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The thinner the piezoelectric crystal, the higher the resona…

The thinner the piezoelectric crystal, the higher the resonant frequency that may be created.

Published April 23, 2025
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Ultrasound is a transverse, mechanical wave.

Ultrasound is a transverse, mechanical wave.

Published April 23, 2025
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In order to increase the ultrasound imaging frame rates, the…

In order to increase the ultrasound imaging frame rates, the line density needs to be increased.

Published April 23, 2025
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Artifacts may appear in ultrasound images when reverberation…

Artifacts may appear in ultrasound images when reverberations occur.

Published April 23, 2025
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A wave with a frequency between about 20 and 20,000 Hz is a…

A wave with a frequency between about 20 and 20,000 Hz is a sound wave that is audible to the human ear.

Published April 23, 2025
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An ultrasonic beam propagates from medium 1 into medium 2. I…

An ultrasonic beam propagates from medium 1 into medium 2. If the incident angle is smaller than the refraction angle, the sound velocity in medium 1 is higher than that in medium 2.

Published April 23, 2025
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When an ultrasound beam propagates from medium 1 into medium…

When an ultrasound beam propagates from medium 1 into medium 2, it has 50% reflection. Assume medium 1 has an acoustic impedance of 1 MRayl. The impedance of medium 2 is:

Published April 23, 2025
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The main reason of using ultrasound gel between a scanner an…

The main reason of using ultrasound gel between a scanner and the skin is to allow the scanner to move smoothly on the skin.

Published April 23, 2025
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Who usually elects the Board of Directors for a corporation?…

Who usually elects the Board of Directors for a corporation? 

Published April 23, 2025
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When a corporation sells stock to the public it is first don…

When a corporation sells stock to the public it is first done through what mechanism?

Published April 23, 2025
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