CT和MRI图像融合三维重建颞下颌关节的研究  

Three-dimensional reconstruction of temporomandibular joint with CT and MRI medical image fusion technology

作　　者：林有籁[1] 刘月华[1] 王冬梅[2] 王成焘[2] 

机构地区：[1]同济大学口腔医院正畸科 [2]上海交通大学机械与动力工程学院,上海200240

出　　处：《华西口腔医学杂志》2008年第2期140-143,共4页West China Journal of Stomatology

摘　　要：目的利用CT和MRI扫描图像,探讨采用模型融合技术对颞下颌关节(TMJ)软硬组织进行三维重建的方法,为TMJ生物力学研究及其临床分析提供依据。方法选择1例健康青年男性志愿者,在其双侧TMJ区和颏部共放置12个人造球形标记,经CT和MRI扫描,获取含有所有球形标记的TMJ医学图像,分别采用CT和MRI两套数据建立TMJ软硬组织的三维几何模型。基于人造球形标记在三维空间上配准,对TMJ软硬组织进行三维重建。结果建立了具有良好几何相似性的TMJ三维几何模型,包括关节盘、关节窝、下颌骨和下牙列。TMJ三维几何模型的建立方法简便快捷,模型逼真,解剖结构清楚,能较真实地反映TMJ各结构的空间位置关系。结论利用CT和MRI医学图像融合技术,基于人造球形标记的配准过程进行TMJ三维重建,所建立的模型具有良好的几何相似性。在三维水平上进行图像的融合,具有定位精确,配准过程简单等特点,能真实、合理地对TMJ软硬组织进行三维重建。Objective To investigate the method of the three-dimensional reconstruction of temporomandibular joint （TMJ） on the basis of CT and MRI medical image fusion technology, which establishes good foundation for a series biomechanical studies and clinical analysis. Methods The geometric data for the TMJ model were obtained from a young and healthy male volunteer. Twelve spherical markers were located on the regions of both TMJ and mental tubercles, where CT and MRI scans can reach. The three-dimensional geometric of the hard and soft tissues of TMJ was reconstructed by CT and MRI scans data, which was based on the registration procedures of spherical markers located on the face of the volunteer. Results The three-dimensional geometric model of TMJ was obtained, including hibateral articular disc, mandible, glenoid fossa and inferior teeth, and it had better geometric similarity. The results showed that the methods of three-dimensional reconstruction of TMJ with CT and MRI medical image fusion technology can be operated easily and promptly. The constructed model had good morphology. Conclusion It is feasible to construct the three-dimensional model of TMJ on the basis of the registration procedures of spherical markers and CT-MRI medical image fusion technology. It has the advantage of simulating both hard and soft tissues reasonably. The model well expresses the shape of the TMJ.

关 键 词：医学图像融合 颞下颌关节 三维重建 

分 类 号：R782[医药卫生—口腔医学] R445[医药卫生—临床医学]