Mammography uses low-dose x-rays to produce a picture of the internal structure of the breast. Additional angles and magnified views are taken of suspicious areas. A mammogram may help in the diagnosis of breast problems, including cancer. Although recommendations vary, many experts suggest that a woman have a baseline mammogram at age 40, followed by a mammogram every couple of years until age 50. After 50, a woman should have a mammogram every 1 - 2 years.