http://www.fda.gov/cdrh/mammography/index.html
Center for Devices and Radiological Health, U.S. Food and Drug Administration
In keeping with the Mammography Quality Standards Act of 1992 (MQSA), all mammography facilities in the U.S. (except those of the Department of Veterans Affairs) were required to be certified by the U.S. Food and Drug Administration (FDA). Visit this site for more details about the FDA's mammography program.