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Deep learning techniques to detect rail indications from ultrasonic data for automated rail monitoring and maintenance Ultrasonics (IF 4.2) Pub Date : 2024-04-09 Md Ashraful Islam, Georg Olm
The increasing number of passengers and services using railways and the corresponding increase in rail use has caused the acceleration of rail wear and surface defects which makes rail defect identification an important issue for rail maintenance and monitoring to ensure safe and efficient operation. Traditional visual inspection methods for identifying rail defects are time-consuming, less accurate
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A lung disease diagnosis algorithm based on 2D spectral features of ultrasound RF signals Ultrasonics (IF 4.2) Pub Date : 2024-04-08 Qi Zhang, Renjie Song, Jing Hang, Siqi Wei, Yifei Zhu, Guofeng Zhang, Bo Ding, Xinhua Ye, Xiasheng Guo, Dong Zhang, Pingping Wu, Han Lin, Juan Tu
Lung diseases are commonly diagnosed based on clinical pathological indications criteria and radiological imaging tools (, X-rays and CT). During a pandemic like COVID-19, the use of ultrasound imaging devices has broadened for emergency examinations by taking their unique advantages such as portability, real-time detection, easy operation and no radiation. This provides a rapid, safe, and cost-effective
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Unsupervised machine learning for flaw detection in automated ultrasonic testing of carbon fibre reinforced plastic composites Ultrasonics (IF 4.2) Pub Date : 2024-04-06 Vedran Tunukovic, Shaun McKnight, Richard Pyle, Zhiming Wang, Ehsan Mohseni, S. Gareth Pierce, Randika K. W. Vithanage, Gordon Dobie, Charles N. MacLeod, Sandy Cochran, Tom O'Hare
The use of Carbon Fibre Reinforced Plastic (CFRP) composite materials for critical components has significantly surged within the energy and aerospace industry. With this rapid increase in deployment, reliable post-manufacturing Non-Destructive Evaluation (NDE) is critical for verifying the mechanical integrity of manufactured components. To this end, an automated Ultrasonic Testing (UT) NDE process
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Performance evaluation of commercial and non-commercial shear wave elastography implementations for vascular applications Ultrasonics (IF 4.2) Pub Date : 2024-04-06 Judith T. Pruijssen, Floris H.B.M. Schreuder, Joyce Wilbers, Johannes H.A.M. Kaanders, Chris L. de Korte, Hendrik H.G. Hansen
Shear wave elastography (SWE) is mainly used for stiffness estimation of large, homogeneous tissues, such as the liver and breasts. However, little is known about its accuracy and applicability in thin (∼0.5–2 mm) vessel walls. To identify possible performance differences among vendors, we quantified differences in measured wave velocities obtained by commercial SWE implementations of various vendors
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Impact monitoring of large size complex metal structures based on sparse sensor array and transfer learning Ultrasonics (IF 4.2) Pub Date : 2024-03-27 Bowen Zhao, Yiliang Zhang, Qijian Liu, Xinlin Qing
During aircraft operations, the impact events experienced by the aircraft may cause damage to the structure, thus posing a safety hazard. Therefore, an accurate determination of where the impact occurred and the time history of the impact force can provide an important basis for assessing the condition of the aircraft. However, modern aircraft structures are often large and complex, and relying on
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Adaptive higher-order singular value decomposition clutter filter for ultrafast Doppler imaging of coronary flow under non-negligible tissue motion Ultrasonics (IF 4.2) Pub Date : 2024-03-26 Yizhou Huang, Xufei Chen, Emilia Badescu, Maarten Kuenen, Odile Bonnefous, Massimo Mischi
With the development of advanced clutter-filtering techniques by singular value decomposition (SVD) and leveraging favorable acquisition settings such as open-chest imaging by a linear high-frequency probe and plane waves, several studies have shown the feasibility of cardiac flow measurements during the entire cardiac cycle, ranging from coronary flow to myocardial perfusion. When applying these techniques
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Transdermal drug delivery mediated by acoustic vortex beam Ultrasonics (IF 4.2) Pub Date : 2024-03-26 Yuzhi Li, Mingcong Guo, Gepu Guo, Qingyu Ma
Ultrasound-mediated transdermal drug delivery exhibits various advantages such as biocompatibility, controllability and safety, which attracts plenty of interests within biomedical field. Current researches mostly emphasizes the acoustic cavitation generated by planar or focused waves while neglecting other physics that occur during transportation. Our experimental study illustrates the presence of
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Grating lobe mitigation on large-pitch arrays using null subtraction imaging Ultrasonics (IF 4.2) Pub Date : 2024-03-24 Mick Gardner, Rita J. Miller, Michael L. Oelze
Null Subtraction Imaging (NSI) is a novel beamforming technique that can produce B-mode images resulting in high spatial resolution and low computational cost compared to other beamforming techniques. Previous work has demonstrated that in addition to a beam pattern with a narrow main lobe and low side lobes, NSI can also reduce or mitigate grating lobes, which can appear when the array pitch is larger
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Analytical and numerical modeling of nonlinear lamb wave interaction with a breathing crack with low-frequency modulation Ultrasonics (IF 4.2) Pub Date : 2024-03-23 Peilong Yuan, Xiaodong Xu, Christ Glorieux, Kangning Jia, Jiaming Chen, Xianmei Chen, Anmin Yin
To characterize fatigue crack, an analytical calculation and finite element (FE) simulation of Lamb wave propagating through the region of a breathing crack in a two-dimensional(2D) isotropic plate were studied. Contact surface boundary conditions between the two surfaces of the vertical crack were considered to study contact acoustic nonlinearity (CAN) from the breathing contact crack in conjunction
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Acoustic field visualisation using local absorption of ultrasound and thermochromic liquid crystals Ultrasonics (IF 4.2) Pub Date : 2024-03-23 O. Trushkevych, M. Turvey, D.R. Billson, R. Watson, D.A. Hutchins, R.S. Edwards
Acoustic field and vibration visualisation is important in a wide range of applications. Laser vibrometry is often used for such visualisation, however, the equipment has a high cost and requires significant user expertise, and the method can be slow, as it requires scanning point by point. Here we suggest a different approach to visualisation of acoustic fields in the kHz – MHz range, using paint-on
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Defect detection in additively manufactured AlSi10Mg and Ti6Al4V samples using laser ultrasonics and phase shift migration Ultrasonics (IF 4.2) Pub Date : 2024-03-22 A. Martinez-Marchese, R. Esmaeilizadeh, E. Toyserkani
Laser ultrasonics (LU) is a non-contact and non-destructive method with a high data acquisition rate, making it a promising candidate for in-situ monitoring of defects in different additive manufacturing (AM) processes, including laser powder bed fusion (LPBF) and directed energy deposition, as well as final part inspection. In order to see the effect of various artificial defect types on an LU sub-surface
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Research on spatial localization method of composite damage under strong noise Ultrasonics (IF 4.2) Pub Date : 2024-03-21 Zhongyan Jin, Qihong Zhou, Zeguang Pei, Ge Chen
In this paper, a damage spatial imaging approach based on novel signal extraction is suggested to reconstruct the Lamb wave response signal under strong noise and realize the spatial localization of damage. First, the Variable Mode Decomposition (VMD) parameters are optimized by the improved Grey Wolf optimization method (IGWO) to decompose the response signal. To rebuild the response signal, the correlation
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Remote control of fluid motion in a channel by acoustic holography Ultrasonics (IF 4.2) Pub Date : 2024-03-20 Behzad Ghavami Namin, Yousef Hojjat
A new method for manipulating fluid movement using sound waves is presented in this paper. The method relies on acoustic streaming near the free surface of the fluid in a channel with an open top. The sound waves are modulated in phase using acoustic phase holography, which creates a periodic phase pattern from 0 to 2π along a straight path on a target plane. The paper also describes an experimental
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An 8 mm endoscopic histotripsy array with integrated high-resolution ultrasound imaging Ultrasonics (IF 4.2) Pub Date : 2024-03-17 Matthew G. Mallay, Thomas G. Landry, Jeremy A. Brown
An 8 mm diameter, image-guided, annular array histotripsy transducer was fabricated and characterized. The array was laser etched on a 5 MHz, 1–3 dice and fill, PZT-5H/epoxy composite with a 45 % volume fraction. Flexible PCBs were used to electrically connect to the array elements using wirebonds. The array was backed with a low acoustic impedance epoxy mixture. A 3.6 by 3.8 mm, 64-element, 30 MHz
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High-spatial-resolution transcranial focused ultrasound neuromodulation using frequency-modulated pattern interference radiation force Ultrasonics (IF 4.2) Pub Date : 2024-03-16 Young Hun Kim, Ki Chang Kang, Jeong Nyeon Kim, Kwan Kyu Park, Kamyar Firouzi, Butrus T. Khuri-Yakub
Stimulating the brain in a precise location is crucial in ultrasound neuromodulation. However, improving the resolution proves a challenge owing to the characteristics of transcranial focused ultrasound. In this paper, we present a new neuromodulation system that overcomes the existing limitations based on an acoustic radiation force with a frequency-modulated waveform and standing waves. By using
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Characterization of the collagen network of human cheek skin using ultrasonic microscopy Ultrasonics (IF 4.2) Pub Date : 2024-03-16 Shiro Mukae, Yuki Ogura, Yusuke Hara
Dermal collagen is the most abundant component of human skin and has a network structure that regulates the mechanical properties of the skin. Therefore, non-invasive characterization of the collagen network would be beneficial for the evaluation of skin conditions. The microscopic substructures of the network, which are individual bundles and fibers, have been optically investigated. However, the
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Efficient testing of weld seam models with radii of curvature in the millimeter range using laser ultrasound Ultrasonics (IF 4.2) Pub Date : 2024-03-16 Markus Saurer, Guenther Paltauf, Robert Nuster
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Damage recovery in composite laminates through deep learning from acoustic scattering of guided waves Ultrasonics (IF 4.2) Pub Date : 2024-03-15 Bernardo Feijó Junqueira, Ricardo Leiderman, Daniel Alves Castello
We propose an innovative deep learning (DL) regression strategy combined with guided wave modes to address inverse acoustic scattering problems effectively. This approach allows for accurate recovery of heterogeneous defect fields at the interfaces of composite laminates. The neural network (NN) model’s training process employs stochastic Gaussian fields as output, which are linked to the interfacial
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Ultrasonic backscattering model for Rayleigh waves in polycrystals with Born and independent scattering approximations Ultrasonics (IF 4.2) Pub Date : 2024-03-14 Shan Li, Ming Huang, Yongfeng Song, Bo Lan, Xiongbing Li
This paper presents theoretical and numerical models for the backscattering of 2D Rayleigh waves in single-phase, untextured polycrystalline materials with statistically equiaxed grains. The theoretical model, based on our prior inclusion-induced Rayleigh wave scattering model and the independent scattering approximation, considers single scattering of Rayleigh-to-Rayleigh (R–R) waves. The numerical
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Meta-structure enhanced second harmonic S0 waves for material microstructural changes monitoring Ultrasonics (IF 4.2) Pub Date : 2024-03-12 Ze Liu, Shengbo Shan, Li Cheng
Cumulative second harmonic Lamb waves in nonlinear media feature increasing amplitudes with propagation distance, conducive to the monitoring of material microstructural changes in structures. The phenomenon can be readily generated by zero-order symmetric (S0) mode waves in the low-frequency range. However, in a practical piezoelectric-transducer-activated system, both S0 and A0 (zero-order antisymmetric)
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A single crystal row–column-array for 3D ultrasound imaging Ultrasonics (IF 4.2) Pub Date : 2024-03-11 Guo Li, Qiandong Sun, Yapeng Fu, Shilin Hou, Jiaming Zhang, K.L. Xu, J.Y. Dai
In vivo 3D ultrasound imaging with 2D-array transducers is of great importance for both clinical application and biomedical research, but it is complicated in fabrication and also very expensive in hardware due to thousands of electronic channels. In this work, we demonstrate a new fabrication process of 7-MHz 128 + 128 elements row-column-array (RCA) transducer with relaxor ferroelectric PMN-0.28PT
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Study of thermal effects induced by the high-frequency probing laser in nonlinear opto-acoustic frequency-mixing technique Ultrasonics (IF 4.2) Pub Date : 2024-03-11 Ling Yuan, Chen-Yin Ni, Yi-Fei Zhang, Hong-Chao Zhang, Zhong-Hua Shen
Photo-thermal modulation-based nonlinear opto-acoustic frequency-mixing technique is an effective method for detecting micro-cracks. When using this technique for micro-crack detection, the selection of laser source parameters is particularly crucial. Compared to traditional piezo-transducer-based mixing techniques, the characteristic of using a laser as the detection source is the presence of thermal
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Energy focusing of broadband Lamb wave by designing excitation waveforms and elastic metamaterials Ultrasonics (IF 4.2) Pub Date : 2024-03-11 Daiyao Du, Jiadong Hua, Chun Cui, Jing Lin
In the field of structure health monitoring (SHM), the use of Lamb wave to locate damage is a common method. Energy focusing is beneficial for damage localization because of higher SNR and higher resolution. Optimization design of elastic metamaterials is promising for energy focusing based on speed modulation. However, current design scheme is effective only for narrowband Lamb waves. Compared to
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Ultrasonic detection method based on flexible capillary water column arrays coupling Ultrasonics (IF 4.2) Pub Date : 2024-03-08 Kai Wang, Yini Song, Yihua Kang, Yizhou Guo, Hongbao Ma, Shengping Wu, Jin Yang
Conventional water immersion ultrasonic testing faces limitations due to factors such as environmental conditions, workpiece dimensions, corrosion, and resource wastage. Contact-based coupling methods, which employ coupling media or specific coupling structures, offer a convenient approach to coupling acoustic waves and reduce signal attenuation. However, these methods are time-sensitive and lack adaptability
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Optoacoustic interferometric characterization system (OPTICS) for the evaluation of fuel quality through speed of sound measurements Ultrasonics (IF 4.2) Pub Date : 2024-03-06 George J. Tserevelakis, Charalampos Astrinakis, Giannis Zacharakis
Ultrasonic techniques have been applied to assess crucial physical parameters in various types of fuels including the speed of sound (SoS), the bulk modulus and the acoustic attenuation coefficient. Such investigations may have important practical significance as the knowledge of fuel properties is directly related to the analysis of combustion characteristics, engine’s overall performance and exhaust
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Ultrasonic liquid level detection method based on the variation of reflected energy on the inner wall of a container Ultrasonics (IF 4.2) Pub Date : 2024-03-06 Tiaotiao Zhang, Xiping He, Yu Liu, Bin Li
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Shear horizontal waves in a multiferroic composite semiconductor structure Ultrasonics (IF 4.2) Pub Date : 2024-03-02 Lei Yang, Enrico Zappino, Erasmo Carrera, Jianke Du
Piezoelectric semiconductors (PSs) possess the physical properties of piezoelectric and semiconductor simultaneously. When a piezomagnetic (PM) material is added to the PS, the composite structures will exhibit the comprehensive mageto-electro-semiconductive (MES) coupling effects. In this paper, the propagation characteristics of shear horizontal (SH) waves in a multiferroic composite semiconductor
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Increasing abdominal aortic aneurysm curvature visibility using 3D dual probe bistatic ultrasound imaging combined with probe translation Ultrasonics (IF 4.2) Pub Date : 2024-03-02 Larissa C. Jansen, Stein Fekkes, Hans-Martin Schwab, Richard G.P. Lopata
High frame rate ultrasound (US) imaging techniques in 3D are promising tools for capturing abdominal aortic aneurysms (AAAs) over time, however, with the limited number of channel-to-element connections current footprints are small, which limits the field of view. Moreover, the maximal steering angle of the ultrasound beams in transmit and the maximal receptance angle in receive are insufficient for
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Simultaneous photoacoustic and ultrasound imaging: A review Ultrasonics (IF 4.2) Pub Date : 2024-02-28 Yinshi Yu, Ting Feng, Haixia Qiu, Ying Gu, Qian Chen, Chao Zuo, Haigang Ma
Photoacoustic imaging (PAI) is an emerging biomedical imaging technique that combines the advantages of optical and ultrasound imaging, enabling the generation of images with both optical resolution and acoustic penetration depth. By leveraging similar signal acquisition and processing methods, the integration of photoacoustic and ultrasound imaging has introduced a novel hybrid imaging modality suitable
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Acoustic shadow zone of the guided wave in a variable thickness plate Ultrasonics (IF 4.2) Pub Date : 2024-02-27 Zhiyuan Zhang, Bing Li, Yanqi Wang
This paper calculates the acoustic shadow zone of the guided wave in a variable thickness plate. The variable thickness plate has a wide range of applications in bridges, ships, etc., and the guided wave is often used for its nondestructive testing. The velocity gradient induced by thickness variations will deflect the guided wave towards lower phase velocities. Both frequency and thickness variation
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Multiple ultrasonic parametric imaging for the detection and monitoring of high-intensity focused ultrasound ablation Ultrasonics (IF 4.2) Pub Date : 2024-02-27 Guang Yang, Jing Liu, Beiru Yang, Junfeng Guo, Chenxiaoyue Wu, Bo Zhang, Siyuan Zhang
Numerous quantitative ultrasound imaging techniques have demonstrated superior monitoring performance for thermal ablation when compared to conventional ultrasonic B-mode imaging. However, the absence of comparative studies involving various quantitative ultrasound imaging techniques hinders further clinical exploration. In this study, we simultaneously reconstructed ultrasonic Nakagami imaging, ultrasonic
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A layer discrete particle based soft contact model in corroded rebar monitoring using linear and nonlinear ultrasonic guided waves Ultrasonics (IF 4.2) Pub Date : 2024-02-20 Shi Yan, Xuenan Wang, Ruifeng Zhu
In offshore reinforced concrete (RC) structures, the phenomenon of rebar corrosion is widespread, seriously threatening the durability of the structures. However, the issue of rebar corrosion detection especially for the early corrosion situation is also challengeable. It is of great significance to use ultrasonic guided waves (UGWs) for monitoring the situation of the rebar corrosion entire process
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Acoustic Source Localization in Composite Plates using sideband peak count – Index Technique Ultrasonics (IF 4.2) Pub Date : 2024-02-19 H. Alnuaimi, U. Amjad, T. Kundu
In this study the Non-Linear Ultrasonic Sideband Peak Count-Index (SPC-I) technique is used as the foundation for anovel approach towards acoustic source localization (ASL) in orthotropic composite plates. The SPC-I based technique proposed here does not require the signal attenuation information or any knowledge on the time of arrival of the signal. It should be noted that since individual sensors
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Modal displacement analyses of Lamb waves in micro/nano-plates based on the consistent couple stress theory Ultrasonics (IF 4.2) Pub Date : 2024-02-18 Hai Huang, Wei Guan, Xiao He
In micro-scale structures, the influence of scale effects on the mechanical properties cannot be ignored, and the continuum mechanics theory cannot effectively describe guided wave propagation. This paper studies modal displacements in an isotropic micro/nano-scale plate — an essential factor for the mode selection of Lamb waves in non-destructive testing technology. To achieve this, the consistent
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Excitation characteristics of circumferential SH guided waves in steel pipes generated by EMATs with few-cycle PPM Ultrasonics (IF 4.2) Pub Date : 2024-02-18 Hongyuan Zhang, Xiaokang Yin, Longhui Ma, Gaofeng Ma, Kunsan Shi, Ziheng Zhang, Xin'an Yuan, Wei Li
Circumferential Shear Horizontal (CSH) guided waves provide an effective method for detecting defects like axial cracks and corrosion in pipes. Periodic Permanent Magnet Electromagnetic Acoustic Transducers (PPM EMATs) are typically used to generate CSH guided waves. However, there is an offset problem to which little attention has been paid. The offset problem refers to the offset of the center (position
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Investigation of fatigue crack closure effect on the evaluation of edge cracks with the fundamental mode of edge waves Ultrasonics (IF 4.2) Pub Date : 2024-02-16 Hankai Zhu, Andrei Kotousov, Ching Tai Ng
Fatigue cracks often initiate and propagate from edges of structural components. Detection and evaluation of edge cracks could be very challenging, specifically, due to the crack closure phenomenon, which makes fatigue cracks to be partially closed when the applied loading is removed; this usually corresponds to maintenance and NDE inspection conditions. Despite that fatigue crack closure is well investigated
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Suppression of the height deviation on metal bumps manufacturing by an ultrasonic vibration control Ultrasonics (IF 4.2) Pub Date : 2024-02-16 Yuming Feng, Yingxiang Liu, Jie Deng, Junkao Liu
On-demand droplet printing based on piezoelectric micro-jet device (PMJD) is considered a flexible and high-precision method to generate metal droplets directly for flip-chip bonding in industrial electronics. However, the quality of flip-chip bonding is closely related to the height deviation of the solidified droplets (the metal bumps), which is influenced by the complicated hydrodynamics of impacting
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Deep learning based ultrasonic reconstruction of rough surface morphology Ultrasonics (IF 4.2) Pub Date : 2024-02-13 Zhengjun Wang, Fan Shi, Fangxin Zou
This paper introduces a methodology to recover the morphology of a complex rough surface from ultrasonic pulse echo measurements with an array of equidistant sensors using the one dimensional convolution neural network (1DCNN). The neural network is trained by the datasets simulated from high-fidelity finite element simulations for surfaces with a range of roughness parameters and is tested on both
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Comparisons of the acoustic radiation force of ultrasonic standing waves in half-wavelength and quarter-wavelength micro-resonators of cylindrical geometry Ultrasonics (IF 4.2) Pub Date : 2024-02-13 In-Hwan Yang, Nahae Kim
Ultrasonic standing waves with specific wavelengths generated in the multi-layered micro-resonators were numerically and experimentally analyzed. Using a three-dimensional scanning fluorescence microscope, the acoustophoretic motion of fluorescent microparticles within the micro-resonators was carefully and accurately measured. The manufactured micro-resonators were validated by comparing the location
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B-mode ultrasound to elastography synthesis using multiscale learning Ultrasonics (IF 4.2) Pub Date : 2024-02-13 Fei Dai, Yifang Li, Yunkai Zhu, Boyi Li, Qinzhen Shi, Yaqing Chen, Dean Ta
Elastography is a promising diagnostic tool that measures the hardness of tissues, and it has been used in clinics for detecting lesion progress, such as benign and malignant tumors. However, due to the high cost of examination and limited availability of elastic ultrasound devices, elastography is not widely used in primary medical facilities in rural areas. To address this issue, a deep learning
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Characterization of three-dimensional surface-breaking slots based on regression analysis of ultrasonic Rayleigh wave simulations Ultrasonics (IF 4.2) Pub Date : 2024-02-10 Shengyuan Zhang, Zheng Fan
Rayleigh waves travel along the surface of a solid structure, with most of their energy focusing within a depth of one wavelength. Thus, the reflection coefficient from a surface-breaking crack is highly sensitive to the ratio between the crack depth and the wavelength. It is possible to characterize the depth of surface-breaking cracks by measuring the features in the reflected waves. However, a feature
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The impact of ischemic vascular stenosis on LIPU hyperthermia efficacy investigated Based on in vivo rabbit limb ischemia model Ultrasonics (IF 4.2) Pub Date : 2024-02-10 Chunbing Zhang, Yiyun Wu, Qi Zhang, Meimei Zhang, Dong Zhang
Ischemic diseases due to arterial stenosis or occlusion are common and can have serious consequences if untreated. Therapeutic ultrasound like high-intensity focused ultrasound (HIFU) ablates tissues while low-intensity pulsed ultrasound (LIPU) promotes healing at relatively low temperatures. However, blood vessel cooling effect and reduced flow in ischemia impact temperature distribution and ultrasonic
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Full instantaneous de-icing using extensional modes: The role of architectured and multilayered materials in modes decoupling Ultrasonics (IF 4.2) Pub Date : 2024-02-09 G. Gastaldo, M. Budinger, Y. Rafik, V. Pommier-Budinger, V. Palanque, A. Yaich
Ultrasonic de-icing systems are energy-efficient solutions for ice protection. The systems generate high levels of stress in the ice by inducing vibrations in the substrate, resulting in bulk or adhesive ice failure and, ultimately, ice removal. For this purpose, two types of resonant modes can be excited: flexural and extensional modes. The extensional modes have the interesting ability to de-ice
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A novel waveguide rod with acoustic black hole for acoustic emission signal enhancement and its performance Ultrasonics (IF 4.2) Pub Date : 2024-02-09 Ji Fu, Tian He, Zhenyu Liu, Yue Bao, Xiandong Liu
As an essential auxiliary tool for acoustic emission (AE) detection, waveguide rods are widely used in testing situations where sensors cannot contact the specimens directly, such as high temperature, cryogenic, corrosion, radiation, etc. However, the AE signal attenuation in waveguide rod makes the risk of missing weak acoustic emission events in damage detection, which limits the application of waveguide
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Numerical modeling with experimental verification investigating the effect of various nonlinearities on the sideband peak count-index technique Ultrasonics (IF 4.2) Pub Date : 2024-02-07 Guangdong Zhang, Bo Hu, Hamad Alnuaimi, Umar Amjad, Tribikram Kundu
A newly developed nonlinear ultrasonic (NLU) technique called sideband band peak count-index (or SPC-I) measures the degree of nonlinearity in materials by counting the sideband peaks above a moving threshold line – larger the SPC-I values, higher is the material nonlinearity. In various published papers, the SPC-I technique has shown its effectiveness in structural health monitoring (SHM) applications
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Transcranial ultrasound estimation of viscoelasticity and fluidity in brain tumors aided by transcranial shear waves Ultrasonics (IF 4.2) Pub Date : 2024-02-06 Jianjun Yu, Hao Guo, Xiaoyang Qiao, Liyuan Jiang, Yiran Chen, Jiacheng Liu, Chaoyang Zhang, Xiao Su, Hongmei Zhang, Mingxi Wan
Cerebral diseases, such as brain tumors, are intricately linked to the mechanical properties of brain tissues. Estimating the mechanical properties of brain tumors using transcranial ultrasound is a promising approach. However, the complexity of cranial features introduces challenges, such as ultrasound attenuation and interference from multidirectional transcranial shear waves induced by impact vibrations
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A novel 3D evaluation method for surface defects using broadband laser-generated Rayleigh waves with wavenumber analysis Ultrasonics (IF 4.2) Pub Date : 2024-02-05 Qichao Cheng, Jun He, Shixi Yang, Xin Xiong, Yongshui Luo
To address the issues of large imaging errors for small defects and the difficulty in depth evaluation using local wavenumber estimation for surface defect imaging, a novel three-dimensional (3D) evaluation method for surface defects using broadband laser-generated Rayleigh waves with wavenumber analysis is proposed. A finite element model is established to investigate the interaction between the Rayleigh
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Ultrasound k-nearest neighbor entropy imaging: Theory, algorithm, and applications Ultrasonics (IF 4.2) Pub Date : 2024-02-02 Sinan Li, Po-Hsiang Tsui, Weiwei Wu, Shuicai Wu, Zhuhuang Zhou
Ultrasound information entropy is a flexible approach for analyzing ultrasound backscattering. Shannon entropy imaging based on probability distribution histograms (PDHs) has been implemented as a promising method for tissue characterization and diagnosis. However, the bin number affects the stability of entropy estimation. In this study, we introduced the -nearest neighbor (KNN) algorithm to estimate
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Can Mn:PIN-PMN-PT piezocrystal replace hard piezoceramic in power ultrasonic devices? Ultrasonics (IF 4.2) Pub Date : 2024-02-02 Xuan Li, Nicola Giuseppe Fenu, Nathan Giles-Donovan, Sandy Cochran, Margaret Lucas
Mn:PIN-PMN-PT piezocrystal is investigated to determine whether its enhanced energy density makes it a candidate transducer material for power ultrasonics applications. To this end, the electromechanical and vibrational characteristics of a simple configuration of a bolted Langevin transducer (BLT) and then an ultrasonic surgical device, both incorporating Mn:PIN-PMN-PT piezocrystal, are compared with
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Convolutional neural network and level-set spectral element method for ultrasonic imaging of delamination cavities in an anisotropic composite structure Ultrasonics (IF 4.2) Pub Date : 2024-01-30 Boyoung Kim, Shashwat Maharjan, Fazle Mahdi Pranto, Bruno Guidio, Christoph Schaal, Chanseok Jeong
We present a computational approach that incorporates a convolutional neural network (CNN) for detecting internal delamination in a layered 2D plane-strain anisotropic composite structure of transient elastodynamic fields. The two-dimensional spectral element method (SEM) is utilized to simulate the propagation of elastic waves in an orthotropic solid sandwiched by isotropic solids and their interaction
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Deep learning for real-time multi-class segmentation of artefacts in lung ultrasound Ultrasonics (IF 4.2) Pub Date : 2024-01-29 Lewis Howell, Nicola Ingram, Roger Lapham, Adam Morrell, James R. McLaughlan
Lung ultrasound (LUS) has emerged as a safe and cost-effective modality for assessing lung health, particularly during the COVID-19 pandemic. However, interpreting LUS images remains challenging due to its reliance on artefacts, leading to operator variability and limiting its practical uptake. To address this, we propose a deep learning pipeline for multi-class segmentation of objects (ribs, pleural
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Ultrasonic imaging of delamination in thick CFRP laminates using an energy-compensation reverse time migration method Ultrasonics (IF 4.2) Pub Date : 2024-01-28 Hongjuan Yang, Zhengyan Yang, Sitong Lu, Yinan Shan, Jitong Ma, Lei Yang, Zhanjun Wu
In ultrasonic reflection method, the precision of defect detection in thick carbon fiber reinforced plastics (CFRP) is compromised by acoustic energy attenuation. An energy-compensation reverse time migration (ECRTM) method is proposed to identify multiple defects accurately. Forward and backward wavefields are formed using the finite element method within an anisotropic acoustic model based on the
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Piezoelectric-laser ultrasonic inspection and monitoring of thin-walled structure fabricated by directed energy deposition process based on guided waves Ultrasonics (IF 4.2) Pub Date : 2024-01-28 Fuzhen Wen, Shiming Gao, Xu Song, Fan Shi
Thin-walled metallic structures produced by the Directed Energy Deposition (DED) Additive Manufacturing (AM) process are prone to various fabrication defects, which hinder the wider applications of the technique in practice. In-situ inspection and monitoring methodologies are in high demand for improved quality control of printed parts. This paper presents an ultrasonic guided-wave-based method and
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Generation of time-independent torque by ultrasonic guided waves Ultrasonics (IF 4.2) Pub Date : 2024-01-24 I.A. Nedospasov, P.D. Pupyrev, A. Sotnikov, H. Schmidt, M. Weihnacht, A.P. Mayer
The excitation of acoustic waves by a unidirectional transducer, integrated in a piezoelectric cylindrical tube or disk, can lead to a time-independent torque. This phenomenon, demonstrated earlier in experiments and analyzed with coupling-of mode theory, is explained in detail, starting on the level of lattice dynamics of a piezoelectric crystal. Expressions are derived for the stationary torque in
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Finite element modelling strategy for determining directivity of thermoelastically generated laser ultrasound Ultrasonics (IF 4.2) Pub Date : 2024-01-24 Xin L. Tu, Jie Zhang, Alberto M. Gambaruto, Paul D. Wilcox
Laser ultrasound (LU) is a contactless and couplant-free remote non-destructive (NDE) technique, which uses lasers for ultrasonic generation and detection rather than conventional piezoelectric transducers. For a transducer, an important characteristic is the directivity, the angle-dependent amplitude of the ultrasonic waves generated in the material. In the non-destructive thermoelastic regime, LU
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Detection and localization of corrosion using the combination information of multiple Lamb wave modes Ultrasonics (IF 4.2) Pub Date : 2024-01-19 Liping Huang, Zhi Luo, Liang Zeng, Jing Lin
Themulti-modeanddispersionnature of Lamb waves means that a variety of modes with individual mode structures and distinct dispersion behaviors would propagate in the structures simultaneously. The existence of a corrosion would result in thickness reduction, which means the frequency-thickness product under a specific excitation would also decrease. Due to dispersion diversity, the interaction of each
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Multi-mode coupled vibration analysis and radiation sound field investigation of a novel multidirectional piezoelectric ultrasonic transducer Ultrasonics (IF 4.2) Pub Date : 2024-01-18 Cheng Chen, Jianzhong Guo, Shuyu Lin
Nowadays, expanding the operating range and realizing multifrequency operation have emerged as focal and imperative objectives in the design of ultrasonic transducers. Due to the limitations of structure and radial sizes, conventional Langevin transducers encounter challenges in meeting the increasingly stringent requirements across diverse ultrasonic applications. Hence, this paper proposes a multidirectional
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In-situ sparse-array imaging for through-thickness cracks in plates with [formula omitted] Lamb waves and an efficient waveform inversion algorithm Ultrasonics (IF 4.2) Pub Date : 2024-01-17 Shengyuan Zhang, Jinglei Yang, Wenjing Ye
Structural health monitoring (SHM) requires efficient online crack detection and characterization to prevent structural failures, which mainly arise from fatigue cracks. Existing solutions for crack characterization involve analyzing sensed wave signals directly, but these approaches usually require onerous steps or many sensors to obtain sufficient and clear wave packets. An alternative strategy is
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Investigating the flexural behavior of nanomodified multi-delaminated composites using acoustic emission technique Ultrasonics (IF 4.2) Pub Date : 2024-01-17 Sajad Alimirzaei, Reza Barbaz-Isfahani, Arash Khodaei, Mehdi Ahmadi Najafabadi, Mojtaba Sadighi
The formation of multiple delaminations is a frequently observed damage mechanism in composite materials, exerting a more pronounced influence on their strength properties compared to single delaminations. To tackle this issue, the incorporation of nanoparticles has been investigated as a means to enhance composite materials. This study aims to examine the effects of nano-additives, specifically carbon
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Noninvasive assessment of pressure distribution and fractional flow in middle cerebral artery using microbubbles and plane wave in vitro Ultrasonics (IF 4.2) Pub Date : 2024-01-14 Xiaoyang Qiao, Ruiyan Zhang, Jianjun Yu, Yadi Yan, Ayache Bouakaz, Xiao Su, Jiacheng Liu, Yujin Zong, Mingxi Wan
Fractional flow has been proposed for quantifying the degree of functional stenosis in cerebral arteries. Herein, subharmonic aided pressure estimation (SHAPE) combined with plane wave (PW) transmission was employed to noninvasively estimate the pressure distribution and fractional flow in the middle cerebral artery (MCA) in vitro. Consequently, the effects of incident sound pressure (peak negative