FLUOROSCOPY EXAM QUESTIONS WITH
COMPLETE SOLUTIONS
A "high radiation area" is an area in which individuals could
receive a dose equivalent greater than how much radiation in
one hour.
a) 50 mSv
b) 0.05 mSv
c) 0.1 mSv
d) 0.25 mSv
e) 1 mSv Correct Answers e) 1 mSv
Explanation:
A "high radiation area" is one in which there exists radiation
levels that could result in an individual receiving a dose
equivalent in excess of 1 mSv in 1 hour at 30 cm from the
radiation source.
A grainy or blotchy appearance of a fluoroscopic image is a
result of: select all that apply
a) Low number of absorbed photons
b) Statistical fluctuations
c) Quantum mottle
,d) Poor contrast Correct Answers Low number of absorbed
photons, Statistical fluctuations, and Quantum mottle
Explanation:
Quantum mottle is the grainy appearance in an image caused by
statistical fluctuation of absorbed x-ray photons. Additionally,
when a low number of photons are absorbed, any photons
released as a result of statistical fluctuations (mottle) will have a
greater effect on image quality.
a measurement of the image intensifier ability to convert the X-
ray from The Remnant beam into the brightest possible image is:
Correct Answers brightness game
A measurement used to indicate the biological damage to living
tissue is: Correct Answers Dose equivalent
A term describing the penetrating power of an X-ray: Correct
Answers Quality,or. kvp.
A unit of radiation exposure describing the ionization of atoms
in air is: Correct Answers Roentgen
Ability of the image intensifier to increase the illumination level
of the image best defines:
A) magnification
B) flux gain
C) brightness gain
D) minification Correct Answers c) brightness gian
,Explanation:
The increased illumination of the image is attributable to the
multiplication of light photos at the output phospor compared
with x-rays at the input phosphor and the image minification
from input phosphor to Output phosphor.
According to the California Radiation Control Regulations, what
is the limit for occupational whole-body dose equivalent
radiation exposure for adults (age older than 18 years)?
a) 50 mSv per calendar quarter
b) 5 mSv per calendar quarter
c) 12.5 mSv per calendar quarter
d) 25 mSv per calendar quarter Correct Answers 12.5 mSv per
calendar quarter.
Explanation:
The occupational whole-body dose equivalent for persons over
18 years of age is 50 mSv per year, 12.5 mSv per quarter.
According to the Law of Bergonie and Tribondeau,
radiosensitivity depends on:
a) The life cycle of the exposed cell
b) The degree of mitotic activity of the cells
, c) The number of undifferentiated cells
d) All of the above Correct Answers All of the above
Explanation:
The law of Bergonie and Tribondeau states, "The
radiosensitivity of tissues depends on the number of
undifferentiated cells which the tissue contains, the degree of
mitotic activity in the tissue, and the length of time the cells of
the tissue stay in active proliferation.
According to the National Council on Radiation Protection and
Measurements (NCRP), how many days after the onset of
menses is it safest to perform x-rays?
Greater than 2 weeks
10-14 days
0-5 days
6-9 days Correct Answers 10 to 14 days
Explanation:
According to the N.C.R.P. , 10 to 14 days after the onset of
menses it is improbable that a woman would be pregnant and so
this is the safest time to perform x-ray examinations.
adjusting the collimator serves two functions:
COMPLETE SOLUTIONS
A "high radiation area" is an area in which individuals could
receive a dose equivalent greater than how much radiation in
one hour.
a) 50 mSv
b) 0.05 mSv
c) 0.1 mSv
d) 0.25 mSv
e) 1 mSv Correct Answers e) 1 mSv
Explanation:
A "high radiation area" is one in which there exists radiation
levels that could result in an individual receiving a dose
equivalent in excess of 1 mSv in 1 hour at 30 cm from the
radiation source.
A grainy or blotchy appearance of a fluoroscopic image is a
result of: select all that apply
a) Low number of absorbed photons
b) Statistical fluctuations
c) Quantum mottle
,d) Poor contrast Correct Answers Low number of absorbed
photons, Statistical fluctuations, and Quantum mottle
Explanation:
Quantum mottle is the grainy appearance in an image caused by
statistical fluctuation of absorbed x-ray photons. Additionally,
when a low number of photons are absorbed, any photons
released as a result of statistical fluctuations (mottle) will have a
greater effect on image quality.
a measurement of the image intensifier ability to convert the X-
ray from The Remnant beam into the brightest possible image is:
Correct Answers brightness game
A measurement used to indicate the biological damage to living
tissue is: Correct Answers Dose equivalent
A term describing the penetrating power of an X-ray: Correct
Answers Quality,or. kvp.
A unit of radiation exposure describing the ionization of atoms
in air is: Correct Answers Roentgen
Ability of the image intensifier to increase the illumination level
of the image best defines:
A) magnification
B) flux gain
C) brightness gain
D) minification Correct Answers c) brightness gian
,Explanation:
The increased illumination of the image is attributable to the
multiplication of light photos at the output phospor compared
with x-rays at the input phosphor and the image minification
from input phosphor to Output phosphor.
According to the California Radiation Control Regulations, what
is the limit for occupational whole-body dose equivalent
radiation exposure for adults (age older than 18 years)?
a) 50 mSv per calendar quarter
b) 5 mSv per calendar quarter
c) 12.5 mSv per calendar quarter
d) 25 mSv per calendar quarter Correct Answers 12.5 mSv per
calendar quarter.
Explanation:
The occupational whole-body dose equivalent for persons over
18 years of age is 50 mSv per year, 12.5 mSv per quarter.
According to the Law of Bergonie and Tribondeau,
radiosensitivity depends on:
a) The life cycle of the exposed cell
b) The degree of mitotic activity of the cells
, c) The number of undifferentiated cells
d) All of the above Correct Answers All of the above
Explanation:
The law of Bergonie and Tribondeau states, "The
radiosensitivity of tissues depends on the number of
undifferentiated cells which the tissue contains, the degree of
mitotic activity in the tissue, and the length of time the cells of
the tissue stay in active proliferation.
According to the National Council on Radiation Protection and
Measurements (NCRP), how many days after the onset of
menses is it safest to perform x-rays?
Greater than 2 weeks
10-14 days
0-5 days
6-9 days Correct Answers 10 to 14 days
Explanation:
According to the N.C.R.P. , 10 to 14 days after the onset of
menses it is improbable that a woman would be pregnant and so
this is the safest time to perform x-ray examinations.
adjusting the collimator serves two functions:
