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Questions and Answers
What is the average annual dose of natural background radiation exposure?
What is the average annual dose of natural background radiation exposure?
- 2.4 mSv (correct)
- 1.5 mSv
- 4.5 mSv
- 3.0 mSv
What is a source of terrestrial external radiation exposure?
What is a source of terrestrial external radiation exposure?
- Cosmic rays from outer space (correct)
- Radon gas in the air
- Fallout from nuclear weapons
- Radiation therapy
Which of the following is an example of internal exposure to radionuclides?
Which of the following is an example of internal exposure to radionuclides?
- Inhalation of radon gas (correct)
- Computed tomography (CT) imaging
- Luminous wristwatches
- Radiation therapy
What principle guides the doses from Oral-maxillofacial imaging?
What principle guides the doses from Oral-maxillofacial imaging?
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What is the greatest contributor to human-made radiation exposure?
What is the greatest contributor to human-made radiation exposure?
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Study Notes
Radiation Exposure
- The average annual dose of natural background radiation exposure is approximately 2.4 mSv ( millisievert).
Terrestrial External Radiation Exposure
- One source of terrestrial external radiation exposure is radon in the soil.
Internal Exposure to Radionuclides
- An example of internal exposure to radionuclides is the consumption of food and water contaminated with radioactive substances.
Principle Guiding Doses from Oral-maxillofacial Imaging
- The ALARA principle (As Low As Reasonably Achievable) guides the doses from Oral-maxillofacial imaging.
Human-made Radiation Exposure
- The greatest contributor to human-made radiation exposure is medical imaging, particularly CT scans.
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