Validation of a newly developed B‐mode image‐processing technique versus wall‐tracking ultrasound for the study of wall mechanics in small‐calibre arteries

Vernhet, Hélène; Demaria, Roland; Juan, Jean-Marie; Oliva-Lauraire, Marie Claire; Quéré, Isabelle; Gariepy, Jérôme; Sénac, J. P.; Dauzat, M.

doi:10.1046/j.1475-097x.2002.00415.x

Cited by 7 publications

(2 citation statements)

References 39 publications

(51 reference statements)

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“…The waveform of vessel diameter and diameter changes over time was automatically generated, and the average systolic and diastolic diameters and diameter changes were calculated (Figure 2). 5 Diameter compliance (Cd) was calculated as Cdϭ2⌬d/⌬P and distensibility coefficient (DC) as DCϭCd/d, where d is diastolic diameter, ⌬P is average systolic-diastolic blood pressure change, and ⌬d is average systolic-diastolic diameter change.…”

Section: Processing Of B-mode Images and Sequencesmentioning

confidence: 99%

Wall Mechanics of the Stented Extracranial Carotid Artery

Vernhet

Jean

Lust

et al. 2003

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Background and Purpose-Abrupt compliance changes and concomitant nonlaminar flow patterns may contribute to endothelial dysfunction and subsequent neointimal thickening. The aim of this study was to test the feasibility of wall mechanics measurement using B-mode ultrasound image analysis by dedicated software in the stented human carotid artery. Methods-Carotid Wallstents (Schneider) were placed in the extracranial carotid arteries of 15 patients. B-mode ultrasound examination was performed with a 7.5-MHz probe on the carotid artery upstream; at the proximal, mid, and distal stent levels; downstream from the stent; and on the contralateral internal and common carotid arteries. Carotid diameter (d) and systolic diameter changes (⌬d) were measured with a dedicated image processing system (IÔ version 3.1, IÔDP), while pulse blood pressure (⌬P) was measured. Diameter compliance (Cd) and distensibility coefficient (DC) were calculated as Cdϭ2⌬d/⌬P and DCϭ2⌬d/⌬P/d and compared between measurement sites. Results-The evaluation could be completed in 8 of 15 patients. Compliance was significantly lower at the proximal, mid, and distal stent levels (27.77Ϯ1.11, 27.38Ϯ1.08, 27.38Ϯ1.09ϫ10 Ϫ3 mm ⅐ kPa Ϫ1 ) than upstream (103.3Ϯ36.7ϫ10

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Section: Processing Of B-mode Images and Sequencesmentioning

confidence: 99%

Wall Mechanics of the Stented Extracranial Carotid Artery

Vernhet

Jean

Lust

et al. 2003

Stroke

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“…This method has been previously validated in the stented rabbit aorta. 13 Diameter compliance (Cd) was calculated as Cdϭ2⌬d/⌬P, where d was the diastolic diameter in mm, ⌬P was the average systolicdiastolic blood pressure change in kPa, and ⌬d was the average systolic-diastolic diameter change in mm. The distensibility coefficient (DC) was defined as DCϭCd/d.…”

Section: Image Processingmentioning

confidence: 99%