Radiation biology Questions and
Answers| 100% Solved
Which of the following combinations will result in the lowest absorbed dose for the patient
from a 20-film series of dental radiographs? Rectangular collimation with D-speed film
Naturally occurring background radiation includes: Cosmic radiation AND Terrestrial
radiation.
Risk estimates suggest (1) that death is more likely to occur from common activities than from
dental radiographic procedures, and (2) that cancer is much more likely to be unrelated to
radiation exposure. Both statements are true
What specific mechanism of radiation injury may result in the formation of hydrogen peroxide
when x-ray energy is absorbed by patient tissues? Free radical formation created by the
ionization of water may occur.
The ____ radiation received and the ____ the dose rate, the shorter the latent period.
More; faster
1) More radiation damage takes place with high dose rates, 2) because a rapid delivery of
radiation does not allow time for cellular damage to be repaired Both statements are
true
Which of the following statements is/are true of the average dose of background radiation
received by an individual in the United States? The average dose ranges from 150 to 300
millirads. AND Geographic areas at higher elevations are associated with increased amounts of
cosmic radiation.
___ refers to the quantity of radiation received or the total amount of radiation energy
absorbed Total dose
Answers| 100% Solved
Which of the following combinations will result in the lowest absorbed dose for the patient
from a 20-film series of dental radiographs? Rectangular collimation with D-speed film
Naturally occurring background radiation includes: Cosmic radiation AND Terrestrial
radiation.
Risk estimates suggest (1) that death is more likely to occur from common activities than from
dental radiographic procedures, and (2) that cancer is much more likely to be unrelated to
radiation exposure. Both statements are true
What specific mechanism of radiation injury may result in the formation of hydrogen peroxide
when x-ray energy is absorbed by patient tissues? Free radical formation created by the
ionization of water may occur.
The ____ radiation received and the ____ the dose rate, the shorter the latent period.
More; faster
1) More radiation damage takes place with high dose rates, 2) because a rapid delivery of
radiation does not allow time for cellular damage to be repaired Both statements are
true
Which of the following statements is/are true of the average dose of background radiation
received by an individual in the United States? The average dose ranges from 150 to 300
millirads. AND Geographic areas at higher elevations are associated with increased amounts of
cosmic radiation.
___ refers to the quantity of radiation received or the total amount of radiation energy
absorbed Total dose
