Medical Radiation Dose Calculator
Health & FitnessCompare the radiation dose from common medical imaging procedures to natural background radiation exposure.
Total Effective Dose
The total effective radiation dose from this many procedures, in millisieverts.
Percent of Annual Background Radiation
3
This dose as a percentage of the average annual natural background radiation exposure, about 3.1 mSv per year.
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Frequently Asked Questions
How much radiation do we get from natural background sources?
The average person receives about 3 to 3.1 millisieverts (mSv) per year from natural background radiation, including cosmic rays, radon gas, and radiation from the earth itself.
How do medical procedure doses compare to this?
A single chest X-ray delivers about 0.1 mSv, roughly 12 days worth of natural background radiation, while a CT scan of the abdomen delivers about 10 mSv, more than 3 years worth.
Are these doses dangerous?
Individual diagnostic imaging doses are generally considered low risk, and the benefit of an accurate diagnosis typically outweighs the small radiation exposure. Cumulative exposure from many procedures over time is what doctors monitor most carefully.
Do these values apply to every patient exactly the same way?
These are typical reference values. Actual dose can vary based on patient size, the specific imaging equipment used, and the exact protocol followed.
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