ARDMS SPI Exam Review TEST 20

October 28, 2017 by Rana Waqar Leave a Comment

1. What can be said about the ensemble length of pulsed-wave Doppler?
- a. It is less than 3 pulses per scan line
- b. It is more than 100 pulses per scan line
- c. It is about 10 to 20 pulses per scan line
- d. It is typically 0
2. What happens if blood flow is sampled in the center of laminar flow?
- a. There will be a higher velocity than if sampled toward the edges
- b. There will be a slower velocity than if sampled toward the edges
- c. It will be made up of many different velocities
- d. It will be turbulent
3. Which of the following is false about color Doppler imaging?
- a. It is prone to aliasing
- b. It obtains mean velocity information
- c. It uses autocorrelation as its signal processing technique
- d. It can measure peak systolic and end diastolic velocities
4. Which of the following is a property of power Doppler?
- a. Able to obtain velocity information and direction of flow
- b. Signal is obtained by detecting amplitude of shift
- c. It is prone to aliasing
- d. Limited by perpendicular angle of incidence
5. Assuming flow is constant, what happens in a region of blood vessel narrowing?
- a. There is a significant pressure increase
- b. There is an increase in the velocity along with a corresponding increase in pressure
- c. There is an increase in the velocity along with a corresponding decrease in pressure
- d. Velocity and pressure are unchanged
6. Which of the following is true about the spectral Doppler envelope?
- a. It is thin when there are many different velocities
- b. It is thin with CW Doppler
- c. It is thickened in the center of a laminar flow vessel
- d. It is thickened in the presence of turbulence
7. What is the term for the pressure difference between the inside of a vein and the tissue outside?
- a. Hydrostatic pressure
- b. Autocorrelation
- c. Transmural pressure
- d. Kinetic energy
8. A proximal stenosis will look like what on the spectral waveform?
- a. Reversal of flow in diastole
- b. Delay in the systolic upstroke
- c. Triphasic waveform
- d. Aliasing
9. The end diastolic component is missing on a spectral waveform. Which of the following should be adjusted to fix this?
- a. Gain
- b. Scale
- c. Wall filter
- d. Frequency
10. In the exercising patient, the distal arterioles are dilated. What type of flow pattern would most likely be demonstrated on spectral Doppler within the proximal vessels?
- a. Monophasic
- b. Biphasic
- c. Triphasic
- d. Venous

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