A comparative study between parallel and normal excitation for crawling wave sonoelastography

Stefano E. Romero, Eduardo A. Gonzalez, Roberto Lavarello, Benjamin Castaneda

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

10 Scopus citations

Abstract

Crawling wave sonoelastography (CWS) provides quantitative stiffness information from an examined tissue by the application of two mechanical vibrations that generates an interference pattern which is analyzed to reconstruct a shear wave speed (SWS) image. While CWS performance using parallel excitation setup (PES) has been widely studied in the literature, its implementation is complicated to apply in tissue (i.e. breast,liver) because often requires a normal excitation setup. The aim of this study is to validate the SWS estimation using a normal excitation setup with two different types of coupling attachments for the surface -i.e. surface plate (SP), rounded head (RH)-and perform a quantitative comparison among the three techniques (PES,SP,RH) in homogeneous and heterogeneous gelatin phantoms.The comparison of the three excitation methods was performed using signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), coefficient of variation (CV) and bias over a range of excitation frequencies.The results in the background (PES:3:74 - 0:14 m/s, SP: 3:43 - 0:14 m/s and RH: 3:32 - 0:07 m/s) and in the inclusion (PES:4:96 - 0:18 m/s, SP: 4:88 - 0:32 m/s and RH: 4:64 - 0:29 m/s) show that both normal excitation setups are comparable to the PES to estimate the SWS. This suggests that this type of setup could be used for ex vivo and in vivo analysis.

Original languageEnglish
Title of host publication12th International Symposium on Medical Information Processing and Analysis
EditorsEduardo Romero, Natasha Lepore, Jorge Brieva, Ignacio Larrabide
PublisherSPIE
ISBN (Electronic)9781510607781
DOIs
StatePublished - 2017
Event12th International Symposium on Medical Information Processing and Analysis, SIPAIM 2016 - Tandil, Argentina
Duration: 5 Dec 20167 Dec 2016

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume10160
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

Conference12th International Symposium on Medical Information Processing and Analysis, SIPAIM 2016
Country/TerritoryArgentina
CityTandil
Period5/12/167/12/16

Keywords

  • Crawling waves
  • Quantitative elastography

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