Radiation Protection In Medical Radiography:
Questions And Correct Answers
The amount of energy per unit mass absorbed by an irradiated object (e.g., the
patient's body tissue). Correct Answer - absorbed dose (D)
(T/F) Air kerma actually denotes a calculation of radiation intensity in air.
Correct Answer - True
Designated for use in the description of population or group exposure from
low doses of different sources of ionizing radiation. Correct Answer -
collective effective dose equivalent (ColEfD)
Basic SI unit of electric charge. It represents the quantity of electrical charge
flowing past a point in a circuit in 1 second when an electrical current of 1
ampere is used. Correct Answer - coulomb (C)
Which of the following is essentially the sum total of air kerma over the
exposed area of the patient's body surface?
a. Equivalent dose
b. Absorbed dose
c. Effective dose
d. Dose area product Correct Answer - d. Dose area product
The average of energy deposited by ionizing radiation in an object per unit
length of track as it passes through the object. It is expressed in units of
keV/μm. Correct Answer - linear energy transfer (LET)
Quantity that is used for radiation protection purposes to provide a measure
of the overall risk of exposure to humans from ionizing radiation. Correct
Answer - effective dose (EfD)
A radiation quantity used for radiation protection purposes when a person
receives exposure from various types of ionizing radiation. Correct Answer
- Equivalent dose (EqD)
, The amount of ionizing radiation that may strike an object such as the human
body when in the vicinity of a radiation source. Measured in coulombs per
kilogram (C/kg) or roentgens (R) Correct Answer - exposure (X)
In the diagnostic radiology energy range (which includes mammography)
from 23 to 150 kVp, which of the following tissues possesses the greatest
ability to absorb radiant energy through the process of photoelectric
absorption? Correct Answer - Bone
Which of the following effects must be measured to determine the total
amount of radiation exposure in a specific volume of dry air under standard
conditions of pressure and temperature (760 mm Hg or 1 atmosphere at sea
level and 22° C)?
a. Quantity of ionization
b. Energy absorption
c. Cellular activity
d. Biologic damage Correct Answer - a. Quantity of ionization
(T/F) When x-rays were discovered, a charge was being passed through a
pear-shaped, partial vacuum discharge tube. Light was seen emanating from a
piece of paper coated with calcium tungstate that lay on a bench several feet
away Correct Answer - False
Short-term somatic effects of radiation include which of the following?
1. nausea and fatigue
2. blood and intestinal disorders
3. diffuse redness of the skin and shedding of its outer layer Correct Answer
- 1, 2, & 3
The quantity 45 rem equals _____ mSv. Correct Answer - 450
One millirem equals _____ rem. Correct Answer - 1/1000
Which of the following is the SI unit of radiation exposure? Correct Answer
- C/kg
Questions And Correct Answers
The amount of energy per unit mass absorbed by an irradiated object (e.g., the
patient's body tissue). Correct Answer - absorbed dose (D)
(T/F) Air kerma actually denotes a calculation of radiation intensity in air.
Correct Answer - True
Designated for use in the description of population or group exposure from
low doses of different sources of ionizing radiation. Correct Answer -
collective effective dose equivalent (ColEfD)
Basic SI unit of electric charge. It represents the quantity of electrical charge
flowing past a point in a circuit in 1 second when an electrical current of 1
ampere is used. Correct Answer - coulomb (C)
Which of the following is essentially the sum total of air kerma over the
exposed area of the patient's body surface?
a. Equivalent dose
b. Absorbed dose
c. Effective dose
d. Dose area product Correct Answer - d. Dose area product
The average of energy deposited by ionizing radiation in an object per unit
length of track as it passes through the object. It is expressed in units of
keV/μm. Correct Answer - linear energy transfer (LET)
Quantity that is used for radiation protection purposes to provide a measure
of the overall risk of exposure to humans from ionizing radiation. Correct
Answer - effective dose (EfD)
A radiation quantity used for radiation protection purposes when a person
receives exposure from various types of ionizing radiation. Correct Answer
- Equivalent dose (EqD)
, The amount of ionizing radiation that may strike an object such as the human
body when in the vicinity of a radiation source. Measured in coulombs per
kilogram (C/kg) or roentgens (R) Correct Answer - exposure (X)
In the diagnostic radiology energy range (which includes mammography)
from 23 to 150 kVp, which of the following tissues possesses the greatest
ability to absorb radiant energy through the process of photoelectric
absorption? Correct Answer - Bone
Which of the following effects must be measured to determine the total
amount of radiation exposure in a specific volume of dry air under standard
conditions of pressure and temperature (760 mm Hg or 1 atmosphere at sea
level and 22° C)?
a. Quantity of ionization
b. Energy absorption
c. Cellular activity
d. Biologic damage Correct Answer - a. Quantity of ionization
(T/F) When x-rays were discovered, a charge was being passed through a
pear-shaped, partial vacuum discharge tube. Light was seen emanating from a
piece of paper coated with calcium tungstate that lay on a bench several feet
away Correct Answer - False
Short-term somatic effects of radiation include which of the following?
1. nausea and fatigue
2. blood and intestinal disorders
3. diffuse redness of the skin and shedding of its outer layer Correct Answer
- 1, 2, & 3
The quantity 45 rem equals _____ mSv. Correct Answer - 450
One millirem equals _____ rem. Correct Answer - 1/1000
Which of the following is the SI unit of radiation exposure? Correct Answer
- C/kg
