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Oops. I forgot some things relating to PET scans.

Posted by SLS on December 11, 2022, at 16:21:38

In reply to Performing your drug trials - More suggestions., posted by SLS on December 11, 2022, at 9:56:20



I forgot to explain completely how the use of FDG (flourodeoxyglucose) liberates gamma-rays.

PET = Positron Emission Tomography

The two particles that are liberated upon the cell's metabolizing a FDG molecule instead of a normal glucose molecule are:

1. Electrons = Matter

2. Positrons = Antimatter (Positively charged electrons)

When these two particles collide, both are annihilated. They are converted into pure energy, in this case, in the form of gamma-rays. The rays are detected, measured, and rendered as an image.



1. A typical rendering of comparative PET scans in depression:

2. Fluordeoxyglucose (FDG)


PET scans are not limited to using FDG. There are a plethora of other radio-labelled substances used for imaging various biological processes.


- Scott

Some see things as they are and ask why.
I dream of things that never were and ask why not.

The only thing necessary for the triumph of evil is that good men do nothing.




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