29 March 2013 Resolution limitation of travel time tomography: beyond the first Fresnel zone
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Abstract
Previous studies concluded that the resolution limitation of travel-time tomography is the width of the first Fresnel zone. However, we believe that the resolution of ray tomography cannot simply be limited to the first Fresnel zone and is affected by many factors. In this study, we investigate a variety of factors that affect the resolving power of travel time tomography. These factors include accuracy of picked travel time, ray coverage (data density) and data signal-to-noise ratio (SNR). We also investigate to what extent that bent-ray travel-time tomography is capable of resolving anomalous objects smaller than the first Fresnel zone based on numerical simulations. We have shown that bent-ray travel-time tomography resolvability and detectability of small objects is better than the first Fresnel zone.
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Cuiping Li, Cuiping Li, Neb Duric, Neb Duric, } "Resolution limitation of travel time tomography: beyond the first Fresnel zone", Proc. SPIE 8675, Medical Imaging 2013: Ultrasonic Imaging, Tomography, and Therapy, 86751D (29 March 2013); doi: 10.1117/12.2006978; https://doi.org/10.1117/12.2006978
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