Objective To study the association between the time from injury to examination and CT manifestations for the patients with gastric and bowel closed injury perforation.Methods Clinic materials and CT features of 54 patients with bowel and gastric closed injury perfora tion confirmed by surgical operation were collected.The patients were divided into several groups according to the time from injury to CT exam.The association between the time from injury to exam and CT manifestations for the patients was retrospectively analyzed.Results There was significant difference between the display rate of pneumoperitoneum on CT with the patients who were taken examination within 8 hours and those beyond 8 hours(P0.05).Generally,the display rate of ascites on CT was relatively higher(88.9%).Conclusion There was significant the association between the time from injury to exam and CT manifestations of pneumoperitoneum.CT feature of pneumoperitoneum in parts of the patients may be negative within 8 hours after injury.Aimed at the patients with only non-characteristic manifestations such as ascites on early CT exam,intimately observed and repeat CT examination should be done to confirm diagnosis and to avoid the chance of surgery treatment delayed.

目的通过比较X线数字融合断层技术与普通DR摄影检查技术、CT三维重建技术在颞骨茎突测量的准确程度,探讨X线数字断层融合技术在茎突综合征诊断中的价值。方法用数字X线机和多层螺旋CT分别进行普通DR摄片、数字融合断层摄影和CT扫描检查24例茎突综合征患者。在各自的后处理工作站上重建调整检查图像,测量三种检查方法下同一个体茎突正侧位长度和角度。结果数据显示,数字X线断层与CT三维重建在茎突正位上测得的长度、内倾角和侧位上测得的前倾角,两者差异无统计学意义(P>0.01),侧位断层图像上测量茎突的长度明显小于CT的测量值,差异有统计学意义(P<0.01);而普通DR摄影检查茎突所得各个数值与CT三维重建所测量数值差异明显,差异有统计学意义(P<0.01)。结论用X线数字断层融合技术测量茎突基本上可达到CT测量的标准而且该技术操作简单,辐射量小,相对经济,应成为茎突综合征患者的首选影像学检查方法,X数字断层技术测量茎突长度应以正位为准。