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Proceedings Paper

A novel portable device for crawling waves sonoelastography: experimental study
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Paper Abstract

Crawling Waves Sonoelastography (CWS) is an elastography technique based on an interference pattern produced by the application of two external vibration sources. In this study, a 3D printed holder was designed to overcome the compatibility limitations of normal excitation modules for different ultrasound systems, previously developed in the literature. This holder was assembled with a transducer and two voice coil actuators, and its performance was tested in homogeneous and inclusion tissue-mimicking phantom. A phase derivative estimator was used to reconstruct the shear wave speed (SWS) map. The coefficient of variation (CV), bias and contrast- to-noise ratio (CNR) were used as quantitative metrics for comparison. These metrics have shown a comparable SWS estimation in the background (SWSb) of the homogeneous phantom with previous studies (e.g. SWSb = 3.58± 0.42 m/s). In the same way, the SWS of the inclusion (SWSi) was distinguished from the background with an accurate SWS value (e.g. SWSi = 5.64 ±0.42 m/s and SWSb = 3.70 ±0.16 m/s). The results suggest that the portable device is capable of achieving a good performance according to their values of bias, CV and CNR. The extension of this work is oriented to ex vivo and in vivo experiments.

Paper Details

Date Published: 3 January 2020
PDF: 12 pages
Proc. SPIE 11330, 15th International Symposium on Medical Information Processing and Analysis, 113300U (3 January 2020); doi: 10.1117/12.2542483
Show Author Affiliations
Pedro A. Ancajima, Pontificia Univ. Católica del Perú (Peru)
Stefano E. Romero, Pontificia Univ. Católica del Perú (Peru)
Eduardo A. Gonzalez, Johns Hopkins Univ. (United States)
Benjamín Castañeda, Pontificia Univ. Católica del Perú (Peru)

Published in SPIE Proceedings Vol. 11330:
15th International Symposium on Medical Information Processing and Analysis
Eduardo Romero; Natasha Lepore; Jorge Brieva, Editor(s)

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