结肠阳性造影CT仿真肠镜对结肠息肉诊断价值

目的 评价结肠阳性造影CT仿真结肠镜用于诊断结直肠息肉的价值.方法 57例疑似或确诊后复查的结直肠息肉患者纳入研究,所有患者先进行结肠阳性对比剂充盈下CT仿真结肠镜检查,然后患者再行电子肠镜检查,影像科医生及内镜医生均在盲法干预下出具各自检查报告,由第三方统计人员统计CT仿真肠镜对结直肠息肉诊断的符合率.结果 以电子肠镜为金标准,则CT仿真结肠镜患者检出敏感度为95.23 %,特异度为 93.33 %;电子肠镜共检出90例息肉,仿真结肠镜共检出125例息肉.仿真结肠镜发现直径在0.3 cm以上的病灶93处,电子内镜有 90 处,对所有检出直径在0.3 cm以上病灶进行点对点比较,二者的吻合率为86.67 %,仿真结肠镜诊断的假阳性率为16.67 %,假阴性率为13.33 %.结论 阳性对比剂充盈下仿真结肠镜能提高结肠息肉的诊断效率.

Comparison of positive contrast-enhanced CT virtual colonoscopy and electron colonoscopy for detecting colorectal polyps

Objective To evaluate the efficacy of contrast-enhanced CT virtual colonoscopy for detecting colorectal polyps. Methods 57 patients with suspected or confirmed colorectal polyps were enrolled in this study. All patients underwent electron colonoscopy （EC） after CT virtual colonoscopy （CTVC） with positive contrast. CTVC results were reviewed by radiologists and the EC by endoscopists. Results 90 and 125 polyps were detected by EC and CTVC respectively. Using EC as gold standard, the sensitivity and specificity of CTVC were 95.23% and 93.33%, respectively. 90 polyps of greater than 0.3 cm in diameter were detected on EC compared with 93 on CTVC with correlation rate of 86.67%. The false positive rate of CTVC was 16.67% with false negative rate of 13.33%. Conclusion Positive contrast-enhanced CTVC improves the detection ofcolorectal polyps.