What discovery by the Curies expanded the possibilities of medical radiation treatment?
Answer
Polonium and radium
Marie and Pierre Curie identified the radioactive elements polonium and radium. This discovery provided a new, portable, and consistent source of radiation for medical use. By utilizing these materials, doctors gained the ability to apply radiation locally through brachytherapy, which allowed for targeted treatment of tumors that were previously difficult to reach with the external beam technology available at the turn of the century.
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