Seismic and medical ultrasound imaging of velocity and density variations by nonlinear vectorial inverse scattering

M Jakobsen, K Xiang, KWA van Dongen - The Journal of the …, 2023 - pubs.aip.org
We present an iterative nonlinear inverse scattering algorithm for high-resolution acoustic
imaging of density and velocity variations. To solve the multi-parameter nonlinear direct …

Design of ultrasonic synthetic aperture imaging systems based on a non-grid 2D sparse array

JCE de Souza, M Parrilla Romero, RT Higuti… - Sensors, 2021 - mdpi.com
This work provides a guide to design ultrasonic synthetic aperture systems for non-grid two-
dimensional sparse arrays such as spirals or annular segmented arrays. It presents an …

Ultrasound imaging of the brain using full-waveform inversion

U Taskin, KS Eikrem, G Nævdal… - 2020 IEEE …, 2020 - ieeexplore.ieee.org
Transcranial ultrasound has been used to image the brain since 1942. Currently, it is
regaining interest and full-waveform inversion (FWI) methods are now employed to …

Contrast source inversion on experimental data: initial results

U Taskin, A Suzuki, T Terada, Y Tsubota… - Medical Imaging …, 2022 - spiedigitallibrary.org
Quantitative images showing the speed of sound profile of the breast may be obtained by
employing full-waveform inversion (FWI) methods on the measured data. These …

Selecting the number and location of sources and receivers for non-linear time-domain inversion

AB Ramirez, SA Abreo… - 2017 IEEE International …, 2017 - ieeexplore.ieee.org
The design of ultrasound scanning systems for breast cancer detection is a challenging task.
To decide on the number of transducers and where to place them, several approaches could …

A frequency-hopping technique for solving the cycle-skipping problem encountered with acoustic full-waveform inversion

UI Taskin, KWA Van Dongen - 2020 IEEE International …, 2020 - ieeexplore.ieee.org
Full-waveform inversion methods are widely used for breast imaging to provide quantitative
information about the tissues such as the speed of sound. Full-waveform inversion faces a …

[PDF][PDF] Delft Breast Ultrasound

E Janssen - repository.tudelft.nl
Breast cancer is impacting over 1.5 million women each year. Early detection is essential in
decreasing the mortality rate. Mammography is currently the golden standard for breast …