A new strategy to overcome cycle skipping: frequency-difference waveform inversion

Rehman Ali; Trevor Mitcham; Nebojsa Duric

doi:10.1117/12.3006287

1 April 2024 A new strategy to overcome cycle skipping: frequency-difference waveform inversion

Rehman Ali, Trevor Mitcham, Nebojsa Duric

Author Affiliations +

Proceedings Volume 12932, Medical Imaging 2024: Ultrasonic Imaging and Tomography; 129320G (2024) https://doi.org/10.1117/12.3006287
Event: SPIE Medical Imaging, 2024, San Diego, California, United States

Abstract

Most ultrasound transducer designs are driven towards high frequencies by the need to maximize the resolution achievable by B-mode reflectivity imaging. Because full-waveform inversion (FWI) requires low frequencies to overcome cycle skipping, it is often difficult to apply FWI to the same high-frequency transducer hardware. Recent work on time-domain adaptive waveform inversion (AWI) addresses this based on a deconvolution approach to overcome cycle skipping. However, most clinical implementations of ultrasound tomography rely on frequency-domain FWI to quickly reconstruct images on clinically relevant time scales. Although the broadband nature of AWI makes it difficult to translate to the frequency domain, we can approximate the properties of AWI by using a frequency-differencing approach. We develop and describe both a model-domain and a data-domain method for frequency-differencing. Simulations and phantom experiments show that each frequency-differencing approach helps overcome cycle skipping by providing a sufficiently accurate starting model for FWI.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Rehman Ali, Trevor Mitcham, and Nebojsa Duric "A new strategy to overcome cycle skipping: frequency-difference waveform inversion", Proc. SPIE 12932, Medical Imaging 2024: Ultrasonic Imaging and Tomography, 129320G (1 April 2024); https://doi.org/10.1117/12.3006287

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