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 MeV 
A)  100 keV 
B)  1.02 MeV 
C)  10 MeV 
D)  100 MeV

Question 2

The energy of the photoelectron is the least as a result of a photoelectric interaction in:

Accepted Answer

A)  bone 
B)  soft tissue 
C)  fat 
D)  the energy level is the same for all 
A)  bone 
B)  soft tissue 
C)  fat 
D)  the energy level is the same for all

Question 3

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 ejected 
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 ejected

Question 4

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 radiation 
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 radiation

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

Question 6

Classical interactions are also known as:

Accepted Answer

A)  coherent scattering 
B)  Compton scattering 
C)  Thomson scattering 
D)  A and C 
A)  coherent scattering 
B)  Compton scattering 
C)  Thomson scattering 
D)  A and C

Question 7

The Compton electron:

Accepted Answer

A)  typically exits the patient as part of the remnant radiation 
B)  does not have enough energy to produce further interactions 
C)  has enough energy to produce further interactions 
D)  A and B 
A)  typically exits the patient as part of the remnant radiation 
B)  does not have enough energy to produce further interactions 
C)  has enough energy to produce further interactions 
D)  A and B

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 above 
A)  an annihilation event occurs 
B)  the electron and positron are both destroyed 
C)  two x-ray photons are produced 
D)  all of the above

Question 9

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 photon 
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 photon

Question 10

No matter which direction the Compton scatter photon goes,it retains approximately:

Accepted Answer

A)  one fourth of its energy 
B)  one third of its energy 
C)  one half of its energy 
D)  two thirds of its energy 
A)  one fourth of its energy 
B)  one third of its energy 
C)  one half of its energy 
D)  two thirds of its energy

Question 11

Photoelectric interactions are more likely to occur in:

Accepted Answer

A)  air 
B)  soft tissue 
C)  bone 
D)  they occur equally in all types of tissues 
A)  air 
B)  soft tissue 
C)  bone 
D)  they occur equally in all types of tissues

Question 12

Pair production requires an x-ray photon with an energy of at least:

Accepted Answer

A)  0.51 MeV 
B)  1.02 MeV 
C)  1.51 MeV 
D)  2.04 MeV 
A)  0.51 MeV 
B)  1.02 MeV 
C)  1.51 MeV 
D)  2.04 MeV

Question 13

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 14

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

Accepted Answer

A) True 
 B)False

Question 15

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

Question 16

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 17

When it does interact with the image receptor,the Compton scatter photon contributes no useful information because:

Accepted Answer

A)  its energy is too low 
B)  its energy is too high 
C)  it has changed direction 
D)  none of the above 
A)  its energy is too low 
B)  its energy is too high 
C)  it has changed direction 
D)  none of the above

Question 18

The end product(s)of a photoelectric interaction is (are):

Accepted Answer

A)  a high-energy x-ray photon 
B)  a photoelectron 
C)  an ionized atom 
D)  B and C 
A)  a high-energy x-ray photon 
B)  a photoelectron 
C)  an ionized atom 
D)  B and C

Question 19

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

Question 20

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 
A)  the same as an electron 
B)  a positively charged electron 
C)  the same as a proton 
D)  a positively charged neutron

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

The energy of the photoelectron is the least as a result of a photoelectric interaction in:

During a photoelectric interaction,

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

The major source of radiation exposure to technologists is due to:

Classical interactions are also known as:

The Compton electron:

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

The x-ray photon produced during classical scattering:

No matter which direction the Compton scatter photon goes,it retains approximately:

Photoelectric interactions are more likely to occur in:

Pair production requires an x-ray photon with an energy of at least:

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.

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

The greater the absorption of radiation:

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

When it does interact with the image receptor,the Compton scatter photon contributes no useful information because:

The end product(s)of a photoelectric interaction is (are):

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

A positron is:

Introduction to the Imaging Sciences

Structure of the Atom

Electromagnetic and Particulate Radiation

X-Ray Circuit

The X-Ray Tube

X-Ray Production

Image Production

Image Characteristics

Radiographic Exposure Technique

Scatter Control

Image Receptors

Automatic Exposure Control

Image Intensified Fluoroscopy

Additional Equipment

Computed Tomography

Filters

Exam 7: X-Ray Interactions With Matter

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

The energy of the photoelectron is the least as a result of a photoelectric interaction in:

During a photoelectric interaction,

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

The major source of radiation exposure to technologists is due to:

Classical interactions are also known as:

The Compton electron:

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

The x-ray photon produced during classical scattering:

No matter which direction the Compton scatter photon goes,it retains approximately:

Photoelectric interactions are more likely to occur in:

Pair production requires an x-ray photon with an energy of at least:

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.

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

The greater the absorption of radiation:

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

When it does interact with the image receptor,the Compton scatter photon contributes no useful information because:

The end product(s)of a photoelectric interaction is (are):

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

A positron is:

Introduction to the Imaging Sciences

Structure of the Atom

Electromagnetic and Particulate Radiation

X-Ray Circuit

The X-Ray Tube

X-Ray Production

Image Production

Image Characteristics

Radiographic Exposure Technique

Scatter Control

Image Receptors

Automatic Exposure Control

Image Intensified Fluoroscopy

Additional Equipment

Computed Tomography

Filters