5

Chapter 5


Questions



  1. 81. The Doppler signal is consistent with:
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    1. A. Severe aortic regurgitation and moderate aortic stenosis
    2. B. Severe mitral stenosis
    3. C. Acute severe mitral regurgitation
    4. D. Ventricular septal defect

  2. 82. Pulse duration is affected by:

    1. A. Source of ultrasound
    2. B. B.Transmission medium
    3. C. Both
    4. D. Neither

  3. 83. The pulse repetition frequency (PRF) is affected by:

    1. A. Source of ultrasound
    2. B. Transmission medium
    3. C. Both
    4. D. Neither

  4. 84. What happens to the PRF when imaging depth is increased?

    1. A. Increases
    2. B. Decreases
    3. C. C.Does not change
    4. D. Effect is variable

  5. 85. By increasing the PRF, the axial resolution:

    1. A. A.Increases
    2. B. Decreases
    3. C. Does not change

  6. 86. Imaging at depth affects:

    1. A. Axial resolution
    2. B. Lateral resolution
    3. C. Neither
    4. D. Both

  7. 87. Reducing the transducer footprint will affect:

    1. A. Lateral resolution
    2. B. Temporal resolution
    3. C. Axial resolution
    4. D. None of the above

  8. 88. Increasing the transmit power will:

    1. A. Decrease sensitivity
    2. B. Increase lateral resolution
    3. C. Increase penetration
    4. D. None of the above

  9. 89. Acoustic impedance equals (rayls):

    1. A. Density in kg/m3 × speed of sound in m/s
    2. B. Density in kg/m3 × transducer frequency in MHz
    3. C. Depth in meters × transducer frequency in MHz
    4. D. None of the above

  10. 90. Reflection of sound at an interface is affected by:

    1. A. Specific acoustic impedance
    2. B. Transducer frequency
    3. C. Depth
    4. D. None of the above

  11. 91. The most common cause of coronary sinus dilatation is:

    1. A. Heart failure
    2. B. Persistent left superior vena cava
    3. C. Atrial septal defect
    4. D. None of the above

  12. 92. The following data were obtained from a 72-year-old man with a calcified aortic valve: left ventricular outflow tract (LVOT) velocity (V1) 0.8 m/s, transaortic velocity (V2) 4 m/s, LVOT diameter 2 cm. The calculated aortic valve area (AVA) is:

    1. A. 0.4 cm2
    2. B. 0.6 cm2
    3. C. 0.8 cm2
    4. D. 1 cm2

  13. 93. The continuity equation is an example of:

    1. A. Law of conservation of mass
    2. B. Law of conservation of energy
    3. C. Law of conservation of momentum
    4. D. None of the above

  14. 94. The most practical value for the development of perfluorocarbon bubbles was to improve:

    1. A. Contrast on the right side
    2. B. Stable passage through the transpulmonary bed to improve contrast on the left side
    3. C. Improve contrast visualization in the hepatic bed
    4. D. None of the above

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Jun 12, 2016 | Posted by in CARDIOLOGY | Comments Off on 5

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