Nuclear medicine scans (also known as nuclear imaging, radionuclide imaging, and nuclear scans) can help doctors find tumors and see how much cancer has spread in the body (called the cancer stage). They can also be used to decide if treatment is working. PET scan uses a mildly radioactive drug to show areas of the body where cells are more active than normal. It is used to help diagnose some conditions, such as cancer.
It can also help to know where and if the cancer has spread. Radioactive scans can help doctors diagnose some types of neuroendocrine tumors. You get an injection of a low-dose radioactive substance, which may appear on a scan. A bone scan is a nuclear medicine test.
This means that the procedure uses a very small amount of a radioactive substance, called a tracer. The tracer is injected into a vein. The marker is absorbed in different amounts and those areas are highlighted in the scan. When cells and tissues are changing, they absorb more of the marker.
This may indicate the presence of cancer.