We understand that people with cancer are worried about coronavirus. Here is the latest guidance. We will update it regularly.

Ask about radiotherapy

Do you have any questions about radiotherapy treatment? Ask our volunteer radiographer Kate and she'll aim to respond in 2 working days.


r mondo
Posted by

Do you have to wait 3 months after you finished treatment before any scan can be done?

Lung cancer radio.

Kate C - Macmillan
Posted by


Thank you for your query. 

When you have a follow up scan will often depend on the treatment that you've had.  If you have had a long course of radiotherapy, the treatment causes  a lot of inflammation in the treatment area so it is usual to leave enough time for that inflammation to settle before doing another scan.  If a scan is done too soon, the pictures aren't clear, and things may look worse than they actually are. Therefore it is quite normal to have to wait 3-4 months after radiotherapy before having another scan.   If you have just had chemotherapy or a short course of radiotherapy, the scan may be sooner depending on when the oncologist has decided they want to see you.

I hope that has answered your question sufficiently. 

Best wishes, 


Remember you can also speak with the Macmillan Support Line team of experts. Phone free on 0808 808 0000 (7 days a week, 8am-8pm) or by email.