Molybdenum target mammography radiation is ionizing radiation which may cause cancer and screening mammography is low radiation intensity about 0.4mSv. Mammography examination uses soft X-ray to take breast photo and to get its image data. The amount of radiation received for once mammography examination is according to the amount of two hours sunbathing radiation, which is relatively safe.

However the radiation hazards of mammography can not be ignored. A few studies found that compared annual mammography inspection healthy women and non-inspection high-risk groups, annual mammography inspection healthy women breast cancer risk is higher, increased by 1.5 times. Compared high-risk group mammography inspection with those who do not accept the screening the risk of breast cancer is increase by 2.5 times. But several studies are small, not enough to describe the problem. If we delayed mammography examination age and annual examination change for every two years, the possibility of cancer will appear many years later. But for those who with BRCA1 / BRCA2 mutations should more pay attention, because of the low doses of radiation on genetic mutation larger.

In 2009, the US Preventive Services Expert Group (USPSTF) made new recommendation, proposed 50-year-old to 74-year-old woman mammography every two years. However, some authorities recommend women to carry mammography examination from the age of 40 every year.

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