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CAT/PET/MRI what is the difference

Posts: 26
Joined: Jun 2010


I am just wondering my brother has signet ring cell cancer in the stomach. A cat scan was done and it showed nothing in the other organs. Now they want to do a PET & MRI if it didn't show up in the CAT scan could it show up in the PET/ MRI. What is the difference of these tests.



Tina Blondek's picture
Tina Blondek
Posts: 1566
Joined: Nov 2009

Hi Ellen
I know that a PET scan will show the most detail of all the scans. An MRI will show mostly the muscle tissue. My thought is that a PET scan is the way to go. Best of luck. Prayers to you and your brother/

Posts: 7
Joined: Jul 2010

Ellen -

PET -- Positron Emission Tomography -

Check out this link -- good information on your question


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