Ultrasound

Ultrasound

Risks
1. Non-ionising
2. Safer than X-rays
Formula
1. S=V*T
  1. T is the time taken in seconds
  2. S is the distance travelled in metres
  3. V is the speed of the ultrasound wave in metres per second
Uses
1. Soft tissue
  1. Eye
2. Therapy
  1. Shatter kidney stones into smaller pieces
3. Scan unborn babies
Human ear
1. Detects frequencies between 2Hz and 20,000Hz
  1. Higher frequencies than this are called ultrasound waves
Electronic systems
1. Can produce ultrasound waves
2. When a wave meets a boundary between two materials part of the wave reflects
  1. In the time between a transmitter to a boundary and back
    1. Twice the distance to a boundary
  2. The wave travels back to though the material to a detector
    1. The time it takes to reach the detector can be used to calculate how far away the boundary is
      1. The results may be processed by a computer to give an image
Ultrasound waves
1. Above 20,000 Hz
2. Ultrasounds are sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is no different from 'normal' (audible) sound in its physical properties, except in that humans cannot hear it.
Ultrasound waves in medicine
1. Destruction of kidney stones
2. Ultrasound scanning

Resource summary

	Created by MayhemMagician17 over 10 years ago