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A CT scan of the abdomen (belly) and pelvis exposes a person to about 10 mSv. A PET/CT exposes you to about 25 mSv of radiation. This is equal to about 8 years of average background radiation exposure. Keep in mind that these are estimates for an average-sized adult.
Here are some approximate comparisons of background radiation and effective radiation dose in adults for several radiology procedures described on this website. These values can vary greatly, depending on the size of the patient and the type of imaging technology being used.
1 Ιουλ 2013 · Among survivors exposed to 100 mSv of radiation or less—including the doses typical for CT scans—the numbers of cancer cases and deaths are so small that it becomes virtually impossible to be...
What is computed tomography? What can a person expect during a CT procedure? How is CT used in cancer screening? What is total-body, or whole-body, CT? What is combined PET/CT? Is the radiation from CT harmful? What are the risks of CT scans for children? What is being done to reduce the level of radiation exposure from CT?
The main risks associated with CT scans are incidental results, leading to unneeded, possibly invasive, follow-up tests that may present additional risks and the increased possibility of cancer...
The effective doses are typical values for an average-sized adult. The actual dose can vary substantially, depending on a person’s size as well as on differences in imaging practices. It is also important to note that doses given to pediatric patients will vary significantly from those given to adults, since children vary in size.
