Oklahoma Radiation Safety & Protection
Exam with Complete Solutions
a higher mA setting requires less what to make an image on film - ANSWER-time
A lead collimator is added to the tubehead to restrict what? - ANSWER-Size of the
beam
Absorbed Dose is - ANSWER-measure of radiation absorbed by living tissues.
Rad (rad)- radiation absorbed dose- customary unit
Gray (Gy)- metric unit
Acceptable radiographs have: - ANSWER-Area of interest, minimal distortion,
surrounding area as needed, 2 mm of bone on PA, open contacts, proper density,
proper contrast, and clarity
Acute Radiation Syndrome (ARS) - ANSWER-large radiation dose in a short amount of
time
Age - ANSWER-Children and unborn babies, especially 1st trimester, are more
radiosensitive than adults
Aluminum equivalent filter is added to the tubehead to remove what? - ANSWER-soft x-
rays
Are dental x-rays ionizing? - ANSWER-Yes
Are there any evidence of catarats from dental x-rays? - ANSWER-No
Area Involved - ANSWER-Larger the area involved, the greater the biological effect
Autotransformer does what - ANSWER-adjusts for small fluctuations in the current
Bitewing image - ANSWER-Crowns and part of the bone of both maxillary and
mandibular teeth can be seen in the same image. Contacts must be open to be
diagnostic.
Can phosphor plates be erased and reused? - ANSWER-Yes
Cells reproduce at through a process called what? - ANSWER-Mitosis
Contrast - ANSWER-Shading of the radiograph
, Cumulative Effect - ANSWER-when healing does not occur or when repeated
exposures happen too close together
Density - ANSWER-Darkness
dental machines vary from what numbers in mA - ANSWER-7-15 mA
Dental radiation is: - ANSWER-Ionizing
Dental radiation makes up what % of background radiation - ANSWER-0.10%
Digital Imaging - ANSWER-uses a receptor that is exposed to x-rays to get a digitized
image
Direct Theory is - ANSWER-Damage happens when photons actually hit critical parts of
cells
Does the ADA recommend all pregnant dental personnel wear bage dosimeters -
ANSWER-Yes
Dose Rate - ANSWER-frequency of exposures. (how often do they occur)
Dr. C. Edmond Kells - ANSWER-Cancer of the hands and committed suicide
Dr. William Rollins - ANSWER-gave warnings after burns to hand and created the first
collimator.
Electromagnetic radiation - ANSWER-Bundles of energy that travel through space in a
wave.
Electromagnetic radiation waves include: - ANSWER-radio, microwaves, TV waves,
light, sunlight, x-rays, and gamma rays
Electromagnetic spectrum - ANSWER-All electromagnetic energy arranged in order
according to wavelength and strength
Electrons - ANSWER-negative and orbit around nucleus
Embryological Effects - ANSWER-Harm to growing fetus
Equivalent Dose - ANSWER-compares the biological effects of different types of
radiation on tissues of the body. Rem (rem)-Roentgen Equivalent Man-customary unit;
Sievert (Sv)-metric unit
Examples of radioresistant cells - ANSWER-Muscle cells, nerve cells, mature bone
cells, liver cells, kidney cells, brain cells
Exam with Complete Solutions
a higher mA setting requires less what to make an image on film - ANSWER-time
A lead collimator is added to the tubehead to restrict what? - ANSWER-Size of the
beam
Absorbed Dose is - ANSWER-measure of radiation absorbed by living tissues.
Rad (rad)- radiation absorbed dose- customary unit
Gray (Gy)- metric unit
Acceptable radiographs have: - ANSWER-Area of interest, minimal distortion,
surrounding area as needed, 2 mm of bone on PA, open contacts, proper density,
proper contrast, and clarity
Acute Radiation Syndrome (ARS) - ANSWER-large radiation dose in a short amount of
time
Age - ANSWER-Children and unborn babies, especially 1st trimester, are more
radiosensitive than adults
Aluminum equivalent filter is added to the tubehead to remove what? - ANSWER-soft x-
rays
Are dental x-rays ionizing? - ANSWER-Yes
Are there any evidence of catarats from dental x-rays? - ANSWER-No
Area Involved - ANSWER-Larger the area involved, the greater the biological effect
Autotransformer does what - ANSWER-adjusts for small fluctuations in the current
Bitewing image - ANSWER-Crowns and part of the bone of both maxillary and
mandibular teeth can be seen in the same image. Contacts must be open to be
diagnostic.
Can phosphor plates be erased and reused? - ANSWER-Yes
Cells reproduce at through a process called what? - ANSWER-Mitosis
Contrast - ANSWER-Shading of the radiograph
, Cumulative Effect - ANSWER-when healing does not occur or when repeated
exposures happen too close together
Density - ANSWER-Darkness
dental machines vary from what numbers in mA - ANSWER-7-15 mA
Dental radiation is: - ANSWER-Ionizing
Dental radiation makes up what % of background radiation - ANSWER-0.10%
Digital Imaging - ANSWER-uses a receptor that is exposed to x-rays to get a digitized
image
Direct Theory is - ANSWER-Damage happens when photons actually hit critical parts of
cells
Does the ADA recommend all pregnant dental personnel wear bage dosimeters -
ANSWER-Yes
Dose Rate - ANSWER-frequency of exposures. (how often do they occur)
Dr. C. Edmond Kells - ANSWER-Cancer of the hands and committed suicide
Dr. William Rollins - ANSWER-gave warnings after burns to hand and created the first
collimator.
Electromagnetic radiation - ANSWER-Bundles of energy that travel through space in a
wave.
Electromagnetic radiation waves include: - ANSWER-radio, microwaves, TV waves,
light, sunlight, x-rays, and gamma rays
Electromagnetic spectrum - ANSWER-All electromagnetic energy arranged in order
according to wavelength and strength
Electrons - ANSWER-negative and orbit around nucleus
Embryological Effects - ANSWER-Harm to growing fetus
Equivalent Dose - ANSWER-compares the biological effects of different types of
radiation on tissues of the body. Rem (rem)-Roentgen Equivalent Man-customary unit;
Sievert (Sv)-metric unit
Examples of radioresistant cells - ANSWER-Muscle cells, nerve cells, mature bone
cells, liver cells, kidney cells, brain cells
