Ultrasonics最新文献

{"title":"Measurement of dynamic stress using linear and nonlinear acoustoelastic effects due to colinear wave mixing","authors":"Tianyi Wang ,&nbsp;Ching Tai Ng ,&nbsp;Andrei Kotousov","doi":"10.1016/j.ultras.2025.107801","DOIUrl":"10.1016/j.ultras.2025.107801","url":null,"abstract":"<div><div>This paper investigates a new method to evaluate dynamic stress in plate or shell-like components due to propagation of elastic waves. The proposed method is based on collinear mixing of the stress wave with a high frequency (probe) wave, which is excited in the ultrasonic frequency range. The wave interactions generate linear and nonlinear responses such as the changes of the group velocity of the probe wave and generation of higher-order harmonics, respectively. A three-dimensional finite element (FE) model is developed to investigate and link these changes to the magnitude of the dynamic stress excited by the elastic waves. In the current work two S₀ Lamb wave modes at relatively low and high frequences were utilised to demonstrate the proposed method, which can be extended to the measurement of dynamic stress generated by different elastic wave modes or vibrations. The numerical results have been validated by an experimental study confirming that the nonlinear effects are much more sensitive to the induced dynamic stress rather than the corresponding linear changes of the wave velocities. In addition, two parametric studies are conducted using the experimentally verified FE model. These studies are focused on the effects associated with the stress variation in the mixed region and the wavelength ratio of the probe wave to the pump waves on the dynamic stress evaluation with the proposed method.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"157 ","pages":"Article 107801"},"PeriodicalIF":4.1,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144921455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The use of alendronate to enhance transcranial transmission of focused ultrasound for successful ablations in brain","authors":"G. Sakharova ,&nbsp;A. Krokhmal ,&nbsp;R. Galimova ,&nbsp;A. Khatmullina ,&nbsp;D. Nabiullina ,&nbsp;I. Buzaev ,&nbsp;D. Avzaletdinova ,&nbsp;D. Chupova ,&nbsp;V. Khokhlova","doi":"10.1016/j.ultras.2025.107796","DOIUrl":"10.1016/j.ultras.2025.107796","url":null,"abstract":"<div><h3>Objective:</h3><div>The aim of this study was to evaluate the efficacy of alendronate therapy in improving bone density distribution in skull bones and corresponding ultrasound permeability in patients who had previously experienced unsuccessful transcranial MR-guided focused ultrasound (MRgFUS) ablation. The ability of alendronate treatment to modify skull bone characteristics and enhance the success rate of repeat MRgFUS procedures was assessed.</div></div><div><h3>Methods:</h3><div>Five patients with initially unsuccessful MRgFUS ablations underwent a 6–12 month regimen of alendronate to improve bone density. Repeat MRgFUS procedures were performed, and changes in skull density ratio (SDR) and peak focal temperatures were evaluated statistically using CT and MR imaging. Histograms of skull bone density were introduced and analysed as an additional metric.</div></div><div><h3>Results:</h3><div>After therapy, SDR increased in four out of five patients (from 0.378±0.037 to 0.424±0.045, <span><math><mrow><mi>p</mi><mo>&gt;</mo><mn>0</mn><mo>.</mo><mn>05</mn></mrow></math></span>). All repeated procedures were successful. The maximum focal temperature, averaged over sonications, increased from 53.6±4.0 °C to 55.7±4.1 °C (p=0.018), while the maximum temperature per patient rose from 57.0±2.4 °C to 60.2±1.8 °C (p=0.031). Histograms of CT scans showed a reduction in low-density voxels, indicating trabecular bone densification. 3D CT scan registration revealed local density changes, defect filling, and void reduction.</div></div><div><h3>Conclusions:</h3><div>Alendronate therapy enhanced skull bone density distribution and thus ultrasound permeability, which has facilitated successful repeat MRgFUS. By visually analysing CT changes, healthcare professionals can better inform their decision-making regarding repeat surgeries. This method broadens the pool of patients with low SDR eligible for MRgFUS treatment and underscores the potential benefits of alendronate in improving treatment outcomes.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"157 ","pages":"Article 107796"},"PeriodicalIF":4.1,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144886074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Wavelet scattering transformation for sub-surface damage detection and localization in PZT sensor","authors":"Abhinav P.T. ,&nbsp;Shivam Ojha ,&nbsp;Azeem Ahmad ,&nbsp;Anowarul Habib","doi":"10.1016/j.ultras.2025.107793","DOIUrl":"10.1016/j.ultras.2025.107793","url":null,"abstract":"<div><div>Structural Health Monitoring (SHM) systems typically employ piezoelectric sensors for the monitoring of variations in structural members. However, subsurface deterioration or damage within the sensors can impair the system’s overall reliability and precision. This drawback can be addressed using a suggested reference-free detection method and subsurface defect localization for Lead zirconate titanate (PZT) sensor defects, combining signal processing and machine-learning-based feature extraction techniques. Ultrasonic wave interactions with the PZT material are measured experimentally by a Coulomb coupling-based excitation scheme, resulting in high-resolution but noisy wavefield images. An advanced Block-Matching 3D (BM3D) filtering algorithm is employed to enhance data quality, which can filter out noise while preserving essential structural details. These denoised images are then processed using the Wavelet Scattering Transform (WST), resulting in stable, hierarchical, and translation-invariant representations of the acoustic patterns embedded within. Critically, the technique enables unsupervised detection of defects — no reference signal from an undamaged sensor is needed — by identifying spatial anomalies that break the expected symmetry of the material. This approach not only correctly locates subsurface anomalies but also assists with sensor self-diagnostics, delivering a strong, interpretable, and non-invasive solution for increasing SHM reliability.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"157 ","pages":"Article 107793"},"PeriodicalIF":4.1,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144878313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-mode dispersion compensation in Lamb wave time-reversal method for high damage sensitivity across frequencies","authors":"Souvik Jana,&nbsp;Santosh Kapuria","doi":"10.1016/j.ultras.2025.107795","DOIUrl":"10.1016/j.ultras.2025.107795","url":null,"abstract":"<div><div>The time-reversal method (TRM) for Lamb wave-based damage detection faces challenges due to amplitude dispersion, which prevents achieving a zero damage index (DI) for undamaged structures. Additionally, the healthy state DI varies with input excitation frequency, which complicates establishing a consistent DI threshold, and a high threshold diminishes its sensitivity to damage. This article proposes a novel technique that eliminates amplitude dispersion in the main mode of the reconstructed signal after the time-reversal process, enabling a near-zero DI threshold. The method involves dividing the transfer function of the reconstructed signal by the main mode transfer function (MTF) of a path with the least DI, representing the healthy state. The MTF is determined directly from the forward response measured under a broadband excitation. The unique property of this function’s independence from sensing path length allows for application in networks of multiple sensing paths with varying lengths for damage localization in isotropic structures. The DI is calculated using an extended signal length that captures the extra modes induced by damage, further enhancing sensitivity. Numerical and experimental studies demonstrate the effectiveness of the proposed dispersion-compensated TRM in detecting and sizing different damage types, such as notch-type and block-mass damage, both on and away from the sensing path. Results show a significant improvement in damage sensitivity across all excitation frequencies, eliminating a major limitation of TRM in structural health monitoring.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"157 ","pages":"Article 107795"},"PeriodicalIF":4.1,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144886073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Regularizing the inverse problem of ultrasound beamforming with non-local structure tensor total variation","authors":"Zhiyuan Li ,&nbsp;Hervé Liebgott ,&nbsp;Yue Zhao ,&nbsp;François Varray","doi":"10.1016/j.ultras.2025.107788","DOIUrl":"10.1016/j.ultras.2025.107788","url":null,"abstract":"<div><div>Researchers are increasingly interested in using inverse problem methodologies for ultrasound image reconstruction instead of conventional beamforming methods, termed the inverse problem of ultrasound beamforming (IPB). This new imaging method promises to increase the frame rate of plane-wave imaging by enabling the reconstruction of high-quality images from fewer plane-wave transmissions compared to conventional beamforming methods. IPB assumes that the RF signals received by the ultrasound probe are linearly related to the beamformed image. In addition to the standard data fidelity term of the inverse problem, a regularization term has to be defined to consider the underlying image’s prior information. Its purpose is to alleviate the ill-posed problem and improve the image quality. Herein, the non-local structure tensor total variation is introduced into IPB (IPB-NLSTV) as the regularization term to exploit the image’s local structure and non-local self-similarity properties for the reconstructed complex ultrasound image. The performance of our method is also investigated by utilizing the datasets provided by the plane-wave imaging challenge in medical ultrasound (PICMUS). In addition, an extensive comparison with the commonly used regularization functions in IPB is also presented. The results demonstrate that our method can obtain better image quality in contrast and resolution than other IPB methods. Our proposed method can reach a spatial resolution of 0.34 mm full-width at half-maximum, a contrast-to-noise ratio (CNR) of 18.32 dB, contrast ratio (CR) of 1.99 and generalized CNR (gCNR) of 1.00 for simulation datasets, and 0.47 mm full-width at half-maximum, a CNR of 15.45 dB, CR of 1.96 and gCNR of 0.97 for experimental datasets using a single plane wave. In particular, our method can preserve the structural details of the reconstructed image, which paves the way for accurately extracting the structural information of the ultrasound image.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"157 ","pages":"Article 107788"},"PeriodicalIF":4.1,"publicationDate":"2025-08-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144863998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bond quality assessment of CFRP lap joints using shear guided waves cutoff frequency","authors":"Yao Xu ,&nbsp;Chongcong Tao ,&nbsp;Hongli Ji ,&nbsp;Jinhao Qiu ,&nbsp;Zheng Fan","doi":"10.1016/j.ultras.2025.107794","DOIUrl":"10.1016/j.ultras.2025.107794","url":null,"abstract":"<div><div>Ensuring the integrity of carbon fiber reinforced polymer (CFRP) bonded structures is critical due to their widespread use in aerospace and other high-performance industries. However, inspecting the bondline in these structures remains a significant challenge due to the anisotropic nature of CFRP and the complexity of its bonding interfaces. Conventional guided waves-based inspection techniques, typically developed for isotropic materials, often fail to reliably indicate bond quality. To address this limitation, we propose a novel nondestructive assessment method based on the cutoff frequency of first-order shear guided waves, which are highly sensitive to variations in interfacial bonding. Our analysis confirms that, in anisotropic material, the cutoff frequency is independent of propagation direction, making it a stable and reliable detection parameter. A finite element model is developed to simulate wave propagation in bonded structures and to examine the relationship between bond quality and cutoff frequency. Experimental validation demonstrates that as bond quality deteriorates, the cutoff frequency decreases, highlighting its potential as a quantitative and robust metric for bond evaluation.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"157 ","pages":"Article 107794"},"PeriodicalIF":4.1,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144863997","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"High-resolution 3-D characterization and detection of subsurface defects in metal additive manufacturing using laser ultrasonic","authors":"Zhenlong Zhang ,&nbsp;Yifan Zhang ,&nbsp;Fei Gao ,&nbsp;Xingcheng Du ,&nbsp;Lei Chen ,&nbsp;Bing Li","doi":"10.1016/j.ultras.2025.107797","DOIUrl":"10.1016/j.ultras.2025.107797","url":null,"abstract":"<div><div>With the advancement of metal additive manufacturing, components fabricated by this technique are being increasingly adopted across various industries. However, due to the influence of fabrication parameters, components tend to develop defects during the manufacturing process. Timely detection of defects in the heat-affected zone (the subsurface region) is crucial, as process parameters can be adjusted and reprocessing can be performed to eliminate such defects. As a non-contact, high-resolution technique, laser ultrasonic offers a powerful tool for defect detection in manufacturing processes. In this study, laser ultrasonic was employed to perform off-line detection of subsurface defects in additively manufactured specimens. Three sub-millimeter horizontal blind holes were fabricated at a depth of 1 mm below the surface of laser powder bed fusion manufactured TI-6AL-4 V specimens to simulate typical subsurface defects. The total focusing method was utilized for high-resolution planar imaging of the defects, while an optimized elliptical localization method was applied for accurate defect localization and sizing in the depth direction. By integrating the results from these two methods, 3-D mapping and reconstruction of the defects were achieved, enabling high-precision characterization of sub-surface defects.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"157 ","pages":"Article 107797"},"PeriodicalIF":4.1,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144886072","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimizing delamination imaging via full wavefield segmentation using augmented simulated wavefield data","authors":"Yitian Yan ,&nbsp;Kang Yang ,&nbsp;Jing Sun ,&nbsp;Zhifeng Tang ,&nbsp;Fuzai Lv ,&nbsp;Zhoumo Zeng ,&nbsp;Yang Liu","doi":"10.1016/j.ultras.2025.107789","DOIUrl":"10.1016/j.ultras.2025.107789","url":null,"abstract":"<div><div>To avoid catastrophic structural failures resulting from the hidden accumulation of delamination in carbon-fiber reinforced polymer, timely and accurate detection is crucial. Several deep learning-based methods have been developed for full wavefield segmentation to image delamination. However, the cost of experimentally acquiring extensive damage scenarios for dataset construction is prohibitively high. In addition, accurately segmenting delamination remains challenging due to the complex superposition of guided wave components in the full wavefield. This paper proposes a data preprocessing strategy that combines wavenumber filtering with a hybrid noise-flipping augmentation, to enhance the performance of deep learning models in full wavefield segmentation for delamination imaging. By isolating the derived guided wave modes introduced by delamination in the frequency domain, the deep learning models are guided to concentrate more effectively on delamination-relevant features. Noise augmentation and flipping augmentation are employed to improve the generalization of the delamination imaging models, enabling them to better handle real-world measurement conditions, which may include various external interference factors such as structural vibration and transducer noise. Seven distinct deep learning models were employed and evaluated in both simulated and experimental settings to examine the effectiveness of the data preprocessing strategy. The results demonstrate that models trained solely on simulated data can be effectively applied to experimental measurements, achieving a highest intersection over union score of 0.8634 and producing artifact-free delamination imaging.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"157 ","pages":"Article 107789"},"PeriodicalIF":4.1,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144858451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Ultrasonic imaging of spherical solids embedded in ice.","authors":"Francesco Simonetti","doi":"10.1016/j.ultras.2025.107779","DOIUrl":"https://doi.org/10.1016/j.ultras.2025.107779","url":null,"abstract":"<p><p>The transmission of compressional ultrasonic waves into a rigid and dense solid with a doubly-curved surface is impeded when the solid is placed in a liquid medium and its surface is irradiated with waves traveling through the liquid. Measurable power transmission is only possible when the incident ultrasonic beam is close to normal to the surface. This condition is difficult to realize when the waves are excited and detected by a linear array of transducers and limits the possibility of forming cross-sectional images of the solid from the array data. Here, it is shown that the interior of the solid can be imaged with enhanced fidelity if the water is frozen. The high speed of compressional waves in polycrystalline ice (approximately 4000 ms^-1) along with its rigid behavior ensure that ultrasonic waves can be transmitted through the surface over a broad range of angles of incidence. However, due to the double curvature, the rays that form the ultrasonic beam can be deflected outside the array azimuthal plane after entering the solid. Therefore, the two-dimensional images obtained from the linear array data may not be consistent with the fully three-dimensional structure of the ray paths. The analysis of this phenomenon for the special case of solid spheres reveals that the image, to a good approximation, corresponds to a section of the sphere that is parallel to the azimuthal plane and at a standoff distance from it. The distance increases with the angle that the normal to the surface forms relative to the azimuthal plane while it decreases as the velocity contrast between ice and the material of the sphere decreases. While this property is not expected to hold for more complex surfaces, the ray-based framework used in this study is applicable to more general surface configurations and can be used to correlate the images to the structure of the solid. These findings are relevant to the inspection of metallic components with complex geometry which represents a long-standing challenge in the field of nondestructive testing.</p>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"157 ","pages":"107779"},"PeriodicalIF":4.1,"publicationDate":"2025-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144822733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Focused sound generation using configurable holographic acoustic admittance panels","authors":"Sungjun Park,&nbsp;Jedo Kim","doi":"10.1016/j.ultras.2025.107790","DOIUrl":"10.1016/j.ultras.2025.107790","url":null,"abstract":"<div><div>In this study, we design and demonstrate a novel adjustable acoustic flat lens by assembling three beamforming holographic admittance acoustic metasurface panels. Each admittance panel is constructed using variable-depth square grooves arranged in a square lattice. We provide a detailed design methodology for the acoustic metasurface panels, highlighting the key parameters used. Both numerical simulations and experimental results are presented to verify acoustic focusing at 30 kHz. The results indicate that, by using the acoustic lens formed by three panels radiating at an angle of 45 degrees, the acoustic pressure can be amplified by up to three times compared to the case without the lens. Furthermore, we demonstrate that the lens concept presented here can easily adjust the focal length and focal point by dynamic variations of the geometric parameters. We also show that optimal amplification, up to four times greater than without the lens, can be achieved through numerical predictions based on effective material parameters. This research underscores the versatility of acoustic metasurfaces in manipulating sound waves and suggests avenues for further enhancement of acoustic lens efficiency.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"157 ","pages":"Article 107790"},"PeriodicalIF":4.1,"publicationDate":"2025-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144840843","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}