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Ultrasound speckle tracking for radial, longitudinal and circumferential strain estimation of the carotid artery: An in vitro validation via sonomicrometry using clinical and high-frequency ultrasound
KTH, School of Technology and Health (STH), Medical Engineering, Medical Imaging. KU Leuven, Campus Gasthuisberg OandN1, Belgium.ORCID iD: 0000-0002-5795-9867
KTH, School of Technology and Health (STH), Medical Engineering, Medical Imaging.
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2014 (English)In: Ultrasonics, ISSN 0041-624X, E-ISSN 1874-9968, Vol. 56, 399-408 p.Article in journal (Refereed) Published
Abstract [en]

Ultrasound speckle tracking for carotid strain assessment has in the past decade gained interest in studies of arterial stiffness and cardiovascular diseases. The aim of this study was to validate and directly contrast carotid strain assessment by speckle tracking applied on clinical and high-frequency ultrasound images in vitro. Four polyvinyl alcohol phantoms mimicking the carotid artery were constructed with different mechanical properties and connected to a pump generating carotid flow profiles. Gray-scale ultrasound long-and short-axis images of the phantoms were obtained using a standard clinical ultrasound system, Vivid 7 (GE Healthcare, Horten, Norway) and a high-frequency ultrasound system, Vevo 2100 (FUJIFILM, VisualSonics, Toronto, Canada) with linear-array transducers (12L / MS250). Radial, longitudinal and circumferential strains were estimated using an in-house speckle tracking algorithm and compared with reference strain acquired by sonomicrometry. Overall, the estimated strain corresponded well with the reference strain. The correlation between estimated peak strain in clinical ultrasound images and reference strain was 0.91 (p < 0.001) for radial strain, 0.73 (p < 0.001) for longitudinal strain and 0.90 (p < 0.001) for circumferential strain and for high-frequency ultrasound images 0.95 (p < 0.001) for radial strain, 0.93 (p < 0.001) for longitudinal strain and 0.90 (p < 0.001) for circumferential strain. A significant larger bias and root mean square error was found for circumferential strain estimation on clinical ultrasound images compared to high frequency ultrasound images, but no significant difference in bias and root mean square error was found for radial and longitudinal strain when comparing estimation on clinical and high-frequency ultrasound images. The agreement between sonomicrometry and speckle tracking demonstrates that carotid strain assessment by ultrasound speckle tracking is feasible.

Place, publisher, year, edition, pages
2014. Vol. 56, 399-408 p.
Keyword [en]
Ultrasound speckle tracking, Carotid strain, Vessel phantom, High-frequency ultrasound, Sonomicrometry
National Category
Radiology, Nuclear Medicine and Medical Imaging
Identifiers
URN: urn:nbn:se:kth:diva-158331DOI: 10.1016/j.ultras.2014.09.005ISI: 000345386000046Scopus ID: 2-s2.0-84911967107OAI: oai:DiVA.org:kth-158331DiVA: diva2:783356
Note

QC 20150126

Available from: 2015-01-26 Created: 2015-01-07 Last updated: 2017-12-05Bibliographically approved

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Larsson, Matilda

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