Congratulations on your reunion and five year survival.
Regarding molecular breast imaging or breast specific gamma imaging or scintimammography (they're all the same), you have to realize that it is still somewhat "new" or "unproven" and not yet community practice. I'm not sure if you can say that it is the best. Certainly you can't say that it's "definitive." This technology has actually been around for a little while (scintimammography), since the 90's. They just came out with more dedicated (smaller) gamma cameras now. Whether it wil be "standard" in the future remains to be seen.
For right now, mammography is the only modality that has had massive mulitcenter trials spanning many years and is the only modality proven to save lives (reduce mortality).
If your still interested in breast specific gamma imaging, you can still have it done at Beth Israel (assuming it's the Beth Israel in NY city.) Is Dr. Feldman a surgeon? If he is, he doesn't actually read the imaging studies; the radiologist or nuclear medicine physician reads them. I think Dr. Feldman went to Columbia Presbyterian.