Question 1

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

Question 2

The energy of the photoelectron is equal to

Accepted Answer

A)  the binding energy of the orbital electron minus the energy of the incident photon 
B)  the energy of the incident photon minus the binding energy of the orbital electron 
C)  the binding energy of the orbital electron plus the energy of the incident photon 
D)  none of these 
A)  the binding energy of the orbital electron minus the energy of the incident photon 
B)  the energy of the incident photon minus the binding energy of the orbital electron 
C)  the binding energy of the orbital electron plus the energy of the incident photon 
D)  none of these B

Question 3

Dense material, like bone, is considered:

Accepted Answer

A)  radiopaque 
B)  easy to penetrate 
C)  radiolucent 
D)  less likely to absorb radiation 
A)  radiopaque 
B)  easy to penetrate 
C)  radiolucent 
D)  less likely to absorb radiation A

Question 4

The most radiosensitive molecule in the body is

Accepted Answer

A)  DNA 
B)  RNA 
C)  nerve cells 
D)  gonadal cells 
A)  DNA 
B)  RNA 
C)  nerve cells 
D)  gonadal cells

Question 5

Compton scattering involves the x-ray photon

Accepted Answer

A)  being absorbed in the atom 
B)  removing an inner-shell electron 
C)  removing a middle- or outer-shell electron 
D)  passing through the atom without any change 
A)  being absorbed in the atom 
B)  removing an inner-shell electron 
C)  removing a middle- or outer-shell electron 
D)  passing through the atom without any change

Question 6

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 7

What is produced as a result of pair production, a(n)
1) positron
2) electron
3) proton

Accepted Answer

A)  positron and electron only 
B)  positron and proton only 
C)  electron and proton only 
D)  positron, electron, and proton 
A)  positron and electron only 
B)  positron and proton only 
C)  electron and proton only 
D)  positron, electron, and proton

Question 8

For photoelectric interactions to occur, the energy of the incident photon

Accepted Answer

A)  may be greater than the binding energy of an inner-shell electron 
B)  may be the same as the binding energy of an inner-shell electron 
C)  may be less than the binding energy of an inner-shell electron 
D)  may be the same or greater than the binding energy of an inner-shell electron 
A)  may be greater than the binding energy of an inner-shell electron 
B)  may be the same as the binding energy of an inner-shell electron 
C)  may be less than the binding energy of an inner-shell electron 
D)  may be the same or greater than the binding energy of an inner-shell electron

Question 9

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)  neutrons and protons being ejected from the nucleus 
A)  positrons being ejected from the nucleus 
B)  neutrons being ejected from the nucleus 
C)  protons being ejected from the nucleus 
D)  neutrons and protons being ejected from the nucleus

Question 10

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

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

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 radiation 
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 radiation

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

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

Question 15

Photodisintegration interactions

Accepted Answer

A)  occur very often during radiographic procedures 
B)  seldom occur during radiographic procedures 
C)  never occur during radiographic procedures 
D)  it depends on the procedure 
A)  occur very often during radiographic procedures 
B)  seldom occur during radiographic procedures 
C)  never occur during radiographic procedures 
D)  it depends on the procedure

Question 16

Air is considered:

Accepted Answer

A)  radiopaque 
B)  hard to penetrate 
C)  radiolucent 
D)  more likely to absorb radiation 
A)  radiopaque 
B)  hard to penetrate 
C)  radiolucent 
D)  more likely to absorb radiation

Question 17

Deoxyribonucleic acid (DNA) is the most sensitive human cell molecule.

Accepted Answer

A) True 
 B)False

Question 18

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

Question 19

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 20

In reference to patient radiation dose, classical scatter interactions

Accepted Answer

A)  slightly increase dose 
B)  significantly increase dose 
C)  have no effect on dose 
D)  slightly decrease dose 
A)  slightly increase dose 
B)  significantly increase dose 
C)  have no effect on dose 
D)  slightly decrease dose

The greater the absorption of radiation

The energy of the photoelectron is equal to

Dense material, like bone, is considered:

The most radiosensitive molecule in the body is

Compton scattering involves the x-ray photon

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

What is produced as a result of pair production, a(n) 1) positron 2) electron 3) proton

For photoelectric interactions to occur, the energy of the incident photon

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

The Compton electron

Photoelectric interactions are more likely to occur in

Most classical scatter photons

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

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

Photodisintegration interactions

Air is considered:

Deoxyribonucleic acid (DNA) is the most sensitive human cell molecule.

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

During a photoelectric interaction,

In reference to patient radiation dose, classical scatter interactions

Introduction to the Imaging Sciences

Structure of the Atom

Electromagnetic and Particulate Radiation

The X-Ray Circuit

The X-Ray Tube

X-Ray Production

Image Production

Image Quality and Characteristics

Digital Image Receptors

Radiographic Exposure Technique

Scatter Control

Exposure Technique Selection

Film-Screen Imaging

Fluoroscopic Imaging

Additional Equipment

Computed Tomography

Filters

Exam 7: X-Ray Interactions With Matter

The greater the absorption of radiation

The energy of the photoelectron is equal to

Dense material, like bone, is considered:

The most radiosensitive molecule in the body is

Compton scattering involves the x-ray photon

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

What is produced as a result of pair production, a(n) 1) positron 2) electron 3) proton

For photoelectric interactions to occur, the energy of the incident photon

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

The Compton electron

Photoelectric interactions are more likely to occur in

Most classical scatter photons

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

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

Photodisintegration interactions

Air is considered:

Deoxyribonucleic acid (DNA) is the most sensitive human cell molecule.

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

During a photoelectric interaction,

In reference to patient radiation dose, classical scatter interactions

Introduction to the Imaging Sciences

Structure of the Atom

Electromagnetic and Particulate Radiation

The X-Ray Circuit

The X-Ray Tube

X-Ray Production

Image Production

Image Quality and Characteristics

Digital Image Receptors

Radiographic Exposure Technique

Scatter Control

Exposure Technique Selection

Film-Screen Imaging

Fluoroscopic Imaging

Additional Equipment

Computed Tomography

Filters