目的 探讨隐匿性肋骨骨折MSCT 的最佳复查时间，从而减少漏诊、误诊 及患者的复查次数及辐射剂量，为临床 诊治、工伤及法医学鉴定提供准确依 据。方法 回顾性分析2015年7月到2016 年7月在我院行肋骨骨折复查的患者的CT 资料，筛取初次诊断与最终诊断不符的 患者62例列为差异组，使用配对t检验进 行统计学分析，比较伤后不同复查时间 诊断的肋骨骨折数与初次检查诊断的骨 折数的差异。结果 差异组中62例患者， 伤后第1周、第2周复查所显示的肋骨骨 折数与首次检查显示的肋骨骨折数差异 无统计学意义(P>0.05)，伤后第3周及 以后复查所显示的肋骨骨折数与首次检 查显示的肋骨骨折数差异有统计学意义 (P<0.05)。结论 根据统计结果及骨折愈 合的生理过程，第3-8周复查CT为隐匿性 肋骨骨折最终诊断的最佳复查时间。

Objective To investigate optimal review time of occult fracture by the multislice helical CT, which can provide accurate evidence for clinical diagnosis and treatment of work-related injury, and forensic identification so as to reduce misdiagnosis, patient review times and radiation dose. Methods CT review data between July 2015 and July 2016 of rib fracture patients in our hospital was screened 62 cases as experimental group with different diagnosis to newly diagnosed.Using the paired t test to compare the diverse number of rib fracture between initial examination diagnosis and review in different time. Results The number of rib fracture was no significant difference between first week,second week and newly diagnosed(P>0.05). The number of rib fracture was significant difference since third week(P<0.05). Conclusion According to the statistical results and the physiological process of fracture healing, reexamination at the 3-8 week by CT is optimal review time for the final diagnosis of occult rib fracture.