What is the primary purpose of a collimator in radiography?

The primary purpose of a collimator in radiography is to limit the exposure area. A collimator is a device used to narrow the beam of radiation emitted from the X-ray tube. By restricting the radiation to only the area of interest, the collimator helps minimize the amount of unnecessary radiation exposure to surrounding tissues, enhancing patient safety.

Additionally, limiting the exposure area by using a collimator contributes to improved image quality. With a smaller area being irradiated, the contrast between different tissues can be enhanced, leading to clearer and more diagnostic images. Overall, the collimator plays a crucial role in optimizing both safety and image quality in radiographic procedures.