Brain: normal variations and benign findings in fluorodeoxyglucose-PET/computed tomography imaging

Area of Science:

• Neuroimaging
• Nuclear Medicine
• Cerebral Metabolism

Background:

• 18F-fluorodeoxyglucose (18F-FDG) PET measures brain glucose metabolism, reflecting neuronal activity.
• It's used to detect metabolic changes in neurological diseases compared to normal aging.
• Healthy aging shows variations in 18F-FDG distribution.

Purpose of the Study:

• To review 18F-FDG-PET findings in normal brain aging.
• To analyze metabolic differences related to aging and gender.
• To discuss influencing factors and artifacts in 18F-FDG-PET studies.

Main Methods:

• Review of existing literature on 18F-FDG-PET in normal brain aging.
• Analysis of studies focusing on age- and gender-related metabolic variations.
• Inclusion of data on substance, medication, and therapy effects.

Main Results:

• Normal aging exhibits specific patterns of cerebral glucose metabolism.
• Significant metabolic differences are observed between genders with aging.
• Substances, medications, and artifacts can alter 18F-FDG distribution.

Conclusions:

• 18F-FDG-PET is valuable for understanding normal brain aging metabolism.
• Age and gender are key factors influencing brain metabolism in healthy individuals.
• Awareness of confounding factors is crucial for accurate interpretation of 18F-FDG-PET scans.