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In breast-conserving surgery (BCS), complete removal of breast cancers and minimal expulsion of normal cells are very important. Since surgery is a burdensome treatment for the patient, the surgical procedures should be minimally invasive while ensuring the maximum degree of completion. Before and after surgery, the location of the tumor and the presence of residual tumor can be checked through examination outside the operating room. However, if residual tumors are identified in the postoperative examination, reoperation or additional chemotherapy is required. Therefore, in order to improve the degree of completion during surgery, a small real-time device that can be used inside the operating room is presented. Using these devices, the presence of residual tumor can be examined before suturing the affected area. Furthermore, this article proposes how detecting the exact location will improve the completion of the initial surgery.