Betty Daniel gets a routine yearly mammogram from mammography tech Stella Palmer at Mount Sinai Hospital in Chicago in 2012. Heather Charles/MCT/Landov hide caption

itoggle caption Heather Charles/MCT/Landov

A mammographer prepares a screen-film mammography test for patient Alicia Maldonado at a hospital in Los Angeles. Damian Dovarganes/AP hide caption

itoggle caption Damian Dovarganes/AP

Mammograms may pose a particular risk to women with genetic mutations that predispose them to breast cancer. Bill Branson/National Cancer Institute hide caption

itoggle caption Bill Branson/National Cancer Institute

Radiologist Gerald Iba checks mammograms at The Elizabeth Center for Cancer Detection in Los Angeles in May 2010. Damian Dovarganes/AP hide caption

itoggle caption Damian Dovarganes/AP

An estimated 45,000 people took part in the Susan B. Komen Race for the Cure in Little Rock, Ark., in Oct. 2010. But after a controversy involving potential cuts to funding of Planned Parenthood earlier this year, participation in fundraising races has dropped. Brian Chilson/AP hide caption

itoggle caption Brian Chilson/AP

This illustration shows a device made by MammoSite used to deliver targeted doses of radiation as part of brachytherapy. Courtesy Radiological Society of North America hide caption

itoggle caption Courtesy Radiological Society of North America