The collimator is used to control the X-ray output irradiation path and control the radiation dose of the machine. Generally, collimators can be divided into three categories according to operation, manual, electric and automatic. Generally, customers ask us what kind of collimator should be equipped with portable X-ray machines. We recommend manual ones. We generally recommend electric ones for gastrointestinal machines. In addition, if you want to buy a collimator, you also need to know whether its various parameters meet your requirements. The most important thing is the maximum and minimum irradiation field, voltage, and lead leaf control mode.