What consequence might result from not adjusting SID when using AEC?

The correct answer, which highlights the consequence of not adjusting the Source-to-Image Distance (SID) when using Automatic Exposure Control (AEC), centers around the principle of consistent exposure across radiographic images. AEC systems are designed to determine the appropriate exposure time automatically based on the amount of radiation reaching the detectors. When the SID is not adjusted accordingly, this can lead to varying amounts of radiation striking the detectors depending on the distance from the X-ray tube to the image receptor.

Specifically, if the SID is increased without compensating for it in the AEC settings, the amount of radiation reaching the detectors may be reduced, resulting in underexposure. Conversely, if the SID is decreased, there might be an overexposure due to excessive radiation reaching the detectors. Both scenarios can lead to inconsistent exposure across images captured under different conditions, ultimately affecting the overall quality and diagnostic efficacy of the radiographic images.

This critical relationship highlights the importance of maintaining proper SID adjustments relative to AEC settings, ensuring that images are consistently optimized for quality and accuracy.