The 'scanxiety' is always horrible, particularly on your 1st anniversary, @Jo_H - we've all pretty well felt it.
Great tips from the ladies ..... whilst they are never comfortable - they should be more discomfort than painful. Hopefully you get the 'newer 3D machine' (and not the ones used in the mobile buses, which are older.)
Try not to overthink it ..... maybe take a puzzle book or a good magazine with you, so you are 'busy' in the waiting room ....
Also, check out these 'tick sheets' for you to fill in afterwards (as much for your OWN well being as being helpful for your Surgeon/Onc etc.) You'll be seeing your surgeon & onc some time soon to go over your MG results ..... and these are easy ways of keeping track of who you've seen when, how you are feeling both mentally & physically, or mention specific pain issues that you want to raise (as mentioned in your original post.) If you don't have it written down and put on the desk, it is easy to forget to mention it during the appointment - and you always remember them when half way home!
(Just make sure you click on the links at the BOTTOM of the post, not the pics.)
https://onlinenetwork.bcna.org.au/discussion/21973/questions-to-ask-post-surgery-of-yourself-to-your-specialists-tick-sheets-self-assessment#latestAll the best - I hope you'll be fine xx