Comparison of techniques for estimating shear-wave velocity in arterial wall using shear-wave elastography - FEM and phantom study

Jun Keun Jang, Kengo Kondo, Takeshi Namita, Makoto Yamakawa, Tsuyoshi Shiina

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

Shear-wave elastography (SWE) enables noninvasive and quantitative evaluation of the mechanical properties of human soft tissue. Generally, shear wave velocity (CS) can be estimated using the time-of-flight method (TM). Young's modulus is then calculated directly from the estimated CS. However, because shear waves in thin-layered media (e.g., arterial walls) propagate as guided waves, CS cannot be accurately estimated using the general TM. To overcome this problem, the Lamb-theory-based method (LM) was recently proposed. In this study, we performed both experimental and finite-element (FE) analyses to evaluate the advantage of LM over TM. In FE analysis, we investigated why the general TM is ineffective for thin-layered media. In phantom experiments, CS results estimated using the two methods were compared for 1.5% and 2% agar plate and tube phantoms. The results indicated good agreement between LM (plate phantoms 5.0m/s for 1.5% agar and 7.2m/s for 2% agar; tube phantoms 5.3m/s for 1.5% agar and 7.3m/s for 2% agar) and SWE measurements (bulk phantoms 5.3m/s ± 0.27 for 1.5% agar and 7.3m/s ± 0.54 for 2% agar).

Original languageEnglish
Title of host publication2015 IEEE International Ultrasonics Symposium, IUS 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479981823
DOIs
Publication statusPublished - 2015 Nov 13
Externally publishedYes
EventIEEE International Ultrasonics Symposium, IUS 2015 - Taipei, Taiwan, Province of China
Duration: 2015 Oct 212015 Oct 24

Publication series

Name2015 IEEE International Ultrasonics Symposium, IUS 2015

Conference

ConferenceIEEE International Ultrasonics Symposium, IUS 2015
Country/TerritoryTaiwan, Province of China
CityTaipei
Period15/10/2115/10/24

Keywords

  • Arterial stiffness
  • Lamb-theory-based method
  • Shear-wave elastography
  • Time-of-flight method

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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