Question
Asked Oct 26, 2019
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Ultrasound probes can resolve structural details with sizes approximately equal to the wavelength of the ultrasound waves themselves. What is the size of the smallest feature observable in human tissue when examined with
18-MHz
ultrasound? The speed of sound in human tissue is 1,540 m/s.

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Expert Answer

Step 1

Given,

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f18 MHz 18x 106 Hz v 1540 m/ sec

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Step 2

Ultrasound probe can resolve the tissue size equal to its wavelength and its can’t probe feature smaller than its wavelength, so size of smallest feature observable in human tissue is approximately equal to wavelength of sound,

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Wavelength of sound,2-

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Step 3

By substituting the ...

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1540 18x106 2 8.55x10 m 2 8.55x10 mm 0.085mm

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