Pet Scans.

Good morning everyone,probably noone has looked at my profile.

My surgery was a long time ago 1995,  i am not in the clear,i wonder if someone can enlighten me as to what a PET scan entails.Ihave had several MRI and CT scans but havent  come accross PET scan,only what i have seen

on the  Macmillan pages. I hope everybody makes the best of Christmas.Although a lot of people wont feel like it.