The lead leaf is the protective layer of the x ray collimator. The lead leaf is made of lead. The material of the lead leaf has a direct obstruction effect on X-ray. Only when the lead leaf is not closed can it pass through X-ray. It plays a positive role in controlling the dose of X-ray.
Beam limiter is a device that aims directly at the human body through X-ray. Because X-ray radiates, the greater the dose, the greater the damage, so it can not scan the human body at will. In order to adjust the dose and output position of X-ray conveniently, the beam limiter is equipped with a lamp to simulate X-ray for positioning adjustment. This lamp is halogen lamp and LED lamp. Halogen lamp is an early lamp, which has been gradually replaced by LED lamp. LED lamp has been widely used. Therefore, the LED lamp also belongs to the protective layer of the beam limiter.
The protective layer of the beam limiter is the main X-ray control part of the beam limiter.