Objective: To assess the compliant properties of the Common Carotid Artery (CCA) in healthy subjects and patients with essential hypertension based on strain-strain rate imaging.

目的：应用应变和应变率显像技术对正常人和原发性高血压患者颈总动脉壁顺应性特点进行研究。

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Objective To study the influence of incidence angle of ultrasound and strain length(SL) on strain imaging(SI) and strain rate imaging(SRI) in long-axis direction.

目的探讨室壁与入射超声之间的夹角及应变长度（SL）对长轴方向应变成像（SI）和应变率成像（SRI）的影响。

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Objective to study the velocity, strain and strain rate of the carotid arterial wall motion using velocity vector imaging (VVI) in cerebral infarction patients.

目的应用速度向量成像(VVI)技术初步探讨脑梗死患者颈总动脉管壁短轴方向运动速度、应变及应变率的特点。

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