目的了解冠状动脉血管成像技 术(CTA)定量评估指标与心肌缺血事件的 相关性。方法 选取2015年9月-2017年8月 经本院放射科进行冠状动脉血管成像患者 共157例，根据有无心肌缺血事件将患者 分为两组：心肌缺血组和无心肌缺血组， 所有均进行冠状动脉CTA检查，将原始数 据调入工作站对冠状动脉及分支中狭窄率 超过25%的血管进行斑块分析，后处理工 作站自动获取钙化积分、斑块体积、斑块 负荷、狭窄程度和重建指数等客观指标， 对比CTA定量评估指标在心肌缺血中的差 异性及其与心肌缺血事件的相关性。结 果 心肌缺血组患者的钙化积分、斑块负 荷、狭窄程度及重建指数均高于无心肌缺 血组，差异有统计学意义(P＜0.05)，而 斑块体积在两种患者中差异无统计学意义 (P＞0.05)。钙化积分、斑块负荷、狭窄 程度及重建指数与心肌缺血事件呈显著正 相关性，具有统计学意义(P＜0.05)。结 论 冠状动脉CTA检查通过客观的定量指标 可以评估心肌缺血事件，可以广泛应用于 临床。

Objective To investigate the correlation between quantitative evaluation index of coronary angiography (CTA) and myocardial ischemia. Methods A total of 157 patients underwent coronary angiography in the radiology department of our hospital in September 2015-2017 August, the original data were transferred to workstations for plaque analysis of coronary arteries and branches with stenosis exceeding 25%. The postprocessing workstation automatically obtains the objective indexes such as calcification integration, plaque volume, plaque load, stenosis degree and reconstruction index, and compares the difference of CTA quantitative evaluation index in myocardial ischemia and its correlation with myocardial ischemia events. Results The calcification score, plaque load, stenosis degree and reconstruction index of myocardial ischemia group were higher than those without myocardial ischemia group, the difference was statistically significant(P<0.05), and plaque volume was no statistically significant difference in two patients (P>0.05). There was a significant positive correlation between calcium integration, plaque load, stenosis and reconstruction index and myocardial ischemia, which was statistically significant (P<0.05). Conclusion Coronary artery CTA examination can evaluate myocardial ischemic events by objective quantitative indicators, which can be widely used in clinic.