Polygonization is the main approach to rendering implicit surface, for the most of graphic systems use built in hardware to display polygons.
绘制多边形可借助图形系统的硬件来实现，因此，隐式曲面的多边形化是隐式曲面绘制的主要方法。
Surface rendering algorithms use micro-surfaces to fit the objects' surface, the results of which just show the outer surfaces of tissues, can not display the inner structures in deep levels;
面绘制算法通过生成面片来拟合物体表面，绘制结果只能展现人体组织表面信息，而无法表达数据场中深层次人体组织的三维结构；
The surface rendering extracts isosurface from 3D volume data, and then uses traditional graphical technology to display.
面绘制从三维体数据中抽取物体等值面，通过传统的图形学进行显示；
The surface rendering extracts isosurface from 3D volume data, and then uses traditional graphical technology to display.
面绘制从三维体数据中抽取物体等值面，通过传统的图形学进行显示；
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