A radioactive tracer is a substance that contains a radioactive isotope and is used in various applications, particularly in medicine and research. These tracers are administered to a subject, and the radiation emitted from the tracer can be detected and measured, allowing scientists and doctors to gather valuable information about biological processes or the behavior of compounds within a system.
In the medical field, radioactive tracers are commonly used in imaging techniques such as PET scans (Positron Emission Tomography) and SPECT scans (Single Photon Emission Computed Tomography). For example, when a patient is injected with a radioactive tracer, the emitted radiation can help visualize blood flow, organ functions, or the presence of tumors. This helps doctors diagnose conditions more accurately.
In research, radioactive tracers can be utilized in various ways, such as studying metabolic pathways, tracking the movement of substances in ecosystems, or investigating chemical reactions. By using these isotopes, researchers can trace the paths of different elements and compounds more effectively compared to traditional non-radioactive markers.
Overall, radioactive tracers are significant tools in both the medical and scientific fields, enabling improved diagnostics and advanced research methodologies.