Precision Supplemental Imaging in Women With Dense Breasts

Inclusion Criteria: * Normal screening mammogram within 90 days prior to enrollment. Bi-Rads of 1 or 2. * Dense breasts, either: * Class C density ("the breasts are heterogeneously dense, which may obscure small masses") * Class D density ("the breasts are extremely dense, which lowers the sensitivity of mammography") * Assigned female at birth. * Between 40 to 74 years of age (inclusive). * Ability to understand and willingness to sign an IRB approved written informed consent document. Exclusion Criteria: * Screening mammogram with BI-Rads of 0. * Contraindication to MRI with contrast (e.g. claustrophobia, metal objects in the body, known sensitivity/allergy to gadolinium). * Prior or concurrent malignancy whose natural history has the potential to interfere with the study intervention (breast cancer or non-classic LCIS). Patients with prior or concurrent malignancy that does NOT meet that definition are eligible for this trial. * Prior MRI screening of the breast. * Known to be BRCA 1/2 positive or presence of any other known high penetrance genetic marker. * Is receiving any endocrine therapy. * Has breast implants. * Is breastfeeding.