They can be used to diagnose and treat medical conditions
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What can they be used to diagnose?
Bone fractures and dental problems
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How can x-rays treat medial conditions?
Kill cancer cells
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What is used to help identify problems?
CT scans
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What are the advantages of using a CT scan over an X-ray?
They produce 3D images and so can be observed from all angles
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What device allows images to be formed electronically?
Charged-coupled devises (CCDs)
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What material are x-rays absorbed by?
Metal and bone
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What are x-rays transmitted by?
Soft tissue
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What can x-rays cause?
ionisation
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What's a uses are there of ultrasound for medical treatment?
Breaking down kidneys stones to be rid of through urine. Repairing damaged tissue muscle. Removing plaque from teeth.
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What frequency do ultrasounds have?
High
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What are ultrasounds absorbed by?
Soft tissue
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What type of waves are x-rays?
Transverse waves
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What type of waves are ultrasounds?
Longitudinal waves
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Can humans hear ultrasounds?
No. They are a over the human upper limit of hearing
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What happens to ultrasound inside the body?
They travel at different speed through different media. Partially reflected when it meets the boundary of different media.
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Why shouldn't X-ray's bed used to produce an image of an unborn child?
They are ionising and will damage cells
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What precautions do people take when using X-rays?
Stand behind a screen so stray X-rays are absorbed and radiation dose is reduced. Wear a film badge so they can make sure that they are nit overexposed to radiation.
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Other cards in this set
Card 2
Front
Why are x-rays useful?
Back
They can be used to diagnose and treat medical conditions
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