MQSA stands for Mammography Quality Standards Act. The act was passed by the US Congress in 1992 and regulates the use of mammography equipment in order to ensure high-quality images are obtained. Facilities that are certified under MQSA must meet certain standards set forth by the FDA or state government in order to maintain certification. This includes regularly testing the equipment, having trained personnel, and displaying an MQSA Certificate of Approval prominently in view of patients.