求翻译：According to findings presented at the American Society of Clinical Oncology Breast Cancer Symposium in San Francisco, California, Breast-Specific Gamma Imaging (BSGI), a molecular breast imaging technique with comparable sensitivity to breast magnetic resonance imaging (MRI) for detecting breast carcinoma when used in pre-surgical planning for patients with known cancer diagnoses and is substantially less expensive than MRI.是什么意思？

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