PET Scan – Positron Emission Tomography

A PET scan is an advanced imaging test that helps doctors visualize how organs and tissues are functioning in real time. Unlike CT or MRI, which show structure, PET scans reveal metabolic activity, making them especially useful for detecting abnormalities at the cellular level.

🔍 What It Detects

• Cancer: Identifies tumors, monitors spread (metastasis), and evaluates treatment response

• Brain Disorders: Detects Alzheimer’s, epilepsy, Parkinson’s, and brain tumors

• Heart Disease: Assesses blood flow, detects damaged heart tissue, and evaluates viability before surgery

🧪 How It Works

• A small amount of radioactive tracer is injected into the bloodstream

• The tracer travels to targeted organs and emits signals

• A special camera captures these signals to create detailed images of metabolic activity

⏱️ Duration & Preparation

• Takes about 30–90 minutes

• Requires fasting for 4–6 hours

• May involve avoiding strenuous activity or certain medications before the test

💡 Why It’s Valuable

• Detects disease earlier than structural scans

• Helps differentiate between benign and malignant growths

• Guides treatment planning and surgical decisions