To learn more about how these calculations are made, see the About page.

Ultrasound and MRI do not use ionizing radiation and have no risk of inducing cancer. While excellent for many things, MRI and Ultrasound are often not the best test and CT scans or x-rays are preferred. Talk to your healthcare provider about imaging options and what is best for you.

Please see Glossary for description of different studies.

Study Gender Age # of exams Dose (mSv) Additional Cancer Risk(%) 0 % Your results will appear here but will be deleted after 20 minutes of inactivity. Totals: 0 0 0%

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Comparison Doses Natural Background 3.1 mSv/year10 Domestic Pilots 2.2 mSv/year11 Average US Exposure 6.2 mSv/year10 7 Hour Airline Flight 0.02 mSv12 Chest x-ray (2 views) 0.10 mSv Chest CT 7.0 mSv

Estimated Lifetime Risk of Death from Various Sources13

Motor Vehicle Accident 1% or 1 in 100 chances Drowning 0.1% or 1 in 1000 chances Bicycle Accident 0.01% or 1 in 10,000 chances Lightning 0.001% or 1 in 100,000 chances

Keep in mind, the overall lifetime risk of developing an invasive cancer is 37.5% (1 in 3) for women and 44.9% (1 in 2) for men regardless of imaging history. These statistics are averages and do not predict what is going to happen to you. They do not take into consideration individual risk factors including lifestyle (smoking, diet, exercise, etc), family history (genetics) or radiation exposure. The majority of cancers occur later in life and the average lifetime risk of dying from cancer is 25% (1 in 4).