Experimental validation of simultaneous excitation of orthogonal eoded push pulses for fast shear wave elastography

Takuya Matsumoto, Kengo Kondo, Takeshi Namita, Makoto Yamakawa, Tsuyoshi Shiina

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

Abstract

Shear wave elastography is useful for quantitatively evaluating tissue elasticity by measuring the speed of a shear wave induced within the body by acoustic radiation. The purpose of this paper is to demonstrate a pushing-and-imaging sequence, coded push pulse excitation to increase the signal-to-noise ratio (SNR) of the observed shear wave propagation without increasing measurement time and push pulse amplitude. In this paper, we irradiate multiple coded-pulse sequences from different locations at the same time and separate overlapped shear waves by decoding to quickly image a wider area with high SNR. We divided the aperture into two sub-apertures and irradiated coded pulse sequences from each sub-aperture at the same time using Orthogonal Golay Code (OGC). The received shear waves induced by two push pulse sequences are overlapped but are separated orthogonaly after postprocessing. As a result, measurement time decreases and SNR increases due to push pulse compression. The proposed method was validated with an elasticity quality assurance phantom using a linear probe (VeraSonics, L7-4).

Original languageEnglish
Title of host publication2017 IEEE International Ultrasonics Symposium, IUS 2017
PublisherIEEE Computer Society
ISBN (Electronic)9781538633830
DOIs
Publication statusPublished - 2017 Oct 31
Externally publishedYes
Event2017 IEEE International Ultrasonics Symposium, IUS 2017 - Washington, United States
Duration: 2017 Sep 62017 Sep 9

Publication series

NameIEEE International Ultrasonics Symposium, IUS
ISSN (Print)1948-5719
ISSN (Electronic)1948-5727

Conference

Conference2017 IEEE International Ultrasonics Symposium, IUS 2017
Country/TerritoryUnited States
CityWashington
Period17/9/617/9/9

Keywords

  • Elasticity Image
  • Measurement Time Improvement
  • Orthogonal Golay Code
  • Signal-To-Noise-Ratio Improvement

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

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