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Assessment of longitudinal strain in the Carotid artery wall using ultrasound-based Speckle tracking - validation in a sheep model
KTH, School of Technology and Health (STH), Medical Engineering, Medical Imaging.ORCID iD: 0000-0002-5795-9867
KU Leuven.
KU Leuven.
KU Leuven.
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2013 (English)In: Proceedings of the IEEE International Ultrasonics symposium, 2013, 2013Conference paper (Other academic)
Abstract [en]

Assessment of strain in the longitudinal direction of the arterial wall has been suggested to improve the evaluation of arterial stiffness and atherosclerosis. Recently, we showed the feasibility of ultrasound speckle tracking to assess carotid longitudinal strain in-silico and in-vitro. However, validation in the more challenging in-vivo setting is still lacking. The aim of this study was to validate longitudinal strain assessment in the common carotid artery (CCA) in an animal setup. The left CCAs of five sheep were exposed during Isoflurane anesthesia and sonomicrometry crystals were sutured onto the artery wall to obtain reference longitudinal strain. Ultrasound long-axis images were recorded at baseline and hypertension (Phenylephrine) and an in-house speckle tracking algorithm was applied to estimate longitudinal strain. The estimated strain curves varied cyclically throughout the cardiac cycles, showing a lengthening of the arterial segment in systole. A significant correlation between peak systolic estimated and reference strain was found (r=0.95, p < 0.001). The results indicate the feasibility of arterial longitudinal strain assessment in-vivo using ultrasound speckle tracking.

Place, publisher, year, edition, pages
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Medical Image Processing
URN: urn:nbn:se:kth:diva-137658DOI: 10.1109/ULTSYM.2013.0147ISI: 000336665300145ScopusID: 2-s2.0-84894314016OAI: diva2:679409
IEEE International Ultrasonics symposium, 21—25 July 2013

QC 20140103

Available from: 2013-12-16 Created: 2013-12-16 Last updated: 2014-06-27Bibliographically approved

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