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Breast-Specific Gamma Imaging

Breast-specific gamma imaging or molecular breast imaging is a diagnostic procedure performed as a follow-up study to a mammogram that detects cancer or is inconclusive in its findings. BSGI is used to detect:

Sample Scan

Molecular Imaging and Breast Cancer Fact Sheet Image

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63 year-old woman with an initially classified stage 4 invasive ductal carcinoma in right breast. PET/CT shows large breast tumor penetrating the skin and pectoral muscle and with a high FDG uptake in the internal mammary node.

  • additional lesions missed by mammography and physical exam
  • cancers that are difficult to detect using mammography.

The procedure involves the use of a radiotracer called Technetium-Tc99m-Sestamibi that is injected into the patient’s bloodstream and accumulates in cancerous tissue. Images acquired with a special gamma camera modified for breast imaging reveal abnormal areas where the radiotracer has distributed.

Advantages of BSGI

Recent studies have shown that BSGI is able to:

  • identify breast cancers that are difficult for mammography to detect
  • provide information that helps physicians and patients choose the most appropriate treatment plan.