2 doctors weighed in:

Plz explain pet/ct scan xrays and images..how it shows the tumor and metastasis in body ?

2 doctors weighed in
Dr. Michael Gabor
Diagnostic Radiology
1 doctor agrees

In brief: The substances used

in PET are radioactive tracers that accumulate to varying degrees in sites of metabolic activity.
Cancers typically have altered/increased metabolic activity relative to normal organs and tend to take up more of the tracer. The radioactivity is detected by the scanner and forms an image which lacks anatomic detail, so it is superimposed over a CT scan, which provides the necessary detail.

In brief: The substances used

in PET are radioactive tracers that accumulate to varying degrees in sites of metabolic activity.
Cancers typically have altered/increased metabolic activity relative to normal organs and tend to take up more of the tracer. The radioactivity is detected by the scanner and forms an image which lacks anatomic detail, so it is superimposed over a CT scan, which provides the necessary detail.
Dr. Michael Gabor
Dr. Michael Gabor
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