Identify the AEC error: a large lung field overlies the center chamber for a PA chest.
QUESTION
What does an AEC ionization chamber measure to control exposure termination?
QUESTION
What should the backup timer be set to when using AEC to protect the patient?
Tap to flip before you grade
ANSWER
A time slightly longer than expected, below the maximum safe mAs/time. This setting allows normal AEC function while providing a safety limit to prevent excessive radiation if termination fails.