Radiation Protection in Medical
Radiography - Radiation Protection
UPDATED ACTUAL Questions and
CORRECT Answers
Three types of scatter - CORRECT ANSWER -primary
scatter
leakage
Define primary scatter emerges directly from the x ray tube collimator - CORRECT
ANSWER -primary scatter
Define leakage scatter does not emerge directly from the collimator opening, penetrates though
the x-ray tube housing walls - CORRECT ANSWER -leakage scatter
whenever a diagnostic x-ray beam passes through matter - CORRECT ANSWER -scatter
What is the most hazardous and most difficult to shield from - CORRECT ANSWER -
primary
What are techs most likely to be exposed to - CORRECT ANSWER -scatter
When is leakage radiation on - CORRECT ANSWER -only when the x-ray beam is one
Leakage radiation must not exceed - CORRECT ANSWER -1 mGy/hr at a distance of 1 m
1 mR/hr at a distance of 1 m
What type of metal is used for the protective tube housing - CORRECT ANSWER -lead
, What does the protective tube housing protect who from what - CORRECT ANSWER -
radiographers and pt. from off focus or leakage radiation by restricting the emission of x-rays to
the primary beam
and electric shock
Is scatter radiation strong or weak energy - CORRECT ANSWER -weak energy
What is a major source of scatter radiation - CORRECT ANSWER -the patient
scatter interaction takes place with what shell electron - CORRECT ANSWER -outer
intensity of scatter 1 m from the patient is ______% of the intensity of the useful beam at the
patient - CORRECT ANSWER -0.1%
techs receive the least amount of radiation from what type of scatter - CORRECT
ANSWER -standing at a right angle
techs receive the most amount of radiation from what type of scatter - CORRECT
ANSWER -backscatter
most occupational dose comes from what 2 areas - CORRECT ANSWER -fluoro and
mobile
what does ALARA stand for - CORRECT ANSWER -As Low As Reasonably Achievable
The probability of injury, illness, or death resulting from an activity that takes place in the
workplace - CORRECT ANSWER -occupational risk
what is an example of radiology occupational risk - CORRECT ANSWER -cancer
Radiography - Radiation Protection
UPDATED ACTUAL Questions and
CORRECT Answers
Three types of scatter - CORRECT ANSWER -primary
scatter
leakage
Define primary scatter emerges directly from the x ray tube collimator - CORRECT
ANSWER -primary scatter
Define leakage scatter does not emerge directly from the collimator opening, penetrates though
the x-ray tube housing walls - CORRECT ANSWER -leakage scatter
whenever a diagnostic x-ray beam passes through matter - CORRECT ANSWER -scatter
What is the most hazardous and most difficult to shield from - CORRECT ANSWER -
primary
What are techs most likely to be exposed to - CORRECT ANSWER -scatter
When is leakage radiation on - CORRECT ANSWER -only when the x-ray beam is one
Leakage radiation must not exceed - CORRECT ANSWER -1 mGy/hr at a distance of 1 m
1 mR/hr at a distance of 1 m
What type of metal is used for the protective tube housing - CORRECT ANSWER -lead
, What does the protective tube housing protect who from what - CORRECT ANSWER -
radiographers and pt. from off focus or leakage radiation by restricting the emission of x-rays to
the primary beam
and electric shock
Is scatter radiation strong or weak energy - CORRECT ANSWER -weak energy
What is a major source of scatter radiation - CORRECT ANSWER -the patient
scatter interaction takes place with what shell electron - CORRECT ANSWER -outer
intensity of scatter 1 m from the patient is ______% of the intensity of the useful beam at the
patient - CORRECT ANSWER -0.1%
techs receive the least amount of radiation from what type of scatter - CORRECT
ANSWER -standing at a right angle
techs receive the most amount of radiation from what type of scatter - CORRECT
ANSWER -backscatter
most occupational dose comes from what 2 areas - CORRECT ANSWER -fluoro and
mobile
what does ALARA stand for - CORRECT ANSWER -As Low As Reasonably Achievable
The probability of injury, illness, or death resulting from an activity that takes place in the
workplace - CORRECT ANSWER -occupational risk
what is an example of radiology occupational risk - CORRECT ANSWER -cancer
