NDLI: Ultrasound NDE imaging through reverberant layers via subspace analysis and projection

Content Provider	IEEE Xplore Digital Library
Author	Demirli, R. Amin, M.G. Zhang, Y.D.
Copyright Year	2012
Description	Author affiliation: Center for Adv. Commun., Villanova Univ., Villanova, PA, USA (Demirli, R.; Amin, M.G.; Zhang, Y.D.)
Abstract	In ultrasonic flaw imaging through reverberant layers, the top layer not only induces strong reverberation clutter but also repeats the flaw echo, giving rise to echo multiples. The reverberation clutter often overwhelms the target echoes, rendering the imaging of material flaws extremely difficult. Furthermore, echo multiples may obscure the identification of actual targets, especially when there are a number of targets in the scene. The reverberation clutter and flaw echo multiples must be suppressed or sufficiently mitigated in order to enable proper flaw imaging. In this paper, a subspace-based approach is utilized to suppress the reverberation clutter, followed by predictive filtering to suppress echo multiples. The clutter, due to its significantly high strength relative to the flaw echoes, is captured in the signal subspace that corresponds to the dominant eigenvalues of the data covariance matrix. It can be suppressed by applying orthogonal clutter subspace projection. Predictive deconvolution method is then used to suppress flaw echo multiples and enhance the visibility of the true flaw echoes in the presence of noise and clutter remnants. The effectiveness of the proposed imaging-through-layer approach is demonstrated via synthesized array data using real measurements of reverberation clutter and flaw echoes.
Starting Page	1031
Ending Page	1034
File Size	1591914
Page Count	4
File Format	PDF
ISBN	9781467345613
ISSN	19485719
e-ISBN	9781467345620
DOI	10.1109/ULTSYM.2012.0258
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-10-07
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Reverberation Clutter Imaging Arrays Transducers Ultrasonic variables measurement predictive deconvolution Ultrasound flaw imaging reverberation removal multiples suppression subspace projection
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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