| 张洁,马大庆,贺文,徐岩,钟朝辉,郑秀凤.低剂量MSCT结肠成像检测结肠息肉[J].中国医学影像技术,2009,25(6):1043~1046 |
| 低剂量MSCT结肠成像检测结肠息肉 |
| Detecting colonic polyps with low-dose MSCT colonography |
| 投稿时间：2008-10-26 修订日期：2009-03-10 |
| DOI： |
| 中文关键词: 低剂量 体层摄影术,X线计算机 结肠成像 结肠息肉 |
| 英文关键词:Low dose Tomography, X-ray computed Colonography Colonic polyps |
| 基金项目: |
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| 摘要点击次数: 1922 |
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| 中文摘要: |
| 目的 评估低剂量MSCT结肠成像检测结肠息肉的敏感度和特异度。方法 158例可疑结肠息肉患者进行低剂量MSCT结肠成像及结肠镜检查,其中正常组43例,息肉组115例。以结肠镜和术后病理结果相结合作为判定标准,计算低剂量CT结肠成像检测结肠息肉的敏感度和特异度,并记录俯卧位与仰卧位扫描总的CT剂量指数(CTDI)。结果 低剂量MSCT结肠成像在115例患者中共发现240个息肉。对于≥10.0 mm的息肉,低剂量CT结肠成像的检测敏感度和特异度分别为98.90%和97.60％。对于5.1~9.9 mm的息肉,其检测敏感度和特异度分别为86.40%和88.60%。对于≤5.0 mm的息肉,其检测敏感度和特异度分别为60.40%和65.20%。仰卧位和俯卧位扫描总的CT有效剂量指数为7.64 mGy,比常规剂量扫描降低约36.3%~77.5%。结论 低剂量MSCT成像对于检测＞5.0 mm的息肉,有较高的敏感度和特异度。 |
| 英文摘要: |
| Objective To evaluate the sensitivity and specificity of low-dose MSCT colonography in the detection of colorectal polyps. Methods A total of 158 patients with suspected colonic polyps underwent low-dose MSCT colonography and conventional colonoscopy, 43 patients of them were normal and 115 patients had at least 1 polyp. Conventional colonoscopy combined with pathologic findings served as a reference standard. The sensitivity and specificity were calculated. CT dose index (CTDI) in prone combined supine position was recorded. Results Total 240 polyps in 115 patients were found with MSCT colonography. For polyp size ≥10.0 mm, 5.1-9.9 mm and ≤5.0 mm, the sensitivity and specificity was 98.90% and 97.60%, 86.40% and 88.60%, 60.40% and 65.20%, respectively. The general CTDI for prone and supine was 7.64 mGy, less than regular dose. Conclusion Low-dose MSCT colonography has excellent sensitivity and specificity for detection of colonic polyps larger than 5 mm. |
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