SPI

SPI practice questions, page 4 of 5, with answer review and explanations.

Question 16

A Doppler shift is 10,000 Hz at an angle of flow of 60 degrees. What is the Doppler shift at 0 degrees?

  1. 20,000 Hz
  2. 10,000 Hz
  3. 5,000 Hz
  4. 2,500 Hz

Question 17

Which target group is used to evaluate transverse distance measurement accuracy in this tissue-mimicking phantom image?

  1. A
  2. B
  3. C
  4. D

Question 18

Which type of display process rescans only the region of interest and improves resolution?

  1. Read magnification
  2. Write magnification
  3. Spatial compounding
  4. Frequency compounding

Question 19

What happens to the amount of attenuation if the path length is doubled?

  1. Quadrupled
  2. Doubled
  3. Halved
  4. Quartered

Question 20

How is intensity of an ultrasound beam measured?

  1. Hydrophone
  2. Doppler equation
  3. Autocorrelation
  4. Reynold's number