Contraindication to breast MRI (such as non-compatible cardiac pacemakers or intracranial vascular clips, allergy to Gadolinium)

Bilateral breast cancer or treatment such as:

History of or planned bilateral breast irradiation

History of or planned bilateral mastectomy

Bilateral breast cancer

History of unilateral mastectomy or radiation treatment with contralateral breast cancer

Taking chemo- or hormonal therapy at the time of the baseline breast MRI

Estrogen and progesterone receptor negative breast cancer

GFR less than GFR \< 30 mL/min/1.73m2

Postmenopausal women

Pregnant and/or nursing women

Less than 21 years of age

Prospective Analysis of Changes in Background Parenchymal Enhancement (BPE) and Amount of Fibroglandular Tissue on Breast MRI