Positron Emission Tomography (PET) is an advanced imaging technique that helps doctors see how organs and tissues are functioning inside the body. Unlike standard X-rays or CT scans that show structure, a PET scan reveals activity, metabolism, and molecular changes, making it extremely valuable for early disease detection.
How PET Works
A PET scan uses a small amount of a radioactive tracer, usually attached to glucose or another molecule. Once injected into the body, this tracer travels to areas with high metabolic activity. A special scanner then detects the tracer and creates detailed, 3D images.
What PET Scans Are Used For
1. Cancer Detection & Monitoring
Identifies tumors
Detects cancer spread
Monitors treatment response
Cancer cells absorb more tracer because they grow faster.
2. Brain Disorders
PET helps diagnose conditions like:
Alzheimer’s disease
Epilepsy
Parkinson’s disease
Brain tumors