Articles with "time migration" as a keyword



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Single slice microwave imaging of breast cancer by reverse time migration.

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Published in 2022 at "Medical physics"

DOI: 10.1002/mp.15917

Abstract: PURPOSE Microwave imaging of breast cancer is considered and a new microwave imaging prototype including the imaging algorithm, the antenna array, and the measurement configuration is presented. The prototype aims to project the geometrical features… read more here.

Keywords: reverse time; microwave imaging; breast; single slice ... See more keywords
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First-Order Acoustic Wave Equation Reverse Time Migration Based on the Dual-Sensor Seismic Acquisition System

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Published in 2017 at "Pure and Applied Geophysics"

DOI: 10.1007/s00024-017-1468-3

Abstract: We analyze the mathematical requirements for conventional reverse time migration (RTM) and summarize their rationale. The known information provided by current acquisition system is inadequate for the second-order acoustic wave equations. Therefore, we introduce a… read more here.

Keywords: reverse time; dual sensor; time migration; sensor rtm ... See more keywords
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An encoder-decoder deep surrogate for reverse time migration in seismic imaging under uncertainty

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Published in 2021 at "Computational Geosciences"

DOI: 10.1007/s10596-021-10052-3

Abstract: Seismic imaging faces challenges due to the presence of several uncertainty sources. Uncertainties exist in data measurements, source positioning, and subsurface geophysical properties. Reverse time migration (RTM) is a high-resolution depth migration approach useful for… read more here.

Keywords: uncertainty; reverse time; time migration; time ... See more keywords
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Topography Least-Squares Reverse-Time Migration Based on Adaptive Unstructured Mesh

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Published in 2019 at "Surveys in Geophysics"

DOI: 10.1007/s10712-019-09578-0

Abstract: Least-squares reverse-time migration (LSRTM) attempts to invert the broadband-wavenumber reflectivity image by minimizing the residual between observed and predicted seismograms via linearized inversion. However, rugged topography poses a challenge in front of LSRTM. To tackle… read more here.

Keywords: topography; least squares; reverse time; squares reverse ... See more keywords
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Conjugate gradient and cross-correlation based least-square reverse time migration and its application

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Published in 2017 at "Applied Geophysics"

DOI: 10.1007/s11770-017-0626-9

Abstract: Although conventional reverse time migration can be perfectly applied to structural imaging it lacks the capability of enabling detailed delineation of a lithological reservoir due to irregular illumination. To obtain reliable reflectivity of the subsurface… read more here.

Keywords: reverse time; time migration; least square; migration ... See more keywords
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An efficient and accurate finite-difference operator using adaptively discretized grids and its application for 3D least-squares reverse-time migration

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Published in 2020 at "Arabian Journal of Geosciences"

DOI: 10.1007/s12517-020-05417-4

Abstract: Least-square reverse-time migration (LSRTM) is a powerful tool to image subsurface reflectivity with high resolution. It has the ability to reduce migration artifacts, balance amplitudes, and improve imaging resolution. However, the large amount of computation… read more here.

Keywords: reverse time; time; time migration; migration ... See more keywords
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3D reverse time migration using a wavefield domain dynamic approach

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Published in 2021 at "Journal of Applied Geophysics"

DOI: 10.1016/j.jappgeo.2021.104345

Abstract: Abstract 3D Reverse-time migration (RTM) is a powerful technique for imaging complex geologic structures. This approach requires a significant computational effort, demanding a high amount of memory for storing the source's wavefields, consequently leading to… read more here.

Keywords: approach; reverse time; rtm; domain ... See more keywords
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Reverse time migration of acoustic waves for imaging based defects detection for concrete and CFST structures

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Published in 2019 at "Mechanical Systems and Signal Processing"

DOI: 10.1016/j.ymssp.2018.07.011

Abstract: Abstract Ultrasonic non-destructive testing (NDT) technology has been widely used for defect inspection of concrete structures in civil engineering. However, most of the current data processing methods can only provide qualitative information regarding the existence… read more here.

Keywords: reverse time; time migration; cfst; concrete cfst ... See more keywords
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A comparison of two reflectivity parametrizations in acoustic least-squares reverse time migration

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Published in 2019 at "Exploration Geophysics"

DOI: 10.1080/08123985.2019.1682459

Abstract: ABSTRACT In comparison with conventional reverse time migration (RTM), least-squares RTM (LSRTM) can improve imaging resolution and compensate irregular illumination caused by acquisition geometry and complex structures. Since proposed, as an advanced version of RTM,… read more here.

Keywords: reverse time; reflectivity; time migration; least squares ... See more keywords
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Reproduction wavefield reverse time migration

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Published in 2021 at "Exploration Geophysics"

DOI: 10.1080/08123985.2021.1903810

Abstract: The reverse time migration (RTM) aims to image subsurface reflectors by incorporating with the two-way wave equation. RTM has advantages that it does not have dip limitations and can generate subsurface images clearly even in… read more here.

Keywords: reproduction wavefield; reverse time; time migration; wavefield reverse ... See more keywords
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Auto-Tuning of Dynamic Scheduling Applied to 3D Reverse Time Migration on Multicore Systems

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Published in 2020 at "IEEE Access"

DOI: 10.1109/access.2020.3015045

Abstract: Reverse time migration (RTM) is an algorithm widely used in the oil and gas industry to process seismic data. It is a computationally intensive task that suits well in parallel computers. Methods such as RTM… read more here.

Keywords: time; reverse time; dynamic scheduling; multicore systems ... See more keywords