Are CT scans safe?

CT scans are quick, painless and generally safe. However, there's a small risk you could have an allergic reaction to the contrast dye used and you will be exposed to X-ray radiation.

The amount of radiation you're exposed to during a CT scan varies, depending on how much of your body is scanned. CT scanners are designed to make sure you're not exposed to unnecessarily high levels.

Generally, the amount of radiation you're exposed to during each scan is the equivalent to between a few months and a few years of exposure to natural radiation from the environment.

It's thought exposure to radiation during CT scans could slightly increase your chances of developing cancer many years later, although this risk is thought to be very small (less than 1 in 2,000). 

The benefits and risks of having a CT scan will always be weighed up before it's recommended. Talk to your doctor or radiographer about the potential risks beforehand, if you have any concerns.

Content supplied by the NHS Website

Medically Reviewed by a doctor on 21 Dec 2018