目的掌握河南省CT机应用质量水平。方法用CT性能检测模体和CT剂量仪对河南省2007～2008年168台CT机进行影像质量保证检测。结果本次检测二手机139台,一手机29台。一手机和二手机合格率分别为97.8%和72.4%,二手机应用质量明显比一手机差。结论应加强CT机的验收检测和状态检测,强制淘汰质量差的二手CT机。 Objective To master the application quality of CT machine in Henan province. Methods CT performance test phantom and CT dosimeter were used to measure the image quality of 168 CT scanners in Henan province from 2007 to 2008. The results of this test two mobile phone 139, a cell phone 29. The pass rates of one mobile phone and two mobile phones were 97.8% and 72.4% respectively, and the quality of second-hand mobile phones was obviously worse than that of one mobile phone. Conclusions The acceptance inspection and status examination of CT machines should be strengthened to force out the second-hand CT machines with poor quality.