PET scan stands for Positron Emission Tomography scan. It is a medical imaging technique that uses a special type of camera and a radioactive tracer to create detailed images of the body’s internal structures and functions.
During a PET scan, a small amount of a radioactive substance, known as a tracer, is injected into the patient’s bloodstream. The tracer emits positrons, which are particles that interact with electrons in the body’s tissues and release gamma rays. The PET camera detects these gamma rays and uses them to create three-dimensional images of the body’s metabolic activity and functions.
PET scans are used to diagnose and evaluate a variety of medical conditions, including cancer, heart disease, and neurological disorders. They can help doctors detect abnormalities in the body’s tissues and functions, such as changes in blood flow, glucose metabolism, or oxygen consumption.
PET scans are particularly useful in cancer diagnosis and treatment planning, as they can help doctors determine the extent and location of cancerous tumors, as well as evaluate the effectiveness of treatments such as chemotherapy and radiation therapy.
PET scans are safe and non-invasive, although they do involve exposure to a small amount of radiation. Patients should inform their doctors if they are pregnant or breastfeeding, as radiation can potentially harm a developing fetus or infant.