What is a primary use of PET scans in clinical practice?

• A. To perform surgery on damaged brain tissues
• B. To investigate areas of the brain not functioning normally
• C. To monitor blood flow during physical activity
• D. To assess psychological conditions through emotional responses

Answer: (B)

Positron Emission Tomography (PET) scans are primarily used in clinical practice to investigate areas of the brain that are not functioning normally. This imaging technique allows medical professionals to visualize metabolic processes within the brain by detecting radioactive tracers that are injected into the bloodstream. These tracers highlight areas of high metabolic activity, which often correspond to regions of the brain that may be abnormally functioning due to various conditions such as tumors, dementia, or other neurological disorders.

By identifying regions of abnormal activity, healthcare providers can gain valuable insights into the underlying causes of various symptoms and conditions, making PET scans an essential tool for diagnosing and monitoring brain health. This capability to investigate brain function makes PET scans particularly useful in the context of neurological disorders, where changes in brain metabolism can indicate dysfunction long before structural changes might be evident through other imaging modalities, such as MRI or CT scans.