Technetium-99 cardiac imaging (Tom's exam)
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In fact, I had a technetium study of my heart about two weeks ago. I went to Mount Auburn Hospital and they injected me with technetium-99, with a half-life of about ten hours. I was just glowing. They could take a radiograph of me, my heart pumping. But technetium and polonium and francium would be down off the chart at the bottom.