# Radiation Doses

## Radiation Doses

### Briefing

A dose of radiation is like a sunburn; its severity depends on the intensity of the source and the amount of time a person is exposed.

A dose is measured in millisieverts (mSv). It is a measure of how radiation is absorbed by the human body.

To keep things simple, we use the abbreviation mSv instead of millisieverts, just like km/h stands in for kilometres per hour.

## Radiation Doses

### Briefing

These amounts can be vastly different, so it helps to look at them as boxes of radiation dose. The bigger the box, the more radiation it holds.

Here's a way to see how doses are related. The dose from a single x-ray is 200 times smaller than the annual public dose limit for a Canadian, or 20,000 times smaller than the smallest amount known to cause cancer.

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