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DENTAL RADIOLOGY EXAMS QUESTIONS AND ANWERS
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Terms in this set (146)
____ refers to the quantity of radiation total dose
received or the total amount of radiation
energy absorbed.
Total dose
Dose rate
Amount of tissue
irradiated Cell sensitivity
Which types of cells are more sensitive to 1 and 3
radiation
(1) rapidly dividing, (2) slowly dividing, (3)
young, and/or (4) old?
1 and 3
1 and 4
2 and 3
2 and 4
Which cell would be the most sensitive to blood and bone marrow
x-rays?
Nerve
Mature
Bone
Muscle
Blood and Bone Marrow
Which is a sign or symptom of acute hair loss
radiation syndrome (ARS)?
Genetic defects
Birth abnormalities
Hair loss
Cancer
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____ is/are the single largest contributor to medical radiation
artificial radiation exposure (0.00053
Sv/year).
Consumer products
Medical radiation
Fallout from atomic weapons
The nuclear fuel cycle
Which of the following is considered a hair loss
short-term effect of radiation exposure?
Genetic defects
Birth abnormalities
Hair loss
Cancer
Which is associated with long-term Small amounts of radiation absorbed over a long period
radiation effects?
Symptoms include diarrhea, hair loss, and
hemorrhage.
Small amounts of radiation absorbed over
a long period
Acute radiation syndrome
The injury period in the sequence of
radiation injury is seen within minutes,
days, or weeks of radiation exposure.
One gray is equivalent to____rad(s). 100
1
10
100
1000
The potential risk of dental radiography 3/1,000,000
inducing a fatal cancer in an individual is
about____the risk of a person developing
cancer spontaneously.
3/10
3/100
3/1000
3/1,000,000
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More radiation damage takes place with both statements are true
high dose rates, 2) because a rapid
delivery of radiation does not allow time
for cellular damage to be repaired.
Both statements are
true. Both statements are
false.
The first statement is true, the second
statement is false.
The first statement is false, the second
statement is true.
1) All ionizing radiations are Both statements are true
harmful and produce biologic changes in
living tissue.
2)The amount of radiation used in dental
radiography is small, but biologic damage
does occur.
Both statements are
true. Both statements are
false.
The first statement is true, the second
statement is false.
The first statement is false, the second
statement is true.
Which is the least sensitive to x-rays? salivary glands
Bone marrow
Salivary glands
Lymphoid tissue
Intestines
The collimator ____________ c
a.is a solid piece of aluminum.
b. is fitted within the copper
stem beneath the
molybdenum cup.
c. restricts the size and shape of the x-
ray beam.
d. is always round.
According to the current d
recommendations (2003) of the National
Council on Radiation Protection and
Measurements, the current MPD for an
occupationally exposed pregnant women
is the equivalent of
a.0.05 Sv per month.
b. 0.01 mSv per year.
c. 50 Sv per year.
d. 0.5 mSv per month.
Which of the following types of position- c
indicating devices (PIDs) produces the
most scatter radiation?
a. Rectangular
b. Square
c. Conical
d. Round
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