1917年澳大利亚数学家Radon首先论证了通过物体某一平面的投影重建物体该平面两维空间分布的公式。他的公式要求获得沿该平面所有可能的直线的全部投影(无限集合)。所获得的投影集称为Radon变换。(In 1917, Australian mathematician Radon first demonstrated the formula for reconstructing the two dimensional spatial distribution of an object through the projection of a plane of an object. His formula requires the full projection (infinite set) of all possible lines along the plane. The resulting projection set is called the Radon transform.)