Question 1

How much radiation from an X-ray?

Accepted Answer

Chest X-ray: 0.1 mSv. Dental: 0.005 mSv. Mammogram: 0.4 mSv. Much less than CT scans.

Question 2

Are X-rays safe?

Accepted Answer

Individual X-rays are very low dose. Medical benefits typically far outweigh minimal risks.

Question 3

What's the difference between exposure and dose?

Accepted Answer

Exposure (roentgen) measures radiation in air. Absorbed dose (gray/rad) measures energy deposited. Equivalent dose (sievert/rem) accounts for biological effect.

Question 4

What are safe radiation levels?

Accepted Answer

Background radiation: ~3 mSv/year. Occupational limit: 50 mSv/year. Single dose effects start around 250 mSv. Always follow ALARA principle.

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