A - Joint plus 1/3 of long bones proximal and distal to joint 关节以及邻近长骨的近端和远端的1/3
B - All joints in the limb 该肢体的全部
C - Joint plus the nearest body cavity 关节以及最近的躯干部位
D - Joint only 只是关节
E - Each bone of the joint should be radiographed individually 该关节的骨骼拍摄相应的独立X光片