Viscoelasticity measurement of heart wall in in vivo

Author

Kanai, Hiroshi

Author_Institution

Dept. of Electron. Eng., Tohoku Univ., Sendai, Japan

Volume

1

fYear

2004

fDate

23-27 Aug. 2004

Firstpage

482

Abstract

By measuring the spatial distribution of the minute vibrations in the heart wall from the chest wall using ultrasound, we find that some impulses propagate along the heart wall in healthy human subjects just after closure of the aortic valve for the first time. Their amplitude is found to be on the order of several tens of micrometers, and up to 100 Hz. Their propagation speed shows frequency dispersion, which agrees with the theoretical characteristics of the Lamb wave. The instantaneous viscoelasticity of the wall is then noninvasively determined. These findings have a novel potential for myocardial tissue characterization in clinical diagnosis.

Keywords

acoustic signal processing; biological tissues; biomedical ultrasonics; echocardiography; medical image processing; surface acoustic waves; vibration measurement; viscoelasticity; Lamb wave theoretical characteristics; aortic valve closure; chest wall; clinical diagnosis; frequency dispersion; heart wall; in vivo measurement; minute heart wall vibrations; myocardial tissue characterization; ultrasound; viscoelasticity measurement; Elasticity; Frequency; Heart valves; Humans; In vivo; Time measurement; Ultrasonic imaging; Ultrasonic variables measurement; Vibration measurement; Viscosity;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 2004 IEEE

ISSN

1051-0117

Print_ISBN

0-7803-8412-1

Type

conf

DOI

10.1109/ULTSYM.2004.1417767

Filename

1417767