Objective: to have an acoustic densitometry (AD) analysis about the relationship between doses and effects in experiment rabbit liver with second harmonic contrast imaging.
目的：利用实验性兔肝对二次谐波成像中的剂量-效应关系进行声学定量分析。
Objective To evaluate the value of acoustic densitometry (AD) in detecting myocardium damage of the left ventricle secondry to hypoxic pulmonary hypertension (PH).
目的探讨声学密度定量（AD）技术定量评价缺氧肺动脉高压（PH）后左室心肌损害的应用价值。
Purpose: To evaluate the clinical value of tissue doppler imaging (TDI), color kinesis(CK) and acoustic densitometry (AD) in the assessment of non-infarcted regional myocardial function.
目的：采用组织多谱勒成像（TDI）、彩色室壁运动分析（CK）及声学密度测定（AD）评价心梗患者非梗塞区心肌功能的改变。
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