20 March 2014 Ultrasound bent-ray tomography using both transmission and reflection data
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Abstract
Ultrasound bent-ray tomography can produce the sound-speed distribution of the breast for detection and diagnosis of breast cancer. However, the conventional ultrasound ray tomography uses only transmission data, leading to low-resolution images. We develop a new ultrasound bent-ray tomography technique using both transmission and reflection data to improve sound-speed reconstructions. We employ an ultrasound reflection imaging technique, Kirchhoff migration, to obtain the locations of reflectors for calculating arrival times of ultrasound refection signals. We use both first-arrival times (time-of-flights) of ultrasound transmission data and arrival times of ultrasound reflection data for sound-speed reconstructions. Our numerical studies show that our new ultrasound bent-ray tomography using both transmission and reflection data significantly improves the image resolution and sound-speed reconstructions compared to the conventional ultrasound ray tomography using only transmission data.
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Nghia Q. Nguyen, Lianjie Huang, "Ultrasound bent-ray tomography using both transmission and reflection data", Proc. SPIE 9040, Medical Imaging 2014: Ultrasonic Imaging and Tomography, 90400R (20 March 2014); doi: 10.1117/12.2043275; https://doi.org/10.1117/12.2043275
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