The element that can make bones glow

Scientists spent years searching for Technetium, a chemical element that came, in time, to play a crucial role in medical diagnosis. So crucial in fact that a new search is already under way - to find a fresh and reliable source of the elusive metal substance, before current sources dry up. "It is an element beloved of chemists," explains chemist Andrea Sella of University College London, "because

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by Laurence Knight 造影剤として活躍しているテクネチウム（43 Tc）の話。今のところ原子炉から取っているので、新しい調達方法が提案されているところ。