Which factor can cause excessive image receptor (IR) exposure when using automatic exposure control (AEC)?

Using the correct radiation detector is crucial when working with automatic exposure control (AEC) systems, as this choice directly influences the amount of radiation the image receptor receives. AEC systems rely on specific detectors to measure the incoming radiation and determine when to terminate the exposure. If an incorrect detector is selected, it may not accurately sense the radiation, potentially leading to excessive exposure.

The functionality of the AEC depends on the design of the detector and its position relative to the area being imaged. An improper selection can result in the system miscalculating exposure times, which can lead to an overexposed image. Factors such as the type of body part being imaged or the thickness of the tissue being examined can necessitate the use of specific detectors for optimal accuracy. Therefore, ensuring that the right detector is in use is key to achieving appropriate image receptor exposure levels.