Question 1

For photodisintegration to occur,the incident photon must have an energy level of at least

Accepted Answer

A)  100 keV
B)  1.02 MeV
C)  10 MeV
D)  100 MeVE) A) and C)
F) A) and B)

Question 2

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) None of the above

Question 3

The fog seen on the radiographic image is the result of

Accepted Answer

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

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

The greater the angle of deflection of a Compton scatter photon:

Accepted Answer

A)  the more likely it will interact with the image receptor
B)  the lower the energy of the photon
C)  the higher the energy of the photon
D)  the more likely it will become part of the remnant radiationE) A) and B)
F) C) and D) B

Question 6

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) B) and C)
F) All of the above

Question 7

If a middle-shell electron is removed during a Compton interaction

Accepted Answer

A)  secondary photons are produced
B)  a secondary electron is ejected
C)  a Compton scatter photon is produced
D)  all of the aboveE) B) and C)
F) A) and D)

Question 8

After ejection from the atom's nucleus,when the positron interacts with an electron

Accepted Answer

A)  an annihilation event occurs
B)  the electron and positron are both destroyed
C)  two x-ray photons are produced
D)  all of the aboveE) None of the above
F) All of the above

Question 9

Reducing the amount of Compton scattering

Accepted Answer

A)  is impossible
B)  is extremely difficult to accomplish
C)  is very important in producing quality images
D)  all of the aboveE) A) and C)
F) B) and C)

Question 10

Most classical scatter photons

Accepted Answer

A)  are the result of the removal of an orbital electron
B)  are absorbed in the body
C)  are transmitted through the body
D)  become remnant radiationE) B) and C)
F) A) and B)

Question 11

The higher the atomic number of an atom,the greater the probability of a photoelectric interaction.

Accepted Answer

A) True 
 B)False  True

Question 12

During a photoelectric interaction,

Accepted Answer

A)  an inner-shell electron is ejected
B)  an outer-shell electron is ejected
C)  no electrons are ejected
D)  electrons for all levels are ejectedE) B) and C)
F) A) and B)

Question 13

The greater the absorption of radiation

Accepted Answer

A)  the greater the differential absorption
B)  the better the image quality
C)  the greater the patient dose
D)  all of the aboveE) A) and B)
F) A) and D)

Question 14

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 the aboveE) A) and C)
F) A) and B)

Question 15

Classical interactions are also known as

Accepted Answer

A)  coherent scattering
B)  Compton scattering
C)  Thomson scattering
D)  A and C
E)  B and CF) A) and B)
G) C) and E)

Question 16

The x-ray photon produced during classical scattering

Accepted Answer

A)  is lower energy than the incident photon
B)  is higher energy than the incident photon
C)  travels in a different direction than the incoming photon
D)  travels in the same direction than the incoming photonE) A) and D)
F) None of the above

Question 17

The effect of classical scatter interactions on image quality

Accepted Answer

A)  is significant
B)  is minimal
C)  is that quality is improved
D)  B and CE) A) and B)
F) B) and C)

Question 18

Following absorption of the incident photon in the atom's nucleus,a photodisintegration interaction may result in

Accepted Answer

A)  positrons being ejected from the nucleus
B)  neutrons being ejected from the nucleus
C)  protons being ejected from the nucleus
D)  B and CE) None of the above
F) B) and C)

Question 19

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) All of the above
F) B) and C)

Question 20

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) A) and D)
F) A) and C)

Exam 7: X-Ray Interactions With Matter

For photodisintegration to occur,the incident photon must have an energy level of at least

Correct AnswerverifiedShow Answer

A positron is

Correct AnswerverifiedShow Answer

The fog seen on the radiographic image is the result of

Correct AnswerverifiedD

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

Correct AnswerverifiedShow Answer

The greater the angle of deflection of a Compton scatter photon:

Correct AnswerverifiedB

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

Correct AnswerverifiedShow Answer

If a middle-shell electron is removed during a Compton interaction

Correct AnswerverifiedShow Answer

After ejection from the atom's nucleus,when the positron interacts with an electron

Correct AnswerverifiedShow Answer

Reducing the amount of Compton scattering

Correct AnswerverifiedShow Answer

Most classical scatter photons

Correct AnswerverifiedShow Answer

The higher the atomic number of an atom,the greater the probability of a photoelectric interaction.

Correct AnswerverifiedTrue

During a photoelectric interaction,

Correct AnswerverifiedShow Answer

The greater the absorption of radiation

Correct AnswerverifiedShow Answer

Coherent scattering involves

Correct AnswerverifiedShow Answer

Classical interactions are also known as

Correct AnswerverifiedShow Answer

The x-ray photon produced during classical scattering

Correct AnswerverifiedShow Answer

The effect of classical scatter interactions on image quality

Correct AnswerverifiedShow Answer

Following absorption of the incident photon in the atom's nucleus,a photodisintegration interaction may result in

Correct AnswerverifiedShow Answer

Protective apparel is often made of lead because it

Correct AnswerverifiedShow Answer

The major source of radiation exposure to technologists is due to

Correct AnswerverifiedShow Answer

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D

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B

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True

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