Three-dimensional Reconstruction Of Internal Capsule And The Clinical Significance

[objective] To reconstruct three-dimensional structures of the internal capsule(anterior limb,genu and posterior limb included) with ultrathin freezing transection, and get length,width volume and centroid of the internal capsule (anterior limb,genu and posterior limb included). The results provides an important theoretic basis for stereotactic surgery for the multiply diseases of the internal capsule.[Methods] 3 male skulls without structural diseases were selected. Each of these skulls was cut into 190 1-millimeter-thick layers,the photographs was taken with digital camera and the data was put into the computer. Then the border line in layers that contained the internal capsule was drawn with self-made software, the 3-D reconstruction was got and the data was measured. [Results] The midpoint of intercomissural distance was considered as original point of brain and then the centroid coordinates of the internal capsule (anterior limb,genu and posterior limb included) was got. The centroid coordinates of the left internal capsule was( -15.7619mm , 2.2032mm , 10.1438mm ), the right was(17.9320mm,2.6565mm,6.3844mm).The volume of the left internal capsule was 4009.1730mm3,The right was 4217.2340mm3.[Conclusion] The reconstructed internal capsule and its parts which demonstrate the natural shape and exact position of the structures are realistic, they can be displayed in artificial colour andtrue colour. It provides an anatomic basis for stereotactic surgery for the treatment of the vascular disease,functional neurosurgery disease and psychiatrical surgery disease of the internal capsule.