Based on the dataset of the male Visible Human and the VOXEL-MAN software, original work for 3D representation of acupoints and acupuncture treatment has been reported. To get a realistic model, segmentation is one of the most important procedures in the whole process. The interactive segmentation of objects on the basis of ellipsoidal regions in RGB-space greatly enhances the realism of 3D reconstructions of the Visible Human datasets. Furthermore, this article describes a double-ellipsoids method in RGB-space for the specific segmentation of muscles originally from our mass of work. The whole process can be interactively controlled by an operator via the tools developed by VOXEL-MAN. Some ideal results have been achieved in a short time.