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Title
Japanese:トポロジー導関数を用いた超音波イメージングの実験的検証 
English: 
Author
Japanese: 中畑和之, 中村 悠人, 丸山 泰蔵, 斎藤隆泰.  
English: Kazuyuki Nakahata, 中村 悠人, Taizo Maruyama, Takahiro Saitoh.  
Language Japanese 
Journal/Book name
Japanese:年次大会 
English: 
Volume, Number, Page Vol. 2022    No. 0    pp. J041-03
Published date Mar. 2023 
Publisher
Japanese:一般社団法人 日本機械学会 
English: 
Conference name
Japanese: 
English: 
Conference site
Japanese: 
English: 
Abstract <p>We investigated an array ultrasonic imaging method using the topological derivative. The topological derivative is formulated based on the sensitivity of the cost functional associated with the inverse scattering problem due to the creation of an infinitesimal rigid inclusion. To calculate the topological derivative, time convolutions of a free field and a supplementary adjoint field are required. In this study, scattered waves from flaws were received with an array transducer, then the supplementary adjoint field using the measured waves was calculated in the framework of the finite integration technique (EFIT). Finally, flaw imaging was performed by plotting the obtained topological derivative in the target region.</p>

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