PET scans, or positron emission tomography scans, are a type of nuclear medicine imaging that uses a radioactive tracer to detect metabolic activity in the body. This information can be used to diagnose and monitor a variety of diseases, including cancer, heart disease, and brain disorders. PET Scan.
PET scans work by injecting a radioactive tracer, such as fluorodeoxyglucose (FDG), into the bloodstream. FDG is a sugar molecule that is taken up by cells that are using a lot of energy, such as cancer cells. Once FDG is inside a cell, it breaks down and releases positrons, which are positively charged particles. The positrons travel a short distance before they annihilate with electrons, which releases two gamma rays. These gamma rays are detected by the PET scanner and used to create an image of the body’s metabolic activity.
What PET Scans Can Detect
PET scans can detect a variety of diseases, including:
Preparing for a PET Scan
There are a few things you can do to prepare for a PET scan:
What to Expect During a PET Scan
A PET scan is typically painless and non-invasive. You will be asked to lie on a table that is attached to the PET scanner. The radioactive tracer will be injected into your bloodstream, and you will be asked to lie still for about 30 minutes while the scan is being performed.
The Benefits of PET Scans
PET scans offer several benefits, including:
The Risks of PET Scans
PET scans are generally safe, but there are a few potential risks, including:
PET scans are a powerful tool that can be used to diagnose and monitor a variety of diseases. They are a valuable asset in the fight against cancer and other diseases.
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