正常听骨链的CT仿真内镜和三维重建

探讨正常听骨链ＣＴ仿真内镜（ＣＴＶＥ）和三维（３Ｄ）重建方法及其应用价值。材料和方法：２０例无中耳疾病者采用层厚１．０ｍｍ、螺距１．０轴位薄层扫描,骨算法、０．１ｍｍ～０．２ｍｍ间隔重建,分别做ＣＴＶＥ成像、表面（ＳＳＤ）和骨最大密度投影（ＭＩＰ）３Ｄ重建,观察和比较ＣＴＶＥ和３Ｄ显示正常听骨链的能力。结果：ＣＴＶＥ上,锤、砧骨及锤砧关节显示率都是１００％,镫骨底板显示率为３５％,仅２５％能分辨镫

CT Virtual Endoscopy and Three - dimensional Reconstruction of the Normal Auditory Ossicular Chain

Purpose: To evaluate the technique and value of CT virtual endoscopy(CTVE) and three - dimensional (3D) reconstruction of the normal auditory ossicular chain. Materials and Methods: Spiral CT scan of the middle ear was performed with 1. 0mm slice thickness at pitch 1. 0, bone algorithm, and 0. 1 - 0. 2mm reconstruction interval in 20 normal subjects(40 ears). CTVE, maximum intensity projection(MIP) and shaded surface display(SSD)3D were done respectively. The display ability of CTVE and 3D of the normal auditory ossicular chain was investigated and compared each other. Results: CTVE could reveal all of malleus, incus and incudomalleal articulation, and 35% of the stapedial foot - plate but only 25% of the anterior and posterior crura of stapes.Both MIP and SSD 3D could directly display the shape, size and correlation of the malleus and the incus. The incudostapedial joint appeared "L shape". But the footplate, anterior and posterior crura of stapes weren't display clearly.Conclusion: Both CTVE and 3D could clearly exhibit 3D images of the normal auditory ossicular chain, the display ability of CTVE was higher than that of 3D images , and its method is simple and easy.