Exam 13: Automatic Exposure Control

If the patient for an AP thoracic spine image is centered so that the spine is not over the top of the detector:

The AEC minimum response time may pose a problem when:

The two types of detectors used in AEC are:

All APR settings use AEC

If an AEC has three detectors,only one of the three can be selected for an exposure.

When your patient for an AP abdomen is very heavy,using AEC results in:

If the radiographer is doing an upright chest using AEC but the table bucky is selected:

With digital imaging using AEC,if an AP thoracic spine is imaged using an outside instead of center detector,the brightness in the area of interest will be __________________ and the quantum noise will be ________________________.(Assume all other factors are appropriate. )

An ionization chamber is a hollow device that contains:

When using AEC,the exit radiation is converted into an electrical signal.

The testing to see that the AEC device terminates the exposure at the same level of exposure,regardless of variations in other factors such as kVp or patient thickness is checking for __________________ and optical densities should be within +/- ________.

Using the plus or minus density controls should be done frequently to produce optimal images with AEC.

The predetermined level of radiation exposure needed to terminate the exposure when using AEC is set by:

If the back-up time is set by the equipment,the exposure time should end when the mAs reaches:

The maximum length of time that an exposure lasts when using AEC is the:

When using AEC,the radiographer is responsible for determining:

Today's AEC system is most likely use a(n):

Once the electric charge from an AEC detector reaches a preset point:

The shortest exposure time that a radiographic tube with AEC can have is the:

The device that converts the light energy to an electrical signal is the: