Shear wavelength estimation based on inverse filtering and multiple-point shear wave generation

Tomoaki Kitazaki, Kengo Kondo, Makoto Yamakawa, Tsuyoshi Shiina

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)

Abstract

Elastography provides important diagnostic information because tissue elasticity is related to pathological conditions. For example, in a mammary gland, higher grade malignancies yield harder tumors. Estimating shear wave speed enables the quantification of tissue elasticity imaging using time-of-flight. However, time-of-flight measurement is based on an assumption about the propagation direction of a shear wave which is highly affected by reflection and refraction, and thus might cause an artifact. An alternative elasticity estimation approach based on shear wavelength was proposed and applied to passive configurations. To determine the elasticity of tissue more quickly and more accurately, we proposed a new method for shear wave elasticity imaging that combines the shear wavelength approach and inverse filtering with multiple shear wave sources induced by acoustic radiation force (ARF). The feasibility of the proposed method was verified using an elasticity phantom with a hard inclusion.

Original languageEnglish
Article number07KF10
JournalJapanese Journal of Applied Physics
Volume55
Issue number7
DOIs
Publication statusPublished - 2016 Jul
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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