Feasibility study of MRI guided breast biopsy

INTERVENTION: Follow up term:6 months. After contrast enhanced MRI, local anesthesia is performed, handheld vacuum assisted biopsy needle (BIRD Vacora biopsy system)is inserted, adjusted, and biopsy is performed. CONDITION: suspected breast cancer PRIMARY OUTCOME: Safty of the procedure. SECONDARY OUTCOME: Possibility of pathological diagnosis.; Feasibility of the procedure. INCLUSION CRITERIA: 1) breast cancer is suspected on contrast enhanced MRI. 2) the lesion is not identified on ultrasound or mammography. 3) an informed consent was obtained after a detailed explanation.