Inclusion Criteria:  a diagnosis of primary breast tumor for which a surgical resection (excisional, biopsy, segmentectomy or mastectomy) is planned. Tumor is palpable or visible on ultrasound or both All participants need to be fully able to give informed consent  Exclusion Criteria:  Gender: male Mental or legal incompetence Impaired decision-making capacity Pregnant women may not participate Implanted Pacemaker