Breast MR imaging in the diagnostic setting.

The role of MR imaging as an adjunct in the diagnostic evaluation of findings on mammography or clinical examination continues to evolve. Clearly, the use of MR imaging to evaluate all suspicious screening findings is not reasonable or effective. In particular, the role of MR imaging in the setting of mammographic microcalcifications is limited. MR imaging may be used in cases of one or more mammographically detected masses or asymmetric density in an effort to avoid biopsy. Optimized MR imaging technique; careful mammography, ultrasound, and MR imaging correlation; and adherence to interpretation guidelines are important to avoid false-negative diagnoses.