结论：可应用心肌灌注标准差靶心图中的量化参数评价陈旧性心肌梗塞区心肌细胞部分存活并经PT CA治疗有效。

Conclusion: Assessing myocardial viability and the treatment of PTCA by myocardium perfusion quantitative parameter in patients with old myocardium infarction is a useful method.

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目的：探讨心肌灌注量化参数对陈旧性心肌梗塞区心肌细胞活性估测价值。

Objective: To evaluate the clinical value of myocardium perfusion quantitative parameter in patients with old myocardium infarction in assessing myocardium viability.

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目的：探讨组织谐波成像（THI）后应用超声背向散射积分（IBS）评价陈旧性心肌梗塞（OMI）心肌残存收缩能力的优点。

Objective:To study integrated backscatter(IBS)by tissue harmonic imaging(THI)to assess myocardial viability in patients with old myocardial infarction(OMI).

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