Anyone had a PET (or CT/PET) diagnostic scan after chemotherapy, rather than an MRI?

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Hello all - has anyone had a PET (or CT/PET) diagnostic scan after chemotherapy (after rectal cancer surgery in my case) rather than an MRI?  I can't have MRI scans due to a particular type of metal ear implant, so I'd appreciate views as to whether the PET scan is a good alternative.   I plan to ask my oncologist at my next appointment but any views here would be helpful.  I am nearing the end of a 3 month round of 'curative chemotherapy' after surgery to remove the tumour, so the next step will be to see if the treatment has worked.   Thank you. 

  • Hi  ,

    A PET scan is useful for spotting any fast growing cells as I understand it.  I have had a PET scan after chemo but it was inconclusive which I think meant they couldn't spot any areas of cancerous cells but couldn't be definite they'd all gone.

    Best wishes

    Cerys

  • Hi  I’ve never had a PET scan and my only MRI was to check my liver when first diagnosed. All my scans have been CT since then x

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  • My only MRI was part of the original diagnosis for bowel cancer.All my follow ups were CT scans

    Kath

  • Thanks for your reply Karen.

  • My mum had lots of PET scans as she was a stage 4 patient . It has a different method of uptake so very good at adding more information for the drs .

    It would generally be the go to if they needed to clarify some other image . 
    Certainly would not be concerned as I think it gives a lot of information and surgeons actually quiet often ask for them when preparing for surgery too .

    Take care ,

    Court 

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  • Hi Bridget,

    I have stage IV - I regularly have CT, MRI and PET. While MRI & CT show structure, PET gives information about metabolic activity....cancer cells use more energy than normal cells, so area will 'flare' on a PET scan. Occasionally it is slightly tricky to interepret, because areas of inflammation also shows as a 'flare', so radiologist will comment accordingly. I have however had many PETs over the last 6 years, only once was it inconclusive (due to suspected inflammation in my pelvis). 

    Interestingly, my last recurence did not show on CT or MRI, the PET however showed a suspicious 'flare'. So they then went and did a colonocopy and found the trouble. Bottomline - PET is a good scan, I don't think you should be worried. And bonus the actual scan time is shorter than MRI. Good luck - hope its all good news! 

  • Thank you so much for your comprehensive answer Babotie - v helpful and much appreciated. 

  • Thank you Court, for your helpful reply, which is much appreciated - and all adds to my knowledge.  Kind regards - Bridget