Sonogram, Vascular,

reply to 2 students discussion board post
January 25, 2021
Project Analysis (BSHS/455)
January 25, 2021

Please answer only from attached files, not from online sources, Thnx

  1. Explain the Doppler Shift principle. What is the difference between a negative and a positive Doppler shift?
  2. Explain the process of how sound is produced in an US transducer and what causes the Doppler shift to occur.
  3. Explain the relationship between Doppler shift and Frequency shift.
  4. Explain the relationship between Frequency shift and Doppler angle.
  5. Explain the difference between the Doppler equation when solving for frequency versus velocity.
  6. Explain the difference between the transducer steering angle versus the angle of incidence.
  7. Explain the appropriate use of Angle Correct and how it affects the data.
  8. List the difference, advantages and disadvantages of CW Doppler versus PW Doppler.
  9. Explain how the sample volume or range gate size affects the transmitted pulse.
  10. Explain PRF and Nyquist limit.
  11. Explain how spectral Doppler is displayed using the FFT. Describe the components of the displayed Doppler waveform.
  12. Discuss the purpose of the different filters and how they can affect the spectral Doppler waveform and Color Doppler.
  13. Explain how color flow Doppler is displayed using Autocorrelation. Describe the components of the displayed color flow sample.
  14. In Color Doppler, describe the relationship between the pulses per scan line, packet size, ensemble length and scan line density to frame rate.
  15. Explain the significance of color box width to frame rate.
  16. Explain color coding in reference to the Doppler sound beam and vessel being evaluated.
  17. Explain the relationship between the amount of color flow displayed and the beam steering.
  18. List the differences between Power Doppler and color Doppler along with the advantages and disadvantages
  19. Describe the differences between axial resolution and lateral resolution
  20. Explain high PRF.

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