Ultrasound Flashcards

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1
Q

Can we hear the ultrasound?

A

No,

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2
Q

How can we calculate a ultra sound, using a equations?

A
S = V x T
S= distance in metres, m
V= speed in metres per second, m/s
T= time in seconds, s
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3
Q

Why do humans use ultrasound?

A

The principal of ultrasound scans is to check that a foetus is developing normally and to take Measurements of it’s growth.

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4
Q

Why are X-rays bad?

A

X-rays are ionising which means that they damage living tissues and the DNA within the cell.

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5
Q

Why are ultrasounds safe?

A

Ultrasounds are not ionising, and so they are safe to use when performing a foetal scan

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6
Q

What are the difference between X-ray and ultra sound?

A
  1. X-rays have a much shorter wavelength, this means they produce higher quality images
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7
Q

What is a ultra sound?

A

Sound with a frequency greater than 20,000Hz (20kHz)

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8
Q

Ships use____ _______ to detect objects in deep water and measure water depth.

A

Echo sounding

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9
Q

Ultrasound waves are sound waves of frequency______ _________.

A

Above 20 000Hz

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10
Q

Ultrasound waves are _______ ______ when they meet a boundary between two different substances.
The____ ____ for the reflection to reach a detector can be used to determine how____ ____the boundary is.

A
  1. Partially reflected
  2. time taken
  3. far away
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11
Q

Ultrasound waves to be used for both_____ and _______ imaging e.g pre-natal scans to check the unborn baby.

A
  1. medical

2. industrial

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