Which factor can cause excessive image receptor exposure while using AEC?

When using Automatic Exposure Control (AEC) systems, the selection of the radiation detector is pivotal in determining the quality and quantity of exposure the image receptor receives. If the radiation detector selected is not appropriate for the specific examination or is positioned incorrectly, it can lead to excessive exposure of the image receptor.

For instance, if a detector is too sensitive or is improperly placed relative to the area of interest, it may trigger the exposure prematurely or allow more radiation to reach the receptor than intended. This can result in increased exposure, leading to overexposed images that are difficult to interpret and may require repeat imaging.

While the other factors, such as the image processing algorithm, film type, and collimator settings, are indeed important in the imaging process, they do not directly influence the initial exposure level controlled by the AEC system as significantly as the choice and positioning of the radiation detector. Thus, understanding the function and type of radiation detector is crucial for preventing excessive image receptor exposure in AEC systems.