Model-based Estimation of Elastic Moduli by Local Displacement Observation of an Elastic Body

• Morita Mitsuki

  Graduate School of Informatics, Kyoto University

• Nakao Megumi

  Graduate School of Informatics, Kyoto University

• Matsuda Tetsuya

  Graduate School of Informatics, Kyoto University

抄録

As the pathological characteristics of living tissue generally correlate with tissue stiffness, techniques such as ultrasound elastography play an important role in the medical field. One issue with elastography is the limited area of measurement. To determine the spatial distribution of elastic moduli, model-based estimation methods have been developed. However, these methods can only be applied to the observable area, and expanding the estimation area remains problematic. This paper introduces a method to estimate the spatial distribution of elastic moduli over the entire elastic body from locally observed deformation patterns. The reconstruction of elasticity from multiple deformation patterns is formulated as a minimization problem based on the sparseness of the gradient of tissue elasticity. Based on simulation experiments investigating the performance of the proposed method, we confirm that spatial variations in elasticity are effectively estimated and the area of elasticity reconstruction is extended.

収録刊行物

• Advanced Biomedical Engineering

  Advanced Biomedical Engineering 7 (0), 39-46, 2018

  公益社団法人 日本生体医工学会

キーワード

• elastic modulus estimation
• finite element modeling
• sparse signal reconstruction

詳細情報

• CRID: 1390001205503080576
• NII論文ID: 130006391758
• DOI: 10.14326/abe.7.39
• ISSN: 21875219
• Web Site: https://www.jstage.jst.go.jp/article/abe/7/0/7_7_39/_pdf
• Web Site: https://search.jamas.or.jp/link/ui/2020165317
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可