QUIZ 2
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Questions and Answers

Which of the following is true about the angle of insonation and color display?

  • When the flow is parallel to the beam, there is a reduced or absent color display.
  • When the flow is perpendicular to the beam, there is a reduced or absent color display.
  • When the flow is perpendicular to the beam, there is an improved color display.
  • When the flow is parallel to the beam, there is an improved color display. (correct)

    • During inspiration, what happens to the pressure in the thoracic cavity?

  • It increases.
  • It decreases. (correct)
  • It fluctuates.
  • It remains the same.

    • What effect does inspiration have on venous return to the heart from the upper body?

  • It decreases.
  • It remains the same.
  • It fluctuates.
  • It increases. (correct)

    • What effect does inspiration have on flow in the lower extremities?

    <p>It decreases.</p> Signup and view all the answers

    What is responsible for moving flow through the venous system?

    <p>Respiration and muscle contraction.</p> Signup and view all the answers

    What effect does expiration have on intrathoracic pressure?

    <p>It increases.</p> Signup and view all the answers

    What effect does expiration have on venous return to the heart from the upper body?

    <p>It decreases.</p> Signup and view all the answers

    What effect does expiration have on flow in the lower extremities?

    <p>It remains the same.</p> Signup and view all the answers

    What does the image processor in ultrasound do?

    <p>Performs preprocessing, postprocessing, persistance, pixel interpolation functions.</p> Signup and view all the answers

    What happens to the image data once preprocessing is changed?

    <p>It is permanently changed for all upcoming images.</p> Signup and view all the answers

    Which term is used to describe the number of pulses per scan line in ultrasound imaging?

    <p>Packet Size</p> Signup and view all the answers

    What is the typical range for packet size in ultrasound imaging?

    <p>3-32</p> Signup and view all the answers

    How does increasing packet size affect frame rate and temporal resolution?

    <p>Decreases frame rate and decreases temporal resolution</p> Signup and view all the answers

    In which case is it beneficial to have a high packet size in ultrasound imaging?

    <p>Testicular torsion detection</p> Signup and view all the answers

    What is the purpose of parallel processing in ultrasound imaging?

    <p>To improve frame rate and temporal resolution</p> Signup and view all the answers

    What is the function of autocorrelation in ultrasound imaging?

    <p>To automatically correlate data from multiple sampling sites</p> Signup and view all the answers

    How does increasing the Doppler PRF affect the color scale settings in ultrasound imaging?

    <p>Increases the color scale settings</p> Signup and view all the answers

    What effect does increasing the angle of insonation have on the amount of color displayed in ultrasound imaging?

    <p>Decreases the amount of color displayed</p> Signup and view all the answers

    What is the minimum number of pulses per scan line required for processing and displaying color in ultrasound imaging?

    <p>3</p> Signup and view all the answers

    What is the main limitation of velocity measurement accuracy in autocorrelation-based Doppler ultrasound imaging?

    <p>Angle correction is not utilized</p> Signup and view all the answers

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