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目的探讨螺旋CT牙体表面成像的实用方法和技巧。方法对我院2002-08—2004-12共42例由于多种原因行颌面部螺旋CT扫描的患者进行回顾性研究,使用美国GE H ispeed NX/I双层螺旋CT扫描机及ADW 4.0图像处理工作站。结果全部病例的牙列三维立体形态显示良好,可从各个角度完整显示单个牙的表面形态。埋伏牙的形态、大小、位置、方向和与周围牙齿的关系观察明确。结论螺旋CT牙体表面成像技术在口腔正畸治疗中有重要的指导意义。扫描、重建参数的合理选择及图像后处理方法的准确应用是取得高质量三维图像的关键。
Objective To explore the practical methods and techniques of CT imaging of spiral CT. Methods A total of 42 patients undergoing maxillofacial CT scan during 2002-08-2004-12 in our hospital were retrospectively studied. The images were analyzed with GE Hippeed NX / I double-slice CT scanner and ADW 4.0 images Workstation. Results All three cases of dentition showed good three-dimensional morphology, from a single point of view of the complete display of a single tooth surface morphology. The shape, size, location, orientation and the relationship with the surrounding teeth were clearly observed. Conclusion Spiral CT dental surface imaging has important guiding significance in orthodontic treatment. The reasonable choice of scanning and reconstruction parameters and the accurate application of the image post-processing method are the key points for obtaining high-quality 3D images.