Why are filters utilized in X-rays?

The utilization of filters in X-ray imaging primarily serves to remove low-energy photons from the X-ray beam. Low-energy photons often do not contribute to the quality of the image; instead, they can increase patient exposure to unnecessary radiation without providing valuable information. By filtering out these low-energy photons, the X-ray system can produce a clearer image with better contrast and reduce the overall radiation dose to the patient. This practice enhances the efficiency of the imaging process, focusing on the photons that contribute meaningful diagnostic information while minimizing patient risk.

While enhancing image quality and potentially impacting exposure times may seem relevant, the fundamental purpose of filtering is about managing energy levels within the X-ray beam to optimize both safety and image outputs. Increasing the radiation dose goes against the principle of minimizing unnecessary exposure in medical imaging.