基于影像的人体铸型标本三维计算机建模研究

Image-based three-dimensional reconstruction of human casting specimen

目的开展基于影像的人体铸型标本的三维计算机建模研究。方法采集小腿铸型标本(有骨和动脉结构)以及肺铸型标本(有肺动脉、肺静脉及支气管结构)各1件,将小腿铸型标本与肺铸型标本进行CT扫描。将CT数据导入三维重建软件Mimics13.01(Materialise公司,比利时)对图像进行三维重建。利用软件自带的阈值设定(Threshold)、图像编辑(Edit)、区域增长(Region growth)等功能可对选定的结构进行图像分割,采用软件的三维计算功能(3D calculation)重建人体小腿铸型标本及肺铸型标本的三维模型。结果获得小腿铸型标本CT图像共获得1310层图像,层厚为0.2mm,肺铸型标本CT图像共获得674层图像,层厚为0.4mm。经过三维重建可获得小腿铸型标本和肺铸型标本的三维模型,与原始的铸型标本相比,三维重建模型可清楚直观地再现小腿铸型标本及肺铸型标本的三维形态,能够满足临床应用。结论对人体铸型标本开展图像三维重建研究,将使人体铸型标本更好地应用于临床,可为进一步进行快速成型制造及相关数字医学研究奠定基础,并将产生很好的社会及经济效益。

Objective To reconstruct the three-dimensional models of anatomical duct casting specimens.Methods The anatomic casting models of a lung along with a trachea,artery and vein,and a leg along with bone artery were harvested and scanned by CT scan.The CT data were imported into the software Mimics to reconstruct the three-dimensional models of every part of the anatomic casting models using the function＂Threshold＂,＂Edit＂,＂Region growth＂,etc.Results The three-dimensional models of casting specimens of lung and leg were well reconstructed.The detailed structures,such as artery,vein and trachea of casting specimen of lung,arteries of casting specimen of leg could be clearly shown.Conclusions The three-dimensional reconstruction can help the anatomical casting specimens to be more useful for medical study and work.Further these three-dimensional reconstructed models can be used to rapid prototype production and other digital medical research.