Question 1

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)  A and B 
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)  A and B D

Question 2

Pair production:

Accepted Answer

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

Question 3

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 the above 
A)  photoelectric interactions 
B)  transmitted photons 
C)  differential absorption 
D)  all of the above D

Question 4

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 
A)  is very heavy 
B)  can be made very thick 
C)  is inexpensive 
D)  has a high atomic number

Question 5

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 the above 
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 the above

Question 6

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

Accepted Answer

A) True 
 B)False

Question 7

Barium is used as a contrast agent to visualize soft tissue structures such as the stomach because it:

Accepted Answer

A)  is very heavy 
B)  can be made very thick 
C)  is inexpensive 
D)  has a high atomic number 
A)  is very heavy 
B)  can be made very thick 
C)  is inexpensive 
D)  has a high atomic number

Question 8

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

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

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 the above 
A)  are typically high energy 
B)  usually exit the patient and interact with the image receptor 
C)  contribute to patient dose 
D)  none of the above

Question 11

To minimize occupational exposure,the technologist should:

Accepted Answer

A)  never go in an x-ray room during a procedure 
B)  wear protective apparel (lead aprons,gloves,etc. )when in the room during imaging 
C)  stand close to the patient's head 
D)  B and C 
A)  never go in an x-ray room during a procedure 
B)  wear protective apparel (lead aprons,gloves,etc. )when in the room during imaging 
C)  stand close to the patient's head 
D)  B and C

Question 12

Compton scattering typically occurs with:

Accepted Answer

A)  low-energy photons 
B)  high-energy photons 
C)  moderate-energy photons 
D)  all of the above 
A)  low-energy photons 
B)  high-energy photons 
C)  moderate-energy photons 
D)  all of the above

Question 13

With Compton scattering,the incident photon:

Accepted Answer

A)  loses none of its energy 
B)  loses up to one third of its energy 
C)  loses up to one half of its energy 
D)  does not lose any energy 
A)  loses none of its energy 
B)  loses up to one third of its energy 
C)  loses up to one half of its energy 
D)  does not lose any energy

Question 14

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 15

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)  is the same energy as the incident photon 
D)  continues traveling in the same direction as the incident photon 
A)  is lower energy than the incident photon 
B)  is higher energy than the incident photon 
C)  is the same energy as the incident photon 
D)  continues traveling in the same direction as the incident photon

Question 16

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

Question 17

Excessive absorption is the result of:

Accepted Answer

A)  using a mAs that is too low for the examination 
B)  using a kVp that is too low for the examination 
C)  using a kVp that is too high for the examination 
D)  all of the above 
A)  using a mAs that is too low for the examination 
B)  using a kVp that is too low for the examination 
C)  using a kVp that is too high for the examination 
D)  all of the above

Question 18

The effect of classical scatter interactions on image quality:

Accepted Answer

A)  is significant 
B)  is minimal 
C)  is that quality is improved 
D)  none of the above 
A)  is significant 
B)  is minimal 
C)  is that quality is improved 
D)  none of the above

Question 19

The probability of a photoelectric interaction depends on the energy level of the incident x-ray photon.

Accepted Answer

A) True 
 B)False

Question 20

Compton scattering results in:

Accepted Answer

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

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

Pair production:

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

Protective apparel is often made of lead because it:

After a photoelectric interaction,the incident photon:

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

Barium is used as a contrast agent to visualize soft tissue structures such as the stomach because it:

Reducing the amount of Compton scattering:

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

Secondary photons produced during a Compton interaction:

To minimize occupational exposure,the technologist should:

Compton scattering typically occurs with:

With Compton scattering,the incident photon:

Air is considered:

The x-ray photon produced during classical scattering:

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

Excessive absorption is the result of:

The effect of classical scatter interactions on image quality:

The probability of a photoelectric interaction depends on the energy level of the incident x-ray photon.

Compton scattering results in:

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

Pair production:

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

Protective apparel is often made of lead because it:

After a photoelectric interaction,the incident photon:

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

Barium is used as a contrast agent to visualize soft tissue structures such as the stomach because it:

Reducing the amount of Compton scattering:

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

Secondary photons produced during a Compton interaction:

To minimize occupational exposure,the technologist should:

Compton scattering typically occurs with:

With Compton scattering,the incident photon:

Air is considered:

The x-ray photon produced during classical scattering:

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

Excessive absorption is the result of:

The effect of classical scatter interactions on image quality:

The probability of a photoelectric interaction depends on the energy level of the incident x-ray photon.

Compton scattering results in:

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