Exam 13: Exposure Technique Selection

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. )

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

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.

The amount of electric charge produced in an AEC detector depends on the amount of radiation absorbed by the detector.

In imaging a child,a short exposure time is needed for an examination using AEC.The mA setting should

The original type of AEC detector was the

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

Pre-established guidelines used by the radiographer to select standardized manual or AEC exposure factors for each type of radiographic examination are called

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

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. )

There is typically a configuration of at least _________ AEC detectors in place

The primary purpose of AEC is to

When the x-rays enter the ionization chamber

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

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

Which of the following patient conditions require a change in technical factors?

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 +/- ________

The two types of detectors used in AEC are

Phototimer AEC devices convert the radiation to light energy.

When using AEC,the radiographer is responsible for determining