Nonlinear Ultrasound Crack Detection with Multi-Frequency Excitation—A Comparison [PDF]
Sensors, 2021 Nonlinear ultrasound crack detection methods are used as modern, non-destructive testing tools for inspecting early damages in various materials. Nonlinear ultrasonic wave modulation, where typically two or more frequencies are excited, was demonstrated ...
Frank Mevissen, Michele Meo
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Quantitative tissue perfusion imaging using nonlinear ultrasound localization microscopy [PDF]
Scientific Reports, 2022 Ultrasound localization microscopy (ULM) is a recent advancement in ultrasound imaging that uses microbubble contrast agents to yield vascular images that break the classical diffraction limit on spatial resolution.
Jennifer N. Harmon +5 more
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Nonlinear Ultrasound Imaging Modeled by a Westervelt Equation
SIAM Journal on Applied Mathematics, 2022 We consider the ultrasound imaging problem governed by a nonlinear wave equation of Westervelt type with variable wave speed. We show that the coefficient of nonlinearity can be recovered uniquely from knowledge of the Dirichlet-to-Neumann map. Our proof is based on a second order linearization and the use of Gaussian beam solutions to reduce the ...
Jian Zhai +2 more
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Nonlinear ultrasound imaging of nanoscale acoustic biomolecules. [PDF]
Appl Phys Lett, 2017 Ultrasound imaging is widely used to probe the mechanical structure of tissues and visualize blood flow. However, the ability of ultrasound to observe specific molecular and cellular signals is limited. Recently, a unique class of gas-filled protein nanostructures called gas vesicles (GVs) was introduced as nanoscale (∼250 nm) contrast agents for ...
Maresca D +7 more
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An Interface Pressure Detection Method of Cable Silicone Rubber-XLPE Based on Nonlinear Ultrasound
Applied Sciences, 2023 The interface pressure between the cable attachment and the body is crucial for the stable long-term operation of the cable. To solve the issue of interface insulation characteristics’ damage caused by the pressure transducer measurement method, a non ...
Chunhua Fang +7 more
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Ultrasonics SonochemistryDual-frequency ultrasound has been widely employed to enhance and regulate acoustic droplet vaporization (ADV) but the role of ultrasonic nonlinear effects on it remains unclear.
Yubo Zhao, Yi Feng, Liang Wu
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A Frequency-Dependent and Nonlinear, Time-Explicit Five-Layer Human Head Numerical Model for Realistic Estimation of Focused Acoustic Transmission Through the Human Skull for Noninvasive High-Intensity and High-Frequency Transcranial Ultrasound Stimulation: An Application to Neurological and Psychiatric Disorders [PDF]
BioengineeringTranscranial focused ultrasound is a promising noninvasive technique for neuromodulation in neurological and psychiatric disorders, but accurate prediction of acoustic transmission through the skull remains a major challenge.
Shivam Sharma +2 more
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The Variation of Precipitated Phase Investigated with the Usage of Nonlinear Ultrasonic Technique
Archives of Acoustics, 2021 It is well known that nonlinear ultrasound is sensitive to some microstructural characteristics in material. This paper investigates the dependence of the nonlinear ultrasonic characteristic on Al-Cu precipitation in heat-treated 2219-T6 aluminum alloy ...
Jun YOU, Yunxin WU, Hai GONG
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Nonlinear Ultrasonic Imaging for Porosity Evaluation
Sensors, 2023 The influence of porosity on the mechanical behaviour of composite laminates represents a complex problem that involves many variables. Therefore, the evaluation of the type and volume content of porosity in a composite specimen is important for quality ...
Mario Emanuele De Simone +3 more
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Applied Sciences, 2021 When two rough surfaces are loaded together contact occurs at asperity peaks. An interface of solid contact regions and air gaps is formed that is less stiff than the bulk material.
Saeid Taghizadeh +1 more
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