低剂量CT检查在头部外伤中的诊断价值

Clinical value of low-dose CT diagnosing head trauma

目的：探讨头部外伤诊断中应用低剂量CT检查的临床价值，为临床诊断提供参考。方法选择头部外伤患者48例，初次CT头部检查应用常规剂量进行，复查分别使用70％、50％、30％低剂量CT检查。对比不同剂量CT检查图像结果及射线剂量。结果随着扫描剂量降低，图像优良率大致呈降低趋势，但四种剂量扫描图像优良率相近，对比差异无统计学意义（P＞0．05）；常规剂量扫描时辐射水平达96．59 mGy，随着扫描剂量降低，辐射水平明显降低，低剂量扫描辐射水平与常规剂量对比差异均有统计学意义（ t＝4．293， P＜0．05；t＝7．547，P＜0．01；t＝9．438，P＜0．01）。结论头部外伤应用CT检查时，低剂量CT检查结果可信，辐射剂量小，可优先考虑使用。

Objective To investigate the clinical value of low -dose CT diagnosing head trauma ,providing a reference for clinical diagnosis .Methods 48 patients with head trauma were selected ,routine CT dose was applied in the initial diagnosis ,then 70%,50%,30%（ compared to routine CT dose ） CT dose were applied in review diagnosis . Image results and radiation dose were compared in different doses .Results With the scanning dose reduction ,excel-lent rate of image decreased roughly ,but rates of four doses were similar to each other ,there was not significant statis-tical difference （P〉0.05）;during routine scanning,the radiation level was up to 96.59mGy,with scan dose reduc-tion,radiation levels were significantly lower ,compared with routine radiation level ,low-dose radiation level had sig-nificant statistical difference respecttively （t =4.293,P 〈0.05;t =7.547,P 〈0.01;t =9.438,P 〈0.01）. Conclusion In CT diagnosis for head trauma ,low-dose CT checkups are credible with small dose radiation ,which can be a priority diagnosis option .