20 Questions
What is the principle of dose limitation?
To prevent stochastic effects completely
Who recommends the dose limits for radiation exposure?
The International Commission on Radiological Protection
What does occupational exposure refer to?
Exposure incurred by workers during their work, except for medical exposure and natural background radiation
What happens if radiation workers exceed the annual dose limits?
They will be prevented from continuing in their occupations for the rest of the year
What is one consideration to protect the patient during dental x-rays?
Using lead aprons and thyroid collars
What is one consideration to protect the operator during dental x-rays?
Standing outside the x-ray room during exposure
What should the primary beam be directed to during dental x-rays?
The patient
What is recommended for periapical and bitewing radiographs to align the film precisely with the collimated beam?
Using film holders that align the film precisely with the collimated beam
What type of screens should be used in panoramic x-rays to protect patients from unnecessary radiation exposure?
"rare-earth screens"
What should be used in extraoral films to minimize patient exposure?
Intensifying screens
How should the operator stand in relation to the patient during dental x-ray exposure?
At least 6 feet (2 m) from the patient, at an angle of 90 to 135 degrees to the central ray of the x-ray beam.
What is used to decrease scattering radiation during dental x-rays?
Increase source to skin distance
What is the purpose of the radiation protection standard settings defined by the International Commission on Radiological Protection (ICRP)?
To prevent the occurrence of deterministic effects of radiation
What are deterministic effects of radiation?
Health effects with increasing severity as the dose increases
How do stochastic effects of ionizing radiation occur?
By chance, generally occurring without a threshold level of dose
What is the principle of 'justification' in radiation protection?
To ensure radiation benefits outweigh risks
What is the principle of 'optimization' in radiation protection?
To keep radiation exposure as low as reasonably achievable (ALARA)
What is the principle of 'dose limitation' in radiation protection?
To keep exposure within prescribed dose limits
Which type of health effect is related directly to the absorbed radiation dose?
Deterministic effects
What is the relationship between the severity of stochastic effects and the dose received?
Severity is independent of the dose received
Test your knowledge of radiation protection and its impact on health with this quiz. Topics covered include the purpose of radiation protection standard settings, deterministic effects, and stochastic effects.
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