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Chapter 26 1313
Terms in this set (22)
A severely underexposed image will •
A. be unable to visualize recorded detail.
B.demonstrate adequate image detail but low contrast.
C. darken when placed on an illuminator.
D.demonstrate high radiographic exposure.
• be unable to visualize recorded detail.
Which is used as a guide to maintain the same IR exposure when distance changes?
1. inverse square law
2. exposure maintenance law
3. 15% rule
4. direct square law
2 and 4 only
As you analyze your image, you come to the conclusion that it must have more exposure. As a general rule, you should increase A.decrease SID.
b.mAs by a 0.5 multiplier.
C.mAs by 2x.
D.increase kVp by 15%.
C. mAs by 2x
The 15% rule affects
3. quality of the beam
1,2, and 3
Which factor(s) affects the average energy of photons reaching the IR? 1. kVp 2. distance 3. grid ratio
The brightness of the image on a viewing monitor is 1. a function of the monitor 2. a representation of exposure 3. controlled by window level
1 and 3 only
Which of the following will cause an increase in IR exposure? 1. Increasing generator frequency 2. Decreasing collimation 3. Increasing filtration
• 1 and 2 only
The effect of mAs upon intensity is
B. inverse. .
C.dependent upon kVp.
D. inversely proportional.
Which of the following will occur with a decrease in collimation
1. increase in field size
2. decrease in exposure
3. increase in scatter created
1and 3 only
A change in mAs, as an exposure factor, affects
1. beam intensity
2. the amount of photons reaching the IR
3. average beam energy
1 and 2 only
The greatest factor(s) that is responsible for attenuation of the beam is 1. patient tissue thickness 2. kVp 3. patient tissue density
• 1 and 3 only
Image brightness on an image display monitor can be adjusted by
A. El number.
D window level.
+ window level.
Which statement is FALSE?
A.As mAs decreases, quantity decrçases
B.As mAs increases, output decreases.
C.As mAs increases exposure inoreases
D.As mAs decreaes intensity decroares
As mAs increases , output decreases
When changing your SID from 56" to 72"
decrease your mAs by 50%.
decrease your kVp by 15%.
increase the mAs by a factor of 2.
increase kVp by 15%
Increase the mAs by a factor of 2
Focal spot blooming occurs with
small focal spot.
Because of the "anode heel effect"
1. beam intensity is greater under the cathode end
2. thicker patient anatomy should be placed under the anode end
3. has an impact on IR Exposure if used incorrectly
• 1 and 3 only
Which generator produces the least amount of radiographic exposure?
A.a high-frequency generator
B. three-phase, 6-pulse
In the event of making a single exposure that is critical to the exam success, most experienced technologists should
A. use slightly less mAs than necessary to prevent
B.overexposure the IR slightly
C.increase kVp slightly for increase penetration
D. both b and c
overexpose the IR slightly
The relationship between output and SID is
A. inversely proportional.
B.directiy proportional to the square of the distance
c.inversely proportional to the square of the distance.
inversely proportional to the square of the distance.
Which secondary factor influences the number of photons reaching the IR?
B. focal spot selection
D. Exposure time
The IR exposure of the radiographic image is
1. the response of photons striking the IR.
2. the brightness of the image.
3. affected by the quality of the beam
1 and 3 only
22-31 math questions
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