【摘要】 目的 探讨双源CT(DSCT)低剂量腹部血管双期扫描成像技术在肠系膜缺血性疾病诊断中的应用价值。方法 50例临床疑诊为肠系膜缺血性疾病的患者行双源CT低剂量腹部血管双期扫描,并选择同期经双源CT常规腹部扫描条件的50例患者作为对照组。对2组图像进行质量评估,同时比较2组患者的有效辐射剂量。结果 50例患者均成功完成DSCT低剂量腹部动静脉血管成像扫描。与DSA及外科手术结果相对比,诊断肠系膜血管及肠管病变准确率为100%。低剂量组患者的平均图像质量评分为(2.1±0.9)分,普通扫描对照组患者的平均图像质量评分为(2.3±1.1)分;低剂量组患者的平均有效剂量为(2.4±0.8)mSv,普通扫描对照组患者的平均有效辐射剂量为(4.2±1.3)mSv,降幅达40%。结论 双源CT低剂量腹部血管双期扫描成像技术具有辐射剂量低、诊断准确率高等优点,是诊断肠系膜缺血性疾病的理想检查手段之一。更多还原

【Abstract】 Objective To evaluate the value of low-dose biphasic dual-source computed tomography(DSCT) angiography in diagnosis of acute mesenteric ischemia(AMI).Methods Fifty patients suspected with AMI underwent low-dose biphasic DSCT angiography.Another fifty patients underwent regular scan as the control group.The image quality and the effective dose of two groups were evaluated.Results A total of 50 patients underwent low-dose DSCT angiography successfully.Compared with percutaneous intra-arterial thrombolysis and embolectomy by arteriotomy,the diagnostic accuracy of DSCT A for vascular and intestinal disease was100%.The image quality scores were(2.1±0.9) and(2.3± 1.1) in low-dose group and control group,respectively.The effective doses were(2.4±0.8) mSv and(4.2±1.3) mSv in low-dose group and control group,respectively,in comparison with the control group,the image quality in low-dose group decreased a little,but the declining rate of the radiation dose decreased to 40%.Conclusion Low-dose biphasic DSCT angiography is a non-invasive with low radiation dose and valuable examination for acute mesenteric ischemia.更多还原