RADT 1075 Final With Solutions 100%
Correct
Which factor influences the number of photons reaching the IF? mAs
The effect of mAs upon IR exposure is directly proportional
The relationship between exposure and SID is inversely proportional to the square of the
distance
A change in kVp, as an...
Which factor influences the number of photons reaching the IF? mAs
The effect of mAs upon IR exposure is directly proportional
The relationship between exposure and SID is inversely proportional to the square of the
distance
A change in kVp, as an exposure factor, affects average beam energy, the amount of
scatter production, and beam intensity
The density maintenance/direct maintenance formula mathematically resembles the
inverse square law
If you decrease kVp, what happens to density/receptor exposure? decreases
As you analyze your image, you come to the conclusion that it must have more exposure. As a
general rule, you should increase mAs by 2x
, RADT 1075 Final With Solutions 100%
Correct
Which of the following has NO impact on receptor exposure? focal spot size
Which of the following has NO impact on radiation exposure to the patient? Focal spot
size
Which statement is FALSE? As mAs decreases, exposure increases.
The air gap technique can be used as an alternative to: Grids
In the event of making a single exposure that is critical to the exam success, most experienced
technologists will overexpose the IR slightly, provide enough exposure to permit viewing
with a bright light or adequate histogram.
The grid conversion factor for a 12:1 grid is: 5
Which rule is used as a guide to maintain the same density when kVp changes? 15% rule
, RADT 1075 Final With Solutions 100%
Correct
A severely underexposed image will be unable to visualize recorded detail
If a particular radiographic exposure requires 50 mAs and the 400 mA station is selected, what
exposure time is required? 1/8 second
Because of the "heel effect", x-ray beam intensity is greater under the cathode side of the
tube
Image brightness on an image display monitor is controlled by window level
If you change the focal spot from small to large, what happens to density/receptor exposure?
nothing happens
A chest radiograph is produces with sufficient optical receptor exposure using 10 mAs at 72
inches. If the same radiograph is performed at 44 inches SID, what new mAs should be used to
produce the radiograph with the same receptor exposure? 3.7 mAs
The anode heel effect is more pronounced with a 10 degree target angle
, RADT 1075 Final With Solutions 100%
Correct
The optical density range visible to the human eye is 0.25 to 2.50
The 15% rule changes contrast and density
Most radiographers will use more exposure than required for a procedure. This does what to
patient exposure? increases patient exposure
The brightness of the image on a viewing monitor is a function of the monitor
The principal controlling factor of radiographic image density is mAs
increasing kVp from 85 to 98 kVp 15% rule
direct relationship between mAs and distance density maintenance formula
require an increase in mAs as ratio increases radiographic grids
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