螺旋CT三维重建评价筛窦解剖变异及临床意义

目的：探讨应用螺旋CT对筛窦进行三维图像重建，认证筛窦解剖变异及临床意义。材料和方法：应用GE Lightspeed Plus多排螺旋机扫描仪，对75例病例进行筛窦横断面扫描，通过GE W4．0工作站，在三维重建软件支持下作冠状位图像重建。结果：筛窦常见的解剖变异有5种：筛大泡占52％，Onodi气房21％，眶五气房5％，筛凹低位4％，纸样板过度内移7％。结论：经横断面CT扫描，通过三维重建，能够很好地显示筛窦冠状面图像及其解剖变异，为手术提供详细的影像学资料，对鼻内镜外科有重要临床指导意义。

Evaluation of Ethmoid Sinus Variations by Spiral CT Three - Dimensional Reconstruction and its Clinical Significance

Purpose: To evaluate the ethmoid sinus variations by three - dimensional spiral CT images and its clinical significance. Materials and Methods: 75 patients were scanned transversally by GE Lightspeed Plus Multiple Slices Scaner(MSCT) . Coronal and sagittal images of ethmoid sinus were reconstructed with three - dimensional software in GE workstation. Results: 5 kinds of common ethmoid sinus variations were observed,including pneumatization of ethmoid bulla in 52% of patients,Onodi air cell in 21% ,Haller cell (suborbital air cell) in 5% , low ethmoideas foveolas in 40% , and over intromigratiny lamella pa-pyracea in 7% . Conclusion: The coronal images of ethomoid sinus could be showed clearly by three - dimensional reconstruction with transversal images which could provide detailed imagination data for en-doscopic sinus surgery.