Disclosed is a radiation device for the human body inspection. Said method is characterized in that. A ternary discharge gas including neon, xenon and helium fills the discharge space. The second subunit includes a third pivoting part connected to the first pivoting part temporarily. The surface comprises a first tooth in the form of a chamfer at its junction with the maximum gain face, to avoid causing parasitic transverse lasing and the liquid of index nA has a heat capacity of greater than 3000 Joules per kilogram per K\xb0 to dissipate the thermal power induced by the pumping. The thermal capacity per unit surface area of each one of the front surface side roller 48 and the back surface side roller 45 is larger than the thermal capacity per unit surface area of the intermediate transfer belt 41.