Results 31 to 40 of about 63,920 (326)

Adversarial Deformation Regularization for Training Image Registration Neural Networks [PDF]

open access: yes, 2018
We describe an adversarial learning approach to constrain convolutional neural network training for image registration, replacing heuristic smoothness measures of displacement fields often used in these tasks.
Barratt, Dean C.   +8 more
core   +2 more sources

The impact of vaporized nanoemulsions on ultrasound-mediated ablation [PDF]

open access: yes, 2013
BACKGROUND: The clinical feasibility of using high-intensity focused ultrasound (HIFU) for ablation of solid tumors is limited by the high acoustic pressures and long treatment times required.
Kopechek, Jonathan A.   +2 more
core   +1 more source

Ultrasound localization microscopy to image and assess microvasculature in a rat kidney. [PDF]

open access: yes, 2017
The recent development of ultrasound localization microscopy, where individual microbubbles (contrast agents) are detected and tracked within the vasculature, provides new opportunities for imaging the vasculature of entire organs with a spatial ...
Ferrara, Katherine W   +5 more
core   +3 more sources

Evaluation of a wave-vector-frequency-domain method for nonlinear wave propagation [PDF]

open access: yes, 2011
A wave-vector-frequency-domain method is presented to describe one-directional forward or backward acoustic wave propagation in a nonlinear homogeneous medium.
Duck F. A.   +4 more
core   +2 more sources

Feedback control of the acoustic pressure in ultrasonic wave propagation [PDF]

open access: yes, 2018
Classical models for the propagation of ultrasound waves are the Westervelt equation, the Kuznetsov and the Khokhlov-Zabolotskaya-Kuznetsov equations.
Bucci, Francesca, Lasiecka, Irena
core   +2 more sources

Nonlinear Waveform Inversion for Quantitative Ultrasound

open access: yesIEEE 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

Nonlinear acoustic and microwave absorption in disordered semiconductors

open access: yes, 2000
Nonlinear hopping absorption of ultrasound and electromagnetic waves in amorphous and doped semiconductors is considered. It is shown that even at low amplitudes of the electric (or acoustic) field the nonlinear corrections to the relaxational absorption
A. Hikata   +23 more
core   +1 more source

Optical observations of acoustical radiation force effects on individual air bubbles [PDF]

open access: yes, 2005
Previous studies dealing with contrast agent microbubbles have demonstrated that ultrasound (US) can significantly influence the movement of microbubbles.
Bouakaz, Ayache   +4 more
core   +2 more sources

Nonlinear ultrasonic characterization of γ΄ phase evolution in DZ411 alloy after long-term aging

open access: yesCailiao gongcheng
To explore the feasibility of the nonlinear ultrasonic method in the aging microstructure evolution application of directionally solidified nickel-based superalloy, DZ411 directionally solidified nickel-based superalloy is studied.The microstructure ...
YANG Gangzhengliang   +3 more
doaj   +1 more source

Acoustical Ranging Techniques in Embedded Wireless Sensor Networked Devices [PDF]

open access: yes, 2013
Location sensing provides endless opportunities for a wide range of applications in GPS-obstructed environments; where, typically, there is a need for higher degree of accuracy.
Jha, Sanjay   +4 more
core   +2 more sources

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