Breast cancer is the most frequent cancer of women in the western hemisphere. This book presents a new imaging modality of the breast which improves the possibilities of mammography at a very high level: Cancers can be detected at a very early stagey MRM. The huge number ofbreast biopsies can be reduced dramatically. Even tiny breast cancers (e.g.3mm) can be detected. The prognosis for women with breast cancer will improve due to earlier detection.