Question

which of the following exposure factors is controlled by the automatic exposure control (aec) system?
kilovoltage peak (kvp)
milliampere (ma)
source - to - image distance (sid)
time

Explanation:

The automatic exposure control (AEC) system controls the time of exposure. It measures the radiation reaching the image - receptor and terminates the exposure when the appropriate amount of radiation has been detected. Kilovoltage peak (kVp) is set based on the type of tissue and examination. Milliamperage (mA) is also a pre - set factor. Source - to - image distance (SID) is a geometric factor set by the operator and not controlled by AEC.

Answer:

Time