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<https://discovery.ucl.ac.uk/id/eprint/1550376> <http://purl.org/dc/terms/title> "Time domain reconstruction of sound speed and attenuation in ultrasound computed tomography using full wave inversion"^^<http://www.w3.org/2001/XMLSchema#string> .
<https://discovery.ucl.ac.uk/id/eprint/1550376> <http://purl.org/ontology/bibo/abstract> "Ultrasound computed tomography (USCT) is a non-invasive imaging technique that provides information\r\nabout the acoustic properties of soft tissues in the body, such as the speed of sound (SS) and\r\nacoustic attenuation (AA). Knowledge of these properties can improve the discrimination between\r\nbenign and malignant masses, especially in breast cancer studies. Full wave inversion (FWI) methods\r\nfor image reconstruction in USCT provide the best image quality compared to more approximate\r\nmethods. Using FWI, the SS is usually recovered in the time domain, and the AA is usually\r\nrecovered in the frequency domain. Nevertheless, as both properties can be obtained from the same\r\ndata, it is desirable to have a common framework to reconstruct both distributions. In this work, an\r\nalgorithm is proposed to reconstruct both the SS and AA distributions using a time domain FWI\r\nmethodology based on the fractional Laplacian wave equation, an adjoint field formulation, and a\r\ngradient-descent method. The optimization code employs a Compute Unified Device Architecture\r\nversion of the software k-Wave, which provides high computational efficiency. The performance of\r\nthe method was evaluated using simulated noisy data from numerical breast phantoms. Errors were\r\nless than 0.5% in the recovered SS and 10% in the AA. VC"^^<http://www.w3.org/2001/XMLSchema#string> .
<https://discovery.ucl.ac.uk/id/eprint/1550376> <http://purl.org/dc/terms/date> "2017-03" .
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