X-rays, gamma rays, and other forms of ionizing radiation are used to diagnose and treat some medical conditions. This can be in the form of radiation that penetrates from outside the body, or radioactive particles that are swallowed or inserted into the body. Certain types of imaging tests, such as x-rays, CT scans, and nuclear medicine tests such as PET scans and bone scans expose people to low levels of radiation in order to create internal pictures of the body. Some imaging tests, such as MRI and ultrasound do not expose people to ionizing radiation. In adults: The amount of radiation varies depending on the test. For example, the exposure from a 2-view chest x-ray is about 0.
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Not entirely. Just living on this planet exposes you to some radiation. You can, however, limit your exposure to some sources of radiation, such as x-rays from imaging tests, radiation in the workplace, and radon in your home. In recent years, the average amount of radiation a person is exposed to from medical tests has risen. This is of particular concern for children, because their growing bodies are especially sensitive to radiation.
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Many of the most important risk factors for breast cancer are beyond your control, such as age, family history, and medical history. However, there are some risk factors you can control, such as weight, physical activity, and alcohol consumption. Be sure to talk with your doctor about all of your possible risk factors for breast cancer. There may be steps you can take to lower your risk of breast cancer, and your doctor can help you come up with a plan.
Radiation of certain wavelengths, called ionizing radiation , has enough energy to damage DNA and cause cancer. Ionizing radiation includes radon, x-rays, gamma rays, and other forms of high-energy radiation. Lower-energy, non-ionizing forms of radiation, such as visible light and the energy from cell phones , have not been found to cause cancer in people. Radon is a radioactive gas given off by rocks and soil. Radon is formed when the radioactive element radium breaks down.