Ch. 4 Practice Questions Flashcards
Which of the following served as the first unit used to measure exposure to ionizing radiations?
Skin erythema
To determine the total amount of radiation exposure in a specific volume of dry air under standard conditions of pressure and temperature, the effect that must be measured is:
Quantity of ionization. Air kerma
Which of the following provides a method by which to calculate the effective absorbed dose for all types of ionizing radiations?
Absorbed dose equivalent
Which of the following is the SI unit of exposure?
Coulomb per kilogram
The ionizing radiations that produce virtually the same biological effects for equal absorbed doses in body tissue are:
X-rays, beta particles, and gamma rays
The amount of energy per unit mass transferred from an x-ray beam to an object is called the:
Absorbed dose
The measurement of ionization produced by x-ray or gamma ray photons in the air defines only:
Exposure
Which of the following factors can be multiplied to determine absorbed dose equivalent?
- Rad x quality factor
2. gray x quality factor
In the SI; 1 J of energy absorbed from any type of ionizing radiation in 1 kg of any irradiated object equals:
1 Gray
If a patient receiving x-ray therapy treatment receives a total dosage of 6,000 rad, the dosage may be recorded as ___ is SI is used.
6,000 Gray
200 rem equals ___mSv
2,000 mSv
Which of the following is used to adjust the absorbed dose value to measure biological effects of different types of ionizing radiation?
Quality factor
Which of the following equivalents equals 1 rad?
- 100 erg/g
- 1/100 J/Kg
- 0.01 Gray
All of the above
Which of the following units are not SI units?
- Roentgen
- Coulomb per Kg, Gray, Sievert
- Rad and Rem
Roentgen and rad/rem
1 millirem equals ___ rem.
1/1000
