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Title: Anisotropic modeling and joint-MAP stitching for improved ultrasound model-based iterative reconstruction of large and thick specimens

Abstract

One-sided non-destructive evaluation (NDE) is widely used to inspect materials, such as concrete structures in nuclear power plants (NPP). A widely used method for one-sided NDE is the synthetic aperture focusing technique (SAFT). The SAFT algorithm produces reasonable results when inspecting simple structures. However, for complex structures, such as heavily reinforced thick concrete structures, SAFT results in artifacts and hence there is a need for a more sophisticated inversion technique. Model-based iterative reconstruction (MBIR) algorithms, which are typically equivalent to regularized inversion techniques, offer a powerful framework to incorporate complex models for the physics, detector miscalibrations and the materials being imaged to obtain high quality reconstructions. Previously, we have proposed an ultrasonic MBIR method that signifcantly improves reconstruction quality compared to SAFT. However, the method made some simplifying assumptions on the propagation model and did not disucss ways to handle data that is obtained by raster scanning a system over a surface to inspect large regions. In this paper, we propose a novel MBIR algorithm that incorporates an anisotropic forward model and allows for the joint processing of data obtained from a system that raster scans a large surface. We demonstrate that the new MBIR method can produce dramatic improvementsmore » in reconstruction quality compared to SAFT and suppresses articfacts compared to the perviously presented MBIR approach.« less

Authors:
 [1]; ORCiD logo [2]; ORCiD logo [2]; ORCiD logo [2];  [1]; ORCiD logo [2]
  1. Purdue University
  2. ORNL
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1437918
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Journal Volume: 1949; Conference: Review of Progress in Quantitative Nondestructive Evaluation (QNDE) - Provo, Utah, United States of America - 7/17/2017 8:00:00 AM-7/20/2017 8:00:00 AM
Country of Publication:
United States
Language:
English

Citation Formats

Almansouri, Hani, Venkatakrishnan, Singanallur V., Clayton, Dwight A., Polsky, Yarom, Bouman, Charles, and Santos-Villalobos, Hector J. Anisotropic modeling and joint-MAP stitching for improved ultrasound model-based iterative reconstruction of large and thick specimens. United States: N. p., 2018. Web. doi:10.1063/1.5031525.
Almansouri, Hani, Venkatakrishnan, Singanallur V., Clayton, Dwight A., Polsky, Yarom, Bouman, Charles, & Santos-Villalobos, Hector J. Anisotropic modeling and joint-MAP stitching for improved ultrasound model-based iterative reconstruction of large and thick specimens. United States. doi:10.1063/1.5031525.
Almansouri, Hani, Venkatakrishnan, Singanallur V., Clayton, Dwight A., Polsky, Yarom, Bouman, Charles, and Santos-Villalobos, Hector J. Sun . "Anisotropic modeling and joint-MAP stitching for improved ultrasound model-based iterative reconstruction of large and thick specimens". United States. doi:10.1063/1.5031525. https://www.osti.gov/servlets/purl/1437918.
@article{osti_1437918,
title = {Anisotropic modeling and joint-MAP stitching for improved ultrasound model-based iterative reconstruction of large and thick specimens},
author = {Almansouri, Hani and Venkatakrishnan, Singanallur V. and Clayton, Dwight A. and Polsky, Yarom and Bouman, Charles and Santos-Villalobos, Hector J.},
abstractNote = {One-sided non-destructive evaluation (NDE) is widely used to inspect materials, such as concrete structures in nuclear power plants (NPP). A widely used method for one-sided NDE is the synthetic aperture focusing technique (SAFT). The SAFT algorithm produces reasonable results when inspecting simple structures. However, for complex structures, such as heavily reinforced thick concrete structures, SAFT results in artifacts and hence there is a need for a more sophisticated inversion technique. Model-based iterative reconstruction (MBIR) algorithms, which are typically equivalent to regularized inversion techniques, offer a powerful framework to incorporate complex models for the physics, detector miscalibrations and the materials being imaged to obtain high quality reconstructions. Previously, we have proposed an ultrasonic MBIR method that signifcantly improves reconstruction quality compared to SAFT. However, the method made some simplifying assumptions on the propagation model and did not disucss ways to handle data that is obtained by raster scanning a system over a surface to inspect large regions. In this paper, we propose a novel MBIR algorithm that incorporates an anisotropic forward model and allows for the joint processing of data obtained from a system that raster scans a large surface. We demonstrate that the new MBIR method can produce dramatic improvements in reconstruction quality compared to SAFT and suppresses articfacts compared to the perviously presented MBIR approach.},
doi = {10.1063/1.5031525},
journal = {},
issn = {0094--243X},
number = ,
volume = 1949,
place = {United States},
year = {2018},
month = {4}
}

Conference:
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