After treatment, it is important to know if any active cancer cells remain
in the body. In the past, the amount and type of chemotherapy that is used,
as well as the area treated by the radiation beams in radiation therapy, was
according to standard rules. PET allows the type and amount of therapy to be
directed specifically to you, the patient, and the location, extent, and resilience
of your type of cancer.
PET can be used to image lung tumor response to therapy and to detect recurrence
in successfully treated lesions.
If the cancer cells have been
killed by the treatment, they will not absorb any of the radioactive glucose given in
the PET scan. After treatment, although the tumor masses may still be present and seen
on CT scans, the cells may no longer be alive-which can be shown by PET. Conversely, if
the cancer cells have come back either in lymph nodes or scar tissue from surgery or another
lesion, PET can see the accumulation of the radioactive glucose much sooner than a CT scan-treatment
can be re-started sooner and this can improve your chance of beating this disease.
Call the doctors at the PET centers nearest you
if you have lung cancer and would like to discuss whether PET could be useful in your care.