Chapter 5 Test

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1. The loss of ultrasound amplitude or intensity is:
2. Which of the following is not a component of attenuation?
3. Which of the following are not factors which cause reflection of ultrasound?
4. A change in direction of wave propagation when crossing a boundary is called:
5. Echoes appearing brighter than the surrounding tissue are called:
6. Acoustic Impedance is equal to:
7. This occurs when an ultrasound beam strikes reflectors are smaller than the wavelength:
8. Refraction can be described by this law:
9. Which of the statements concerning contrast imaging are incorrect?
10. Harmonics