| 张奇瑾,陈起航,吴国庚.巨大气管支气管症的低剂量多层CT表现[J].中国医学影像技术,2011,27(8):1603~1606 |
| 巨大气管支气管症的低剂量多层CT表现 |
| Multi-slice low-dose CT appearances of tracheobronchomegaly |
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| DOI： |
| 中文关键词: 体层摄影术,X线计算机 低剂量 后处理 巨大气管支气管症 |
| 英文关键词:Tomography, X-ray computed Low dose Post-processing Tracheobronchomegaly |
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| 中文摘要: |
| 目的 应用MSCT低剂量扫描及多种后处理技术评价巨大气管支气管症。方法 回顾性分析4例巨大气管支气管症患者的64层CT扫描资料。扫描覆盖整个胸腔,于深吸气末屏气扫描,参数120 kV,40 mA,记录X线有效剂量。后处理包括双侧主支气管轴位重建、MPR、MinIP、VR及CT仿真支气管镜(CTVB)。测量气管、双侧主支气管的矢状径、冠状径及横截面积。结果 4例患者中,最大管腔平面气管矢状径为20.2~37.8 mm、冠状径30.1~42.4 mm、横截面积445.1~1241.0 mm2;右主支气管最大管腔平面的矢状径为13.1~18.9 mm、冠状径为14.5~28.4 mm、横截面积209.6~396.9 mm2;左主支气管最大管腔平面的矢状径为10.7~19.6 mm、冠状径为14.3~22.3 mm、横截面积125.8~324.4 mm2;多发气管憩室2例。低剂量扫描的有效剂量为每次0.59~0.70 mSv(平均0.68 mSv),与常规胸部CT比较降低 93.33%。结论 多层CT低剂量扫描并后处理技术能够准确显示巨大气管支气管症的形态学改变,并大大降低辐射剂量。 |
| 英文摘要: |
| Objective To observe CT manifestations of tracheobronchomegaly (TBM) with MSCT low-dose scanning and post-processing techniques. Methods Four patients with TBM underwent chest 64-MDCT examination with 120 kV and 40 mA. The scanning performed at end-inspiratory covered the entire thoracic cavity. The effective dose was recorded. Axial-reconstruction of the main bronchi and MPR, MinIP, VR, CT virtual bronchoscopy (CTVB) were performed. The maximum sagittal diameter, transverse diameter, the cross-sectional areas of the trachea and the main bronchi were measured. Results In the 4 patients, the maximum sagittal diameter, transverse diameter and cross-sectional area was 20.2—37.8 mm, 30.1—42.4 mm and 445.1—1241.0 mm2 respectively of trachea, 13.1—18.9 mm, 14.5—28.4 mm and 209.6—396.9 mm2 respectively of the right bronchi, 10.7—19.6 mm, 14.3—22.3 mm and 125.8—324.4 mm2 respectively of the left bronchi. Multiple tracheal diverticula were found in two patients. The effective doses were 0.59—0.70 mSv/time (mean 0.68 mSv/time), decreased by 93.33% compared with routine chest CT. Conclusion Low-dose MSCT and post-processing techniques can be used to evaluate the morphological changes of tracheobronchomegaly accurately when decrease the radiological dose obviously. |
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