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