Ash Udgata Writes Group

Introduction

Positron Emission Tomography (PET) Nuclear Medicine is an advanced medical imaging technique that allows clinicians to visualize and measure metabolic and biochemical activity within the body. Unlike traditional imaging modalities such as CT or MRI, which focus on structural details, PET scans provide functional information—helping detect diseases at the molecular level, often before anatomical changes occur.

PET imaging is widely used in oncology, cardiology, and neurology, providing critical insights into cancer detection, brain disorders, and heart diseases. It plays a central role in precision medicine, enabling personalized diagnosis, treatment planning, and monitoring of therapeutic response.

Working Principle

PET imaging involves the use of radiopharmaceuticals—radioactive tracers labeled with positron-emitting isotopes such as Fluorine-18 (¹⁸F), Carbon-11 (¹¹C), Nitrogen-13 (¹³N), or Oxygen-15 (¹⁵O).

The process includes:

1. Tracer Injection – A small amount of radiopharmaceutical is injected into the patient’s bloodstream.

2. Positron Emission and Annihilation – The tracer emits positrons, which collide with electrons, producing gamma rays.

3. Detection and Imaging – PET scanners detect these gamma rays and reconstruct 3D images showing metabolic activity within organs or tissues.