For this study, the investigators plan to evaluate DWI scans performed in women with breast lesions identified by conventional breast MRI. The investigators will determine whether an ADC threshold can be defined for distinguishing benign and malignant lesions on DWI, assess the difference in ADC cutoffs for mass and non-mass lesions, and investigate the potential improvement in accuracy using techniques such as nonzero minimum b-value (to remove perfusion effects in the ADC measures) and normalized ADC measures (to account for variations in water content and other factors).
