The CT found a nodule, and the PET will determine if the nodule is metabolically active or not, and if there are other areas in the body showing metabolic
activity.
Activity could be due to several reasons, including cancer and infection.
If metabolic activity is seen, then a CT guided FNAC or biopsy would be the next step.
However, as I mentioned, there is currently no evidence of cancer.
All the best, and God Bless!