Normal Anatomy

normal MR image, with outlines on features

T1: Fat is white (moderate signal), and parenchyma is lacy and dark (low signal)

T1C+ (post-contrast): Normal breast parenchyma may enhance uniformly depending on point in menstrual cycle

normal MR images, comparing fatty and dense breasts

Background breast enhancement level: Analogous to breast density on mammography (harder to detect malignancy with marked background enhancement), but varies with menstrual cycle

Minimal A, Mild, Moderate, Marked B