00:00

abstract：:Most methods used to measure the thickness of thin liquid or solid surface films and coatings need access to the coated surface. In this work reflected ultrasonic pulses were used to measure a coating thickness from a solid back face. Piezoelectric transducers on the solid back face emitted ultrasound waves and receiv...

journal_title：Ultrasonics

authors： Kanja J,Mills R,Li X,Brunskill H,Hunter AK,Dwyer-Joyce RS

更新日期：2021-02-01 00:00:00

abstract：:In this paper, the development of modified beamforming methods, Filtered Delay Weight Multiply and Sum (F-DwMAS) and Filtered Delay Euclidian-Weighted Multiply and Sum (F-DewMAS), are reported. These methods were investigated on a minimum-redundancy synthetic aperture technique, called as 2 element Receive Synthetic A...

journal_title：Ultrasonics

authors： Vayyeti A,Thittai AK

更新日期：2021-02-01 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：:In this paper a high intensity focused ultrasound (FUS) phantom model was developed, in order to be used in experiments for Blood Brain Barrier (BBB) disruption. The target was to create a phantom model that represents the disruption of the BBB during ultrasound application. An appropriate experimental setup was creat...

journal_title：Ultrasonics

authors： Alekou T,Giannakou M,Damianou C

更新日期：2021-02-01 00:00:00

abstract：:The paper investigates the existence of interfacial (Stoneley-type) acoustic waves localised at the internal boundary between two semi-infinite superlattices which are adjoined with each other to form one-dimensional phononic bicrystal. Each superlattice is a periodic sequence of perfectly bonded homogeneous and/or fu...

journal_title：Ultrasonics

authors： Darinskii AN,Shuvalov AL

更新日期：2021-01-01 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：:High-frequency calibration of hydrophones is becoming increasingly important, both for clinical and scientific applications of ultrasound, and user safety. At present, the calibrations available routinely to the user community extend to 60 MHz. However, hydrophones that can measure beyond this are available, and ultra...

journal_title：Ultrasonics

authors： Rajagopal S,Cox BT

更新日期：2020-12-01 00:00:00

abstract：:To improve the integrated performance of a representative bimodal linear ultrasonic motor under continuous operation, this paper proposes a novel dual-frequency asymmetric excitation method for such motors which can operate under traditional single-phase asymmetric or two-phase symmetric excitation modes. In particula...

journal_title：Ultrasonics

authors： Li X,Huang Y,Zhou L

更新日期：2020-12-01 00:00:00

abstract：:A single-mode linear ultrasonic motor was developed in this study. On the stator, a group of four pieces of piezoelectric ceramics PZT8 were utilized to generate the ultrasonic vibration. A specially designed modal conversion horn with an oblique beam was applied to transfer the longitudinal vibration to an additional...

journal_title：Ultrasonics

authors： Yin Z,Dai C,Cao Z,Li W,Chen Z,Li C

更新日期：2020-12-01 00:00:00

abstract：:Machining temperature is a key factor in ultrasonic vibration-assisted milling as it can significantly influence tool wear rate and residual thermal stresses. In current study, a physics-based analytical predictive model on machining temperature in ultrasonic vibration-assisted milling is proposed, without resorting t...

journal_title：Ultrasonics

authors： Feng Y,Hsu FC,Lu YT,Lin YF,Lin CT,Lin CF,Lu YC,Liang SY

更新日期：2020-12-01 00:00:00

abstract：:The present paper studies experimentally and numerically the surface acoustic wave (SAW) field on a piezoelectric substrate generated by interdigital transducers (IDT). On the one hand, mechanical displacements produced by the SAW are measured with the help of a laser Doppler vibrometer. On the other hand, mechanical ...

journal_title：Ultrasonics

authors： Weser R,Darinskii AN,Weihnacht M,Schmidt H

更新日期：2020-08-01 00:00:00

abstract：:Local Defect Resonance (LDR) is exploited for non-destructive testing (NDT) by using ultrasonic vibrations to get a localized resonant activation of defected zones. The LDR technique relies on the local stiffness difference between the defect and the sound material. Analyzing the structure's displacement field at this...

journal_title：Ultrasonics

authors： Segers J,Hedayatrasa S,Poelman G,Van Paepegem W,Kersemans M

更新日期：2020-07-01 00:00:00

abstract：:Steel-concrete modular construction is increasingly used in nuclear structure construction. Conventional nondestructive testing methods are not able to detect internal concrete defects because the thick concrete wall is covered by steel plates. An ultrasonic guided method is proposed to detect honeycombs and voids aro...

journal_title：Ultrasonics

authors： Sun H,Zhu J

更新日期：2020-04-01 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：:In previous work, we have demonstrated the use of single-holed Armoured Microbubbles (AMBs) for microfluidic mixing and self-propulsion. AMBs are hollow partial spheres, inside which we capture a bubble. Under ultrasound, the bubble oscillates, generating a streaming flow with velocities of 1-100 mm/s in water. In thi...

journal_title：Ultrasonics

authors： Spelman TA,Stephan O,Marmottant P

更新日期：2020-03-01 00:00:00

abstract：:Ultrasonic vibration has been observed to lower the flow stress necessary to initiate plastic deformation, a phenomenon known as "acoustic softening". This unique effect of ultrasound has been extensively applied in welding, machining, forming of metals, and ultrasonic additive manufacturing to lower the yield stress ...

journal_title：Ultrasonics

authors： Mao Q,Coutris N,Rack H,Fadel G,Gibert J

更新日期：2020-03-01 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：:Development of acoustic source localization techniques in anisotropic plates has gained attention in the recent past and still has scope of improvement. Most of such techniques existing in the literature either require known material properties or assume a straight line propagation of wave energy from the acoustic sou...

journal_title：Ultrasonics

authors： Sen N,Kundu T

更新日期：2020-01-01 00:00:00

abstract：:In this work, we investigate the efficiency of graphene production from graphite by ultrasonic-induced exfoliation under different operational conditions. An ultrasonic bath and an ultrasonic horn tip were used, to show how the graphene production efficiency depends on the acoustic intensity and cavitation mechanism u...

journal_title：Ultrasonics

authors： Silva LI,Mirabella DA,Pablo Tomba J,Riccardi CC

更新日期：2020-01-01 00:00:00

abstract：:An inversion algorithm (termed AEDep) is proposed for estimating the depth of acoustic emission (AE) sources in plate-like structural components. The work is motivated by the need for characterizing early-stage fatigue crack growth in such components. The algorithm achieves depth estimation by automatically extracting...

journal_title：Ultrasonics

authors： Dubuc B,Ebrahimkhanlou A,Livadiotis S,Salamone S

更新日期：2019-11-01 00:00:00

abstract：:The numerical studies conducted in this paper are based on our previous research (Chen et al., 2017); through use of the spectral element method, parametric sensitivity studies of Nonlinear Coda Wave Interferometry (NCWI) are established here and divided into two parts. In the first part, CWI observables are found to ...

journal_title：Ultrasonics

authors： Chen G,Pageot D,Abraham O,Zhang Y,Chekroun M,Tournat V

更新日期：2019-11-01 00:00:00

abstract：:This research paper is the experimental study to investigate the effect of ultrasound sensitivity in the pure methane gas space as the pressure and sensor distance increases. We offer the solution to overcome the low sensitivity characteristics of ultrasonic sensors in the methane gas space. This proposal shows the ph...

journal_title：Ultrasonics

authors： Kim K,Choi D,Im S

更新日期：2019-11-01 00:00:00

abstract：:The Total Focusing Method (TFM) yields a focused image in emission and in reception while Phased Array (PA) imaging provides Dynamic Depth Focusing (DDF) in reception only. Besides, most NDE applications have two propagation media, where refraction at the interface complicates time-of-flight (TOF) and focal law comput...

journal_title：Ultrasonics

authors： Cruza JF,Camacho J,Mateos R,Fritsch C

更新日期：2019-11-01 00:00:00

abstract：:Guided acoustic waves, such as Lamb waves, are widely applied for material characterization, sensing of liquids and the generation of streaming in liquids. There are numerical simulation tools for the prediction of their propagation near a solid-liquid boundary but a demand for complementary measurement techniques for...

journal_title：Ultrasonics

authors： Tietze S,Lindner G

更新日期：2019-11-01 00:00:00

abstract：:This paper presents the results of the theoretical and 2D FEM modeling excitation and detection of evanescent acoustic waves in piezoelectric plates. By application of 2D ordinary differential equations derived by Auld, we obtained the dispersion curves of A1 and SH1 waves in YX LiNbO3 and YX KNbO3 plates in proximity...

journal_title：Ultrasonics

authors： Kuznetsova I,Nedospasov I,Smirnov A,Qian ZH,Wang B,Dai XY

更新日期：2019-11-01 00:00:00

abstract：:Thrombosis is an extremely critical clinical condition where a clot forms inside a blood vessel which blocks the blood flow through the cardiovascular system. Previous sonothrombolysis methods using ultrasound and microbubbles (MBs) often have a relatively low lysis rate due to the low microbubbles concentration at cl...

journal_title：Ultrasonics

authors： Zhang B,Kim H,Wu H,Gao Y,Jiang X

更新日期：2019-09-01 00:00:00

abstract：:We present a method to generate sub-microsecond quasi-unipolar pressure pulses. Our approach is based on the laser irradiation of a thin copper wire submerged in water. The acoustic waveforms were recorded using two different, well characterized, wideband detection techniques: piezoelectric and optical interferometry....

journal_title：Ultrasonics

authors： González MG,Riobó LM,Ciocci Brazzano L,Veiras FE,Sorichetti PA,Santiago GD

更新日期：2019-09-01 00:00:00

abstract：:A nonlinear ultrasonic method is proposed based on a group of newly discovered wave triplets where two primary codirectional shear-horizontal SH0 waves mix in a weakly nonlinear plate and generate a cumulative S0 Lamb wave at the sum frequency. Theoretical analyses show that any combination of two primary SH0 waves wh...

journal_title：Ultrasonics

authors： Shan S,Hasanian M,Cho H,Lissenden CJ,Cheng L

更新日期：2019-07-01 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 linear-array photoacoustic imaging (PAI), beamforming methods can be used to reconstruct the images. Delay-and-sum (DAS) beamformer is extensively used due to its simple implementation. However, this algorithm results in high level of sidelobes and low resolution. In this paper, it is proposed to form the photoacou...

journal_title：Ultrasonics

authors： Paridar R,Mozaffarzadeh M,Periyasamy V,Pramanik M,Mehrmohammadi M,Orooji M

更新日期：2019-07-01 00:00:00

abstract：:An ultrasonic technique for imaging nonlinear scatterers, such as partially-closed cracks, buried in a medium has been recently proposed. The method called fundamental wave amplitude difference (FAD) consists of a sequence of acquisitions with different subsets of elements for each line of the image. An image revealin...

journal_title：Ultrasonics

authors： Haupert S,Ohara Y,Carcreff E,Renaud G

更新日期：2019-07-01 00:00:00

abstract：:Experimentally observed dissipated nonlinearity in Lamb wave propagation in composites due to stress-relaxation is reported herein. It was found that the stress relaxation in composite is inherently coupled with the second order nonlinear parameter derived from the Lamb wave modes. Due to the combined effect of intern...

journal_title：Ultrasonics

authors： Patra S,Ahmed H,Saadatzi M,Banerjee S

更新日期：2019-07-01 00:00:00

abstract：:The purpose of this study is to explore the feasibility of time-dependent acoustic impedance measurement by Scanning Acoustic Microscopy (SAM) for analyzing the sodium diffusion. The purpose is motivated by the fact that sodium monitoring is challenging and still in the area of exploratory analysis despite its biologi...

journal_title：Ultrasonics

authors： Demirkan I,Unlu MB,Bilen B

更新日期：2019-04-01 00:00:00

abstract：:The aim of this paper is to investigate propagation characteristics and the generation mechanism of the nonlinear lowest-order symmetric Lamb mode (S0) which propagates downslope in free elastic plates with slowly linearly varying-thickness. From theoretical analyses, in a low frequency-thickness product (fd) range, t...

journal_title：Ultrasonics

authors： Hu Z,An Z,Kong Y,Lian G,Wang X

更新日期：2019-04-01 00:00:00

abstract：:Ultrasonic flaw classification in weldment is an active area of research and many artificial intelligence approaches have been applied to automate this process. However, in the industrial applications, the ultrasonic flaw signals are not noise free and automatic intelligent defect classification algorithms show relati...

journal_title：Ultrasonics

authors： Munir N,Kim HJ,Park J,Song SJ,Kang SS

更新日期：2019-04-01 00:00:00

abstract：:Explicit integral representations for the wave fields generated by air-coupled or underwater transducers in an acoustic medium with a submerged elastic (metallic or laminate composite) plate are obtained in the form of path Fourier integrals. Together with the far-field asymptotics for the incident, reflected, transmi...

journal_title：Ultrasonics

authors： Glushkov EV,Glushkova NV,Miakisheva OA

更新日期：2019-04-01 00:00:00