Breast-specific Gamma imaging (BSGI)

Also known as: BSGI
Breast-specific Gamma imaging (BSGI) is a molecular study of the breast. The BSGI machine is similar to a mammogram machine: It is small and has a paddle for compression and an imaging surface.
When a patient undergoes a BSGI study, she will receive an intravenous injection of a small amount of a radiotracer (Tc 99m Sestamibi) into her arm. After a short delay, the radiology technician will position the patient's breast on the machine, as she would for a mammogram, using light pressure from the paddle. Generally two images of both breasts are taken. Each image takes about ten minutes. We also take images of each axilla as part of our breast protocol.  More images may be required by the reading radiologist.  An average BSGI exam takes approximately 90 minutes.

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Ask an Expert: When is nipple discharge a concern?

Q: “I am concerned about some discharge from one of my breasts. If I squeeze the nipple, I get a dark greenish fluid. Sometimes it also occurs spontaneously. I mentioned this during my last physical exam, but my mammogram appeared to be OK. Should I do anything else, or just wait for my next mammogram? If it’s nothing to be concerned about, what is causing it?”