A New High-Resolution Spectral Approach to Noninvasively Evaluate Wall Deformations in Arteries
Joint Authors
Brum, Javier
Negreira, Carlos
Ramos, Antonio
Bazan, Ivonne
Ramirez, Alfredo
Source
Computational and Mathematical Methods in Medicine
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-15, 15 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-02-13
Country of Publication
Egypt
No. of Pages
15
Main Subjects
Abstract EN
By locally measuring changes on arterial wall thickness as a function of pressure, the related Young modulus can be evaluated.
This physical magnitude has shown to be an important predictive factor for cardiovascular diseases.
For evaluating those changes, imaging segmentation or time correlations of ultrasonic echoes, coming from wall interfaces, are usually employed.
In this paper, an alternative low-cost technique is proposed to locally evaluate variations on arterial walls, which are dynamically measured with an improved high-resolution calculation of power spectral densities in echo-traces of the wall interfaces, by using a parametric autoregressive processing.
Certain wall deformations are finely detected by evaluating the echoes overtones peaks with power spectral estimations that implement Burg and Yule Walker algorithms.
Results of this spectral approach are compared with a classical cross-correlation operator, in a tube phantom and “in vitro” carotid tissue.
A circulating loop, mimicking heart periods and blood pressure changes, is employed to dynamically inspect each sample with a broadband ultrasonic probe, acquiring multiple A-Scans which are windowed to isolate echo-traces packets coming from distinct walls.
Then the new technique and cross-correlation operator are applied to evaluate changing parietal deformations from the detection of displacements registered on the wall faces under periodic regime.
American Psychological Association (APA)
Bazan, Ivonne& Negreira, Carlos& Ramos, Antonio& Brum, Javier& Ramirez, Alfredo. 2014. A New High-Resolution Spectral Approach to Noninvasively Evaluate Wall Deformations in Arteries. Computational and Mathematical Methods in Medicine،Vol. 2014, no. 2014, pp.1-15.
https://search.emarefa.net/detail/BIM-484547
Modern Language Association (MLA)
Bazan, Ivonne…[et al.]. A New High-Resolution Spectral Approach to Noninvasively Evaluate Wall Deformations in Arteries. Computational and Mathematical Methods in Medicine No. 2014 (2014), pp.1-15.
https://search.emarefa.net/detail/BIM-484547
American Medical Association (AMA)
Bazan, Ivonne& Negreira, Carlos& Ramos, Antonio& Brum, Javier& Ramirez, Alfredo. A New High-Resolution Spectral Approach to Noninvasively Evaluate Wall Deformations in Arteries. Computational and Mathematical Methods in Medicine. 2014. Vol. 2014, no. 2014, pp.1-15.
https://search.emarefa.net/detail/BIM-484547
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-484547