Ultrasound

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1. What can Ultrasound therapy be used for?

  • Can move kidney stones out of the kidneys without them moving naturally.
  • To break painful kidney stones into little bits so the fragments are small enough to leave the kidneys naturally.
  • To treat cancerous cells.
  • To ionise cells.
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2. What happens to Ultrasound waves after a transducer has emitted pulses?

  • It is partially reflected from the different tissue boundaries in its path and returns to the transducer to create an image on a screen.
  • They travel through tissue to the other side of the body.
  • They produce images of broken bones on a screen because the waves pass through things that are not dense like bone.
  • The waves return to the transducer all at once to create an image on a screen.

3. What frequency range of sound waves can the human ear hear?

  • 20Hz to 20 000Hz
  • 5Hz to 5 000Hz
  • 50Hz to 50 000Hz
  • 10Hz to 10 000Hz

4. What are Ultrasound waves used for?

  • To detect broken bones.
  • Prenatal scans of a baby in the womb.
  • To detect cancerous cells.
  • To treat illness.

5. What, other than medical uses, do Ultrasound waves have?

  • Detecting fish in the sea.
  • Detecting metal under the sand (metal detectors).
  • Detecting oil on the sea bed.
  • Cleaning glass.

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