不同剂量腹部增强CT诊断急性阑尾炎的对比研究

目的探讨不同剂量腹部增强CT对急性阑尾炎的诊断价值。方法选取2009年1月～2012年1月拟诊为急性阑尾炎的88例患者,随机分为观察组和对照组,观察组进行低剂量腹部增强CT扫描,对照组进行常规剂量腹部增强CT扫描,比较诊断效果和患者受照射剂量。结果观察组有效毫安秒为(80±25)mAs,扫描剂量为(9.2±3.2)mGy,对照组有效毫安秒为(192±44)mAs,扫描剂量为(23.0±6.2)mGy,两组比较差异显著(P<0.05),两种检查方法对急性阑尾炎诊断的敏感度、特异度、阳性预测值、阴性预测值、准确度差异不明显(P>0.05)。结论低剂量腹部增强CT在不降低诊断价值的前提下,可明显减低患者受辐射剂量。

Objective To investigate the diagnostic value of different doses of abdominal enhanced CT for acute appendicitis. Methods 88 patients in hospital with suspected acute appendicitis from January 2009 to January 2012 were randomly divided into observation group and control group, in which the observation group were performed with the low-dose abdominal enhanced CT scan and the control group were performed with conventional-dose abdominal enhanced CT scan.They were compared with diagnostic effectiveness and radiation dose exposure on patient. Results the observation group effective MAS was（80±25）mAs,scanning dose was（9.2±3.2）mGy , the control group MAS was（192±44）mAs,scanning dose was （23±6.2）mGy , there was significant difference between two groups （P〈0.05）. There were not significantly difference when compared to with the sensitivity, specificity, positive predictive value, negative predictive value and accuracy with two methods of CT scanning for acute appendicitis （P〈0.05）. Conclusion Low dose CT scanning can significantly reduce the radiation dose on patient with no reducing the diagnostic value.