PET Imaging, or Positron Emission Tomography, is a medical imaging technique that helps visualize metabolic processes in the body. It uses a small amount of radioactive material, called a tracer, which is injected into the patient. This tracer emits positrons, which are detected by the PET scanner to create detailed images of organs and tissues. The images produced by PET Imaging can help doctors diagnose conditions such as cancer, heart disease, and brain disorders. By showing how tissues function, rather than just their structure, PET Imaging provides valuable information for treatment planning and monitoring disease progression.