Question 1

After a photoelectric interaction, the incident photon

Accepted Answer

A)   loses some of its energy and changes direction
B)   loses most of its energy and changes direction
C)   loses all of its energy and no longer exists
D)   none of theseE) A) and B)
F) All of the above

Question 2

Secondary x-ray photons are the result of

Accepted Answer

A)   Compton interactions
B)   Thompson scattering
C)   photoelectric interactions
D)   Compton interactions and photoelectric interactionsE) A) and D)
F) None of the above

Question 3

The probability of a photoelectric interaction depends on the atomic number of the atom.

Accepted Answer

A) True 
 B)False

Question 4

Radiation interacting with air is more likely to be _____________, resulting in that area of the image being darker.

Accepted Answer

A)   absorbed
B)   transmitted
C)   attenuated
D)   scatteredE) None of the above
F) B) and C)

Question 5

The major source of radiation exposure to technologists is due to

Accepted Answer

A)   coherent scattering
B)   classical scattering
C)   photoelectric interactions
D)   Compton interactionsE) C) and D)
F) A) and B)

Question 6

Protective apparel is often made of lead because it

Accepted Answer

A)   is very heavy
B)   can be made very thick
C)   is inexpensive
D)   has a high atomic numberE) C) and D)
F) All of the above

Question 7

All Compton scatter photons travel in the direction of the image receptor.

Accepted Answer

A) True 
 B)False

Question 8

A positron is

Accepted Answer

A)   the same as an electron
B)   a positively charged electron
C)   the same as a proton
D)   a positively charged neutronE) B) and C)
F) B) and D)

Question 9

The photoelectric interaction and Compton interaction can both result in a characteristic cascade, producing characteristic radiation.

Accepted Answer

A) True 
 B)False

Question 10

The probability of Compton scattering depends on the atomic number of the atom.

Accepted Answer

A) True 
 B)False

Question 11

The more the energy of the incident x-ray photon exceeds the binding energy of the inner-shell electron, the greater the probability of a photoelectric interaction.

Accepted Answer

A) True 
 B)False

Question 12

Coherent scattering involves

Accepted Answer

A)   an x-ray photon with high energy
B)   an x-ray photon with low energy
C)   ionization
D)   all of theseE) B) and D)
F) B) and C)

Question 13

Secondary photons produced during a Compton interaction

Accepted Answer

A)   are typically high energy
B)   usually exit the patient and interact with the image receptor
C)   contribute to patient dose
D)   none of theseE) A) and B)
F) A) and C)

Question 14

The x-ray photons that are produced as a result of a characteristic cascade during a Compton interaction

Accepted Answer

A)   are characteristic x-ray photons
B)   are brems x-ray photons
C)   are Compton x-ray photons
D)   are "braking" x-ray photonsE) A) and C)
F) C) and D)

Question 15

Potential biological damage can occur as a result of a Compton interaction because of the ionization of atoms.

Accepted Answer

A) True 
 B)False

Question 16

To produce a radiographic image that represents anatomy, there must be

Accepted Answer

A)   photoelectric interactions
B)   transmitted photons
C)   differential absorption
D)   all of theseE) C) and D)
F) B) and D)

Question 17

The probability of Compton scattering depends on the energy level of the incident x-ray photon.

Accepted Answer

A) True 
 B)False

Question 18

Radiation interacting with bone is more likely to be absorbed, resulting in that area of the image being

Accepted Answer

A)   a light shade of gray
B)   a dark shade of gray
C)   black
D)   all of theseE) A) and C)
F) B) and C)

Question 19

The primary source of radiation exposure to the radiographer who is in the room during an exposure is

Accepted Answer

A)   from scatter from the table
B)   from scatter from the patient
C)   from scatter from the image receptor
D)   hard to determine; it depends on the procedure being doneE) B) and C)
F) A) and B)

Question 20

Compton scattering results in

Accepted Answer

A)   a Compton electron
B)   a secondary electron
C)   a Compton scatter photon
D)   all of theseE) A) and D)
F) All of the above

Exam 7: X-Ray Interactions With Matter

Secondary x-ray photons are the result of

Correct AnswerverifiedShow Answer

Coherent scattering involves

Correct AnswerverifiedShow Answer

The major source of radiation exposure to technologists is due to

Correct AnswerverifiedShow Answer

Radiation interacting with air is more likely to be _____________, resulting in that area of the image being darker.

Correct AnswerverifiedShow Answer

Radiation interacting with bone is more likely to be absorbed, resulting in that area of the image being

Correct AnswerverifiedShow Answer

The more the energy of the incident x-ray photon exceeds the binding energy of the inner-shell electron, the greater the probability of a photoelectric interaction.

Correct AnswerverifiedShow Answer

After a photoelectric interaction, the incident photon

Correct AnswerverifiedShow Answer

A positron is

Correct AnswerverifiedShow Answer

Potential biological damage can occur as a result of a Compton interaction because of the ionization of atoms.

Correct AnswerverifiedShow Answer

The primary source of radiation exposure to the radiographer who is in the room during an exposure is

Correct AnswerverifiedShow Answer

The x-ray photons that are produced as a result of a characteristic cascade during a Compton interaction

Correct AnswerverifiedShow Answer

To produce a radiographic image that represents anatomy, there must be

Correct AnswerverifiedShow Answer

All Compton scatter photons travel in the direction of the image receptor.

Correct AnswerverifiedShow Answer

The probability of Compton scattering depends on the energy level of the incident x-ray photon.

Correct AnswerverifiedShow Answer

The probability of a photoelectric interaction depends on the atomic number of the atom.

Correct AnswerverifiedShow Answer

Compton scattering results in

Correct AnswerverifiedShow Answer

Protective apparel is often made of lead because it

Correct AnswerverifiedShow Answer

The probability of Compton scattering depends on the atomic number of the atom.

Correct AnswerverifiedShow Answer

The photoelectric interaction and Compton interaction can both result in a characteristic cascade, producing characteristic radiation.

Correct AnswerverifiedShow Answer

Secondary photons produced during a Compton interaction

Correct AnswerverifiedShow Answer

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