基于CT的胎儿双侧肾动脉三维重建

摘要

Objective To explore the method of three-dimensional reconstruction of fetal bilateral renal artery and its application value of three-dimensional visualization model.Methods One case of 31 weeks fresh fetal bilateral kidney specimens was infused with epoxy resin-titanium dioxide and then casted.Obtained the original two-dimensional CT image data sets through CT thin layer scanning of the casting mold.Reconstructed the three-dimensional model of fetal bilateral renal artery with the Mimics 17.0 software, and the model was compared with the casting mold specimen.Results The casting mold specimen of fetal bilateral renal artery clearly showed the shallow blood vessels, but it was difficult to observe the deep renal arteries.On the contrary,the three-dimensional model of fetal bilateral renal artery could help to observe and measure the deep renal arteries accurately,but it failed to show the shallow blood vessels clearly.Conclusion Based on the advantage of the three-dimensional model fetal bilateral renal artery and casting mold specimens,the direction and distribution of fetal bilateral renal arteries could be displayed with stereoscopic multi-level through the combination of virtual and reality,which may provide a reliable morphological data for anatomy teaching and fetal basic medical research information.%目的 探讨胎儿双侧肾动脉三维重建方法及其三维可视化模型的应用价值.方法 对1例31周新鲜胎儿双侧肾脏标本灌注含有二氧化钛造影剂的环氧树脂填充剂并铸型,在铸型基础上行CT薄层扫描获取原始二维断层图像数据集,利用 Mimics 17.0软件重建胎儿双侧肾动脉三维可视化模型,并与铸型标本进行比较分析.结果 胎儿双侧肾动脉铸型标本对浅部血管显示效果好,但对深部血管观察较为困难;胎儿双侧肾动脉三维重建能对深部血管进行观察与准确测量,但对浅部血管显示效果不理想.结论 基于胎儿双侧肾动脉三维模型与铸型标本的优点,通过虚拟与现实相结合方式,可多层面立体地显示胎儿双侧肾动脉血管的走行及分布,为胎儿基础医学研究和解剖教学提供可靠的形态学资料.