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But the amount of radiation you're exposed to in a standard PET scan is safe. The radiotracer becomes quickly less radioactive over time and will usually be passed out of your body naturally within a few hours. Drinking plenty of fluid after the scan can help flush it from your body.
Will I be radioactive after a PET scan?
You will not be radioactive after a CT scan. With a PET or a PET/CT scan, you will give off very low levels of radiation for around 6 hours afterwards. As a precaution, you should avoid being close to women who are pregnant during this time.
How do you get rid of radiation after a PET scan?
The radioactive material passes out of the body through urine or stool (feces). It may take a few hours or days to completely pass out of the body. Drink lots of fluids after the test to help flush it out.
Why can’t you be around pets after a PET scan?
This prohibition is generally for 6 hours. Physicians provide this warning because the radioactive material used in the scan, 2-fluorodeoxy-D-glucose (2FDG), may damage growth in immature individuals. Unfortunately in the discharge instructions from the scan facility, pets are often overlooked.
How many PET scans can you have in your lifetime?
Subramaniam says the three-scan limit applies to any tumor type, not just lung, and he and his investigators are researching whether additional scans have value in other cancers, including colorectal and breast cancers.
What should I avoid after a PET scan?
Foods Not Allowed
- No cereals.
- No pasta.
- No dry beans.
- No fruit and fruit juices.
- No sugar, honey, desserts or candy.
- No starchy vegetables, such as peas, corn, potatoes.
- No alcohol.
- No nutritional shakes or smoothies.
How much radiation does a PET scan have?
A PET/CT exposes you to about 25 mSv of radiation. This is equal to about 8 years of average background radiation exposure.
What is a disadvantage of a PET scan?
Limitations of a PET Scan A PET scan is less accurate in certain situations: Slow-growing, less active tumors may not absorb much tracer. Small tumors (less than 7mm) may not be detectable. High levels of blood sugar can cause the cells to absorb this normal sugar rather than the radioactive, injected kind.
What are the disadvantages of a PET scan?
Limitations of a PET Scan A PET scan is less accurate in certain situations: Slow-growing, less active tumors may not absorb much tracer. Small tumors (less than 7mm) may not be detectable. High levels of blood sugar can cause the cells to absorb this normal sugar rather than the radioactive, injected kind.
What cancers do not show up on a PET scan?
On the other hand, tumors with low glycolytic activity such as adenomas, bronchioloalveolar carcinomas, carcinoid tumors, low grade lymphomas and small sized tumors have revealed false negative findings on PET scan.
