Nuclear Medicine

Nuclear Medicine is the branch of medicine that uses small amounts of radioactive material to diagnose and, in some cases, treat disease. Imaging tests such as PET scans and bone scans allow doctors to see how organs and tissues are functioning, not just what they look like structurally, which sets this branch apart from standard imaging like X-ray or MRI.

Beyond diagnosis, certain nuclear medicine treatments use targeted radiation to treat specific conditions, such as radioactive iodine therapy for an overactive thyroid or certain thyroid cancers. Because it works at a functional, cellular level, this branch is often used to detect problems, such as cancer spread or reduced blood flow to an organ, that other imaging methods may not clearly show.

A nuclear medicine test typically involves receiving a small dose of a radioactive tracer, either by injection, swallowing, or inhalation, followed by imaging with a specialized camera that detects the tracer’s signal. The amount of radiation used is carefully controlled and is generally considered safe, though patients are usually advised on any temporary precautions afterward, such as limiting close contact with others.