Health Physics for Radiologic Technologists
Practice Questions
Course Introduction
This course introduces the principles and practices of health physics as they apply to radiologic technologists, emphasizing the protection of patients, staff, and the public from unnecessary exposure to ionizing radiation. Topics include the fundamentals of radiation physics, biological effects of radiation, dose measurement and monitoring, regulatory standards, and the implementation of radiation protection techniques in clinical environments. Students will learn to apply knowledge of safe practices, assess risks, and utilize protective equipment and procedures to minimize radiation exposure while maintaining image quality and ensuring compliance with legal and ethical standards.
Recommended Textbook
Radiation Protection in Medical Radiography 7th Edition by Mary Alice
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14 Chapters
340 Verified Questions
340 Flashcards
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Page 2
Chapter 1: Introduction to Radiation Protection
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Sample Questions
Q1) The basic principles of radiation protection include which of the following?
1)Time
2)Distance
3)Shielding
A)1 only
B)2 only
C)3 only
D)1,2,and 3
Answer: D
Q2) Why is a question about the amount of radiation a patient will receive during a specific x-ray procedure difficult to answer?
1)Because the received dose is measured in a number of different units
2)Because scientific units for radiation dose are not comprehensible by the patient
3)Because the patient should not receive any information about radiation dose
A)1 and 2 only
B)1 and 3 only
C)2 and 3 only
D)1,2,and 3
Answer: A
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Chapter 2: Radiation: Types, sources, and Doses Received
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Sample Questions
Q1) Which of the following sources of radiation is human-made?
1)Atmospheric fallout from nuclear weapons testing
2)Cosmic radiation from the sun and beyond the solar system
3)Nuclear power plant accidents as a consequence of natural disasters
A)1 and 2 only
B)1 and 3 only
C)2 and 3 only
D)1,2,and 3
Answer: B
Q2) Terrestrial radiation includes which of the following sources?
A)Long-lived radioactive elements such as uranium-238,radium-226,and thorium-232 that are present in variable quantities in the crust of the earth
B)Radioactive fallout from nuclear weapons tests in which detonation occurred above ground
C)The sun and other stars
D)Video display terminals and television receivers
Answer: A
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4
Chapter 3: Interaction of X-Radiation With Matter
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Sample Questions
Q1) X-rays are carriers of:
A)disease.
B)electrons.
C)fluorescent properties that make them visible.
D)human-made,electromagnetic energy.
Answer: D
Q2) Which of the following interactions results in the conversion of matter into energy?
A)Classical scattering
B)Photoelectric absorption
C)Modified scattering
D)Annihilation reaction
Answer: D
Q3) Which of the following results in all-directional scatter?
A)Classical interaction
B)Coherent interaction
C)Photoelectric interaction
D)Compton interaction
Answer: D
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Chapter 4: Radiation Quantities and Units
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Sample Questions
Q1) If a patient receiving x-ray therapy treatment receives a total dosage of 6000 rads,the dosage may be recorded as _____________ if the SI system is used.
A)12,000 Gy
B)6000 cGy
C)600 mGy
D)60 coulomb per kilogram
Q2) Beta particles are actually:
A)gamma rays.
B)high-speed electrons.
C)protons.
D)x-rays.
Q3) Which of the following units are not SI units?
1)Roentgens
2)Coulombs per kilogram,grays,Sieverts
3)Rads and rems
A)1 only
B)2 only
C)3 only
D)1 and 3 only
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Page 6
Chapter 5: Radiation Monitoring
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Sample Questions
Q1) An electrometer is a device that measures:
A)current.
B)electrical charge.
C)potential difference.
D)voltage.
Q2) Which component(s) of the Geiger-Muller detector alert(s) the operator to the presence of ionizing radiation?
A)The shield covering the probe's sensitivity chamber
B)An audio amplifier and speaker
C)The metal that encloses the counter's gas-filled tube
D)The meter scale
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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Chapter 6: Overview of Cell Biology
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Sample Questions
Q1) During mitosis,which phase of the cellular life cycle is the actual DNA synthesis period?
A)G1
B)G2
C)M
D)S
Q2) Fraternal twins may also be referred to as:
A)dizygotic twins.
B)monozygotic twins.
C)polyzygotic twins.
D)trizygotic twins.
Q3) The cell components that contain the centrioles are the:
A)centrosomes.
B)Golgi apparatus and mitochondria.
C)lysosomes.
D)ribosomes.
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Chapter 7: Molecular and Cellular Radiation Biology
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Sample Questions
Q1) One micron (mm) = __________.
A)10- m
B)10+ m
C)10-³ m
D)10+³ m
Q2) Which of the following humans is most radiosensitive?
A)A mature adult
B)An embryo or fetus during the first trimester of pregnancy
C)A fetus during the third trimester of gestation
D)A 5-year-old child
Q3) Based on current data,which of the following would be considered a safe radiation dose for the gonads of both males and females?
A)5 Gyt
B)3 Gyt
C)1 Gyt
D)0 Gyt
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Chapter 8: Early Deterministic Radiation Effects on Organ Systems
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Sample Questions
Q1) Genetic mutations have been produced in experimental female animals when their ovaries were irradiated with doses as low as:
A)0.10 Gy.
B)0.15 Gy.
C)0.20 Gy.
D)0.25 Gy
Q2) In females the oogonia,the ovarian stem cells:
A)divide and reduce in number only during fetal development.
B)multiply to millions of cells only during fetal development.
C)are not present during fetal life.
D)are present only in very small numbers during fetal life.
Q3) Atrophy refers to:
A)aging of the skin from radiation exposure.
B)shrinkage of organs and tissues after a high radiation dose is received.
C)necrosis of the hypodermis from radiation exposure.
D)wrinkling of the skin from radiation exposure.
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10
Chapter 9: Late Deterministic and Stochastic Radiation
Effects on Organ Systems
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Sample Questions
Q1) After the 1986 nuclear power station accident in Chernobyl,Ukraine,an attempt was made to prevent thyroid cancer in children in Poland and some other countries as a consequence of accidental overdose of iodine-131;_______________ was administered as a substitute for take-up of iodine-131.
A)potassium bromide
B)sodium chloride
C)sodium bicarbonate
D)potassium iodide
Q2) Mutations in genes and DNA that occur at random as natural phenomena are called:
A)deterministic mutations.
B)sporadic mutations.
C)spontaneous mutations.
D)stochastic mutations.
Q3) Radiation dose-response curves can be used to predict the risk of ______________ in human populations that have been exposed to low levels of ionizing radiation.
A)cataract formation
B)genetic effects
C)malignancy
D)spontaneous abortions
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Chapter 10: Dose Limits for Exposure to Ionizing Radiation
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Sample Questions
Q1) Which of the following agencies was previously known as the Atomic Energy Commission?
A)FDA
B)ICRP
C)NCRP
D)NRC
Q2) The main function of the Nuclear Regulatory Commission (NRC) is to:
1)inspect imaging facilities.
2)oversee the nuclear energy industry.
3)regulate imaging facilities.
A)1 only
B)2 only
C)3 only
D)1,2,and 3
Q3) Damage to the reproductive cells of male and female humans that is caused by irradiation of sperm and ova before conception is termed:
A)mutagenesis.
B)optimization.
C)spermaovagenesis.
D)teratogenesis.
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Chapter 11: Equipment Design for Radiation Protection
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Sample Questions
Q1) In standard image intensification fluoroscopy,an x-ray beam half-value-layer (HVL) of 3 to 4.5 mm aluminum is considered acceptable when peak kilovoltage ranges from:
A)50 to 60.
B)60 to 70.
C)70 to 80.
D)80 to 100.
Q2) When the speed of screen-film systems doubles,for example,when changing from a 200-speed to a 400-speed system,patient radiation exposure is ______ by approximately ______.
A)increased,25%
B)increased,50%
C)reduced,25%
D)reduced,50%
Q3) Computed radiography,because of its higher exposure latitude,makes grid use on the pediatric population:
A)absolutely necessary for all radiographic examinations.
B)less necessary than was previously believed.
C)necessary only for extremity examinations.
D)unnecessary for any examination.
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Page 13
Chapter 12: Management of Patient Radiation Dose During Diagnostic X-Ray Procedures
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Sample Questions
Q1) Which of the following is frequently a problem in diagnostic pediatric radiography?
A)Lack of availability of appropriate pediatric immobilization devices
B)Lack of cooperation of parents or guardian
C)Lack of appropriate individuals to assist in holding a pediatric patient during an exposure
D)Patient motion
Q2) Specific area shielding may be selectively used during some x-ray procedures to protect which of the following?
1)Lens of the eye
2)Breast
3)Extremities
A)1 and 2 only
B)1 and 3 only
C)2 and 3 only
D)1,2,and 3
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Page 14
Chapter 13: Management of Imaging Personnel Radiation
Dose During Diagnostic X-Ray Procedures
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Sample Questions
Q1) Protective eyeglasses with optically clear lenses should contain a minimal lead equivalent protection of:
A)0.15 mm.
B)0.25 mm.
C)0.35 mm.
D)0.50 mm.
Q2) For C-arm devices with similar fields of view,the dose rate to personnel located within a meter of the patient is:
A)comparable to that of routine fluoroscopy.
B)far greater than the dose rate of routine fluoroscopy.
C)significantly less than the dose rate of routine fluoroscopy.
D)comparable to that of high-level-control fluoroscopy.
Q3) Which part(s) of a diagnostic x-ray unit should a radiographer avoid touching while a radiographic exposure is in progress?
A)Control panel
B)Exposure switch
C)Kilovoltage control on the control panel
D)Tube housing,collimator,and high-tension cables
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Chapter 14: Radioisotopes and Radiation Protection
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Sample Questions
Q1) Diagnostic techniques in nuclear medicine typically make use of ___________ radioisotopes as radioactive tracers.
A)long-lived
B)short-lived
C)very weak
D)potentially lethal
Q2) During a radiation emergency,the dose limit for individuals engaging in lifesaving activities is:
A)50 mSv per event.
B)100 mSv per event.
C)250 mSv per event.
D)500 mSv per event.
Q3) Each Fluorine-18 (¹ F) nuclear transformation by positron decay yields two highly penetrating _________ photons.
A)250-keV
B)472-keV
C)511-kev
D)777-keV
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