<prompt> A 16 film radiographic survey consists of the 12 film survey and the addition4 canine periapicals2 posterior bitewings and 2 occlusal4 permanent molar periapicals2 posterior bitewing, 1 OPG and 1 Lateral cephalogram  <response>: 4 film survey requires 2 anterior occlusal and 2 bitewing radiographs.8 film survey requires 4 posterior, 2 anterior occlusal and 2 bitewing radiographs.12 film survey requires 4 IOPAs for posterior teeth, 4 canine IOPAs, 2 incisor IOPAs and 2 bitewing radiographs.16 film survey requires 4 permanent molar radiographs additional to the 12 film survey.Ref: Principles and practice of Pedodontics by Arathi Rao 