Results 11 to 20 of about 19,778 (259)
Nonlinear Waveform Inversion for Quantitative Ultrasound
IEEE Transactions on Computational Imaging, 2022 Due to its non-invasive and non-radiating nature, along with its low cost, ultrasound (US) imaging is widely used in medical applications. Typical B-mode US images have limited resolution and contrast and weak physical interpretation. Inverse US methods were developed to reconstruct the media's speed-of-sound (SoS) based on a linear acoustic model ...
Avner Shultzman, Yonina C. Eldar
openaire +2 more sources
A Nonlinear Ultrasonic Modulation Method for Crack Detection in Turbine Blades
Aerospace, 2020 In modern gas turbines, efforts are being made to improve efficiency even further. This is achieved primarily by increasing the generated pressure ratio in the compressor and by increasing the turbine inlet temperature.
Frank Mevissen, Michele Meo
doaj +1 more source
BMC Musculoskeletal Disorders, 2022 Purpose We built a joint replacement loosening model based on the original rabbit model of infection and evaluated the performance characteristics of 18F-FDG and 68 Ga-FAPI in evaluating infection and loosening.
Yiqun Wang +9 more
doaj +1 more source
Weakly nonlinear focused ultrasound in viscoelastic media containing multiple bubbles
Ultrasonics Sonochemistry, 2023 To facilitate practical medical applications such as cancer treatment utilizing focused ultrasound and bubbles, a mathematical model that can describe the soft viscoelasticity of human body, the nonlinear propagation of focused ultrasound, and the ...
Shunsuke Kagami, Tetsuya Kanagawa
doaj +1 more source
Shock and Vibration, 2023 This paper presents the development of a numerical model able to track in time the behavior of nonlinear focused ultrasound when interacting with tiny gas bubbles in a liquid.
María Teresa Tejedor Sastre +3 more
doaj +1 more source
Theoretical prediction of the scattering of spherical bubble clusters under ultrasonic excitation
Ultrasonics Sonochemistry, 2023 Due to the nonlinear vibration of ultrasound contrast agent bubbles, a nonlinear scattered sound field will be generated when bubbles are driven by ultrasound. A bubble cluster consists of numerous bubbles gathering in a spherical space.
Xin Xu, Menyang Gong, Xiaozhou Liu
doaj +1 more source
Simulation of Three Constitutive Behaviors Based on Nonlinear Ultrasound
Applied Sciences, 2020 Nonlinear ultrasound has attracted more and more attention. In classical acoustic nonlinear theory, the source of nonlinearity is the change of constitutive relation of materials.
Zaifu Zhan +5 more
doaj +1 more source
International Journal of Hyperthermia, 2019 Purpose: A real-time noninvasive thermometry technique is required to estimate the temperature distribution during hyperthermia to monitor and control the treatment.
Borna Maraghechi +2 more
doaj +1 more source
Modelling Nonlinear Ultrasound Propagation in Bone
AIP Conference Proceedings, 2006 Simulations have been carried out to assess the possibility for detecting the nonlinear properties of bone in vivo. We employed a time domain solution to the KZK equation to determine the nonlinear field generated by an unfocussed circular transducer in both cancellous and cortical bone.
Cleveland, R +5 more
openaire +2 more sources
Nonlinear response to ultrasound of encapsulated microbubbles [PDF]
Ultrasonics, 2012 The acoustic backscatter of encapsulated gas-filled microbubbles immersed in a weak compressible liquid and irradiated by ultrasound fields of moderate to high pressure amplitudes is investigated theoretically. The problem is formulated by considering, for the viscoelastic shell of finite thickness, an isotropic hyperelastic neo-Hookean model for the ...
openaire +3 more sources