Fluoroscopy: Radiation Protection and Safety Questions
With Complete Solutions
1 Ci is equal to __________ Bq Correct Answers 3.7 x 10^10
1 rad equals ______ Gy. Correct Answers 0.01
A 1-Gy dose is equal to _ joule (J) of radiation energy absorbed
per kilogram of organ or tissue weight.
a. 3
b. 4
c. 2
d. 1 Correct Answers d.
a chest radiograph delivers a dose of ______, roughly the same
radiation dose received from making 2 or 3 coast-to-coast airline
flights.
a. 0.1 mSv (10 mrem)
b. 0.5 rem
c. 1 Sv
d. 10 rad Correct Answers a.
A cine unit requires more output than a fluoroscopy unit, usually
__________ times higher than fluoroscopy, hence the need for
careful use.
a. 1-2
b. 2-4
c. 10-20
,d. 25-50 Correct Answers c.
A dose-limiting technique such as the 15% rule states that
increasing the kVp by 15% decreases the mAs by ______.
Correct Answers 50%
According to NCRP Report No. 116,
The specific objectives of radiation protection are: Correct
Answers 1. to prevent the occurrence of clinically significant
radiation induced deterministic effects by adhering to dose limits
that are below the apparent threshold levels.
2. to limit the risk of stochastic effects, cancer and genetic
effects to a reasonable level in relation to societal needs, values,
benefits gained and economic factors.
According to the Joint Commission, the dose delivered during
fluoroscopy should be limited to _________ under normal
circumstances. Correct Answers 0.1 Gy (10 rad) per minute
Acute radiation syndrome or bone marrow syndrome occurs at
____________. Correct Answers 1-10 Gy or 100-1000 rad
Acute somatic effects occur when a dose of approximately
______ or greater is applied to the entire body over a short
period of time. Correct Answers 0.1 Gy (10 rad)
All available evidence indicates that immediate medically
expressed radiation damage does not occur below doses of
__________ in most exposed individuals. Correct Answers 0.5
Gy (50 rad)
, An abdominal, kidney-ureters-bladder
(KUB) or pelvic radiographic examination delivers a fetal dose
of about _________________. Correct Answers 2 mGy (200
mrad)
An exposure of 10 mGy can be equated to an LLE of
_________, based on the linear nonthreshold model of radiation
response. Correct Answers 1.5 days
Areas fully occupied by an individual, such as administrative or
clerical offices, have an occupancy factor of 1, whereas
corridors and employee lounges have an occupancy factor of
________. Correct Answers 1/5
Cells that are nonspecialized or divide rapidly tend to be
affected at ___________ than those that are more specialized or
divide more slowly. Correct Answers lower radiation doses.
Central nervous system syndrome occurs at _________. Correct
Answers >50 Gy or >5000 rad
CT examinations make up about ______ of all radiologic
examinations in the United States, yet they deliver
approximately ___ of the effective dose to the U.S. population.
Correct Answers 10%,
75%
Data collected from the Biological Effects of Ionizing Radiation
(BEIR) VII, Phase 2 study indicate that approximately ______
With Complete Solutions
1 Ci is equal to __________ Bq Correct Answers 3.7 x 10^10
1 rad equals ______ Gy. Correct Answers 0.01
A 1-Gy dose is equal to _ joule (J) of radiation energy absorbed
per kilogram of organ or tissue weight.
a. 3
b. 4
c. 2
d. 1 Correct Answers d.
a chest radiograph delivers a dose of ______, roughly the same
radiation dose received from making 2 or 3 coast-to-coast airline
flights.
a. 0.1 mSv (10 mrem)
b. 0.5 rem
c. 1 Sv
d. 10 rad Correct Answers a.
A cine unit requires more output than a fluoroscopy unit, usually
__________ times higher than fluoroscopy, hence the need for
careful use.
a. 1-2
b. 2-4
c. 10-20
,d. 25-50 Correct Answers c.
A dose-limiting technique such as the 15% rule states that
increasing the kVp by 15% decreases the mAs by ______.
Correct Answers 50%
According to NCRP Report No. 116,
The specific objectives of radiation protection are: Correct
Answers 1. to prevent the occurrence of clinically significant
radiation induced deterministic effects by adhering to dose limits
that are below the apparent threshold levels.
2. to limit the risk of stochastic effects, cancer and genetic
effects to a reasonable level in relation to societal needs, values,
benefits gained and economic factors.
According to the Joint Commission, the dose delivered during
fluoroscopy should be limited to _________ under normal
circumstances. Correct Answers 0.1 Gy (10 rad) per minute
Acute radiation syndrome or bone marrow syndrome occurs at
____________. Correct Answers 1-10 Gy or 100-1000 rad
Acute somatic effects occur when a dose of approximately
______ or greater is applied to the entire body over a short
period of time. Correct Answers 0.1 Gy (10 rad)
All available evidence indicates that immediate medically
expressed radiation damage does not occur below doses of
__________ in most exposed individuals. Correct Answers 0.5
Gy (50 rad)
, An abdominal, kidney-ureters-bladder
(KUB) or pelvic radiographic examination delivers a fetal dose
of about _________________. Correct Answers 2 mGy (200
mrad)
An exposure of 10 mGy can be equated to an LLE of
_________, based on the linear nonthreshold model of radiation
response. Correct Answers 1.5 days
Areas fully occupied by an individual, such as administrative or
clerical offices, have an occupancy factor of 1, whereas
corridors and employee lounges have an occupancy factor of
________. Correct Answers 1/5
Cells that are nonspecialized or divide rapidly tend to be
affected at ___________ than those that are more specialized or
divide more slowly. Correct Answers lower radiation doses.
Central nervous system syndrome occurs at _________. Correct
Answers >50 Gy or >5000 rad
CT examinations make up about ______ of all radiologic
examinations in the United States, yet they deliver
approximately ___ of the effective dose to the U.S. population.
Correct Answers 10%,
75%
Data collected from the Biological Effects of Ionizing Radiation
(BEIR) VII, Phase 2 study indicate that approximately ______
