Ultrasound
- Created by: ElLiEbUrDeN
- Created on: 22-03-17 21:46
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- Ultrasound
- Uses of ultrasound
- When ultrasound is used in body scan, a pulse o ultrasound is sent through the body
- At each boundary between different tissues some ultrasound is reflected, and the rest is transmitted
- The returning echoes are recorded and used to build up an image of the internal structure
- At each boundary between different tissues some ultrasound is reflected, and the rest is transmitted
- Used to break down kidney stnoes into smaller peices
- Ultrasound is preferred to x-rays because:
- It doesn't damage cells
- It is able to produce images of soft tissue
- When ultrasound is used in body scan, a pulse o ultrasound is sent through the body
- Velocity = frequency X wavelength
- Ultrasound is a sound above 20,000 Hz which is a higher frequency than humans can hear
- It travels as a longitudinal wave containing compressions and rarefractions
- Feature of a longitudinal wave are:
- The louder the sound, or the more powerful the ultrasound the more energy is carried by the wave and the larger its amplitude
- They can't travel through a vacuum
- The hiigher the frequency or pitch, the smaller the wavelength
- Rarefractions are reions of lower pressure
- Compressions are regions of higher pressure
- Feature of a longitudinal wave are:
- Uses of ultrasound
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