3D真人侧脑室模型的设计与构建

Design and construction of a three-dimensional lateral ventricle model based on MRI data

目的构建3D真人侧脑室解剖模型,用于显微神经解剖教学和临床手术计划。方法以1例36岁健康成年志愿者176张头颅MRI T2加权二维断层图像图片为原始数据,联合应用Matlab、Geomagic和Maya等软件对原始图像进行预处理,轮廓线提取,三维重建形成3D模型,然后对模型和影像进行关联。结果根据176张原始图像数据成功完成了人侧脑室三维模型的重建,计算证实模型轮廓线与原始图像边缘吻合较好,经过3D模型与MRI数据场关联后所得模型具有更好的视觉效果。所建模型可任意旋转、放缩,从各个角度观察。结论成功构建的模型能够重复观察和研究且不受时间限制,也没有手术的压力。该模型也可为进入侧脑室目标部位提供潜在的外科练习,为后续指导临床实践奠定了基础。

Objective To construct a three-dimensional（3D） anatomic model of the lateral ventricles for teaching microneurosurgical anatomy and clinical surgery planning. Methods The 3D model was constructed with a series of 176 MRIT2 head sections of a healthy male volunteer（36 years old） using software Matlab,Geomagic,Maya,etc.The 176 sections were subjected to management with software Matlab for image preprocessing and contour extracting;the acquired contours were subjected to software geomagic for 3D model constructing,3D-model and image connecting and other processings. Results The 3D model of the lateral ventricles and related structures were successfully constructed using more than 240,000 remodeled polygons,and the contour of the model consisted well with the images.The model had a even better visual effect after combining the 3D-model and image.The model could be viewed from any angle and could be rotated by 360 degrees in any plane using any structure as the focal point of rotation.Moreover,the model could be reduced or enlarged using the zoom function. Conclusion The constructed 3D model can be observed and studied repeatedly at any time,with no stress from surgery.The model may be used for interactive surgical exercises,paving a way for subsequent clinical practice.