关键词: 三维重建, 第三脑室体积, 火棉胶, 胼胝体-穹窿间入路

Abstract:

Objective　To provide anatomical basis for surgical resection of the tumor in the anterior and middle of the third ventricle through the three-dimensional reconstruction of the brain midline structure and measurement of the volume of third ventricle.   Methods    10 cases of formalin-fixed specimens of the adult brain were embedded by celloidin (5 males and 5 females) , successive horizontal and coronal sections with the thickness of 500 μm were performed for observation and pictures collecting. The horizontal sections of a female were used for 3D reconstruction and the third ventricle volume in the samples were measured by Amirasoft.   Results   The results of the three-dimensional reconstruction clearly showed the shape and structure of the midline of the brain and adjacent relationship. The average volume of the third ventricle of male was (1170.03±148.04) mm3 and (854.64±43.59) mm3 for women (P>0.05 ), and no significant difference between men and women was detected.    Conclusion    The 3D reconstruction of the cerebral midline structure clearly shows the morphological structure and the interrelationship,which provides morphological basis for removal of the third ventricle tumor through  tanscallosal-interfornical approach. Precise volume measurement of the third ventricle and comparison of differences between men and women provide an important reference data for endoscopic surgery of ventricle.

Key words:  3D reconstruction, The third ventricle volume, Celloidin, Transcallosal-interfornical approach