Final answer:
If the backup time stops a breast exposure, the technologist can repeat the radiograph using a different AEC setting to reduce radiation exposure.
Step-by-step explanation:
When it comes to reducing radiation exposure during x-ray imaging, one method is to limit the time of exposure. If the backup time stops a breast exposure, the technologist can repeat the radiograph using a different AEC setting. Automatic Exposure Control (AEC) is a feature on x-ray machines that adjusts the exposure factors based on the thickness and density of the body part being imaged. By using a different AEC setting, the technologist can ensure that the appropriate amount of radiation is being used for the specific patient and reduce unnecessary exposure.