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

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 behin...

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Detalles Bibliográficos
Autores principales: Minato, Shohei, Ghose, Ranajit
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8586361/
https://www.ncbi.nlm.nih.gov/pubmed/34764320
http://dx.doi.org/10.1038/s41598-021-01199-1
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author Minato, Shohei
Ghose, Ranajit
author_facet Minato, Shohei
Ghose, Ranajit
author_sort Minato, Shohei
collection PubMed
description 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.
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spelling pubmed-85863612021-11-16 A novel principle to localize the sensitivity of waveform tomography using wave interferences at the observation boundary Minato, Shohei Ghose, Ranajit Sci Rep Article 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. Nature Publishing Group UK 2021-11-11 /pmc/articles/PMC8586361/ /pubmed/34764320 http://dx.doi.org/10.1038/s41598-021-01199-1 Text en © The Author(s) 2021 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Minato, Shohei
Ghose, Ranajit
A novel principle to localize the sensitivity of waveform tomography using wave interferences at the observation boundary
title 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_short 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
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8586361/
https://www.ncbi.nlm.nih.gov/pubmed/34764320
http://dx.doi.org/10.1038/s41598-021-01199-1
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