摘要
目的:探讨16排螺旋CT低剂量扫描在胸部外伤检查中的应用价值。方法:对30例胸部外伤患者行首诊常规剂量(200 mAs)及短时间内复查低剂量(50 mAs)CT扫描,比较两种检查方法对胸外伤引起的病变的诊断价值、图像质量及辐射剂量。结果:两种检查方法对胸外伤引起病变的影像显示无差异,图像质量良好,纵隔窗图像噪声略增大,但不影响诊断,同时大幅度降低患者的辐射剂量,容积CT剂量指数(CTDIvol)及剂量长度乘积(DLP)平均下降了75%。结论:16排螺旋CT低剂量CT扫描适用于胸部外伤患者的检查,在获取能够满足临床和影像医师诊断需要的图像前提下,降低患者的辐射剂量,有效保护受检者,大幅度的降低了球管消耗,减少了设备的耗损,延长了设备的使用寿命。
Objective：To assess the diagnostic value of low-dose 16 slices helical CT study in thoracic injury.Method：30 patients with thoracic trauma underwent standard-dose（200 mA） CT study and low-dose followup CT study （50 mA） within a short period.Diagnostic value,image quality and radiation dose of these two studies were compared.Result：There was no statistical significant difference between the two examinations in revealing injury.Although there was more noise in the low-dose study image in mediastinal window,image quality was acceptable and it did not affect the diagnosis.Low dose CT exam can reduce the radiation dose dramatically.CTDIvol and DLP decrease about 75%on average.Conclusion：The low-dose 16 slices helical CT scan is suitable for thoracic trauma study.On the premise of image quality,this method could not only reduce the radiation dose,but also could extend the device life.
出处
《中外医学研究》
2014年第9期51-53,共3页
CHINESE AND FOREIGN MEDICAL RESEARCH
关键词
低剂量
胸部外伤
Spiral computed tomograph
Low-dose
Thoracic injury
