Direct estimation of carotid artery wall shear strain parameters using autocorrelation of high frame rate ultrasound images

Yasaman Adibi, Afshin A Divani, Emad S Ebbini

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 languageEnglish (US)
Title of host publicationIEEE International Ultrasonics Symposium, IUS
PublisherIEEE Computer Society
Pages1810-1813
Number of pages4
ISBN (Electronic)9781479970490
DOIs
StatePublished - Oct 20 2014
Event2014 IEEE International Ultrasonics Symposium, IUS 2014 - Chicago, United States
Duration: Sep 3 2014Sep 6 2014

Publication series

NameIEEE International Ultrasonics Symposium, IUS
ISSN (Print)1948-5719
ISSN (Electronic)1948-5727

Other

Other2014 IEEE International Ultrasonics Symposium, IUS 2014
Country/TerritoryUnited States
CityChicago
Period9/3/149/6/14

Keywords

  • Affine Transformation
  • Autocorrelation
  • Carotid Artery
  • Elastography
  • Speckle Tracking
  • Strain Estimation
  • Ultrasound

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