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。
Methods Observation were done in 30 old patients who successfully underwent myocardial contrast imaging using second harmonic imaging technology.
方法对行超声二次谐波心肌造影的30例患者进行观察。
Methods Observation were done in 30 old patients who successfully underwent myocardial contrast imaging using second harmonic imaging technology.
方法对行超声二次谐波心肌造影的30例患者进行观察。
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