Conclusion The COPD patients have obvious airtrapping as compared with the normal group, which can be diagnosed and quantitated by pulmonary dynamic CT, which seems to be a promising method.

• 结论COPD患者较正常人有明显的空气贮留，可用肺部动态CT扫描加以诊断和定量，后者是一种可取的，有发展前途的检查方法。