What is the purpose of the collimator in radiographic imaging?

The primary purpose of the collimator in radiographic imaging is to limit the size of the X-ray beam and reduce patient exposure. Collimators are devices that help focus and shape the X-ray beam, ensuring that only the area of interest is irradiated. By restricting the beam to the specific region being imaged, collimators help minimize unnecessary radiation to surrounding tissues, thereby decreasing the overall dose of radiation the patient receives. This is particularly important for patient safety and the principle of as low as reasonably achievable (ALARA) when it comes to radiation exposure.

Additionally, by optimizing the beam’s field size, collators can enhance the quality of the image by reducing scatter radiation, which can further improve the diagnostic yield of the radiographs taken. This functionality plays a crucial role in both protecting the patient and ensuring high-quality imaging results.