Hi Kellyrosie, I am so sorry you are going through this.
My dad was diagnosed in early 2019. I think he may have had one PET scan at the outset but his current care team doesn’t use them- at MD Anderson. They have told us that the CT scan is the gold standard.
I agree with Hannaha– getting a specialist you trust and getting genomic testing is key. My dad has been on the same targeted drug- Tibsovo- for just over 2 years. Don’t give up hope! And please do keep asking us questions here (or in the Facebook groups if you decide to join there).
Take good care,
Laura