2017
DOI: 10.1117/12.2253849
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Improved misfit function for attenuation and speed reconstruction in ultrasound computed tomography

Abstract: The reconstruction of acoustic attenuation maps for transmission Ultrasound Computed Tomography (USCT) based on the standard least-squares full wave inversion method requires the accurate knowledge of the sound speed map in the region under study. Any deviation in the reconstructed speed maps creates a very significant bias in the attenuation map, as the standard least-squares misfit function is more sensitive to time misalignments than to amplitude differences of the signals. In this work, we propose a genera… Show more

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Cited by 1 publication
(1 citation statement)
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“…The TOF and signal attenuation values extracted from the transmitted data served as the input for a bent-ray-tracing iterative reconstruction algorithm 38 . In this work, the shortest (geodesic) path between each pair of ultrasound transducers for a given SoS map was modeled as a Bézier curve 89,90 . The geodesic path was selected among a family of quadratic Bézier curves connecting the emitter and the receiver as the curve providing the lowest TOF.…”
Section: Methodsmentioning
confidence: 99%
“…The TOF and signal attenuation values extracted from the transmitted data served as the input for a bent-ray-tracing iterative reconstruction algorithm 38 . In this work, the shortest (geodesic) path between each pair of ultrasound transducers for a given SoS map was modeled as a Bézier curve 89,90 . The geodesic path was selected among a family of quadratic Bézier curves connecting the emitter and the receiver as the curve providing the lowest TOF.…”
Section: Methodsmentioning
confidence: 99%