(AQA GCSE P3.1.2) Ultrasound

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  • Created by: Em
  • Created on: 18-04-13 21:31
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  • Ultrasound
    • Vibrations per second = Frequence (Hz)
      • Humans can hear 20Hz - 20,000Hz
        • Anything higher than 20,000Hz is ULTRASOUND
    • EXAMPLES OF USES
      • Ultrasound scanner linked to a transducer
        • Ultrasound waves emitted and partially reflected off different media i.e. bones, muscle, etc
          • Time taken for ultrasound to reflect back to transducer measured and from this the distance of each boundary is measured
            • Image formed
      • Prenatal scanning
        • Used to check how the pregnancy is going and whether the baby is in good health
      • High frequency ultrasound can be used to break down kidney stones which are painful, and the stones can then pass out of the body without needing surgery
    • s (distance, m) = v (speed, m/s) x t (time, s)
    • Ultrasound is non-ionizing and creates accurate images of soft tissue unlike x-rays.
  • Vibrations per second = Frequence (Hz)
    • Humans can hear 20Hz - 20,000Hz
      • Anything higher than 20,000Hz is ULTRASOUND

Comments

Antonia Loizou

This is really good but I think you made a mistake about ultrasound creating an accurate image. They create a fuzzy image and x-rays create a clear image of bones and metal that's why they are used to see if bones are broken and things like that whereas ultrasound isn't used for things like that as they produce fuzzy images.

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