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Localization and classification of scattered nonlinear ultrasonic signatures in bio-mechanical media using time reversal approach
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SYSNO ASEP 0576078 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Localization and classification of scattered nonlinear ultrasonic signatures in bio-mechanical media using time reversal approach Author(s) Dvořáková, Zuzana (UT-L) ORCID, RID
Dos Santos, S. (FR)
Kůs, V. (CZ)
Převorovský, Zdeněk (UT-L) RID, ORCIDNumber of authors 4 Source Title Journal of the Acoustical Society of America. - : Acoustical Society of America - ISSN 0001-4966
Roč. 154, č. 3 (2023), s. 1684-1695Number of pages 12 s. Publication form Print - P Language eng - English Country US - United States Keywords time reversal approach ; nonlinearity ; signal classification ; Φ-divergence Subject RIV BI - Acoustics OECD category Materials engineering Method of publishing Limited access Institutional support UT-L - RVO:61388998 UT WOS 001079145600005 EID SCOPUS 85171119752 DOI https://doi.org/10.1121/10.0020658 Annotation This paper deals with the time reversal approach along with signal classification using ϕ-divergences in biomedical applications for localization and statistical classification of ultrasonic nonlinearities. The time reversal (TR) approach in combination with nonlinear elastic wave spectroscopy (NEWS) is used to obtain the nonlinear signature of air bubbles with different sizes and ultrasound contrast agents in a liquid. An optimized chirp-coded signal in the range of 0.6–3 MHz is used as a compression coding. The signal classification is performed using the fuzzy classification method and the divergence decision tree algorithm using specific ϕ-divergence spectral measures extracted from the received ultrasonic response containing acoustic nonlinearities. The classification results prove that different types of nonlinearities extracted with classical “pulse inversion” based coding methods can be identified. Simultaneously, the different positions of scattered sources are distinguished by ϕ-divergence methods. The potential of time reversal nonlinear elastic wave spectroscopy methods for understanding of ultrasonic wave propagation in complex media is clearly exhibited. Workplace Institute of Thermomechanics Contact Marie Kajprová, kajprova@it.cas.cz, Tel.: 266 053 154 ; Jana Lahovská, jaja@it.cas.cz, Tel.: 266 053 823 Year of Publishing 2024 Electronic address https://pubs.aip.org/asa/jasa/article-abstract/154/3/1684/2911418/Localization-and-classification-of-scattered?redirectedFrom=fulltext
Number of the records: 1