COVID-19: CT scans and mammograms – vaccine advice

Get advice about getting a CT scan or mammogram after your COVID-19 vaccination.

Last updated: 16 June 2021

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Getting a CT scan

If you’re going for a CT scan after you get the COVID-19 vaccine, it’s important to let the radiographer and your doctor know that you’ve recently been vaccinated.

The vaccine can occasionally cause the lymph nodes in your armpit or neck to swell for a few days. This may be seen on CT scans, including those that are used to diagnose and monitor cancers.

If you can, plan to get your COVID-19 vaccine at least 2 weeks before your scan or as soon as you can afterwards. Don’t delay your scan.

Vaccine advice if you're receiving cancer treatment


Getting a breast screen (mammogram)

If you’re going for breast screening (mammogram or ultrasound) after you get the COVID-19 vaccine, let the radiographer know you’ve recently been vaccinated.

The vaccine can occasionally cause the lymph nodes in your armpit or neck to swell for a few days. This may be seen on the mammogram or ultrasound for up to a few weeks.

Don’t delay your vaccine, or your mammogram or ultrasound.

Vaccine advice if you're receiving cancer treatment

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