What is the function of a collimator in radiography?

The function of a collimator in radiography is to limit the size of the X-ray beam and reduce patient exposure. By restricting the beam's dimensions to the actual area of interest, the collimator minimizes radiation scatter and ensures that only the targeted area of the patient is exposed to X-rays. This is crucial not only for protecting the patient from unnecessary radiation but also for enhancing the overall quality of the diagnostic image by reducing the amount of scatter radiation that can interfere with image clarity.

Furthermore, when the beam is collimated properly, it helps to focus the radiation on the specific anatomical region being examined, which can improve image contrast and resolution. While collimators do not increase the intensity of the X-ray beam and are not specifically designed to enhance image resolution or protect technicians from radiation, they play a vital role in maintaining safety and efficacy in radiographic procedures.