171 MRO Quizzes ACTUAL EXAM/ MOSTLY TESTED QUESTIONS
AND CORRECT DETAILED ANSWERS| 100% CORRECT
SOLUTIONS/GRADE A+
T/F
Radiographic density is the degree of blackening of an area of film.
Ans: T
By definition, radiographic density is the degree of blackening of an area of film.
Which of the following primarily determines the variation in density on the finished radiograph?
- Speed of photons
- Absorption characteristics of the body
- Image receptor
- Type of radiographic unit
Ans: Absorption characteristics of the body
,Density on a radiographic image is actually the result of absorption characteristics of the body.
A histogram is a:
Ans: Processing algorithm to produce an image
Dose creep is a problem with which system?
Ans: Digital
The useful range of density in film/screen imaging is represented by which part of the curve?
Ans: Body (straight line portion)
Body: human eye can see
toe & shoulder: transition points
T/F
mAs controls quantity.
Ans: T
, mAs controls the number of electrons boiled off of the filament and available for interaction at the
anode to produce x-rays, it is said to control quantity.
Which set of factors will produce the greatest density?
- 50 kVp at 20 mAs
- 60 kVp at 20 mAs
- 70 kVp at 20 mAs
- 80 kVp at 20 mAs
Ans: 80 kVp at 20 mAs
All other factors remaining constant, an increase in kVp results in an increase in density. Therefore, the
highest kVp in the list of choices will produce the greatest density.
What percentage of change in kVp is roughly equal to doubling the mAs?
Ans: 15%
What happens to density as SID increases?
Ans: Decreases
If no adjustments are made, increases in SID cause the same number of photons to be spread over a
larger area, thereby decreasing density
AND CORRECT DETAILED ANSWERS| 100% CORRECT
SOLUTIONS/GRADE A+
T/F
Radiographic density is the degree of blackening of an area of film.
Ans: T
By definition, radiographic density is the degree of blackening of an area of film.
Which of the following primarily determines the variation in density on the finished radiograph?
- Speed of photons
- Absorption characteristics of the body
- Image receptor
- Type of radiographic unit
Ans: Absorption characteristics of the body
,Density on a radiographic image is actually the result of absorption characteristics of the body.
A histogram is a:
Ans: Processing algorithm to produce an image
Dose creep is a problem with which system?
Ans: Digital
The useful range of density in film/screen imaging is represented by which part of the curve?
Ans: Body (straight line portion)
Body: human eye can see
toe & shoulder: transition points
T/F
mAs controls quantity.
Ans: T
, mAs controls the number of electrons boiled off of the filament and available for interaction at the
anode to produce x-rays, it is said to control quantity.
Which set of factors will produce the greatest density?
- 50 kVp at 20 mAs
- 60 kVp at 20 mAs
- 70 kVp at 20 mAs
- 80 kVp at 20 mAs
Ans: 80 kVp at 20 mAs
All other factors remaining constant, an increase in kVp results in an increase in density. Therefore, the
highest kVp in the list of choices will produce the greatest density.
What percentage of change in kVp is roughly equal to doubling the mAs?
Ans: 15%
What happens to density as SID increases?
Ans: Decreases
If no adjustments are made, increases in SID cause the same number of photons to be spread over a
larger area, thereby decreasing density
