Nuclear Medicine is a medical specialty that uses small amounts of radioactive materials, or radiopharmaceuticals, to diagnose and treat various diseases. This type of imaging allows doctors to see how organs are functioning by measuring blood flow, metabolism, and other processes inside the body. Nuclear medicine is different from radiation therapy because it focuses on using small amounts of radioactive materials for diagnostic purposes rather than treating cancer directly with radiation. Common nuclear medicine procedures include bone scans, PET scans, and heart stress tests. These imaging techniques provide valuable information to help doctors diagnose conditions such as cancer, heart disease, and neurological disorders.