The paper introduces the design and the implementation of 3D Shepp-Logan head phantom as well the computing of projection data at first,and then describes the simulation process of the three-dimension medical image.

• 首先介绍了3D Shepp-Logan头部模型的设计与实现以及仿真投影数据的计算,进而描述了所设计的三维医学图像重建仿真计算过程。