Preliminary analysis of strain and strain rate distribution in carotid artery atherosclerotic plaque
- VernacularTitle:颈动脉粥样斑块应变及应变率分布的初步探讨
- Author:
Pengfei ZHANG
;
Yun ZHANG
;
Mei ZHANG
- Publication Type:Journal Article
- Keywords:
Ultrasonography;
Carotid artery diseases;
Atherosclerosis
- From:Chinese Journal of Ultrasonography
2003;0(08):-
- CountryChina
- Language:Chinese
-
Abstract:
Objective To explore the feasibility of ultrasonic examination in the strain(S) and strain rate(SR) of carotid artery atheromatous plaque, and the distribution of S and SR of the atherosclerotic plaques. Methods Tissue velocity imaging(TVI) was used in 26 cases of coronary artery disease(CAD),and 35 atherosclerotic plaques in the carotid artery were found.The peak values of displacement, S and SR in different plaque sites were obtained with Q-analysis software. The estimation of S and SR of same sites was acquired in different parametric settings, including S length, S reject and S scale. Results Different parametric settings had no influence upon the estimation of S and SR. However, significant difference of S and SR could be found in different plaque sites, such as the shoulder, the surface of fibrous cap and the base and it was the same case among different acoustic plaque types. S and SR distribution patterns were similar between angina pectoris group and old myocardial infarction group; yet they were significantly different between acute myocardial infarction group and the former two groups. Conclusions TVI technique and ultrasonic Doppler-based strain imaging method could be used in carotid arteries. Strain concentrated mainly on the surface of fibrous cap and the plaque shoulder. SR of plaque shoulder among three acoustic plaque types was different. From the surface to the base axially, S and SR decreased gradually.
