Radiology I Final Exam Questions and
Answerslatest 2024
Primary Radiation -correct answer radiation that exits the tubehead
Coherent Scatter (Thompson scatter) is characterized by an x-ray photon that interacts
with matter and then: -correct answer does not produce ionization but changes direction
Both x-rays and visible light -correct answer are considered part of the electromagnetic
spectrum
The specific mechanism of radiation injury that may result in the formation of hydrogen
peroxide when x-ray energy is absorbed by pt tissues is -correct answer free radical
formation created by the ionization of water
True regarding the direct theory of radiation injury -correct answer according to the
direct theory, cells suffer from the effects of x-ray photons damaging a critical cell
component
The component in the x-ray machine that has more turns in the secondary coil than
primary coil is the -correct answer step-up transformer
This device restricts the size and shape of the x-ray beam -correct answer collimator
Causes foreshortening in a radiograph -correct answer vertical angulation of BID is
excessive
when a 16 inch target-to-film distance is changed to an 8 inch target-to-film distance
while the kVp and mA are kept constant, what change should be made in the exposure
time in order to produce a radiograph of the same intensity? -correct answer Decrease
the exposure time one-fourth
The term used to designate a single unit or bundle of ionizing energy is -correct answer
photon
the type of dose-response curve used in dental radiology is -correct answer non-
threshold, linear
Forms of particulate radiation -correct answer alpha, beta, and cathode
This is TRUE -correct answer Frequency is the number of wavelengths passing a given
point in a given amt of time.
A hygienist is taking a maxillary right canine PA using the paralleling technique. The
usual position of the PID is -correct answer the PID is set up at positive vertical
angulation and is pointed downward
, Radiology I Final Exam Questions and
Answerslatest 2024
Cells more sensitive to radiation -correct answer rapidly dividing and young
primary use of the btwx x-ray images -correct answer examination of the alveolar crest
and interproximal areas
the kilovoltage control regulates all EXCEPT -correct answer heating of the filament
Most radiosensitive tissues -correct answer hematopoietic
a mutation which produces change in the person exposed to ionizing radiation but does
not produce mutations in subsequent generations is known as -correct answer somatic
effect
Unit of radiation of absorbed dose -correct answer Gray (Gy)
For dental radiography, the req. diameter size of the radiation beam at the pts skin is -
correct answer 2.75 inches
which organ tissues are considered critical in dental radiography? -correct answer skin,
thyroid gland, eyes and bone marrow
in order to produce thermionic emission in the x-ray tube, this is req... -correct answer
the step-down transformer and circuit
in a standard x-ray machine, about 70% of the x-radiations produced at the source in
the x-ray tube are called -correct answer Bremsstrahlung
At a distance of 4 ft from the x-ray tube, the measurement of radiation is 80mSv. What
would the measurement of radiation be at a distance of 2 ft? -correct answer 320 mSv
the material in the target of the anode in dental x-ray tube is -correct answer Tungsten
Some standard x-ray machines set exposure time in impulses. How many impulses in a
second? -correct answer 60
The formation of the electron cloud in the production of x-rays is produced through a
process of -correct answer thermionic emission
true about Bremsstrahlung radiation -correct answer it is the same as general radiation
which film size is used for posterior teeth and is the "Standard Size"? -correct answer
size 2
ionization is -correct answer the gain or loss of electrons
Answerslatest 2024
Primary Radiation -correct answer radiation that exits the tubehead
Coherent Scatter (Thompson scatter) is characterized by an x-ray photon that interacts
with matter and then: -correct answer does not produce ionization but changes direction
Both x-rays and visible light -correct answer are considered part of the electromagnetic
spectrum
The specific mechanism of radiation injury that may result in the formation of hydrogen
peroxide when x-ray energy is absorbed by pt tissues is -correct answer free radical
formation created by the ionization of water
True regarding the direct theory of radiation injury -correct answer according to the
direct theory, cells suffer from the effects of x-ray photons damaging a critical cell
component
The component in the x-ray machine that has more turns in the secondary coil than
primary coil is the -correct answer step-up transformer
This device restricts the size and shape of the x-ray beam -correct answer collimator
Causes foreshortening in a radiograph -correct answer vertical angulation of BID is
excessive
when a 16 inch target-to-film distance is changed to an 8 inch target-to-film distance
while the kVp and mA are kept constant, what change should be made in the exposure
time in order to produce a radiograph of the same intensity? -correct answer Decrease
the exposure time one-fourth
The term used to designate a single unit or bundle of ionizing energy is -correct answer
photon
the type of dose-response curve used in dental radiology is -correct answer non-
threshold, linear
Forms of particulate radiation -correct answer alpha, beta, and cathode
This is TRUE -correct answer Frequency is the number of wavelengths passing a given
point in a given amt of time.
A hygienist is taking a maxillary right canine PA using the paralleling technique. The
usual position of the PID is -correct answer the PID is set up at positive vertical
angulation and is pointed downward
, Radiology I Final Exam Questions and
Answerslatest 2024
Cells more sensitive to radiation -correct answer rapidly dividing and young
primary use of the btwx x-ray images -correct answer examination of the alveolar crest
and interproximal areas
the kilovoltage control regulates all EXCEPT -correct answer heating of the filament
Most radiosensitive tissues -correct answer hematopoietic
a mutation which produces change in the person exposed to ionizing radiation but does
not produce mutations in subsequent generations is known as -correct answer somatic
effect
Unit of radiation of absorbed dose -correct answer Gray (Gy)
For dental radiography, the req. diameter size of the radiation beam at the pts skin is -
correct answer 2.75 inches
which organ tissues are considered critical in dental radiography? -correct answer skin,
thyroid gland, eyes and bone marrow
in order to produce thermionic emission in the x-ray tube, this is req... -correct answer
the step-down transformer and circuit
in a standard x-ray machine, about 70% of the x-radiations produced at the source in
the x-ray tube are called -correct answer Bremsstrahlung
At a distance of 4 ft from the x-ray tube, the measurement of radiation is 80mSv. What
would the measurement of radiation be at a distance of 2 ft? -correct answer 320 mSv
the material in the target of the anode in dental x-ray tube is -correct answer Tungsten
Some standard x-ray machines set exposure time in impulses. How many impulses in a
second? -correct answer 60
The formation of the electron cloud in the production of x-rays is produced through a
process of -correct answer thermionic emission
true about Bremsstrahlung radiation -correct answer it is the same as general radiation
which film size is used for posterior teeth and is the "Standard Size"? -correct answer
size 2
ionization is -correct answer the gain or loss of electrons
