How accurate is mammography in detecting an abnormality in the breast?

How accurate is mammography in detecting an abnormality in the breast?

Kenneth W. Chin (M.D., F.A.C.R.) gives expert video advice on: How should I prepare for a mammogram?; What does mammography equipment look like?; What can I expect when getting a mammogram? and more...

In patients with very fatty breasts, mammography can be accurate up to 95 percent of instances. In patients with very, very dense breasts, the accuracy drops to as low as 45 percent.