Positron emission tomography of the brain

Area of Science:

• Nuclear medicine
• Medical imaging
• Radiochemistry

Background:

• Positron emission tomography (PET) is a functional imaging technique.
• It detects photons from positron-electron annihilation to map isotope distribution.
• PET enables quantitative measurement of radionuclide distribution linked to biological function.

Purpose of the Study:

• To review the applications of PET in various clinical disorders and normal aging.
• To highlight PET's role in assessing local tissue distribution and function.

Main Methods:

• Utilizes positron-emitting isotopes attached to functional compounds.
• Reconstructs isotope distribution via detected annihilation photons.
• Employs methods like the deoxyglucose method for glucose metabolism measurement.

Main Results:

• PET is widely used for measuring local cerebral glucose metabolism.
• The technique is applicable to diverse conditions including dementia, brain tumors, psychiatric diseases, epilepsy, movement disorders, and stroke.
• PET can also assess normal aging processes.

Conclusions:

• PET is a versatile tool for quantitative functional imaging in neurology and psychiatry.
• Its applications span a broad range of neurological and psychiatric disorders.
• PET provides valuable insights into both pathological and normal brain states.