MITK中体绘制算法实现，效果不错，适合初学者-MITK in volume rendering algorithm, good results

This function(s) can be used to interactively view any kind of 3D image volumes like CT and MRI, and for distance measurements or ROI selection in 2D slices. It includes Maximum intensity projections (MIP), Volume Rendering (VR) , Slice render,