3-D Vs. 2-D Mammograms — What's The Difference? Tuesday, May 23, 2017 | Sacramento, CA Listen / download audio Update RequiredTo play audio, update browser or Flash plugin. What is a 3-D mammogram? UC Davis radiologist Dr. Karen Lindfors talks about this technology, how it differs from traditional 2-D mammography and why it is increasingly recommended. UC Davis biostatistician Dr. Diana Miglioretti shares her research about different screening procedures and their effectiveness. Her work has informed the new screening guidelines.