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Accurate evaluation of viscoelasticity of radial artery wall during flow-mediated dilation in ultrasound measurement.
- Source :
- Japanese Journal of Applied Physics; Jul2016, Vol. 55 Issue 7S1, p1-1, 1p
- Publication Year :
- 2016
-
Abstract
- In our previous study, the viscoelasticity of the radial artery wall was estimated to diagnose endothelial dysfunction using a high-frequency (22 MHz) ultrasound device. In the present study, we employed a commercial ultrasound device (7.5 MHz) and estimated the viscoelasticity using arterial pressure and diameter, both of which were measured at the same position. In a phantom experiment, the proposed method successfully estimated the elasticity and viscosity of the phantom with errors of 1.8 and 30.3%, respectively. In an in vivo measurement, the transient change in the viscoelasticity was measured for three healthy subjects during flow-mediated dilation (FMD). The proposed method revealed the softening of the arterial wall originating from the FMD reaction within 100 s after avascularization. These results indicate the high performance of the proposed method in evaluating vascular endothelial function just after avascularization, where the function is difficult to be estimated by a conventional FMD measurement. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00214922
- Volume :
- 55
- Issue :
- 7S1
- Database :
- Complementary Index
- Journal :
- Japanese Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 116454556
- Full Text :
- https://doi.org/10.7567/JJAP.55.07KF11