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Ultrasonic Waves Properties

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Questions and Answers

What frequency range is typically used for medical imaging with ultrasound?

20 to 200 MHz

20 to 200 kHz

2 to 20 kHz

2 to 20 MHz (correct)

How does the frequency of ultrasound waves affect resolution and penetration?

Higher frequency degrades resolution but improves penetration

Higher frequency degrades resolution and penetration

Higher frequency improves resolution and penetration

Higher frequency improves resolution but reduces penetration (correct)

What is the speed of sound in a material dependent on?

Volume and temperature of the material

Density and compressibility of the material (correct)

Density and temperature of the material

Volume and compressibility of the material

How is frequency measured in ultrasound waves?

As the number of wavelengths per second Signup and view all the answers

What happens to penetration as ultrasound frequency increases?

Penetration decreases with higher frequency Signup and view all the answers

What is the range of ultrasound pulse frequency typically used in medical imaging?

(2-20) MHz Signup and view all the answers

What determines the frequency of ultrasound pulses in diagnostic ultrasound equipment?

The crystal material within the transducer Signup and view all the answers

How do high frequency ultrasound pulses affect image quality and penetration depth?

Produce higher quality images but cannot penetrate deeply Signup and view all the answers

Why is the crystal material within the transducer of diagnostic ultrasound equipment described as piezoelectric?

It deforms when electricity is applied to it Signup and view all the answers

What effect does applying a single electrical pulse to the crystal within the transducer have?

It causes the crystal to vibrate, creating an ultrasound pulse Signup and view all the answers

Why is it necessary to carefully select the ultrasound frequency for diagnostic procedures?

To balance image detail and depth of penetration Signup and view all the answers

How can the ultrasound frequency be adjusted in diagnostic ultrasound equipment?

By changing transducers with different resonant frequencies Signup and view all the answers