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Worksheets1313 Unit 5 Quizizz
Total questions: 11
Worksheet time: 6mins
What terminates the exposure when using AEC
Sufficient x-rays detected by the PMT
Predetermined current measured by the ion chamber
Predetermined mAs generated by the photodiode
Suficient x-rays detected by the anode
In order to become familiar with manual technical factors (i.e., setting mAs and kVp and not using AEC), it is very helpful to pay attention to the:
exposure time
heat units
mAs readout
patient's breathing
When determining if exposure technique should be adjusted for a small or large patient, it is best to use:
AEC
Calipers
Visual inspection
Positioning grids
Where does a radiographer find the established guidelines for selecting exposure factors for a radiographic examination?
Exposure Technique Chart
Generator control panel
AEC
Examination requisition
Exposure time will ______ when using AEC when patient thickness decreases.
increase
decrease
remain the same
double
With DR imaging, it is not necessary to precisely align the part, CR, and IR, when using AEC.
True
False
When using a fixed kVp-variable mAs technique chart, if part thickness increases by 5 cm, what needs to happen to the mAs?
It should be halved
It should be doubled
It should be quartered
It should be tripled
A variable kVp-fixed mAs chart may be most effective with:
geriatric patients
trauma patients
pediatric patients
patients imaged with mobile equipment
What happens when an outside detector is selected for an AP thoracic spine?
The spine will have insufficient contrast
The spine will be underexposed
The spine will be overexposed
The spine will be saturated
A manual technique exposure longer than the system's minimum response time will result in a/an _____________ image.
Overexposed
Underexposed
Sufficiently Exposed
The 15% rule for kVp states:
A 15% change in kVp requires a change in mAs by a factor of 2
A 15% increase in kVp doubles exposure to the IR
A 15% increase in kVp increases contrast by a factor of 2
A 15% decrease in kVp increases patient exosure by a factor of 2
