Taking Randall Munroe’s excellent Radiation Dose Chart and a Japanese-language version of the same as our data sources, we have visualised radiation doses as spheres (the shaded orange disc above). Each sphere has a volume that is directly proportional to the radiation dose it depicts (1µSv ≈ 16.14cm3). The spheres are shown next to a human figure, adding a human dimension to the comparison while also establishing the scale of each view (we have assumed a height of the figure of 175cm, which is fairly average for an adult male).