喉部螺旋CT三维成像技术的应用价值

目的：评价喉部螺旋CT多平面重建及仿真内镜技术，结合轴位对喉部病变的诊断意义和临床应用价值。方法：本组31例经手术病理证实的喉部病变采用东芝Asteion螺旋CT检查，扫描参数为准直3mm，螺距1．O，重建间隔3mm，仿真内镜重建间隔1mm，利用工作站进行图像后处理，选择多平面重建、仿真内镜进行观察。结果：螺旋CT轴位片对病变的敏感性为100％，特异性96．8％，轴位所见均与手术吻合，MPR重建及CT仿真内镜，相互补充可显示更多细节，但诊断符合率并无差别。结论：常规CT轴位结合MPR及CT仿真内镜，使喉部病变的细节显示得到了很大提高，病变定位定性的准确对临床制定治疗方案有重要意义和价值。

Application of helical CT 3D imaging technique in larynx diseases

Objective:To evaluate the efficacy of helical CT multiplanar reconstructions(MPR) and CT virtual endoscopy (CTVE) together with axial view in diagnosis of larynx disease.Methods:37 patients with larynx diseases proved by pathology,were scanned by Toshiba Asteion helical CT,the collimation was 3.0mm,the pitch was 1.0 and the reconstruction interval was 3.0mm (1.0mm of reconstruction interval in CTVE).All source data were postprocessed at workstation using MPR and CTVE.The images were viewed in axial scans and on MPR and CTVE.Results:The sensitivity and specificity of axial scans in the detection of the lesion were 100% and 96.8%,respectively.The findings of axial scans were consistent with operation.MPR and CTVE complementarily provided more information compared to axial scans,but there was not significant difference in the diagnostic accuracy between MPR and CTVE with the axial scans.Conclusion:Helical CT axial images together with MPR and CTVE can improve the detailed demonstration of the larynx diseases.The accurate location and characterization of the disease are important for the planning of clinical treatment.