Question 1

Decreasing the kVp will increase _____.

Accepted Answer

A)   patient dose
B)   image noise
C)   Compton scatter
D)   optical densityE) B) and D)
F) B) and C)

Question 2

The x-ray interaction that contributes to the clear parts of the image is _____.

Accepted Answer

A)   coherent scatter
B)   Compton interaction
C)   photoelectric interaction
D)   pair productionE) None of the above
F) A) and B) C

Question 3

The use of a compression device will increase _____.

Accepted Answer

A)   film fog
B)   patient dose
C)   contrast
D)   scatterE) B) and C)
F) A) and D)

Question 4

Beam restriction with a(n) _____ is only accurate at a fixed SID.

Accepted Answer

A)   aperture diaphragm
B)   cone
C)   collimator
D)   PBL deviceE) A) and B)
F) A) and C)

Question 5

Scatter radiation increases as _____ increases.

Accepted Answer

A)   photoelectric absorption
B)   field size
C)   filtration
D)   contrastE) C) and D)
F) A) and B)

Question 6

How can you improve image contrast with a heavy patient without increasing patient dose?

Accepted Answer

A)   Lower kVp and raise mAs.
B)   Use tight collimation.
C)   Raise kVp and lower mAs.
D)   Do both A and B.E) A) and B)
F) A) and C)

Question 7

Which kVp selection would result in the most scattered x-rays in the image-forming beam?

Accepted Answer

A)   90 kVp
B)   75 kVp
C)   60 kVp
D)   50 kVpE) B) and C)
F) B) and D)

Question 8

Photoelectric interactions increase when _____ is decreased.

Accepted Answer

A)   mAs
B)   patient thickness
C)   filtration
D)   kVpE) A) and B)
F) C) and D)

Question 9

Approximately _____% of the x-ray beam incident on the patient is transmitted through the patient without interaction to become part of the image-forming beam.

Accepted Answer

A)   90-99
B)   80-89
C)   20-29
D)   0-9E) A) and D)
F) None of the above

Question 10

The three primary factors influencing the intensity of scatter in the image-forming beam are _____.

Accepted Answer

A)   mAs, kVp, and collimation
B)   mAs, filtration, and grids
C)   kVp, field size, and patient thickness
D)   filtration, patient thickness, and mAsE) B) and C)
F) A) and B) C

Question 11

Image-forming x-rays include those which have been _____.

Accepted Answer

A)   transmitted without interaction
B)   scattered through Compton interaction
C)   absorbed through photoelectric interaction
D)   both A and BE) All of the above
F) C) and D)

Question 12

A fixed aperture diaphragm should leave a _____ cm unexposed border on the film.

Accepted Answer

A)   0.1
B)   0.5
C)   1
D)   2E) A) and D)
F) None of the above C

Question 13

The x-rays that are transmitted through the patient without interaction contribute to _____.

Accepted Answer

A)   useful information
B)   film fog
C)   image noise
D)   all of the aboveE) C) and D)
F) All of the above

Question 14

The most commonly used beam restricting device is the _____.

Accepted Answer

A)   extension cone
B)   variable collimator
C)   aperture diaphragm
D)   compression deviceE) None of the above
F) B) and D)

Question 15

Federal regulations passed in _____ required that positive beam limiting devices be on all manufactured x-ray collimators.

Accepted Answer

A)   1954
B)   1974
C)   1994
D)   2000E) B) and D)
F) All of the above

Question 16

Lowering kVp _____ patient dose and _____ image contrast.

Accepted Answer

A)   lowers, decreases
B)   increases, decreases
C)   lowers, increases
D)   increases, increasesE) A) and B)
F) A) and C)

Question 17

Compton scatter contributes to _____.

Accepted Answer

A)   useful information
B)   image noise
C)   image contrast
D)   all of the aboveE) B) and D)
F) All of the above

Question 18

The use of _____ improves contrast and reduces patient dose.

Accepted Answer

A)   collimation
B)   high kVp
C)   low kVp
D)   less filtrationE) All of the above
F) B) and D)

Question 19

Contrast resolution is improved by _____.

Accepted Answer

A)   tight collimation
B)   lowering kVp
C)   patient compression
D)   all of the aboveE) C) and D)
F) A) and D)

Question 20

The positive beam limiting device (PBL) assures that the x-ray beam is collimated to _____.

Accepted Answer

A)   the exact part size
B)   1 cm inside image receptor size
C)   the image receptor size
D)   1 cm outside image receptor sizeE) A) and B)
F) B) and C)

Exam 11: Control of Scatter Radiation

Decreasing the kVp will increase _____.

Correct AnswerverifiedShow Answer

The x-ray interaction that contributes to the clear parts of the image is _____.

Correct AnswerverifiedC

The use of a compression device will increase _____.

Correct AnswerverifiedShow Answer

Beam restriction with a(n) _____ is only accurate at a fixed SID.

Correct AnswerverifiedShow Answer

Scatter radiation increases as _____ increases.

Correct AnswerverifiedShow Answer

How can you improve image contrast with a heavy patient without increasing patient dose?

Correct AnswerverifiedShow Answer

Which kVp selection would result in the most scattered x-rays in the image-forming beam?

Correct AnswerverifiedShow Answer

Photoelectric interactions increase when _____ is decreased.

Correct AnswerverifiedShow Answer

Approximately _____% of the x-ray beam incident on the patient is transmitted through the patient without interaction to become part of the image-forming beam.

Correct AnswerverifiedShow Answer

The three primary factors influencing the intensity of scatter in the image-forming beam are _____.

Correct AnswerverifiedC

Image-forming x-rays include those which have been _____.

Correct AnswerverifiedShow Answer

A fixed aperture diaphragm should leave a _____ cm unexposed border on the film.

Correct AnswerverifiedC

The x-rays that are transmitted through the patient without interaction contribute to _____.

Correct AnswerverifiedShow Answer

The most commonly used beam restricting device is the _____.

Correct AnswerverifiedShow Answer

Federal regulations passed in _____ required that positive beam limiting devices be on all manufactured x-ray collimators.

Correct AnswerverifiedShow Answer

Lowering kVp _____ patient dose and _____ image contrast.

Correct AnswerverifiedShow Answer

Compton scatter contributes to _____.

Correct AnswerverifiedShow Answer

The use of _____ improves contrast and reduces patient dose.

Correct AnswerverifiedShow Answer

Contrast resolution is improved by _____.

Correct AnswerverifiedShow Answer

The positive beam limiting device (PBL) assures that the x-ray beam is collimated to _____.

Correct AnswerverifiedShow Answer

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C

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C

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C

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Lowering kVp _ patient dose and _ image contrast.

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