1. A phantom for controlling a radiation dose, the phantom comprising: a plurality of pixelated solid blocks, each pixelated solid block having a radiation measurement unit embedded therein and having different media and densities, said plurality of pixelated solid blocks being combined in layers and assembled in a three-dimensional voxel type shape, each of said plurality of pixelated solid blocks being suitable for density corresponding to each of a plurality of three-dimensional voxel type pixels in the three-dimensional voxel type shape.