The x-ray field must be centered accurately to within what percentage of the source-to-image distance (SID)?

The x-ray field must be centered accurately to within 2% of the source-to-image distance (SID) to ensure optimal image quality and minimize radiation exposure. This percentage is established to ensure that the x-ray beam is well-aligned with the area of interest and helps prevent the incidence of clipping or excessive exposure to surrounding tissues. Proper alignment contributes to the formation of high-quality images, enabling accurate diagnosis and reducing the likelihood of retakes, which can increase patient exposure to radiation. Maintaining the 2% standard plays a critical role in the overall effectiveness and safety of radiographic imaging practices, aligning with established quality control protocols.