FAUBER’S RADIOGRAPHIC IMAGING &
EXPOSURE (7TH EDITION)
1. Why does the air-gap technique work?:
ANS>> the scatter photons are more likely to miss the image receptor
2. The number of lead strips per inch in a grid is a measure of::
ANS>> grid frequency
3. An optimal AP abdomen radiograph can be produced using 40
mAs, 75 kVp, and a 12:1 grid. How much mAs would be needed if
the only grid available is a 6:1 ratio grid?:
ANS>> 24 mAs
4. If an excellent knee radiograph is produced using 10 mAs and
an 8:1 ratio grid, how much mAs will be needed if no grid is
available?:
ANS>> 2.5 mAs
5. A beam-restricting device that has two or three sets of lead shutters
is a(n):-
:
ANS>> collimator
6. Increasing collimation results in reduced patient exposure,
increased field size, and reduced scatter production.:
ANS>> false
7. What is the result of imaging a thicker part or patient?:
ANS>> more Compton interactions
8. Grid ratios range from::
ANS>> 4:1 to 16:1
1/
10
, FAUBER’S RADIOGRAPHIC IMAGING &
EXPOSURE (7TH EDITION)
9. Which of the following is not a way to reduce the production
of scatter radiation?:
ANS>> increase grid ratio
10. Which of the following beam-restricting devices is least
effective at limiting unsharpness surrounding the radiographic image?:
ANS>> aperture diaphragm
11. Which beam restriction device can be cut to the size needed?:
ANS>> an aperture di- aphragm
12. What is found between the lead strips in a grid?:
ANS>> radiolucent material
13. Which of the following influences the amount of scatter
radiation striking the image receptor but not the production of scatter
radiation?:
ANS>> increase the grid ratio
14. A device consisting of very thin lead strips with
radiolucent interspaces intended to absorb scatter radiation
emitted from the patient is a::
ANS>> grid
15. Digital IRs are less sensitive to scatter radiation than are film-
screen IRs.:
ANS>> false
16. The unrestricted
primary beam produces a(n) area of exposure.:
2/
10
EXPOSURE (7TH EDITION)
1. Why does the air-gap technique work?:
ANS>> the scatter photons are more likely to miss the image receptor
2. The number of lead strips per inch in a grid is a measure of::
ANS>> grid frequency
3. An optimal AP abdomen radiograph can be produced using 40
mAs, 75 kVp, and a 12:1 grid. How much mAs would be needed if
the only grid available is a 6:1 ratio grid?:
ANS>> 24 mAs
4. If an excellent knee radiograph is produced using 10 mAs and
an 8:1 ratio grid, how much mAs will be needed if no grid is
available?:
ANS>> 2.5 mAs
5. A beam-restricting device that has two or three sets of lead shutters
is a(n):-
:
ANS>> collimator
6. Increasing collimation results in reduced patient exposure,
increased field size, and reduced scatter production.:
ANS>> false
7. What is the result of imaging a thicker part or patient?:
ANS>> more Compton interactions
8. Grid ratios range from::
ANS>> 4:1 to 16:1
1/
10
, FAUBER’S RADIOGRAPHIC IMAGING &
EXPOSURE (7TH EDITION)
9. Which of the following is not a way to reduce the production
of scatter radiation?:
ANS>> increase grid ratio
10. Which of the following beam-restricting devices is least
effective at limiting unsharpness surrounding the radiographic image?:
ANS>> aperture diaphragm
11. Which beam restriction device can be cut to the size needed?:
ANS>> an aperture di- aphragm
12. What is found between the lead strips in a grid?:
ANS>> radiolucent material
13. Which of the following influences the amount of scatter
radiation striking the image receptor but not the production of scatter
radiation?:
ANS>> increase the grid ratio
14. A device consisting of very thin lead strips with
radiolucent interspaces intended to absorb scatter radiation
emitted from the patient is a::
ANS>> grid
15. Digital IRs are less sensitive to scatter radiation than are film-
screen IRs.:
ANS>> false
16. The unrestricted
primary beam produces a(n) area of exposure.:
2/
10
