Ultrasound in Medical & Industrial Imaging (OCR GCSE Physics A (Gateway Science Suite)): Flashcards
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Practise the cards
12 cards from this deck
What is ultrasound?
What is ultrasound?
Sound waves above Hz
Why can't humans hear ultrasound?
Why can't humans hear ultrasound?
Frequency above human hearing range
Definition of echoes
Definition of echoes
Reflections of sound
What happens to ultrasound at tissue boundaries?
What happens to ultrasound at tissue boundaries?
Some wave is reflected back
How is tissue boundary distance measured?
How is tissue boundary distance measured?
Time taken for wave reflection
Common medical ultrasound use
Common medical ultrasound use
Pre-natal imaging of foetus
Why ultrasound safer than X-rays for foetus
Why ultrasound safer than X-rays for foetus
Non-ionising waves
Industrial ultrasound use
Industrial ultrasound use
Find inner structure of pipes/materials
Normal ultrasound reflection point in materials
Normal ultrasound reflection point in materials
Far side of material
Cause of early reflection in materials
Cause of early reflection in materials
Fault in material
How is fault position determined?
How is fault position determined?
Time taken for echo to return
Can ultrasound pass through the body?
Can ultrasound pass through the body?
Yes