Understanding Breast Density - Professor Wendy Ingman

Is a contrast mammogram the same as 3D mammogram or is that different?  I had a contrast mammogram during my original diagnosis and have another contrast mammogram scheduled for end of January.  I umm'd and ahh'd between the MRI and the mammogram because I think the MRI is better technology but my surgeon didn't seem to think it made a lot of difference which scan I have.  I think the contrast mammogram is relatively new and improved and becoming more common (in Melbourne but not sure about Australia-wide).