In situations where the mammogram reading is unclear, additional breast imaging methods may be used. One technology, called Miraluma, uses a weakly radioactive substance known as technetium.

The weakly radioactive compound is injected into the bloodstream. The drug will concentrate up to nine times higher in cancer cells than in normal cells. A gamma camera can detect very low levels of radiation, far below the level that would be harmful to the human body. A computer receives information from the gamma camera and builds an image of the breast.