Question 1

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

Accepted Answer

A) True 
 B)False

Question 2

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

Accepted Answer

A) True 
 B)False

Question 3

Secondary x-ray photons are the result of

Accepted Answer

A)  Compton interactions 
B)  Thompson scattering 
C)  photoelectric interactions 
D)  Compton interactions and photoelectric interactions

Question 4

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 these

Question 5

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 6

Compton scattering results in

Accepted Answer

A)  a Compton electron 
B)  a secondary electron 
C)  a Compton scatter photon 
D)  all of these

Question 7

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 these

Question 8

The major source of radiation exposure to technologists is due to

Accepted Answer

A)  coherent scattering 
B)  classical scattering 
C)  photoelectric interactions 
D)  Compton interactions

Question 9

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 number

Question 10

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

Accepted Answer

A) True 
 B)False

Question 11

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

Accepted Answer

A) True 
 B)False

Question 12

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

Accepted Answer

A) True 
 B)False

Question 13

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 photons

Question 14

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)  scattered

Question 15

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 16

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 these

Question 17

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 done

Question 18

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 neutron

Question 19

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 these

Question 20

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 these

Exam 7: X-Ray Interactions With Matter

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

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

Secondary x-ray photons are the result of

After a photoelectric interaction, the incident photon

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

Compton scattering results in

Coherent scattering involves

The major source of radiation exposure to technologists is due to

Protective apparel is often made of lead because it

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

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

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

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

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

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.

Secondary photons produced during a Compton interaction

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

A positron is

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

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