目的：探讨64层CT不同重建方法定量评估左心室泵血功能的影响。方法：收集100例冠状动脉CTA患者的影像资料，分别行冠状动脉CTA检查及左心室功能两种不同的重建方法（积分法及分割法）。比较CT两种不同重建方法在评价左心室功能（收缩末期容量、舒张末期容量、每搏输出量、射血分数）方面的相关性，并比较CT两种不同重建方法的平均重建时间的差别。结果：多层螺旋CT两种不同重建法所测定的左心室舒张末期容积、收缩末期容积、每搏输出量、射血分数各数值高度相关（r>0.900，P<0.01），并且两种方法的各项测量值相近，无统计学意义。分割法所使用的重建时间（3 min45 s±23 s）明显短于积分法所示的时间（9 min58 s±47 s）。结论：本研究表明两种不同的CT重建方法在分析左心室功能方面具有较好的相关性，其中分割法在临床应用时可大大降低时间成本，提高工作效率，而且尽可能减少操作者主观因素的影响。

Objective: To discuss the influence of different reconstruction methods of 64-slice CT quantitative assessment of left ventricular pump function. Methods: We collected 100 cases of patients with coronary artery CTA images data. All the patients respectively underwent coronary CTA examination and the reconstruction of the left ventricular function by two different methods(Segmentation and Simpson). Correlation of the two different reconstruction methods in evaluating left ventricular function(LVESV, LVEDV, LVSV, LVEF) was analyzed. Then the average reconstruction time of the two different CT reconstruction methods was compared. Results: The two different reconstruction method for the measurement of LVESV, LVEDV, LVSV, LVEF were highly correlated(r>0.900, P<0.01), and the values of them measured by two different methods were similar with no statistical differences. The reconstruction time of the Segmentation method(3 min45 s±23 s) was significantly shorter than the Simpson method(9 min58 s±47 s). Conclusion: The study shows that two kinds of different CT reconstruction methods in analysis of left ventricular function had high correlation. The Segmentation method in clinical application can greatly reduce the time, improve work efficiency, and minimize the influence of the operator’s subjective factors.