Cross-correlation Full Waveform Inversion for Sound Speed Reconstruction in Ultrasound Computed Tomography

Date

2022-07-11

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DOI

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Conference

Peer reviewed

Yes

Abstract

Ultrasound computed tomography (USCT) is considered to have great potential for breast cancer screening. Compared with the ray based methods, the reconstructed image using full waveform inversion (FWI) methods have higher spatial resolution. However, the results of FWI is difficult to converge to the real value when cycle skipping occurs. In this paper, a cross-correlation full waveform inversion(CC-FWI) is proposed for USCT image reconstruction. In the first s tage, the ajoint source is adjusted as the residual of predicted signal and time-shifted measured signal to avoid cycle skipping. In the remaining stage, the FWI with source encoding is employed to accelerate convergence. The simulations are conducted to demonstrate the validity of the proposed algorithm. The root mean squared error (RMSE) of the proposed algorithm is much smaller than that of conventional FWI. The results suggest that CC-FWI is effective in avoiding cycle skipping.

Description

Keywords

breast cancer imaging, Ultra- sound computed tomography, Postdoctoral initial funding of Heilongjiang Province

Citation

Zhao, Y., Zhang, N., Lu, X., Yuan, Y., Shen, Y. (2022) Cross-correlation Full Waveform Inversion for Sound Speed Reconstruction in Ultrasound Computed Tomography. 44th Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC 2022), Glasgow, July 2022..

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Research Institute

Institute of Artificial Intelligence (IAI)