颞骨薄层横断层解剖与多层螺旋CT图像对照研究

Contrast study between thin sectional anatomy and multislice spiral CT of temporal bone

目的:获取成人颞骨亚毫米薄层断面数据,为临床诊断和治疗提供薄层断层解剖学依据。方法:选择成年尸体头部3例(颞骨6侧),先使用多层螺旋CT进行颞骨的各向同性扫描,多向MPR技术重建CT图像;后运用冷冻数控铣削技术制成层厚为0.1 mm的颞骨连续横断面图像,最后对二者进行对照观察。结果:同一标本的多层螺旋CT MPR图像与断面图像均能清晰显示耳颞部微细解剖结构,且二者解剖结构具有良好的一一对应关系。结论:①冷冻数控铣削技术是进行颞骨薄层断层解剖学研究的满意方法。②多层螺旋CT的各向同性扫描技术使断层标本与影像解剖的图像完全匹配成为可能。③本研究提供了一组成人颞骨0.1 mm层厚的薄层断面解剖学资料,将成人颞骨的断层解剖学研究推向了0.1 mm水平。

Objective： To provide anatomical bases for imaging diagnosis and surgical treatment of the diseases of temporal bone by obtaining thin-sectional data of adult temporal bone. Methods： Collected 3 head specimens of Chinese adults. After multislice spiral CT isotropic scanning, the images of multisliee spiral CT （MSCT） were obtained by multi-planar reconstrution （MPR）. Then the specimens were sliced into continuous sections with thickness of 0. lmm on transversal plane using the computerized cryomilling technique. The thin transversal sections of temporal bone were investigated and compared with multislice spiral CT images acquired by MPR technique. Results; By using the same specimen we obtained not only the MSCT images but also the thin transversal sections of the temporal bone, thus we can clearly delineate the anatomical details of the temporal bone and the anatomical structure of them,in addition, the results by two methods were consistent with each other. Conclusion： The computerized eryomilling technique is a good method to study thin sectional anatomy of the temporal bone. The multislice CT i- sotropic scanning technique makes it possible that the MSCT images can match the cryoseetoinal anatomy of the same specimen. The study provides the thin sectional anatomic data with thickness of 0. lmm of the adult temporal bone which means the sectional anatomic study of the adult temporal bone has arrived at the level of 0. 1mm.