Health Effects and Radiation Exposure

What is the approximate radiation dose received from eating one banana?

• 0.05 µSv

• 0.09 µSv

• 0.1 µSv

• 0.3 µSv

What is the approximate radiation dose received from a dental X-ray?

• 1 µSv

• 5 µSv

• 10 µSv

• 40 µSv

What is the approximate normal background radiation dose an average person receives per day?

• 1 µSv

• 5 µSv

• 10 µSv

• 40 µSv

What is the approximate radiation dose from a Head CT Scan?

• 400 µSv

• 1 mSv

• 2 mSv

• 250 µSv

Which of the following radiation exposures is generally larger than a mammogram (400 µSv) or a head CT scan (2 mSv)?

• Yearly dose from natural potassium in the body (390 µSv)

• EPA yearly limit on radiation exposure to a single member of the public (1 mSv)

• Maximum external dose from Three Mile Island accident (1 mSv)

• Normal yearly background dose (approximately 4 mSv)

How does the radiation dose from spending an hour on the grounds at the Chernobyl plant in 2010 (6 mSv in one spot) compare to a chest CT scan (7 mSv)?

• The Chernobyl dose is significantly higher.

• The chest CT scan dose is significantly higher.

• They are comparable.

• The Chernobyl dose is negligible compared to the chest CT scan.

What is the maximum yearly radiation dose permitted for a US radiation worker?

• 1 mSv

• 10 mSv

• 50 mSv

• 100 mSv

At what radiation dose level are the first detectable changes in blood observed?

• 1 Rem

• 5 Rem

• 10 Rem

• 50 Rem

What defines an "excess death" in the context of radiation exposure?

• A death that occurs due to natural causes at an advanced age.

• Any death caused by cancer, regardless of its origin.

• A death that would not have occurred if not for the radiation exposure.

• A death that is part of the statistically expected mortality rate.

What does the linear hypothesis of radiation exposure suggest?

• There is a safe threshold below which radiation causes no harm.

• Any amount of radiation dose, no matter how small, can cause excess deaths.

• Radiation exposure only causes harm above a certain dose.

• The effect of radiation on health is non-linear.