ARDMS SPI Exam Review TEST 19

October 28, 2017 By Rana Waqar Leave a Comment

1. Which signal processing technique used for color Doppler is not as accurate, but faster, than the technique used for spectral Doppler?
- a. Zero crossing
- b. Phase quadrature
- c. Autocorrelation
- d. Fast Fourier transform
2. What is the fewest number of crystals a PW Doppler device may have?
- a. Zero
- b. One
- c. Two
- d. Three
3. Which type of Doppler does not rely on the frequency shift but instead relies on the strength of the shift?
- a. Spectral Doppler
- b. Power Doppler
- c. Color Doppler imaging
- d. CW Doppler
4. What is it called when the 2D image, color Doppler image, and spectral Doppler are displayed simultaneously?
- a. Duplex mode
- b. Triplex mode
- c. Phase quadrature mode
- d. Multiplex mode
5. What is the duty factor of CW Doppler?
- a. 1
- b. 100
- c. 0.01
- d. 1%
6. Which of the following is true about CW Doppler?
- a. The measured frequency shifts come from a user-selected depth
- b. A range gate is placed in the vessel to be sampled
- c. There is a large sample volume that obtains signals from all vessels
- within d. Pulses of sound are sent into the tissue to measure the frequency shifts
7. When compared to 2D grayscale imaging, which of the following color Doppler statements is true?
- a. There is improved temporal resolution
- b. There is worse temporal resolution
- c. There are fewer pulses per scan line
- d. There is a higher frame rate
8. Which of the following statements is false?
- a. Aliasing does not occur with color Doppler
- b. Continuous-wave Doppler is able to measure very high frequency shifts
- c. Pulsed-wave Doppler has range resolution
- d. Power Doppler is not limited by 90° angle
9. Which of the following frequency shifts would exhibit aliasing if the PRF is 5000 Hz?
- a. 1.0 kHz
- b. 2.5 kHz
- c. 3.0 kHz
- d. None of the above
10. Which of the following is true about the frequency shift?
- a. It increases with an increase in Doppler angle
- b. It is typically greater than 20,000 Hz
- c. It is inversely related to operating frequency
- d. It is in the audible range of sound

Δ

For More questions please join Our facebook group:
https://www.facebook.com/groups/249298882082586/?ref=br_rs

Reader Interactions

Primary Sidebar

Search

Search the site ...

Reader Interactions

Leave a Reply Cancel reply