TED-Ed: How X-rays see through your skin - Ge Wang

The video explains the accidental discovery of X-rays by Wilhelm Roentgen, who noticed invisible rays passing through cardboard. These rays, later called X-rays, are produced when high-energy electrons in a cathode tube hit a metal component, releasing energy. X-rays can penetrate various materials, making them useful for medical imaging. However, 2-D X-ray images have limitations, as they only show the sum of interactions along the path. CT scans, which take X-ray views from multiple angles, provide detailed cross-sectional images, aiding in the detection of tumors, blood clots, and other medical conditions. CT scans have become a vital tool in modern medicine, with millions conducted annually worldwide.

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