Inclusion Criteria:  Women age ≥18 Patients with fibroadenoma (benign tumor) or early-stage, non-metastatic breast cancer (stage I without the involvement of axillary lymph nodes) Scheduled to receive surgical resection of the tumor by the clinical care team (ideal target lesion upper boundary should be deeper than 1 cm below the skin, and the ideal size of the lesion should be 2-5 cm in diameter)  Exclusion Criteria:  Pregnant or lactating women Patients with breast implants Patients with a history of laser or radiation therapy to the targeted breast Patients who have received or are scheduled to receive thermal ablation or treatment of the tumor (other than surgery) as part of clinical care