Hi Chris, there have been a few blogs about this subject and I totally agree with you that a scan would put our minds at rest.
My Oncologist recommends I have a yearly mammogram/ultrasound and chest X-Ray.
I am now on 6 monthly Onco visits, and he does blood tests to check Ca 24, Vitamin D, Liver function and Kidney function and a full blood count.
You can always go to your GP and request these blood tests, I am currently awaiting iodine test because a Natropath recommended it. As well as a couple of other tests that another lady on her recommended.
Viv