What percentage of FDG uptake is observed in the brain?

Fluorodeoxyglucose (FDG) is a radiopharmaceutical commonly used in Positron Emission Tomography (PET) for imaging metabolic activity. The brain is a significant consumer of glucose due to its high metabolic demand, which is reflected in FDG uptake.

In typical PET scans, the standard percentage of FDG uptake observed in the brain is around 6%. This value is consistent across various studies and is important for interpreting scans in clinical settings, particularly in differentiating between normal brain activity and pathological conditions such as tumors or neurodegenerative diseases. Understanding this average helps radiologists and nuclear medicine professionals assess the extent of FDG distribution in the brain, which can signify normal physiological activity or potential abnormalities.

Hence, the specified value of 6% accurately represents the standard uptake seen in the brain during FDG PET imaging, making it the correct choice in this context.