Ultrasonics最新文献

{"title":"Assessment of interfacial properties in a two-layered plate using quasi-static component generation during primary Lamb wave propagation","authors":"Han Chen ,&nbsp;Caibin Xu ,&nbsp;Guangjian Gao ,&nbsp;Yan Chen ,&nbsp;Yunshan Bai ,&nbsp;Mingxi Deng","doi":"10.1016/j.ultras.2025.107567","DOIUrl":"10.1016/j.ultras.2025.107567","url":null,"abstract":"<div><div>This study delves into the feasibility of leveraging quasi-static component (QSC) generation during primary Lamb wave propagation to discern subtle alterations in the interfacial properties of a two-layered plate. Unlike the second-harmonic generation of Lamb waves, QSC generation doesn’t necessitate precise phase-velocity matching but rather requires an approximate matching of group velocities to ensure the emergence of cumulative growth effects. This unique characteristic empowers the QSC-based nonlinear ultrasonic method to effectively surmount the limitations associated with inherent dispersion and multimode traits of Lamb wave propagation. Modeling the QSC generation reveals that the integrated amplitude of the QSC pulse, derived from the propagation of the primary Lamb wave tone burst, progressively amplifies with increasing propagation distance. Finite element simulations illustrate an overall decline in the efficiency of QSC generation amidst interfacial degradation. Experimental outcomes obtained via a nonlinear ultrasonic measurement-based setup vividly showcase the cumulative growth effect of QSC generation, evident with the propagation distance under approximate group velocity matching. To substantiate the influence of interfacial properties on QSC generation efficiency, varying thermal fatigue durations under cyclic temperature conditions are employed to simulate subtle changes in the two-layered plate’s interfacial properties. The relative nonlinear acoustic parameter exhibits a distinctly sensitive and monotonically decreasing behavior with escalating thermal fatigue durations, corroborating the impact of alterations in interfacial properties on QSC generation efficiency. The alignment between experimental findings and numerical analysis predictions suggests that the effect of QSC generation in primary Lamb wave propagation provides a promising means for sensitively assessing the early-stage degradation of interfacial properties in layered plates.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"148 ","pages":"Article 107567"},"PeriodicalIF":3.8,"publicationDate":"2025-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142972366","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":"Focal volume reduction in transcranial focused ultrasound using spherical wave expansions","authors":"Fei Shen ,&nbsp;Fan Fan ,&nbsp;Fengji Li ,&nbsp;Yue Wang ,&nbsp;Eleanor Martin ,&nbsp;Haijun Niu","doi":"10.1016/j.ultras.2025.107564","DOIUrl":"10.1016/j.ultras.2025.107564","url":null,"abstract":"<div><div>Transcranial focused ultrasound (tFUS) has been gaining increased attention as a non-invasive modality for treating brain diseases. However, accurately focusing on brain structures remains a challenge as the ultrasound is severely distorted by the presence of the skull. In this article, we propose a promising distortion correction method based on spherical wave expansions. It is demonstrated that the focal gain is directly related to the zero-order spherical harmonic coefficient, and suppressing higher-order coefficients significantly reduces the focal volume. Simulation results show that this method can correct distortion and effectively balance focal gain and volume, achieving a smaller focal spot with lower grating lobes compared to the commonly used time reversal technique. We also verified the capability of shifting the focal position in real time without additional simulations. This work provides an effective approach for tFUS treatments, offering enhanced precision and reduced focal volume.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"148 ","pages":"Article 107564"},"PeriodicalIF":3.8,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142972367","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":"Ultrasound modulation of melatonin release from pineal glands in vitro","authors":"Alexis Carmine ,&nbsp;Bridget Thorpe ,&nbsp;Mallory Brayer ,&nbsp;Karun Sharma ,&nbsp;Aleksandar Jeremic ,&nbsp;Vesna Zderic","doi":"10.1016/j.ultras.2025.107565","DOIUrl":"10.1016/j.ultras.2025.107565","url":null,"abstract":"<div><h3>Objectives</h3><div>In this study, we aim to investigate whether therapeutic ultrasound can modulate the release of melatonin from the pineal gland—either increasing or decreasing its levels—and to assess the safety of this technique. This research could address a significant clinical need by providing a noninvasive method to potentially regulate sleep and circadian rhythms through the targeted modulation of melatonin.</div></div><div><h3>Methods</h3><div>Rat pineal glands were placed in a well with a Krebs Ringer Buffer solution.</div><div>Ultrasound was applied to the glands using unfocused transducers set at an average intensity of 1 W/cm² and three different frequencies (400, 600, and 800 kHz) with continuous exposure for 5 min. Fluid samples were collected from the well before (t = 0 min), immediately after (t = 5 min), and 30 min post-ultrasound treatment (t = 30 min). Melatonin release was subsequently measured using an ELISA kit and analyzed statistically. In addition, histological analysis was completed to determine any structural abnormalities due to ultrasound application.</div></div><div><h3>Results</h3><div>In the 600 kHz group there was a statistically significant decrease from t = 0 min to t = 5 min. No other statistically significant differences were observed. In addition, no histological changes were observed in the pineal glands due to ultrasound application.</div></div><div><h3>Conclusions</h3><div>This study indicated that ultrasound may be able to modulate melatonin release, however follow-up studies are necessary to determine optimal ultrasound parameters for this application.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"148 ","pages":"Article 107565"},"PeriodicalIF":3.8,"publicationDate":"2025-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143093968","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":"Guided wave tomography of pipe bends based on full waveform inversion","authors":"Carlos-Omar Rasgado-Moreno ,&nbsp;Marek Rist ,&nbsp;Raul Land ,&nbsp;Madis Ratassepp","doi":"10.1016/j.ultras.2024.107560","DOIUrl":"10.1016/j.ultras.2024.107560","url":null,"abstract":"<div><div>Pipe bends are recognized as critical areas susceptible to wall thinning, a phenomenon instigated by abrupt changes in the fluid flow direction and velocity. Conventional monitoring techniques for bends typically depend on localized ultrasonic measurements of thickness. While these methods are effective, they can be time-consuming compared to the use of permanently installed transducers, a strategy employed in guided wave tomography (GWT). GWT provides the advantage of identifying and quantifying damage within a specified area by processing waves that are both generated and received by a set of transducers. In this study, we implement a GWT method based on full waveform inversion (FWI) for a high-resolution thickness reconstruction of a steel pipe bend. The wavefield in the bend section, made artificially anisotropic, is modeled using Thomsen parameters in the two-dimensional domain. This enhances its integration with the FWI algorithm. A numerical investigation was conducted to evaluate the efficacy of FWI in the presence of a defect as a function of its circumferential position. Additionally, an experimental evaluation was performed to reconstruct a defect artificially created on a pipe bend with a diameter (d) of 220 mm and a bend radius of 1.5d, and a defect with a diameter of 100 mm and a depth of 47%. The results indicate that the FWI method can effectively reconstruct the thickness map of smooth defects, regardless of their location, and it is particularly effective for defects situated closer to the extrados position.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"148 ","pages":"Article 107560"},"PeriodicalIF":3.8,"publicationDate":"2025-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142955516","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":"Overfit detection method for deep neural networks trained to beamform ultrasound images","authors":"Jiaxin Zhang ,&nbsp;Muyinatu A. Lediju Bell","doi":"10.1016/j.ultras.2024.107562","DOIUrl":"10.1016/j.ultras.2024.107562","url":null,"abstract":"<div><div>Deep neural networks (DNNs) have remarkable potential to reconstruct ultrasound images. However, this promise can suffer from overfitting to training data, which is typically detected via loss function monitoring during an otherwise time-consuming training process or via access to new sources of test data. We present a method to detect overfitting with associated evaluation approaches that only require knowledge of a network architecture and associated trained weights. Three types of artificial DNN inputs (i.e., zeros, ones, and Gaussian noise), unseen during DNN training, were input to three DNNs designed for ultrasound image formation, trained on multi-site data, and submitted to the Challenge on Ultrasound Beamforming with Deep Learning (CUBDL). Overfitting was detected using these artificial DNN inputs. Qualitative and quantitative comparisons of DNN-created images to ground truth images immediately revealed signs of overfitting (e.g., zeros input produced mean output values <span><math><mo>≥</mo></math></span>0.08, ones input produced mean output values <span><math><mo>≤</mo></math></span>0.07, with corresponding image-to-image normalized correlations <span><math><mo>≤</mo></math></span>0.8). The proposed approach is promising to detect overfitting without requiring lengthy network retraining or the curation of additional test data. Potential applications include sanity checks during federated learning, as well as optimization, security, public policy, regulation creation, and benchmarking.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"148 ","pages":"Article 107562"},"PeriodicalIF":3.8,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142923348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Applicability and applications of alternative TOFD techniques","authors":"Shijie Jin,&nbsp;Zhicheng Wang,&nbsp;Xinhao Wang,&nbsp;Shuyao Huangfu,&nbsp;Zhongbing Luo","doi":"10.1016/j.ultras.2024.107563","DOIUrl":"10.1016/j.ultras.2024.107563","url":null,"abstract":"<div><div>Ultrasonic time-of-flight diffraction (TOFD) technique is applied to non-destructive testing in engineering, but the dead zone influences its applicable range. Alternative TOFD techniques adopt the indirect diffracted waves having long propagation times to decouple from the lateral wave and detect near-surface defects. It should be noted that the applicability of these diffracted waves varies with parameter conditions employed for detection, e.g., sample thickness, defect depth, inspection frequency and probe center spacing (PCS). In this paper, aluminum alloy plates are selected as the research objects for comparative analysis and actual application of alternative TOFD techniques. For each alternative TOFD technique, the minimum time difference between structural waves, e.g., lateral wave and back-wall waves, and indirect diffracted wave in TOFD signals and images is defined as the evaluation index for characterizing its applicability. Three-dimensional diagrams of the applicability of mode-converted wave, LS-L wave and LL-S wave (L and S are the longitudinal wave and shear wave, respectively) are provided sequentially by theoretical calculations. On this basis, the theoretical model for selecting the optimal alternative TOFD technique under reasonable parameter conditions is established by compositing different three-dimensional diagrams. TOFD inspection was implemented on the defects with depths of 2.0–3.0 mm in the aluminum alloy plates with 7–20 mm thicknesses. The experimental results indicate that the alternative TOFD technique determined by the theoretical model is most suitable for detecting shallow subsurface defects. The range of dead zone is decreased effectively with the measurement errors of defect depths no more than 3.6 %. The related works have universality and can be extended to TOFD inspection of other materials and structures in future.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"148 ","pages":"Article 107563"},"PeriodicalIF":3.8,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142910924","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 detection of wrinkles in composites with gradual phase shift migration","authors":"Haiyan Zhang ,&nbsp;Jinfeng Si ,&nbsp;Hui Zhang ,&nbsp;Heming Wei ,&nbsp;Yiting Chen ,&nbsp;Wenfa Zhu ,&nbsp;Kailiang Xu ,&nbsp;Qi Zhu","doi":"10.1016/j.ultras.2024.107557","DOIUrl":"10.1016/j.ultras.2024.107557","url":null,"abstract":"<div><div>Fiber reinforced polymer composites (FRPs) are essential for various industrial fields, but wrinkles inside will greatly reduce their mechanical properties. Full-matrix capture (FMC) is a popular data structure for ultrasonic phased array imaging in composites. However, such structure may lead to data redundancy and noise interference. In this paper, a gradual phase shift migration (GPSM) is proposed to characterize wrinkles accurately. The gradual matrix is formed from the expansion along principal diagonal of FMC data with equal transmitter–receiver spacing. The dilemma between lateral resolution and sidelobe interference intensity is resolved to obtain the best imaging resolution by selecting an appropriate data structure. Moreover, to address the inconsistency of ultrasound velocities at different propagation directions caused by anisotropy of composites, the angle-dependant velocity is corrected by backwall reflection method (BRM). Based on gradual matrix data, the velocity-corrected phase shift factor is applied in the GPSM algorithm to obtain the wavefield at different depths through a layer-by-layer wavefield extrapolation. The experimental results indicate that four wrinkles can be detected in thick hybrid carbon-glass FRPs based on GPSM, with angle detection errors less than 6%. Furthermore, the GPSM method combining partial diagonal data takes only 0.5 s, achieving 60% improvement in computational efficiency compared to that with all gradual matrix data. The proposed method can be applied for high-resolution imaging of various multilayered medium in real-time.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"148 ","pages":"Article 107557"},"PeriodicalIF":3.8,"publicationDate":"2024-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142915661","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":"Intraoperative HIFU ablation of the liver at the hepatocaval confluence as adjunct to surgery: Preliminary animal experiments","authors":"Sophie Cambronero ,&nbsp;Aurélien Dupré ,&nbsp;Charles Mastier ,&nbsp;Yao Chen ,&nbsp;Olivier Hamelin ,&nbsp;David Melodelima","doi":"10.1016/j.ultras.2024.107556","DOIUrl":"10.1016/j.ultras.2024.107556","url":null,"abstract":"<div><div>Treating colorectal liver metastases (CLMs) located at the hepatocaval confluence with surgery is challenging due to its complexity and associated high risks of perioperative mortality and morbidity. Moreover, thermal ablation techniques are sensitive to the “heat-sink” effect, which reduces their efficacy when tumors are in contact with major blood vessels. In this study we evaluated the feasibility and safety of an intraoperative high-intensity focused ultrasound (HIFU) device for destroying liver tissue volumes sufficiently large to consider treating CLMs at the hepatocaval confluence. Experiments were conducted on six pigs that were followed up to 19 days after the treatment. One HIFU ablation in each animal was created using a 370 s exposure at 100 W. Homogeneous HIFU ablations of liver tissues were safely created at the hepatocaval confluence around the hepatic veins (HVs) in all animals. The targeted HVs were similar to those of humans, with an average diameter of 9.1 ± 1.4 mm. The longest and shortest axes of the HIFU ablations were on average 44.5 ± 11.5 mm and 26.7 ± 4.9 mm, respectively. These values indicate that this device could destroy CLMs up to 2 cm in diameter. Doppler acquisitions, MRI and histological analysis confirmed that HIFU ablations were in contact with the inferior vena cava and extended to the HV wall and that blood flow was maintained. This in vivo preclinical study showed that intraoperative HIFU destruction of liver tissues at the hepatocaval confluence under Doppler ultrasound guidance could therefore represent a new therapeutic option for CLMs.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"148 ","pages":"Article 107556"},"PeriodicalIF":3.8,"publicationDate":"2024-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142886149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A signal energy approach of acoustic source localization in plate structures using a discrete sensor array","authors":"Chenning Ma ,&nbsp;Zhiwen Cui ,&nbsp;Jinxia Liu ,&nbsp;Tribikram Kundu","doi":"10.1016/j.ultras.2024.107555","DOIUrl":"10.1016/j.ultras.2024.107555","url":null,"abstract":"<div><div>In the field of engineering structural health monitoring, acoustic source localization (ASL) is a common method to monitor early damage. Most of the existing ASL techniques have high requirements for accurate acquisition of time of arrival, and require complex iterative algorithms or signal processing techniques, which are not conducive to real-time monitoring. In this paper, a signal energy approach of acoustic source localization in plate structures using a discrete sensor array is proposed. The proposed method overcomes the above problems by simply using the amplitude of the recorded signal to calculate the energy and does not need to know the mechanical properties of the material in advance. Thus, it should be useful for real-time and efficient prediction of acoustic source. Numerical simulations and experiments are carried out on aluminum and composite plates to demonstrate the feasibility and application potential of the proposed method. The proposed method demonstrates good accuracy and holds significant potential for wide-ranging applications in the health monitoring of plate structures.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"148 ","pages":"Article 107555"},"PeriodicalIF":3.8,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142898568","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":"Quantitative evaluation of corrosion-thinning defect by an instantaneous wavenumber multi-shot fusion method based on laser ultrasonic guided wavefield detection","authors":"Zenghua Liu ,&nbsp;Xiaoyu Liu ,&nbsp;Jiuzhou Tian ,&nbsp;Di Gao ,&nbsp;Cunfu He ,&nbsp;Bin Wu","doi":"10.1016/j.ultras.2024.107561","DOIUrl":"10.1016/j.ultras.2024.107561","url":null,"abstract":"<div><div>The thickness loss caused by corrosion is a vital factor that threatens the health of shell structures. It is significant to perform a non-destructive quantitative evaluation of corrosion-thinning defects in plate structures. Based on the laser ultrasonic guided wavefield scanning technology, this paper proposes an instantaneous wavenumber multi-shot fusion method, which improves the performance of the instantaneous wavenumber imaging method. The guided wave mode and excitation parameters are selected through quantitative analysis. A simulation analysis revealed the interaction between guided wavefield and defect with local thickness loss under multiple excitation positions. The results show that a more accurate wavenumber estimation of the defect area can be achieved by utilizing the abundant wavefield information from multiple-point excitations. In addition, the imaging accuracy between single and multiple excitation techniques is compared and analyzed quantitatively in the experiment. It shows that the proposed method can improve the imaging accuracy in the defect area and suppress the imaging noise in the non-defect area, which verifies its effectiveness.</div></div>","PeriodicalId":23522,"journal":{"name":"Ultrasonics","volume":"148 ","pages":"Article 107561"},"PeriodicalIF":3.8,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142910925","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}