Fundamental performance assessment of 2-D myocardial elastography in a phased-array configuration

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Jianwen LuoElisa E Konofagou

Abstract

Two-dimensional myocardial elastography, an RF-based, speckle-tracking technique, uses 1-D cross-correlation and recorrelation methods in a 2-D search, and can estimate and image the 2-D transmural motion and deformation of the myocardium so as to characterize the cardiac function. Based on a 3-D finite-element (FE) canine left-ventricular model, a theoretical framework was previously developed by our group to evaluate the estimation quality of 2-D myocardial elastography using a linear array. In this paper, an ultrasound simulation program, Field II, was used to generate the RF signals of a model of the heart in a phased-array configuration and under 3-D motion conditions; thus simulating a standard echocardiography exam. The estimation method of 2-D myocardial elastography was adapted for use with such a configuration. All elastographic displacements and strains were found to be in good agreement with the FE solutions, as indicated by the mean absolute error (MAE) between the two. The classified first and second principal strains approximated the radial and circumferential strains, respectively, in the phased-array configuration. The results at different sonographic signal-to-noise ratios (SNR(s)) showed that the MAEs of the ...Continue Reading

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Citations

Dec 17, 2010·Medical Physics·Hao Chen, Tomy Varghese
May 7, 2011·Ultrasound in Medicine & Biology·Jianwen Luo, Elisa E Konofagou
Nov 13, 2015·IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control·Xiaochang PanJianwen Luo
Jul 18, 2016·Ultrasound in Medicine & Biology·He LiWei-Ning Lee
Feb 3, 2011·Physics in Medicine and Biology·Wei-Ning LeeElisa E Konofagou
Dec 30, 2016·Physics in Medicine and Biology·K GijsbertseC L de Korte

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