Virtual temporal bone

Objective: To provide the virtual model of the temporal bone for improving 3-dimension (3D) vi-sualization of the inner ear. Methods：Plastination technique was used to make equidistant serial thin sections 1.0 mm in thickness. On SGI workstation, a Contours q-Marching Cubes algorithm was selected to recon-struct the temporal bone and intratemporal structures in 3D, then to view the middle ear, inner ear, and in-tratemporal structures which imitate the scenes observed by the traditional endoscopy. Results: The virtual model of the temporal bone was successfully constructed, with all reconstructed structures being represented individually or jointly and being rotated continuously in any plane. Virtual endoscopy improved 3D visualiza-tion of the middle ear, inner ear, and intratemporal structures. Conclusion. The reconstructed model can be used for the medical students to rehearse or review the surgeries on this part and for the surgeons to develop a new approach for operation. Virtual otoscopy stands as a promising new visualization technique for elucidat-ing the structure and relation of the middle ear, inner ear, and intratemporal structures.     

应用激光快速成形分层实体制造方法复制颞骨

目的　根据颞骨三维重建数据 ,利用快速成形分层实体制造方法复制颞骨实物模型。方法　利用Medview1.0将颞骨三维重建的数据文件进一步转换为STL文件 ,采用Magics6 0软件读取STL文件并进行检查和修补后输入ZIPPYⅢ快速成形机 ,设定加工参数 ,控制层厚为 0 1mm的涂覆纸逐层叠加制作出颞骨纸质实物模型。结果　得到颞骨纸质实物模型 ,实物模型的精度约为± 0 2mm ,符合耳神经外科手术的要求。结论　复制的颞骨实物模型可用于复杂耳神经外科手术的术前策划 ,并可在三维实体模型上进行各种手术操练。     

喉软骨薄层横断面与可视化研究

目的　提供数字化可视人体有关喉软骨横断面的形态学资料和数字化可视模型 ,为影像学诊断及喉外科手术治疗提供形态学依据。方法　从第三军医大学可视化研究组采集的首例中国数字化可视人体数据集中提取会厌软骨上缘至环状软骨下缘的断层图像 ,观察喉软骨的形态结构 ,在SGI工作站上利用面绘制方法对喉软骨进行三维重建和立体显示。结果　断层图像上能清晰显示喉软骨及其骨化区 ,重建结构逼真 ,能展示喉软骨的真实面貌。结论　该数字化可视人体数据集能够较好地重建喉软骨的可视化模型 ,反映喉软骨的形态及其空间毗邻关系。该结果有望应用于喉外科手术的设计和教学。