关键词: 三维重建, 质心

Abstract: To get the three-dimensional images and determine the data of the centroid and the volume of the lenticular nucleus(putamen and pallidus included). Methods A frozen human brain was cut into 190 sections with 1-millimeter-thick and photographs were taken with digital camera.Then the border line in layers that contained the lenticular nucleus was drawn with self-made software and three-dimensional reconstruction was performed. Results The three-dimensional reconstruction image could be rotated，cut and was easy to measure.The midpoint of intercomissural distance was considered as original point of brain and then the centroid coordinates of the lenticular nucleus，putamen and pallidus through coordinate transformation were obtained.The volume of the left lenticular was (7 720.927±0.4)mm³,the right was (8 000.662±0.7)mm³.The centroid coordinates of the left lenticular nucleus was (－20.091 0±0.4)mm,(－8.432 0±0.2)mm,(11.235 7±0.3)mm;the right was(21.679 8±0.4)mm，(－10.701 1±0.4)mm，(5.350 4±0.5)mm.Conclusion The three-dimen sional reconstruction of the lenticular nucleus is a part of the Project of Digital Human Body.The measurement of the centroid coordinates can make a theoretical basement for the aimed treatment of Parkinson’s disease and Dancing disease.

Key words: three-dimensional reconstruction, centroid