MOSBYS COMPREHENSIVE REVIEW OF RADIOGRAPHY-
CHALLENGE TEST #2 WITH CORRECT ANSWERS (2026/2027)
The annual of radiation deposited per unit length of tissue traversed by incoming
photons is called: - ANSWER-Linear energy transfer (LET)
cataractogenesis, life span shortening, embryologic effects, and carcinogenesis are
examples of - ANSWER-long term somatic effects
compton interaction: - ANSWER-Decreases contrast in the radiographic image
Gray, multiplied by a radiation weighting factor equals - ANSWER-Sievert
effective dose limit - ANSWER-is the level of radiation that an organism can receive and
probaby sustain no appreciable effects
radiation with a high LET: - ANSWER-is highly ionizing
Radiation protection is based on which dose response relationship? - ANSWER-linear-
nonthreshold
which of the following states that the radiosensitivity of cells is directly proportional to
their degree of differentiation - ANSWER-Law of Bergonie and Tribondeau
which of the following causes about 95% of cellular response to radiation - ANSWER-
indirect effect
when radiation strikes DNA, which of the following occurs? - ANSWER-Direct effect
the amount of radiation that causes the number of genetic mutations in a population to
double is called the - ANSWER-Doubling Dose
the SI units of equivalent dose, activity, air kerma, and absorbed dose are, respectively:
- ANSWER-Sievert, becquerel, gray and gray in air
Medical xrays are an example of: - ANSWER-Artificially produced radiation
the effective dose limit for a fetus for the entire gestational period is - ANSWER-5.0 mSv
the photoelectric effect - ANSWER-results in absorption of the incident photon
the annual effective dose limit for radiographers is - ANSWER-50 mSv
the average dose to active bone marrow as an indicator of somatic effects on a
population is called - ANSWER-Mean Marrow Dose (MMD)
, a radiation dose that if received by the entire population would cause the same genetic
injury as the total of doses received by the members actually being exposed is called -
ANSWER-Genetically significant dose
a lead apron of at least what thickness should be worn while being exposed to scatter
radiation - ANSWER-0.50 mm PB equivalent
use of a thyroid shield of at least what thickness should be used for fluoroscopy -
ANSWER-0.50 mm Pb equivalent
how thick are primary protective barriers - ANSWER-1/16 inch lead equivalent
Primary protective barriers, if in the walll, must extend to a height of at least - ANSWER-
7 feet
secondary protective barriers must extend to a height of - ANSWER-the ceiling
the protective curtain hanging from the flluoroscopy tower must be at least - ANSWER-
0.25 mm Pb equivalent
the Bucky slot cover must be at least - ANSWER-0.25 mm Pb equivalent
Filters made of aluminum and copper are placed in the film badge to measure xrays -
ANSWER-energy
film badges are changed - ANSWER-Monthly
thermoluminescent dosimeters use what type of crystals to record dose - ANSWER-
lithium fluoride
TLDs are heated and release what type of energy to indicate dose - ANSWER-Visible
light
optically stimulated luminescence - ANSWER-10 uSv
the recording material in an OSL dosimeter is - ANSWER-Aluminum oxide
the energy stored in an OSL dosimeter is released when the dosimeter is exposed to -
ANSWER-Laser
OSL dosimeters may be worn for - ANSWER-3 months
OSL dosimeters may be scanned and reanalyzed - ANSWER-an unlimited number of
times
CHALLENGE TEST #2 WITH CORRECT ANSWERS (2026/2027)
The annual of radiation deposited per unit length of tissue traversed by incoming
photons is called: - ANSWER-Linear energy transfer (LET)
cataractogenesis, life span shortening, embryologic effects, and carcinogenesis are
examples of - ANSWER-long term somatic effects
compton interaction: - ANSWER-Decreases contrast in the radiographic image
Gray, multiplied by a radiation weighting factor equals - ANSWER-Sievert
effective dose limit - ANSWER-is the level of radiation that an organism can receive and
probaby sustain no appreciable effects
radiation with a high LET: - ANSWER-is highly ionizing
Radiation protection is based on which dose response relationship? - ANSWER-linear-
nonthreshold
which of the following states that the radiosensitivity of cells is directly proportional to
their degree of differentiation - ANSWER-Law of Bergonie and Tribondeau
which of the following causes about 95% of cellular response to radiation - ANSWER-
indirect effect
when radiation strikes DNA, which of the following occurs? - ANSWER-Direct effect
the amount of radiation that causes the number of genetic mutations in a population to
double is called the - ANSWER-Doubling Dose
the SI units of equivalent dose, activity, air kerma, and absorbed dose are, respectively:
- ANSWER-Sievert, becquerel, gray and gray in air
Medical xrays are an example of: - ANSWER-Artificially produced radiation
the effective dose limit for a fetus for the entire gestational period is - ANSWER-5.0 mSv
the photoelectric effect - ANSWER-results in absorption of the incident photon
the annual effective dose limit for radiographers is - ANSWER-50 mSv
the average dose to active bone marrow as an indicator of somatic effects on a
population is called - ANSWER-Mean Marrow Dose (MMD)
, a radiation dose that if received by the entire population would cause the same genetic
injury as the total of doses received by the members actually being exposed is called -
ANSWER-Genetically significant dose
a lead apron of at least what thickness should be worn while being exposed to scatter
radiation - ANSWER-0.50 mm PB equivalent
use of a thyroid shield of at least what thickness should be used for fluoroscopy -
ANSWER-0.50 mm Pb equivalent
how thick are primary protective barriers - ANSWER-1/16 inch lead equivalent
Primary protective barriers, if in the walll, must extend to a height of at least - ANSWER-
7 feet
secondary protective barriers must extend to a height of - ANSWER-the ceiling
the protective curtain hanging from the flluoroscopy tower must be at least - ANSWER-
0.25 mm Pb equivalent
the Bucky slot cover must be at least - ANSWER-0.25 mm Pb equivalent
Filters made of aluminum and copper are placed in the film badge to measure xrays -
ANSWER-energy
film badges are changed - ANSWER-Monthly
thermoluminescent dosimeters use what type of crystals to record dose - ANSWER-
lithium fluoride
TLDs are heated and release what type of energy to indicate dose - ANSWER-Visible
light
optically stimulated luminescence - ANSWER-10 uSv
the recording material in an OSL dosimeter is - ANSWER-Aluminum oxide
the energy stored in an OSL dosimeter is released when the dosimeter is exposed to -
ANSWER-Laser
OSL dosimeters may be worn for - ANSWER-3 months
OSL dosimeters may be scanned and reanalyzed - ANSWER-an unlimited number of
times
