Image intensifier is a device for perspective inspection. Different size image intensifiers are used in different types of X-ray machines. At present, 9-inch image intensifier is widely used. The three types of 9-inch image intensifier in Newheek are NK-23XZ-IV X-ray image intensifier 9″,”NK-23XZ-III X-ray image intensifier 9″and”NK-23XZ-II X-ray image intensifier 9″. The nominal incident field size of the 9-inch image intensifier is 230mm (9 inch), which is mainly suitable for small C-arm (orthopaedics), gastrointestinal machine, digital machine, industrial tire hub detection, etc. The technical performance and use of these three types of 9-inch image intensifier are not very different, mainly because of the different appearance. Customers can choose according to their own preferences.