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What is a PET scan and how does it work?
A PET (positron emission tomography) scan is a type of imaging test that uses radioactive glucose (radiotracer) to see where cancer cells may be. Since cancer cells intake more glucose than normal cells, injecting some glucose into a vein can reveal where cancerous cells are in the body when scanned and examined with computerized images. 1 锘匡豢锘?/div>PET Scan: Cancer Staging and Treatment – Verywell Health
What happens before a PET scan for cancer?
Before the scan you will have a small amount of mildly radioactive glucose solution injected through a small plastic tube (cannula) in your arm. Cancer cells absorb more of the solution than normal cells and will show up brighter on the scan.
What are the steps in a PET scan?
The following steps occur during a PET scan: You receive an IV injection of a radiotracer that contains a safe amount of a radioactive drug. The most commonly used radiotracer is fluorodeoxyglucose (FDG). You sit in a chair for about an hour while the radiotracer moves through your bloodstream.
How long does a PET-CT scan take?
If a PET-CT scan is performed, the CT scan will be performed first. The CT scan only takes around two minutes. The PET scan will follow and can take anywhere from 20 to 45 minutes, depending on the purpose and scope of the test. Some variations of the test can take longer.