Physics - P3.2 - Medical physics

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  • Created by: shcoool
  • Created on: 27-05-15 11:56
What is an x-ray?
A wave that is part of the electromagnetic spectrum that has a very short wavelength an causes ionisation
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What are some properties of x-rays?
affect photographic film, absorbed by metal and bone, transmitted by healthy tissue, wavelength is of the same order of magnitude as the diameter of an atom
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What can x-rays be used for?
to diagnose and treat medical conditions (bone farctures, killing cancer cells, dental problems) use of CCDs allows images to be formed electronically
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What is ultrasound what can it be used for?
waves higher than the human range of hearing 20,000Hz. Used for pre-natal scanning and kidney stones
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How is ultrasound used?
They are partially reflected when they meet a boundary between two different media. The time taken for the reflections to reach a detector is used to determine how far away th eboundary is
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How do you find the refractive indes?
1/sinc
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What do optical fibres do in medical physics?
The endoscope used total internal reflection to send light into the body
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How are laser used in medical pyhsics?
cutting, cauterising and burning (eye surgery)
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Other cards in this set

Card 2

Front

What are some properties of x-rays?

Back

affect photographic film, absorbed by metal and bone, transmitted by healthy tissue, wavelength is of the same order of magnitude as the diameter of an atom

Card 3

Front

What can x-rays be used for?

Back

Preview of the front of card 3

Card 4

Front

What is ultrasound what can it be used for?

Back

Preview of the front of card 4

Card 5

Front

How is ultrasound used?

Back

Preview of the front of card 5
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