RAD 121 EXAM 3 QUESTIONS WITH VERIFIED
ANSWERS
Which of the following are tools that the radiographer can use to limit scatter radiation -
Answers - beam-restricting devices and radiographic grids
A larger x-ray beam field size results in - Answers - increase in scatter produced and
increase in fog
Which of the following beam-restricting devices is best at limiting unsharpness
surrounding the radiographic image - Answers - collimator
The unrestricted primary beam produces a(n) ___ area of exposure - Answers - round
Decreasing collimation results in - Answers - A larger field size
An aperture diaphragm with an attached elongated tube is a(n): - Answers - cylinder
A beam-restricting device that has two or three sets of lead shutters is a(n) - Answers -
collimator
A device consisting of very thin lead strips with radiolucent interspaces intended to
absorb scatter radiation emitted from the patient is a: - Answers - grid
Which of the following is NOT a way to reduce the production of scatter radiation -
Answers - increase the grid ratio
The height of the lead strips relative to the distance between the lead strios is the
measure of - Answers - grid ratio
The number of lead strips per inch in a grid is a measure of - Answers - grid frequency
Due to increased potential grid cutoff, which would be the most challenging grid to use?
- Answers - cross-hatched grid
What is the result of imaging a thicker part or patient - Answers - More Compton
interactions
Which of the following statements is true:
A. A low ratio grid is more effective at removing scatter than a high ratio grid
B. High ratio grids are less effective at removing scatter than low ratio grids
C. As grid ratio increases, the removal of scatter increases
D. A high ratio grid prevents the production of scatter better than a low ratio grid -
Answers - as grid ratio increases, the removal of scatter increases
ANSWERS
Which of the following are tools that the radiographer can use to limit scatter radiation -
Answers - beam-restricting devices and radiographic grids
A larger x-ray beam field size results in - Answers - increase in scatter produced and
increase in fog
Which of the following beam-restricting devices is best at limiting unsharpness
surrounding the radiographic image - Answers - collimator
The unrestricted primary beam produces a(n) ___ area of exposure - Answers - round
Decreasing collimation results in - Answers - A larger field size
An aperture diaphragm with an attached elongated tube is a(n): - Answers - cylinder
A beam-restricting device that has two or three sets of lead shutters is a(n) - Answers -
collimator
A device consisting of very thin lead strips with radiolucent interspaces intended to
absorb scatter radiation emitted from the patient is a: - Answers - grid
Which of the following is NOT a way to reduce the production of scatter radiation -
Answers - increase the grid ratio
The height of the lead strips relative to the distance between the lead strios is the
measure of - Answers - grid ratio
The number of lead strips per inch in a grid is a measure of - Answers - grid frequency
Due to increased potential grid cutoff, which would be the most challenging grid to use?
- Answers - cross-hatched grid
What is the result of imaging a thicker part or patient - Answers - More Compton
interactions
Which of the following statements is true:
A. A low ratio grid is more effective at removing scatter than a high ratio grid
B. High ratio grids are less effective at removing scatter than low ratio grids
C. As grid ratio increases, the removal of scatter increases
D. A high ratio grid prevents the production of scatter better than a low ratio grid -
Answers - as grid ratio increases, the removal of scatter increases
