A novel principle to localize the sensitivity of waveform tomography using wave interferences at the observation boundary

Abstract When using waveform tomography to perform high-resolution imaging of a medium, it is vital to calculate the sensitivity in order to describe how well a model fits a given set of data and how the sensitivity changes with the spatial distribution of the heterogeneities. The traditional princi...

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Autores principales:	Shohei Minato, Ranajit Ghose
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/529a7e01a9fd42739de63e0622e648b9
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spelling	oai:doaj.org-article:529a7e01a9fd42739de63e0622e648b92021-11-14T12:23:13ZA novel principle to localize the sensitivity of waveform tomography using wave interferences at the observation boundary10.1038/s41598-021-01199-12045-2322https://doaj.org/article/529a7e01a9fd42739de63e0622e648b92021-11-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-01199-1https://doaj.org/toc/2045-2322Abstract When using waveform tomography to perform high-resolution imaging of a medium, it is vital to calculate the sensitivity in order to describe how well a model fits a given set of data and how the sensitivity changes with the spatial distribution of the heterogeneities. The traditional principle behind calculating the sensitivity—for detecting small changes—suffers from an inherent limitation in case other structures, not of interest, are present along the wave propagation path. We propose a novel principle that leads to enhanced localization of the sensitivity of the waveform tomography, without having to know the intermediate structures. This new principle emerges from a boundary integral representation which utilizes wave interferences observed at multiple points. When tested on geophysical acoustic wave data, this new principle leads to much better sensitivity localization and detection of small changes in seismic velocities, which were otherwise impossible. Overcoming the insensitivity to a target area, it offers new possibilities for imaging and monitoring small changes in properties, which is critical in a wide range of disciplines and scales.Shohei MinatoRanajit GhoseNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-15 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Shohei Minato Ranajit Ghose A novel principle to localize the sensitivity of waveform tomography using wave interferences at the observation boundary
description	Abstract When using waveform tomography to perform high-resolution imaging of a medium, it is vital to calculate the sensitivity in order to describe how well a model fits a given set of data and how the sensitivity changes with the spatial distribution of the heterogeneities. The traditional principle behind calculating the sensitivity—for detecting small changes—suffers from an inherent limitation in case other structures, not of interest, are present along the wave propagation path. We propose a novel principle that leads to enhanced localization of the sensitivity of the waveform tomography, without having to know the intermediate structures. This new principle emerges from a boundary integral representation which utilizes wave interferences observed at multiple points. When tested on geophysical acoustic wave data, this new principle leads to much better sensitivity localization and detection of small changes in seismic velocities, which were otherwise impossible. Overcoming the insensitivity to a target area, it offers new possibilities for imaging and monitoring small changes in properties, which is critical in a wide range of disciplines and scales.
format	article
author	Shohei Minato Ranajit Ghose
author_facet	Shohei Minato Ranajit Ghose
author_sort	Shohei Minato
title	A novel principle to localize the sensitivity of waveform tomography using wave interferences at the observation boundary
title_short	A novel principle to localize the sensitivity of waveform tomography using wave interferences at the observation boundary
title_full	A novel principle to localize the sensitivity of waveform tomography using wave interferences at the observation boundary
title_fullStr	A novel principle to localize the sensitivity of waveform tomography using wave interferences at the observation boundary
title_full_unstemmed	A novel principle to localize the sensitivity of waveform tomography using wave interferences at the observation boundary
title_sort	novel principle to localize the sensitivity of waveform tomography using wave interferences at the observation boundary
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/529a7e01a9fd42739de63e0622e648b9
work_keys_str_mv	AT shoheiminato anovelprincipletolocalizethesensitivityofwaveformtomographyusingwaveinterferencesattheobservationboundary AT ranajitghose anovelprincipletolocalizethesensitivityofwaveformtomographyusingwaveinterferencesattheobservationboundary AT shoheiminato novelprincipletolocalizethesensitivityofwaveformtomographyusingwaveinterferencesattheobservationboundary AT ranajitghose novelprincipletolocalizethesensitivityofwaveformtomographyusingwaveinterferencesattheobservationboundary
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A novel principle to localize the sensitivity of waveform tomography using wave interferences at the observation boundary

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