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To clearly see an image, the wavelength used must be at most 1/4 of the size of the object that is to be imaged. what frequency is needed to image a fetus at 8 weeks of gestatio…
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To clearly see an image, the wavelength used must be at most 1/4 of the size of the object that is to be imaged. what frequency is needed to image a fetus at 8 weeks of gestatio…
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Jan 18, 2018
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To clearly see an image, the wavelength used must be at most 1/4 of the size of the object that is to be imaged. what frequency is needed to image a fetus at 8 weeks of gestation that is 1.6 cm long?
use 1500 m/s as the speed of sound in tissue.
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Ludwig Wensauer
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The wavelength must be
λ = (1/4) (1.6 cm) = 0.4 cm or 0.004 m
The frequency can be solved using the formula
f = v / λ
we are given with
v = 1500 m/s
Substituting the values
f = 1500 m/s / 0.004 m
f = 375000 /s or 375 kHz
Mannicken
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Jan 24, 2018
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Mannicken
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