1 (edited by PCL1029 Sun, 24 Nov 2013 10:40:07)

Topic: PET Scan for Hepatic Mass (cholangiocarcinoma)

Hi, everyone,

The link below (under the cholangiocarcinoma section-sometimes helpful) will help you to understand a bit about the cut off points of SUVmax Value.

http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3059121/

God bless.

Please know that my personal opinion is not intended nor implied to be a substitute for professional medical advice. If  provided, information are for educational purposes.Consult doctor is a MUST for changing of treatment plans.

Re: PET Scan for Hepatic Mass (cholangiocarcinoma)

Thanks for that Percy, very useful.

Any advice or comments I give are based on personal experiences and knowledge and are my opinions only, they are not to be substituted for professional medical advice. Please seek professional advice from a qualified doctor or medical professional.

Re: PET Scan for Hepatic Mass (cholangiocarcinoma)

Hi all, could anyway elaborate on the SUV a little more for me?  I tried to read but have a hard time comprehending what is means at the cut off points.  I went back to my pet scan and it shows suv of 4.5.

Hope, love, strength...2013 and for the years to come, Porter.

4 (edited by PCL1029 Sun, 24 Nov 2013 17:05:17)

Re: PET Scan for Hepatic Mass (cholangiocarcinoma)

Hi, Porter,

The cut off points of 2.5-3.5 means that:

if your SUVmax>3.5 you MAY have tumor activity within that tumor.(positive)
if your SUVmax is 2.5-3.5 ,you may or may not have any meaningful tumor activity even the "hot spots" light up on the PET scan.  (stable)
if your SUVmax<2.5, the possibility of having  active tumor is less.  (negative)
However, the above values and judgement by the radiologist depends on comparing the overall uptake of the radioactive glucose of the tumor in the liver to the blood pool around the lungs, or other point of reference chosed by him/her for that single PET scan.
The SUVmax value also depending on your  height weight at time of the scan as well as the dose given by the radiology technician  and the waiting time (usually 60 min.) between the injection and the start of the scan; the breathing (movement of the chest)of the patient also may be one of the factor that can affect the value.
BTW, inflammation caused by infection will also cause false-positive results of the SUVmax value.

But the most usefullness of PET scan is to compare YOUR most current one to the one YOU had taken before(ie: every 3 or 6 month etc.).That is  in that series of comparing scans that will provide you the best answer of your disease progress.
so even you had a SUVmax value of 4.6 from your July 27 message . that value should be compared with your most current PET to see whether your chemotherapy is working or not.
According to the radiologist I talked to,the SUVmax value is relative and not absolute .
I hope the above can help a little in understanding about PET scan.

God bless.

Please know that my personal opinion is not intended nor implied to be a substitute for professional medical advice. If  provided, information are for educational purposes.Consult doctor is a MUST for changing of treatment plans.

Re: PET Scan for Hepatic Mass (cholangiocarcinoma)

Yes thank you so much as you put it in people terms for me smile  I haven't had a pet scan since, just MRI. And I also have multiple SUV numbers which in different segments if that makes sense...

Hope, love, strength...2013 and for the years to come, Porter.

Re: PET Scan for Hepatic Mass (cholangiocarcinoma)

Hi,
having multiple SUVmax value  that means you may have more than one tumor that show tumor activity(metabolism) .
God bless.

Please know that my personal opinion is not intended nor implied to be a substitute for professional medical advice. If  provided, information are for educational purposes.Consult doctor is a MUST for changing of treatment plans.