Mammography is an x-ray exam that produces images of the internalstructures of the breasts. It is the most accurate method in evaluating the entire breast. These images can detect lumps that are too small to be felt by you or your doctor, as well as abnormal calcifications. Digital mammography produces superior images with very small radiation exposure. The American Cancer Society recommends mammography, breast self-examination and periodic exams by your doctor, as the best means to detect breast cancer in its earliest stages.