Ultrasound in Medical & Industrial Imaging (AQA GCSE Physics): Flashcards
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Practise the cards
12 cards from this deck
Minimum frequency of ultrasound
Minimum frequency of ultrasound
Above Hz
Can humans hear ultrasound?
Can humans hear ultrasound?
No
What happens at tissue boundaries?
What happens at tissue boundaries?
Some ultrasound is reflected back
What are echoes?
What are echoes?
Reflections of sound
What is measured in ultrasound imaging?
What is measured in ultrasound imaging?
Time taken for waves to be reflected back
Common medical use of ultrasound
Common medical use of ultrasound
Pre-natal imaging of a foetus
Why is ultrasound safer than X-rays for foetus?
Why is ultrasound safer than X-rays for foetus?
Sound waves are non-ionising
Industrial use of ultrasound
Industrial use of ultrasound
Finding inner structure/faults in pipes & materials
Where is ultrasound normally reflected in materials?
Where is ultrasound normally reflected in materials?
Far side of the material
What causes earlier reflection in materials?
What causes earlier reflection in materials?
A fault in the material
How is fault position determined?
How is fault position determined?
Time taken for echo to return to detector
Ultrasound can be reflected and...
Ultrasound can be reflected and...
Refracted