Radiation imaging system for inspecting railroad cars (T), comprising: - a Abtastungsarm (10) having a rigid middle inclined portion (6), an upper horizontally extending section (8) and a lower horizontally extending portion (8 '), wherein the rigid middle inclined portion (6) between one end of the upper horizontally extending portion (8) above and an end of the lower horizontally extending portion (8 ') is arranged below, and a damping element (4, 4') which respectively between the upper and (the lower horizontally extending portion 8, 8 ' is) and a seat (S) arranged on a construction; - a detector support (7) with detector array whose upper surface is vertically fixed to the upper horizontally extending portion (8); - a radiation source (5), which is connected to a carrier (11) ', is fixedly connected so that the radiation source (5) to the lower horizontally extending portion (8 to the lower horizontally extending portion (8)') attached is; - a proofreader ...