Abstract
The analytic nature of pulse-echo ultrasound allows for displacement tracking with fine axial resolution and strain estimations in tissue (elastography). The use of differential operators in strain calculations, however, can result in noise amplification and loss of specificity. In this paper a new method for direct estimation of Carotid artery wall strain parameters is presented. This method directly estimates the normal (exx, ezz) and shear strains (exz, ezx) on the anterior and posterior walls of human common carotid artery. This method utilizes the properties of local autocorrelation and the relationship between autocorrelation and power spectral density of the analytic RF echo signals. It is also shown that normal and shear strains can be estimated as parameters of an affine transformation. The steps of this new algorithm are based on properties of 2D autocorrelation function of the speckle region undergoing deformation. In vivo results from Carotid arteries of healthy human subjects show consistency over heart cycles.
Original language | English (US) |
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Title of host publication | IEEE International Ultrasonics Symposium, IUS |
Publisher | IEEE Computer Society |
Pages | 1810-1813 |
Number of pages | 4 |
ISBN (Electronic) | 9781479970490 |
DOIs | |
State | Published - Oct 20 2014 |
Event | 2014 IEEE International Ultrasonics Symposium, IUS 2014 - Chicago, United States Duration: Sep 3 2014 → Sep 6 2014 |
Publication series
Name | IEEE International Ultrasonics Symposium, IUS |
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ISSN (Print) | 1948-5719 |
ISSN (Electronic) | 1948-5727 |
Other
Other | 2014 IEEE International Ultrasonics Symposium, IUS 2014 |
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Country/Territory | United States |
City | Chicago |
Period | 9/3/14 → 9/6/14 |
Bibliographical note
Publisher Copyright:© 2014 IEEE.
Keywords
- Affine Transformation
- Autocorrelation
- Carotid Artery
- Elastography
- Speckle Tracking
- Strain Estimation
- Ultrasound