TEST BANK For Radiologic Science for Technologists, 12th
Edition by Stewart C Bushong, Verified Chapters 1 - 40,
Complete Newest Version
Radiodermatitis - ANSWER: Stochastic effect of Radiation that you get by not
wearing protective gloves, causing callused, discolored weathered, catches, flakey
skin on hands and forearms
Deterministic effects of Radiation exposure produce ____ radiation exposure -
ANSWER: high
Stochastic effects of Radiation exposure produce ____ doses of Radiation over time -
ANSWER: low
Stochastic effects use ______ nonthreshold dose respose relationships - ANSWER:
linear
Deterministic effects use ___________ threshold response relationships - ANSWER:
nonlinear
Radiation exposure experience by persons in diagnostic imaging are lowdose and
___ ________ __________ (???) - ANSWER: low linear energy transfer (LET)
Prodromal period - ANSWER: immediate respose to radiation sickness above 100 rad
including vomiting, diarrhea and reduced WBC count
Latent period - ANSWER: Time after exposure where there is no sign of Radiation
sickness
How much rad is exposed for Hematologic Syndrome to potentially occur? -
ANSWER: 200-1000 rad
What happens with hematologic syndrome? - ANSWER: reduced WBC , RBC , &
platelets
How much rad is exposed for GI syndrome to occur? - ANSWER: 1000-5000 rad T
What happens with GI syndrome? - ANSWER: cells in intestinal lining are damaged
How much rad is exposed for CNS syndrome to occur? - ANSWER: 5000+ rad
Atrophy - ANSWER: Shrinkage of an organ is tissue caused by cell death
Skin cancer is a __________ dose response relationship - ANSWER: threshold
, Breast cancer is _____________ dose response relationship - ANSWER:
Nonthreshold
What is the theory of Radiation hormesis? - ANSWER: Low doses are beneficial and
may stimulate molecular repair and immunologic response mechanisms
Low dose, chronic irradiation does or does not impair fertility? - ANSWER: does not
What is mean survival time? - ANSWER: As Radiation increases, time between
exposure and death decreases
Radiation induced genetic effects after levels of exposure in Radiology is ___. -
ANSWER: zero
xray tube housing reduces __________ - ANSWER: leakage
Leakage radiation must be less than ___ mGya/hr at distance in 1m from the
protective housing - ANSWER: 1
Control panel must indicate the conditions of __________when xray tube is
energized using kvP and mA. - ANSWER: exposure
SID Source to image indicator must be within ___% if the indicated SID - ANSWER: 2
xray beam and light beam must coincide within __% of the SID - ANSWER: 2
Collimation - ANSWER: restriction of useful xray beam to reduce patient dose and
improve image contrast
Xray tubes designed for Mammography have __ ųm Mo to ___ ųm Rh filtration -
ANSWER: 30 to 60
It does no good to align the light field and xray beam if the _____ _______ is not
aligned - ANSWER: Image receptor
Xray beams must have a total filtration of at least __ mm AL when operated at 70
kvp - ANSWER: 2.5
Xray tubes operated between 50kvp to 70 kvp must have at least ___ mm AL
filtration - ANSWER: 1.5
Xray tubes operated less than 50kvp need at least __ mm AL filtration - ANSWER: 0.5
SSD Skin to source distance must not be less than ___ cm on stationary Fluoroscopes
and not less than __ on mobile Fluoroscopes - ANSWER: 38; 30
Edition by Stewart C Bushong, Verified Chapters 1 - 40,
Complete Newest Version
Radiodermatitis - ANSWER: Stochastic effect of Radiation that you get by not
wearing protective gloves, causing callused, discolored weathered, catches, flakey
skin on hands and forearms
Deterministic effects of Radiation exposure produce ____ radiation exposure -
ANSWER: high
Stochastic effects of Radiation exposure produce ____ doses of Radiation over time -
ANSWER: low
Stochastic effects use ______ nonthreshold dose respose relationships - ANSWER:
linear
Deterministic effects use ___________ threshold response relationships - ANSWER:
nonlinear
Radiation exposure experience by persons in diagnostic imaging are lowdose and
___ ________ __________ (???) - ANSWER: low linear energy transfer (LET)
Prodromal period - ANSWER: immediate respose to radiation sickness above 100 rad
including vomiting, diarrhea and reduced WBC count
Latent period - ANSWER: Time after exposure where there is no sign of Radiation
sickness
How much rad is exposed for Hematologic Syndrome to potentially occur? -
ANSWER: 200-1000 rad
What happens with hematologic syndrome? - ANSWER: reduced WBC , RBC , &
platelets
How much rad is exposed for GI syndrome to occur? - ANSWER: 1000-5000 rad T
What happens with GI syndrome? - ANSWER: cells in intestinal lining are damaged
How much rad is exposed for CNS syndrome to occur? - ANSWER: 5000+ rad
Atrophy - ANSWER: Shrinkage of an organ is tissue caused by cell death
Skin cancer is a __________ dose response relationship - ANSWER: threshold
, Breast cancer is _____________ dose response relationship - ANSWER:
Nonthreshold
What is the theory of Radiation hormesis? - ANSWER: Low doses are beneficial and
may stimulate molecular repair and immunologic response mechanisms
Low dose, chronic irradiation does or does not impair fertility? - ANSWER: does not
What is mean survival time? - ANSWER: As Radiation increases, time between
exposure and death decreases
Radiation induced genetic effects after levels of exposure in Radiology is ___. -
ANSWER: zero
xray tube housing reduces __________ - ANSWER: leakage
Leakage radiation must be less than ___ mGya/hr at distance in 1m from the
protective housing - ANSWER: 1
Control panel must indicate the conditions of __________when xray tube is
energized using kvP and mA. - ANSWER: exposure
SID Source to image indicator must be within ___% if the indicated SID - ANSWER: 2
xray beam and light beam must coincide within __% of the SID - ANSWER: 2
Collimation - ANSWER: restriction of useful xray beam to reduce patient dose and
improve image contrast
Xray tubes designed for Mammography have __ ųm Mo to ___ ųm Rh filtration -
ANSWER: 30 to 60
It does no good to align the light field and xray beam if the _____ _______ is not
aligned - ANSWER: Image receptor
Xray beams must have a total filtration of at least __ mm AL when operated at 70
kvp - ANSWER: 2.5
Xray tubes operated between 50kvp to 70 kvp must have at least ___ mm AL
filtration - ANSWER: 1.5
Xray tubes operated less than 50kvp need at least __ mm AL filtration - ANSWER: 0.5
SSD Skin to source distance must not be less than ___ cm on stationary Fluoroscopes
and not less than __ on mobile Fluoroscopes - ANSWER: 38; 30
