小儿喉腔三维有限元模型构建的方法及意义

Establishment of a three-dimensional pediatric larynx finite element model

目的为预测评估小儿喉腔手术术后喉腔形态和生理功能,基于CT图像构建小儿喉腔有限元模型。方法用MIMICS软件对2014年8月12日、2014年10月8日和2015年10月15日住院治疗的甲状舌管囊肿患儿2例和梨状窝瘘患儿1例CT扫描得到的Dicom图像处理,以材料灰度阈值区分不同的组织结构,采用可视化处理进行三维模型重建。用ABAQUS有限元软件进行有限元网格进行划分。结果实验应用有限元技术,在计算机上建立了一个能够反映儿童喉腔形态特征的有限元模型。通过临床医师的辨认与比较,该模型同喉镜检查结果一致性良好。结论该模型形态较逼真,可用于后续模拟儿童喉腔手术、评估手术预后的研究。

Objective To establish a three-dimensional（3-D）pediatric larynx finite element model. Methods Materialises Interactive Mederical Image Control System was employed to process the DICOM images from a computed tomography（CT）scan of the larynx by means of distinguishing different components using gray-level thresholding for different tissues. All 3-D visualization models of the larynx were only generated by this software. ABAQUS software was used to handle the grid layout of the larynx finite element model. Results A 3-D model that finely represented the morphological characteristics of the pediatric larynx was generated using finite element technology. This model is comparable with the results of laryngoscopy. Conclusion The 3-D finite element model of the pediatric larynx provides a foundation for further study.