What is the function of the lead collimator in radiography?

The function of the lead collimator in radiography is to limit the size of the X-ray beam and reduce patient exposure. This device is crucial because it helps focus the X-ray beam on the area of interest, minimizing unnecessary radiation exposure to surrounding tissues and organs. By restricting the beam, the collimator not only helps protect the patient but also improves the overall image quality by reducing scatter radiation, which can obscure the details in the radiographic images.

In addition to enhancing safety, limiting the beam size also ensures that the radiographic image captures just the anatomical area that needs to be examined, further contributing to diagnostic accuracy. The effective use of a collimator is an essential practice in radiography, reinforcing the principle of ‘as low as reasonably achievable’ (ALARA) when it comes to radiation exposure.