From what I've read and heard from our doctors at Dana Faber 3 months post TX is the standard for most of the top CC's although I had heard that this may change to a lomger period of time after TX to lessen the amount of false positives. Strangely enough our doctor told us the 3 months but we actually have scans booked for next week and it will only be 10 and a half weeks post TX. The NP booked them and said that the doctor okayed it but my fear is the same as yours...we'll see what happens. Good Luck...