Exam 13: Automatic Exposure Control

Which of the following is the most critical aspect of successfully performing an examination using AEC?

Anatomically programmed radiography (APR)is a system in which the radiographer selects: 

When using AEC with digital imaging,errors resulting in overexposure to the IR result in:

With film-screen imaging using AEC,if an AP thoracic spine is imaged using 110 kVp instead of 80 kVp,the density in the area of interest will be __________________ and the image contrast will be ________________________.(Assume all other factors are appropriate. )

The reason to have a back-up time is to:

If the AEC detectors are not completely covered by the part being imaged and are exposed to primary radiation,:

Ion chamber AEC detectors are entrance-type devices because the x-rays must:

With digital imaging using AEC,if an AP thoracic spine is imaged with the central ray passing 3 inches to the right of the spine,the brightness in the area of interest is __________________ and the exposure time is ________________________.(Assume all other factors are appropriate. )

With film-screen imaging using AEC,if an AP thoracic spine is imaged with the density setting changed from 0 to +2,the density in the area of interest will be __________________ and the exposure time will be ________________________.(Assume all other factors are appropriate. )

The AEC system will automatically adjust to changing image receptor types such as switching from a 400-speed film-screen system to a 600-speed film-screen system.

Using a lower mA station during an AEC examination results in:

When the radiographer has the opportunity to set the back-up time,it should be approximately _____________ of the expected exposure time.

The actual amount of exposure used for an image when AEC is being used is the:

Phototimer AEC detectors are usually exit-type devices because:

With digital imaging using AEC,if an AP thoracic spine is imaged with the density setting changed from 0 to +2,the brightness in the area of interest is __________________ and the exposure time is ________________________.(Assume all other factors are appropriate. )

If the back-up time is shorter than the actual exposure time needed for a properly exposed image:

The detector(s)selected for an image should be:

The primary purpose of AEC is to:

AED and phototiming are accurate terms that can be used in place of automatic exposure control.

The original type of AEC detector was the: