The lead leaf and lens of the x ray collimator are important parts of the beam limiter. The quality of the beam limiter is related to the lens and the lead leaf.
The function of the beam limiter is to control the field of X-ray and the direction of X-ray. Lead leaf and lens in beam limiter are very important components. Lead leaf is the shielding layer of X-ray and plays the role of blocking rays. The closure degree of lead leaf determines the size of X-ray beam and the radiation field of X-ray. Once the lead leaf of beam limiter has problems or the lead leaf cannot be closed tightly, X-ray will leak out and radiate things around it. Therefore, attention should be paid to the lead leaf in judging the quality of the beam limiter. Reflector in beam limiter also has a very important role, mainly used to reflect X-ray, if there is dirt on the lens in beam limiter, it will affect the emission of X-ray, directly affect the quality and dose of X-ray, leading to the inability to judge the dose of X-ray, low quality of diagnosis and treatment, so we should pay attention to the lens in judging the quality of the beam limiter.