Limited Scope of Radiography Practice
Exam UPDATED QUESTIONS AND
CORRECT ANSWERS
what statements are correct regarding the link between radiation and genetic effects -
CORRECT ANSWER The link has been demonstrated in animal studies .
Increased risk to humans cannot be predicted with respect to an individual.
The changes in kilovoltage (kVp) will result in the greatest reduction of patient dose, when
milliampere-seconds (mAs) is adjusted to compensate for the change - CORRECT
ANSWER Increase kVp by 30%
The following image receptor (IR) system speeds will result in the lowest patient dose -
CORRECT ANSWER Faster speed IR system
The primary purpose of using gonad shields - CORRECT ANSWER reduce the
likelihood of genetic effects
Are gonad shields - CORRECT ANSWER Contact and shadow
gonad shielding should be used - CORRECT 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 - CORRECT ANSWER repeat exposures
the limited operator can reduce repeat exposure - CORRECT ANSWER clearly
instructing patients
how does the x-ray beam restriction minimize patient exposure - CORRECT
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 -
CORRECT ANSWER collimator
how does filtration reduce patient exposure - CORRECT ANSWER removes longer-
wavelength photons
The National Council on Radiation Protection and Measurements(NCRP) recommendation
for the amount of total filtration - CORRECT ANSWER 2.5 mm Al equiv
Three principal methods used to protect limited operators from unnecessary radiation
exposure - CORRECT ANSWER time, distance, and shielding
The following is not a type of personal radiation shielding - CORRECT
ANSWER Shadow
personnel shielding must be worn on 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.? - CORRECT ANSWER scattered radiation from the patient
the term for radiation the escapes from the x-ray tube housing - CORRECT
ANSWER leakage radiation
why are limited operators prohibited from activities that result in direct exposure to the
primary x-ray beam - CORRECT ANSWER they are considered occupationally
exposed individuals
distance, as a method used to limit operator exposure, means that - CORRECT
ANSWER the operator should maximize the distance from the source during an
exposure
, shielding worn for personnel protection is designed to attenuate what source of exposure -
CORRECT ANSWER scatter radiation
the acronym for a common type of personnel dosimeter - CORRECT ANSWER TLD
What is the recommended placement for personnel dosimeter on the body of the limited
operator - CORRECT ANSWER the badge should be worn in the region of the collar
on the anterior surface of the body and outside the lead apron, if worn
The NCRP recommended annual effective dose limit for occupational exposure - CORRECT
ANSWER 5.0 rem (0.05 Sv)
The NCRP recommended monthly effective (or equivalent) dose limit to the fetus for a
pregnant worker - CORRECT ANSWER 0.05 rem (0.0005 Sv)
Radiation monitoring of personnel is required when what percentage of the annual
occupational effective dose limit is likely to be received - CORRECT ANSWER 10%
The conventional (British system) radiation unit to express radiation intensity in the air -
CORRECT ANSWER Roentgen
The conventional (British system) unit commonly used to report occupational dose to
radiation workers in the United States is the - CORRECT ANSWER rem
What is the conventional (British system) radiation unit of absorbed dose - CORRECT
ANSWER Rad
According to the Bergonie-Tribondeau law, the following types of cells are most
radiosensitive - CORRECT ANSWER embryonic tissue cells
Type of x-ray photon interaction with the body is primarily responsible for the radiation dose
absorbed by the patient - CORRECT ANSWER Photoelectric
Exam UPDATED QUESTIONS AND
CORRECT ANSWERS
what statements are correct regarding the link between radiation and genetic effects -
CORRECT ANSWER The link has been demonstrated in animal studies .
Increased risk to humans cannot be predicted with respect to an individual.
The changes in kilovoltage (kVp) will result in the greatest reduction of patient dose, when
milliampere-seconds (mAs) is adjusted to compensate for the change - CORRECT
ANSWER Increase kVp by 30%
The following image receptor (IR) system speeds will result in the lowest patient dose -
CORRECT ANSWER Faster speed IR system
The primary purpose of using gonad shields - CORRECT ANSWER reduce the
likelihood of genetic effects
Are gonad shields - CORRECT ANSWER Contact and shadow
gonad shielding should be used - CORRECT 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 - CORRECT ANSWER repeat exposures
the limited operator can reduce repeat exposure - CORRECT ANSWER clearly
instructing patients
how does the x-ray beam restriction minimize patient exposure - CORRECT
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 -
CORRECT ANSWER collimator
how does filtration reduce patient exposure - CORRECT ANSWER removes longer-
wavelength photons
The National Council on Radiation Protection and Measurements(NCRP) recommendation
for the amount of total filtration - CORRECT ANSWER 2.5 mm Al equiv
Three principal methods used to protect limited operators from unnecessary radiation
exposure - CORRECT ANSWER time, distance, and shielding
The following is not a type of personal radiation shielding - CORRECT
ANSWER Shadow
personnel shielding must be worn on 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.? - CORRECT ANSWER scattered radiation from the patient
the term for radiation the escapes from the x-ray tube housing - CORRECT
ANSWER leakage radiation
why are limited operators prohibited from activities that result in direct exposure to the
primary x-ray beam - CORRECT ANSWER they are considered occupationally
exposed individuals
distance, as a method used to limit operator exposure, means that - CORRECT
ANSWER the operator should maximize the distance from the source during an
exposure
, shielding worn for personnel protection is designed to attenuate what source of exposure -
CORRECT ANSWER scatter radiation
the acronym for a common type of personnel dosimeter - CORRECT ANSWER TLD
What is the recommended placement for personnel dosimeter on the body of the limited
operator - CORRECT ANSWER the badge should be worn in the region of the collar
on the anterior surface of the body and outside the lead apron, if worn
The NCRP recommended annual effective dose limit for occupational exposure - CORRECT
ANSWER 5.0 rem (0.05 Sv)
The NCRP recommended monthly effective (or equivalent) dose limit to the fetus for a
pregnant worker - CORRECT ANSWER 0.05 rem (0.0005 Sv)
Radiation monitoring of personnel is required when what percentage of the annual
occupational effective dose limit is likely to be received - CORRECT ANSWER 10%
The conventional (British system) radiation unit to express radiation intensity in the air -
CORRECT ANSWER Roentgen
The conventional (British system) unit commonly used to report occupational dose to
radiation workers in the United States is the - CORRECT ANSWER rem
What is the conventional (British system) radiation unit of absorbed dose - CORRECT
ANSWER Rad
According to the Bergonie-Tribondeau law, the following types of cells are most
radiosensitive - CORRECT ANSWER embryonic tissue cells
Type of x-ray photon interaction with the body is primarily responsible for the radiation dose
absorbed by the patient - CORRECT ANSWER Photoelectric
