I need to know What is the difference between PET and PET/CT? Is it better to get the PET/CT?
James Metz, MD, OncoLink Editor-in-Cheif, responds:
A PET scan (positron emission tomography) looks at the biologic activity of a tumor, not the shape and size of a tumor. A CT scan give anatomic information like exact location, size, and shape of a tumor with its relationship to other structures. Most times, we now go with a combined PET/CT scan so that we obtain both the biologic activity overlayed with the anatomic structure. This gives us more information. Most institutions have moved to combined PET/CT to get the best information.
This question and answer was part of the OncoLink Brown Bag Chat Series. View the entire Interpreting Test Results transcript.
May 14, 2014 - The use of positron emission tomography combined with computed tomography (PET-CT) compared with CT rarely impacts surgical management for patients with potentially resectable hepatic metastases of colorectal adenocarcinoma, according to a study published in the May 14 issue of the Journal of the American Medical Association.
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