LIMITED SCOPE OF RADIOGRAPHY PRACTICE EXAM
(RADIOGRAPHY ESSENTIALS FOR LIMITED PRACTICE
FOURTH EDITION) UPDATED 2025/26 QUESTIONS
WITH COMPLETE SOLUTIONS.
what statements are correct regarding the link between radiation and genetic
effects 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 Answer - Increase kVp by 30%
The following image receptor (IR) system speeds will result in the lowest
patient dose Answer - Faster speed IR system
The primary purpose of using gonad shields Answer - reduce the likelihood of
genetic effects
Are gonad shields Answer - Contact and shadow
gonad shielding should 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 exposures
the limited operator can reduce repeat exposure Answer - clearly instructing
patients
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
The National Council on Radiation Protection and Measurements(NCRP)
recommendation for the amount of total filtration Answer - 2.5 mm Al equiv
Three principal methods used to protect limited operators from unnecessary
radiation exposure Answer - time, distance, and shielding
The following is not a type of personal radiation shielding 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.? Answer -
scattered radiation from the patient
, the term for radiation the 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 an exposure
shielding worn for personnel protection is designed to attenuate what source
of exposure Answer - scatter radiation
the acronym for a common type of personnel dosimeter Answer - TLD
What is the recommended placement for personnel dosimeter on the body of
the limited operator 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
Answer - 5.0 rem (0.05 Sv)
The NCRP recommended monthly effective (or equivalent) dose limit to the
fetus for a pregnant worker 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 Answer - 10%
The conventional (British system) radiation unit to express radiation intensity in
the air Answer - Roentgen
(RADIOGRAPHY ESSENTIALS FOR LIMITED PRACTICE
FOURTH EDITION) UPDATED 2025/26 QUESTIONS
WITH COMPLETE SOLUTIONS.
what statements are correct regarding the link between radiation and genetic
effects 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 Answer - Increase kVp by 30%
The following image receptor (IR) system speeds will result in the lowest
patient dose Answer - Faster speed IR system
The primary purpose of using gonad shields Answer - reduce the likelihood of
genetic effects
Are gonad shields Answer - Contact and shadow
gonad shielding should 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 exposures
the limited operator can reduce repeat exposure Answer - clearly instructing
patients
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
The National Council on Radiation Protection and Measurements(NCRP)
recommendation for the amount of total filtration Answer - 2.5 mm Al equiv
Three principal methods used to protect limited operators from unnecessary
radiation exposure Answer - time, distance, and shielding
The following is not a type of personal radiation shielding 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.? Answer -
scattered radiation from the patient
, the term for radiation the 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 an exposure
shielding worn for personnel protection is designed to attenuate what source
of exposure Answer - scatter radiation
the acronym for a common type of personnel dosimeter Answer - TLD
What is the recommended placement for personnel dosimeter on the body of
the limited operator 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
Answer - 5.0 rem (0.05 Sv)
The NCRP recommended monthly effective (or equivalent) dose limit to the
fetus for a pregnant worker 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 Answer - 10%
The conventional (British system) radiation unit to express radiation intensity in
the air Answer - Roentgen
