title: Crawling Waves Speed Estimation Based on the Dominant Component Analysis Paradigm.
abstract: A novel method for estimating the shear wave speed from crawling waves based on the amplitude modulation-frequency modulation model is proposed. Our method consists of a two-step approach for estimating the stiffness parameter at the central region of the material of interest. First, narrowband signals are isolated in the time dimension to recover the locally strongest component and to reject distortions from the ultrasound data. Then, the shear wave speed is computed by the dominant component analysis approach and its spatial instantaneous frequency is estimated by the discrete quasi-eigenfunction approximations method. Experimental results on phantoms with different compositions and operating frequencies show coherent speed estimations and accurate inclusion locations.
authors: Sección de Electricidad y Electrónica, Pontificia Universidad Católica del Perú, Lima, Peru.
authors: Renán
authors: R
authors: Rojas
authors: Sección de Electricidad y Electrónica, Pontificia Universidad Católica del Perú, Lima, Peru.
authors: Juvenal
authors: J
authors: Ormachea
authors: Department of Biomedical Engineering, University of Rochester, Rochester, NY, USA.
authors: Arthur
authors: A
authors: Salo
authors: Sección de Electricidad y Electrónica, Pontificia Universidad Católica del Perú, Lima, Peru.
authors: Paul
authors: P
authors: Rodríguez
authors: Department of Electrical & Computer Engineering, University of Rochester, Rochester, NY, USA.
authors: Kevin J
authors: KJ
authors: Parker
authors: Sección de Electricidad y Electrónica, Pontificia Universidad Católica del Perú, Lima, Peru castaneda.b@pucp.edu.pe.
authors: Benjamin
authors: B
authors: Castaneda
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D055119:Elastic Modulus; D054459:Elasticity Imaging Techniques / Q000379:methods*; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008954:Models, Biological; D019047:Phantoms, Imaging
keywords: Crawling wave sonoelastography; amplitude modulation–frequency modulation; dominant component analysis; instantaneous frequency estimation; quasi-eigenfunction approximations