Screening Contralateral Breast Cancers in Patients With Newly Diagnosed Breast Cancer

* This is a multicenter, intraindividual comparative cohort study. * A total of 1098 women with newly diagnosed breast cancer will be enrolled in this study. * Each eligible woman with newly diagnosed invasive breast cancer will undergo DCE MRI and DWI at a 3T MR scanner. * Contrast-enhanced MRI and DWI will be interpreted independently according to the Breast Imaging Reporting and Data System (BI-RADS) and likelihood of malignancy (Score range, 0%-100%) by trained radiologists. * BI-RADS final assessment score of 3, 4 or 5 are considered to be positive. * Pathology of core or surgical biopsy and 2 year follow up is the reference standard.