With the progress of medical science and technology, more and more types of x ray collimator have been developed, which are more and more modern and intelligent. At present, the types of beam limiters include manual beam limiters, electric beam limiters and automatic beam limiters.
Whether it is manual, electric or automatic, it is used to control the closure of the lead leaf in the beam limiter, that is, to control the size of the light field. The instrument panel of the manual beam limiter is on the beam limiter, and the turning knob is controlled by human to open and control the closure degree of the lead leaf, that is, the size of the irradiation field. The electric beam limiter is integrated into the console. The data are adjusted by the caretaker of the console, and the size of the irradiation field is controlled electronically. The automatic beam limiter is equipped with a state detection device with lead leaf inside. With the change of focal screen, the automatic beam limiter has the function of automatically adjusting the size of the irradiation field. The more types of beam limiters are, the better they can meet the needs of customers.