... Helpers/helping persons 23, 28– Image intensifiers, surgical 35 –41– Image quality (see there) 21, 29 30 – Indication, justifying 21, 23, 28– Instructions, X-ray machine 24– Leakage radiation 33 , 36 37 – ... X-ray/radiation protection 28Instruction, X-ray machine 24Intensive care unit 110International Commission on Radio logical Protection (ICRP) 23 Interrupt circuit 33 , 35 Iso C-arm 56Iso-C3D ... 84– Positioning 218Shunt arms, position-related 119Skin and soft tissue injuries, positioning 117Skin disinfection 1 13 Skull clamp 1 23 Sliding gantry (see also VIWAS) 66–67Sliding rail...