Cross-Sections of Polyhedra

Kyuta visits his friend who was in hospital. When he returns home, Gen was there. Gen Hi, Kyuta, where did you go today? Kyu I went to see my friend Kento in the hospital. A soccer ball hit him in the head, and was taken to hospital by ambulance. His head was scanned for injuries. Gen They checked inside his head? Kyu Well, they did not open it; instead, they took tomographic pictures of the inside of his head to check if everything was OK. I think they used a CT scanner.