The earlier that breast cancer is detected, the more likely it is that treatment can be curable. Mammograms can detect cancer up to two years before a lump can be felt. Screening mammograms are simply x-rays of each breast from the top and the side. The amount of radiation from a mammogram is very small. Regular mammograms can decrease the mortality of breast cancer by 30%. The majority of breast cancers are associated with abnormal mammographic findings. Regrettably, about two-thirds of women do not follow recommended guidelines for mammography.