Radiation Protection in Medical Imaging Exam Practice Tests
Course Introduction
This course provides a comprehensive overview of radiation protection principles and practices specific to medical imaging environments. Students will learn about the sources and biological effects of ionizing radiation, dose measurement and monitoring, and regulatory frameworks guiding safe imaging practices. The curriculum emphasizes strategies for minimizing exposure to patients, healthcare workers, and the public, including the use of shielding, proper equipment operation, and the application of the ALARA (As Low As Reasonably Achievable) principle. Case studies and practical scenarios will help students develop the skills necessary to implement effective radiation safety protocols in diverse clinical settings.
Recommended Textbook Radiation Protection in Medical Radiography 7th Edition by Mary Sherer
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Chapter 1: Introduction to Radiation Protection
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Sample Questions
Q1) Typically,people are more willing to accept a risk if they perceive that the potential benefit to be obtained is:
A) greater than the risk involved.
B) equal to the risk involved.
C) less than the risk involved.
D) typically, people are not willing to accept risk no matter how great the benefit may be.
Answer: A
Q2) The millisievert (mSv) is equal to:
A) 1/10 of a sievert.
B) 1/100 of a sievert.
C) 1/1000 of a sievert.
D) 1/10,000 of a sievert.
Answer: C
Q3) X-rays are a form of which of the following kinds of radiation?
A) Environmental
B) Ionizing
C) Internal
D) Nonionizing
Answer: B
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Page 3
Chapter 2: Radiation: Types, Sources, and Doses Received
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Sample Questions
Q1) Both occupational and nonoccupational dose limits may be stated in:
1)coulombs per kilogram.
2)grays.
3)Sieverts.
A) 1 only
B) 2 only
C) 3 only
D) 1, 2, and 3
Answer: C
Q2) When natural sources of ionizing radiation become increased because of accidental or deliberate human actions such as mining,they are referred to as:
A) artificial sources.
B) enhanced natural sources.
C) extraterrestrial sources.
D) manmade sources.
Answer: B
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Chapter 3: Interaction of X-Radiation With Matter
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Sample Questions
Q1) Compton scattering is synonymous with:
A) coherent scattering.
B) incoherent scattering.
C) photoelectric absorption.
D) photodisintegration.
Answer: B
Q2) Which two interactions between x-radiation and matter may result in the production of small-angle scatter?
A) Photoelectric absorption and Compton scattering
B) Coherent scattering and Compton scattering
C) Photoelectric absorption and pair production
D) Coherent scattering and pair production
Answer: B
Q3) Which of the following is not another term for coherent scattering?
A) Characteristic
B) Classical
C) Elastic
D) Unmodified
Answer: A
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Page 5
Chapter 4: Radiation Quantities and Units
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Sample Questions
Q1) In the diagnostic radiology energy range from 23 to 150 kVp (which includes mammography),which of the following tissues possesses the greatest ability to absorb radiant energy through the process of photoelectric absorption?
A) Air
B) Bone
C) Fat
D) Muscle
Q2) Which of the following effects must be measured to determine the total amount of radiation exposure in a specific volume of dry air under standard conditions of pressure and temperature (760 mm Hg or 1 atmosphere at sea level and 22° C)?
A) Biologic damage
B) Cellular activity
C) Energy absorption
D) Quantity of ionization
Q3) Which of the following statements is true?
A) 100 rem = 1 centisievert
B) 10 rem = 1 centisievert
C) 1 rem = 1 centisievert
D) 0.1 rem = 1 centisievert
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Page 6
Chapter 5: Radiation Monitoring
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Sample Questions
Q1) Of the following personnel monitoring devices,which device could be used to provide immediate exposure readout for a radiation worker working in a cardiac catheterization laboratory?
A) Film badge dosimeter
B) Optically stimulated luminescence (OSL) dosimeter
C) Pocket ionization chamber
D) Thermoluminescent dosimeter (TLD)
Q2) Which of the following devices contains an aluminum oxide detector?
A) Film badge dosimeter
B) Optically stimulated luminescence dosimeter
C) Pocket ionization chamber
D) Thermoluminescent dosimeter
Q3) What do optically stimulated luminescence dosimeters (OSLs),thermoluminescent dosimeters,film badge dosimeters,and pocket ionization chambers have in common?
A) These devices are all used for area monitoring.
B) These devices all use the same sensing material to detect ionizing radiation.
C) These devices are all used for personnel monitoring.
D) Each of these devices can only be used for personnel monitoring for a maximum of 6 months.
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Page 7
Chapter 6: Overview of Cell Biology
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Sample Questions
Q1) Which of the following is essentially a "protein machine" that segregates chromosomes to two daughter cells during the cell division process?
A) Endoplasmic reticulum
B) Mitotic spindle
C) Mitochondria
D) Golgi apparatus
Q2) What is a highly coiled strand that is one of two duplicated portions of DNA in a replicated chromosome that appear during cell division identified as?
A) A centrosome
B) A centromere
C) A chromatid
D) A curl
Q3) Adenine bonds only with:
A) cytosine.
B) guanine.
C) hydrogen.
D) thymine.
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Chapter 7: Molecular and Cellular Radiation Biology
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Sample Questions
Q1) Direct action may occur after exposure to any type of radiation,but it is much more likely to happen after exposure to:
A) low-LET radiation such as x-rays.
B) low-LET radiation such as gamma rays.
C) high-LET radiation such as alpha particles.
D) nonionizing radiation such as microwaves.
Q2) A periodic blood count is not recommended as a method for monitoring occupational radiation exposure because:
1)biologic damage from ionizing radiation cannot be determined from a blood test.
2)biologic damage has already been sustained when an irregularity is seen in the blood count.
3)a traditional blood count is a relatively insensitive test that is unable to indicate exposures of less than 10 cGy.
A) 1 only
B) 2 only
C) 3 only
D) 2 and 3 only
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Chapter 8: Early Deterministic Radiation Effects on Organ Systems
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Sample Questions
Q1) Some local tissues sustain immediate consequences from high radiation doses.Examples of such tissues include:
1)bone marrow.
2)male and female reproductive organs.
3)skin.
A) 1 and 2 only
B) 1 and 3 only
C) 2 and 3 only
D) 1, 2, and 3
Q2) Research has shown that repeated radiation injuries have a:
A) cumulative effect.
B) quadratic effect.
C) sigmoidal effect.
D) threshold effect.
Q3) The correct order of development of the male germ cell from the stem cell phase to the mature cell is:
A) spermatogonia, spermatocyte, spermatid, sperm.
B) spermatocyte, spermatogonia, spermatid, sperm.
C) spermatid, spermatogonia, spermatocyte, sperm.
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D) sperm, spermatid, spermatogonia, spermatocyte.
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Chapter 9: Late Deterministic and Stochastic Radiation
Effects on Organ Systems
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Sample Questions
Q1) Studies of postpartum patients treated with ionizing radiation for relief of mastitis are a group of individuals in whom the results of radiation exposure to healthy breast tissue indicate that radiation:
A) can cause breast cancer.
B) cannot cause breast cancer.
C) can cause breast enlargement.
D) can cause breast shrinkage.
Q2) Which of the following groups of people exposed to ionizing radiation provide proof that low-level radiation exposure produces late effects?
A) 135,000 evacuees from the 1986 nuclear power plant accident at Chernobyl, Ukraine
B) Japanese atomic bomb survivors
C) Children of the Marshall Islanders who were inadvertently subjected to fallout during the atomic bomb test in 1954
D) None of the above
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Chapter 10: Dose Limits for Exposure to Ionizing Radiation
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Sample Questions
Q1) The essential concept underlying radiation protection is that:
A) any organ in the human body is vulnerable to damage from exposure to ionizing radiation.
B) only critical organs in the human body are vulnerable to damage from exposure to ionizing radiation.
C) only the reproductive organs in male and female humans are vulnerable to damage from exposure to ionizing radiation.
D) no organ in the human body is vulnerable to damage from exposure to ionizing radiation.
Q2) The responsibility for maintaining radiation monitoring records for all personnel and for providing counseling for individuals who receive monitor readings in excess of allowable limits belongs to the:
A) director of human resources of a health care facility.
B) designated radiation safety officer of a health care facility.
C) hospital administrator.
D) radiologic technologist in charge of quality control.
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Chapter 11: Equipment Design for Radiation Protection
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Sample Questions
Q1) Digital radiography images can be accessed:
A) at only one workstation at a time, thereby decreasing convenience for physicians providing patient care.
B) at no more than two workstations at a time, thereby decreasing convenience for physicians providing patient care.
C) at several workstations at the same time, making image viewing very convenient for physicians providing patient care.
D) digital images cannot be accessed at any workstations by physicians.
Q2) The control panel,where technical exposure factors are selected and seen on indicators by the equipment operator,must be located:
A) at the foot end of the radiographic examining table.
B) at the head end of the radiographic examining table.
C) behind a suitable protective barrier that has a radiation-absorbent window that permits observation of the patient during any procedure.
D) behind any regular wall that has a regular glass window that permits observation of the patient during any procedure.
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13
Chapter 12: Management of Patient Radiation Dose During Diagnostic
X-Ray
Procedures
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Sample Questions
Q1) In the event that a pregnant patient is inadvertently irradiated:
A) the radiographer performing the examination should perform the calculations necessary to determine fetal dose.
B) the imaging department manager should perform the calculations necessary to determine fetal dose.
C) the radiologic physicist should perform the calculations necessary to determine fetal dose.
D) the radiologist should perform the calculations necessary to determine fetal dose.
Q2) Because most medical procedures result in fetal exposures:
A) greater than 5 Gy, the risk of abnormality is large.
B) greater than 1 Gy, the risk of abnormality is large.
C) less than 0.5 Gy but greater than 0.01 Gy, the risk of abnormality is small.
D) less than 0.01 Gy, the risk of abnormality is small.
Q3) Of the following radiologic procedures,which is(are) considered nonessential?
A) A chest x-ray on scheduled admission to the hospital
B) Lumbar spine x-rays as part of a preemployment physical examination
C) Whole-body multislice computed tomography (CT) screening
D) All of the above
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Chapter 13: Management of Imaging Personnel Radiation
Dose During Diagnostic X-Ray Procedures
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Sample Questions
Q1) To ensure that the lifetime risk of occupationally exposed persons remains acceptable,the lifetime effective dose in mSv should not exceed:
A) the occupationally exposed person's age in years.
B) 5 times the occupationally exposed person's age in years.
C) 10 times the occupationally exposed person's age in years.
D) 20 times the occupationally exposed person's age in years.
Q2) Whenever scattered radiation decreases,the radiographer's exposure:
A) decreases.
B) increases slightly.
C) increases considerably.
D) remains the same.
Q3) Which of the following is another term for use factor (U)?
A) Workload factor
B) Occupancy factor in controlled and uncontrolled areas
C) Beam direction factor
D) Protective barrier thickness consideration factor
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15
Chapter 14: Radioisotopes and Radiation Protection
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Sample Questions
Q1) Considering the design of the medical imaging suites listed below,which suite presents the most unique additional radiation safety problems?
A) Computer radiography suite
B) PET and CT imaging suite
C) Digital mammography suite
D) Digital fluoroscopy suite
Q2) Tellurium-125 (¹² Te) has:
A) 125 protons and 125 neutrons.
B) 75 protons and 63 neutrons.
C) 52 protons and 73 neutrons.
D) 45 protons and 58 neutrons.
Q3) While a patient receiving Iodine-131 (¹³¹I) therapy is hospitalized,a large,_________,rolling lead shield can be positioned between the patient and any attending personnel for protection.
A) up to 1-inch-thick
B) 2-inch-thick
C) 3-inch-thick
D) 6-inch-thick
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