Question 1

During the process of coherent scattering,the incident x-ray photon interacts with:

Accepted Answer

A) a single inner shell electron,ejecting it from its orbit. 
B) a single outer shell electron,ejecting it from its orbit. 
C) an atom transferring its energy by causing some or all of the electrons of the atom to vibrate momentarily and radiate energy in the form of electromagnetic waves. 
D) a scattered photon of lesser energy,annihilating it. 
A) a single inner shell electron,ejecting it from its orbit. 
B) a single outer shell electron,ejecting it from its orbit. 
C) an atom transferring its energy by causing some or all of the electrons of the atom to vibrate momentarily and radiate energy in the form of electromagnetic waves. 
D) a scattered photon of lesser energy,annihilating it. C

Question 2

The x-ray photon energy required to initiate pair production is:

Accepted Answer

A) 0.511 keV. 
B) 1.022 keV. 
C) 0.511 MeV. 
D) 1.022 MeV. 
A) 0.511 keV. 
B) 1.022 keV. 
C) 0.511 MeV. 
D) 1.022 MeV. D

Question 3

What is the term for the number of x-rays emitted per inner-shell vacancy during the process of photoelectric absorption?

Accepted Answer

A) Characteristic absorption 
B) Classical gain 
C) Fluorescent yield 
D) Modified pair production 
A) Characteristic absorption 
B) Classical gain 
C) Fluorescent yield 
D) Modified pair production C

Question 4

Which of the following is not a type of interaction between x-radiation and biologic matter?

Accepted Answer

A) Compton scattering 
B) Bremsstrahlung 
C) Pair production 
D) Photoelectric absorption 
A) Compton scattering 
B) Bremsstrahlung 
C) Pair production 
D) Photoelectric absorption

Question 5

Which of the following is not another term for coherent scattering?

Accepted Answer

A) Characteristic 
B) Classical 
C) Elastic 
D) Unmodified 
A) Characteristic 
B) Classical 
C) Elastic 
D) Unmodified

Question 6

Which of the following results in all-directional scatter?

Accepted Answer

A) Classical interaction 
B) Coherent interaction 
C) Photoelectric interaction 
D) Compton interaction 
A) Classical interaction 
B) Coherent interaction 
C) Photoelectric interaction 
D) Compton interaction

Question 7

Which of the following terms refers to the radiation that occurs when an electron drops down from an outer orbit to fill a vacancy in an inner orbit of the parent atom?

Accepted Answer

A) Characteristic radiation 
B) Bremsstrahlung 
C) Photoelectric radiation 
D) Primary radiation 
A) Characteristic radiation 
B) Bremsstrahlung 
C) Photoelectric radiation 
D) Primary radiation

Question 8

Annihilation radiation is used in which of the following modalities?

Accepted Answer

A) Computed tomography (CT) 
B) Digital mammography 
C) Positron emission tomography (PET) 
D) Computed radiography (CR) 
A) Computed tomography (CT) 
B) Digital mammography 
C) Positron emission tomography (PET) 
D) Computed radiography (CR)

Question 9

When a vacancy exists in an inner electron shell of an atom (as a result of photoelectric effect,Compton scattering,or bombardment by other electrons),the energy liberated when this vacancy is filled,instead of emerging from the atom as fluorescent radiation,can be transferred to another electron of the atom,thereby ejecting the electron.Such an emitted electron is called a(n):

Accepted Answer

A) Auger electron. 
B) Compton electron. 
C) Edison electron. 
D) Sievert electron. 
A) Auger electron. 
B) Compton electron. 
C) Edison electron. 
D) Sievert electron.

Question 10

The probability of occurrence of photoelectric absorption _________ as the energy of the incident photon decreases and the atomic number of the irradiated atoms _________.

Accepted Answer

A) increases markedly,decreases 
B) decreases markedly,increases 
C) increases markedly,increases 
D) stays the same,increases 
A) increases markedly,decreases 
B) decreases markedly,increases 
C) increases markedly,increases 
D) stays the same,increases

Question 11

Compton scattering is synonymous with:

Accepted Answer

A) coherent scattering. 
B) incoherent scattering. 
C) photoelectric absorption. 
D) photodisintegration. 
A) coherent scattering. 
B) incoherent scattering. 
C) photoelectric absorption. 
D) photodisintegration.

Question 12

Particles associated with electromagnetic radiation that have no mass or electric charge are:

Accepted Answer

A) ions. 
B) negatrons. 
C) positrons. 
D) x-ray photons. 
A) ions. 
B) negatrons. 
C) positrons. 
D) x-ray photons.

Question 13

Which of the following interactions results in the conversion of matter into energy?

Accepted Answer

A) Classical scattering 
B) Photoelectric absorption 
C) Modified scattering 
D) Annihilation reaction 
A) Classical scattering 
B) Photoelectric absorption 
C) Modified scattering 
D) Annihilation reaction

Question 14

What is the effective atomic number of compact bone?

Accepted Answer

A) 5.9 
B) 7.4 
C) 7.6 
D) 13.8 
A) 5.9 
B) 7.4 
C) 7.6 
D) 13.8

Question 15

Which two interactions between x-radiation and matter may result in the production of small-angle scatter?

Accepted Answer

A) Photoelectric absorption and Compton scattering 
B) Coherent scattering and Compton scattering 
C) Photoelectric absorption and pair production 
D) Coherent scattering and pair production 
A) Photoelectric absorption and Compton scattering 
B) Coherent scattering and Compton scattering 
C) Photoelectric absorption and pair production 
D) Coherent scattering and pair production

Question 16

Radiographic density is:

Accepted Answer

A) caused by photodisintegration. 
B) defined as the degree of overall blackening on a completed radiograph. 
C) not affected by milliampere-seconds (mAs). 
D) not relevant in the production of a diagnostic radiograph. 
A) caused by photodisintegration. 
B) defined as the degree of overall blackening on a completed radiograph. 
C) not affected by milliampere-seconds (mAs). 
D) not relevant in the production of a diagnostic radiograph.

Question 17

Fluorescent radiation is also known as:

Accepted Answer

A) characteristic radiation. 
B) coherent scattering. 
C) Compton scattering. 
D) unmodified scattering. 
A) characteristic radiation. 
B) coherent scattering. 
C) Compton scattering. 
D) unmodified scattering.

Question 18

Differences in density level between radiographic images of adjacent structures as seen in a completed radiograph define:

Accepted Answer

A) image attenuation. 
B) radiographic contrast. 
C) radiographic density. 
D) photodisintegration. 
A) image attenuation. 
B) radiographic contrast. 
C) radiographic density. 
D) photodisintegration.

Question 19

Which of the following particles is considered to be a form of antimatter?

Accepted Answer

A) Electron 
B) Positron 
C) X-ray photon 
D) Scattered x-ray photon 
A) Electron 
B) Positron 
C) X-ray photon 
D) Scattered x-ray photon

Question 20

X-rays are carriers of:

Accepted Answer

A) disease. 
B) electrons. 
C) fluorescent properties that make them visible. 
D) human-made,electromagnetic energy. 
A) disease. 
B) electrons. 
C) fluorescent properties that make them visible. 
D) human-made,electromagnetic energy.

During the process of coherent scattering,the incident x-ray photon interacts with:

The x-ray photon energy required to initiate pair production is:

What is the term for the number of x-rays emitted per inner-shell vacancy during the process of photoelectric absorption?

Which of the following is not a type of interaction between x-radiation and biologic matter?

Which of the following is not another term for coherent scattering?

Which of the following results in all-directional scatter?

Which of the following terms refers to the radiation that occurs when an electron drops down from an outer orbit to fill a vacancy in an inner orbit of the parent atom?

Annihilation radiation is used in which of the following modalities?

The probability of occurrence of photoelectric absorption _ as the energy of the incident photon decreases and the atomic number of the irradiated atoms _.

Compton scattering is synonymous with:

Particles associated with electromagnetic radiation that have no mass or electric charge are:

Which of the following interactions results in the conversion of matter into energy?

What is the effective atomic number of compact bone?

Which two interactions between x-radiation and matter may result in the production of small-angle scatter?

Radiographic density is:

Fluorescent radiation is also known as:

Differences in density level between radiographic images of adjacent structures as seen in a completed radiograph define:

Which of the following particles is considered to be a form of antimatter?

X-rays are carriers of:

Introduction to Radiation Protection

Radiation: Types, sources, and Doses Received

Radiation Quantities and Units

Radiation Monitoring

Overview of Cell Biology

Molecular and Cellular Radiation Biology

Early Deterministic Radiation Effects on Organ Systems

Late Deterministic and Stochastic Radiation Effects on Organ Systems

Dose Limits for Exposure to Ionizing Radiation

Equipment Design for Radiation Protection

Management of Patient Radiation Dose During Diagnostic X-Ray Procedures

Management of Imaging Personnel Radiation Dose During Diagnostic X-Ray Procedures

Radioisotopes and Radiation Protection

Filters

Exam 3: Interaction of X-Radiation With Matter

During the process of coherent scattering,the incident x-ray photon interacts with:

The x-ray photon energy required to initiate pair production is:

What is the term for the number of x-rays emitted per inner-shell vacancy during the process of photoelectric absorption?

Which of the following is not a type of interaction between x-radiation and biologic matter?

Which of the following is not another term for coherent scattering?

Which of the following results in all-directional scatter?

Which of the following terms refers to the radiation that occurs when an electron drops down from an outer orbit to fill a vacancy in an inner orbit of the parent atom?

Annihilation radiation is used in which of the following modalities?

The probability of occurrence of photoelectric absorption _________ as the energy of the incident photon decreases and the atomic number of the irradiated atoms _________.

Compton scattering is synonymous with:

Particles associated with electromagnetic radiation that have no mass or electric charge are:

Which of the following interactions results in the conversion of matter into energy?

What is the effective atomic number of compact bone?

Which two interactions between x-radiation and matter may result in the production of small-angle scatter?

Radiographic density is:

Fluorescent radiation is also known as:

Differences in density level between radiographic images of adjacent structures as seen in a completed radiograph define:

Which of the following particles is considered to be a form of antimatter?

X-rays are carriers of:

Introduction to Radiation Protection

Radiation: Types, sources, and Doses Received

Radiation Quantities and Units

Radiation Monitoring

Overview of Cell Biology

Molecular and Cellular Radiation Biology

Early Deterministic Radiation Effects on Organ Systems

Late Deterministic and Stochastic Radiation Effects on Organ Systems

Dose Limits for Exposure to Ionizing Radiation

Equipment Design for Radiation Protection

Management of Patient Radiation Dose During Diagnostic X-Ray Procedures

Management of Imaging Personnel Radiation Dose During Diagnostic X-Ray Procedures

Radioisotopes and Radiation Protection

Filters

The probability of occurrence of photoelectric absorption _ as the energy of the incident photon decreases and the atomic number of the irradiated atoms _.