Share Email Print

Proceedings Paper

A comparative study between parallel and normal excitation for crawling wave sonoelastography
Author(s): Stefano E. Romero; Eduardo A. Gonzalez; Roberto Lavarello; Benjamin Castañeda
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper 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) of the technique in human tissue 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. (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.

Paper Details

Date Published: 26 January 2017
PDF: 8 pages
Proc. SPIE 10160, 12th International Symposium on Medical Information Processing and Analysis, 101601G (26 January 2017); doi: 10.1117/12.2256816
Show Author Affiliations
Stefano E. Romero, Pontificia Univ. Católica del Perú (Peru)
Eduardo A. Gonzalez, Pontificia Univ. Católica del Perú (Peru)
Roberto Lavarello, Pontificia Univ. Católica del Perú (Peru)
Benjamin Castañeda, Pontificia Univ. Católica del Perú (Peru)

Published in SPIE Proceedings Vol. 10160:
12th International Symposium on Medical Information Processing and Analysis
Eduardo Romero; Natasha Lepore; Jorge Brieva; Jorge Brieva; Ignacio Larrabide; , Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?