Automatic Exposure Control (AEC) Quiz

What is AEC similar to, according to the instructor's analogy?

• Using a blender

• Using a microwave

• Driving a manual car

• Driving an automatic car

What does the radiographer select when using AEC?

• KV and Ma

• Seconds and time

• Photo cells and backup timer

• Exposure duration

What is the function of the photo cells in AEC?

• To select KV and Ma

• To position the patient

• To set the backup timer

• To monitor radiation exposure

What happens if the backup timer is not set correctly?

• The KV and Ma will not be selected

• The photo cells will not activate

• The exposure will terminate early

• The patient may be overexposed

What should be selected for a PA chest x-ray to avoid overexposure?

• The two outer cells

• The center cell

• The backup timer

• The KV and Ma

What analogy is used to explain the difference between lung tissue and bone in x-ray imaging?

• Lungs as a sponge and bone as a strainer

• Lungs as a strainer and bone as a sponge

• Lungs as a cup and bone as a tray

• Lungs as a sensor and bone as a photo cell

What is the purpose of the backup timer in AEC?

• To monitor the amount of radiation

• To position the patient correctly

• To select the correct photo cells

• To protect the patient from overexposure

What can result from improper positioning of the patient in AEC?

• Underexposed or overexposed images

• Correct exposure every time

• Automatic adjustment of KV and Ma

• No effect on the image

What should be done for larger patients to ensure proper exposure?

• Select different photo cells

• Use manual exposure control

• Select different KV and Ma

• Adjust the backup timer

What is the main benefit of using AEC in radiology?

• Increased radiation exposure

• Manual control of exposure time

• Automatic termination of exposure

• Reduced need for patient positioning