Can you tell me the difference between breast mri and mammography?

Lots of differences: Mammogram looks for abnormal calcifications. Mri detects abnormally active tissue with the aid of contrast. Since cancer cells are more active, they absorb more of the contrast and can be seen on the MRI images. One is not better than the other. They each have a specific use.

About $2000: Mammograms are the"gold standard" for breast cancer screening because they miss few cancers (~10%) and are inexpensive. Mris are more sensitive than mammograms and are especially useful for women with very dense breast tissue, however they are very expensive. If you do get an MRI we still recommend mammograms because microcalcifications are better seen that way.

MRI more sensitive: Mammograms can miss up to 50% of cancers depending on the density of a woman's breasts. Mri's will miss less than 10% of cancers regardless of breast density. That being said, a woman over 40 should always get yearly mammograms which find the earliest form of breast cancer (dcis) sometimes not visible on mri. Average risk women do not qualify for insurance coverage of screening mammogram.