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    robo35's Avatar
    robo35 Posts: 9, Reputation: 1
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    #1

    Mar 13, 2009, 09:26 PM
    Radioactivity - lead apron
    Why does a dentist lay a large lead apron across his/her patients torso when his/her teeth are being x-rayed?
    BIGBOPPER's Avatar
    BIGBOPPER Posts: 351, Reputation: 28
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    #2

    Mar 13, 2009, 10:02 PM

    X-rays are not as focused as people think. This website will tell you how they work, HowStuffWorks "How X-rays Work". The X-Ray radiation is scattered about the room, that is why technicians typically leave the room to do any X-Ray. The apron covers your vital organs, preventing them from getting any unnecessary radiation.
    sarnian's Avatar
    sarnian Posts: 462, Reputation: 9
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    #3

    Mar 14, 2009, 02:37 AM
    Hello robo

    Indeed as bigbopper posted X-rays do not form a narrow beam, but stray into all directions.
    The apron is to shield the rest of the patient. The straying X-rays are also the reason why all staff leaves the room and protect themselves behind a X-rays shield in the wall between.

    Note : the yearly dosis of X-rays should be kept as low as possible. Besides medical X-rays there is also a daily dosis of background radiation.
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