What is the primary function of inherent and added filtration in the x-ray tube?

The primary function of inherent and added filtration in the x-ray tube is to reduce patient skin dose. Inherent filtration refers to the materials that are part of the x-ray tube itself, such as the glass of the tube or any oil that may be present. Added filtration consists of additional materials, often aluminum, placed in the path of the x-ray beam.

Filtration works by removing low-energy x-rays from the beam, which do not contribute to image formation but do increase the radiation dose to the patient. These low-energy x-rays are more likely to be absorbed by the patient’s skin, increasing the risk of skin damage or radiation-induced conditions. By filtering out these less useful and potentially harmful low-energy x-rays, the overall quality of the beam improves while also decreasing the dose the skin receives, effectively enhancing patient safety without compromising the diagnostic utility of the x-ray images.

This function is crucial in radiation protection, as it helps ensure that the benefits of x-ray procedures outweigh the risks associated with radiation exposure.