The x ray collimator, also known as the “shield”, “dimmer” or “beam illuminator”, is mounted in the x-tube sleeve window to mask unwanted primary x-rays during X-ray inspection. It x ray collimator the x-ray field to the minimum required range, minimizing the amount of x-ray exposure the patient receives.
The main functions of the beam limiter are summarized as follows:
a. The x ray collimator the field of illumination so that the patient and the operator receive as little radiation as possible.
b. Reduce the area where the secondary rays are generated, and improve the clarity of the perspective and the film.
c. Block leaks as much as possible.