C3: Review Questions

Question 1

Exit, or image-formation, radiation is composed of which of the following?

Answer 1

noninteracting and small angle scattered photons

Question 2

Which of the following contributes significantly to the exposure of the radiographer?

Answer 2

Compton scattered photons

Question 3

Which of the following defines attenuation?

Answer 3

absorption and scatter

Question 4

In the radiographic kilovoltage range, which of the following structures undergoes the most photoelectric absorption?

Answer 4

compact bone

Question 5

In which of the following x-ray interactions with matter is the energy of the incident photon partially absorbed?

Answer 5

Compton

Question 6

When a high atomic number solution is either swallowed or injected into human tissue or a structure to visualize it during an imaging procedure, which of the following occurs?

Answer 6

photoelectric interaction becomes significantly enhanced, leading to an increase in the absorbed dose in the body tissues or structures that contain the contrast medium

Question 7

Which of the following characteristics primarily differentiates the probability of occurrence of the various interactions of x-radiation with human tissue?

Answer 7

energy of the incoming photon

Question 8

Which of the following influences attenuation?
1. effective atomic number of the absorber
2. mass density
3. thickness of the absorber

Answer 8

1, 2, and 3

Question 9

A decrease in contrast of the image by adding an unwanted additional exposure (radiographic fog) results from which of the following interactions between x-radiation and mater?
1. Compton scattering
2. pair production
3. photoelectric absorption

Answer 9

1 only

Question 10

The interactions of x-ray photons with any atoms of biologic matter are:

Answer 10

random, so the effects of such interactions cannot be predicted with certainty