QUESTIONS AND VERIFIED ANSWERS | GRADED A+| PASS ON FIRST
Which of the following statements are correct regarding the link between radiation dose and
genetic effects? - ANSWER The link has been demonstrated in animal studies. Increased
risk to humans cannot be predicted with respect to an individual.
Which of the following changes in kilovoltage (kvp) will result in the greatest reduction of
patient dose, when miliampere-seconds (mas) is adjusted to compensate for the change? -
ANSWER increase kvp by 30%
Which radiographic imaging system uses storage phosphors to temporarily store energy
representing the image signal? - ANSWER computer radiography
What is the primary purpose of using gonad shields during radiography? - ANSWER
Reduce the likelihood of genetic effects.
Which of the following are types of gonad shields? - ANSWER Contact and shadow
When should gonad shielding be used? - ANSWER when the gonads are within 5 cm. Of
the radiation field.
The greatest cause of unnecessary radiation to patients that can be controlled by the limited
operator is: - ANSWER repeat exposure
The limited operator can reduce repeat exposures by : - ANSWER clearly instructing the
patients.
1
, How does the x-ray beam restriction minimize patient exposure - ANSWER It limits the
radiation field to the area of interest.
What is the device that allows the limited operator to vary the size of the radiation field? -
ANSWER collimator
How does filtration reduce patient exposure - ANSWER Removes longer-wavelength
photons
What is the National Council on Radiation Protection and Measurements (NCRP)
recommendation for the amount of total filtration? - ANSWER 2.5 mm Al equiv
What are the three principal methods used to protect limited operators from unnecessary
radiation exposure? - ANSWER Time, Distance, and Shielding
Which of the following is NOT a type of personnel radiation shielding? - ANSWER Shadow
Personnel shielding must be worn in the rare occasion during which the limited operator
may need to remain in the radiographic room during an exposure to assist the patient in
maintaining the proper position. What is the source of the greatest radiation hazard under
this circumstance? - ANSWER scattered radiation from the patient
What is the term for radiation that escapes from the x-ray tube housing? - ANSWER
leakage radiation
Why are limited operators prohibited from activities that result in direct exposure to the
primary x-ray beam? - ANSWER They are considered occupationally exposed individuals
Distance, as a method used to limit operator exposure, means that? - ANSWER The
operator should maximize the distance from the source during the exposure
2
Which of the following statements are correct regarding the link between radiation dose and
genetic effects? - ANSWER The link has been demonstrated in animal studies. Increased
risk to humans cannot be predicted with respect to an individual.
Which of the following changes in kilovoltage (kvp) will result in the greatest reduction of
patient dose, when miliampere-seconds (mas) is adjusted to compensate for the change? -
ANSWER increase kvp by 30%
Which radiographic imaging system uses storage phosphors to temporarily store energy
representing the image signal? - ANSWER computer radiography
What is the primary purpose of using gonad shields during radiography? - ANSWER
Reduce the likelihood of genetic effects.
Which of the following are types of gonad shields? - ANSWER Contact and shadow
When should gonad shielding be used? - ANSWER when the gonads are within 5 cm. Of
the radiation field.
The greatest cause of unnecessary radiation to patients that can be controlled by the limited
operator is: - ANSWER repeat exposure
The limited operator can reduce repeat exposures by : - ANSWER clearly instructing the
patients.
1
, How does the x-ray beam restriction minimize patient exposure - ANSWER It limits the
radiation field to the area of interest.
What is the device that allows the limited operator to vary the size of the radiation field? -
ANSWER collimator
How does filtration reduce patient exposure - ANSWER Removes longer-wavelength
photons
What is the National Council on Radiation Protection and Measurements (NCRP)
recommendation for the amount of total filtration? - ANSWER 2.5 mm Al equiv
What are the three principal methods used to protect limited operators from unnecessary
radiation exposure? - ANSWER Time, Distance, and Shielding
Which of the following is NOT a type of personnel radiation shielding? - ANSWER Shadow
Personnel shielding must be worn in the rare occasion during which the limited operator
may need to remain in the radiographic room during an exposure to assist the patient in
maintaining the proper position. What is the source of the greatest radiation hazard under
this circumstance? - ANSWER scattered radiation from the patient
What is the term for radiation that escapes from the x-ray tube housing? - ANSWER
leakage radiation
Why are limited operators prohibited from activities that result in direct exposure to the
primary x-ray beam? - ANSWER They are considered occupationally exposed individuals
Distance, as a method used to limit operator exposure, means that? - ANSWER The
operator should maximize the distance from the source during the exposure
2
