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1. a. Change in
Which variable caused the color change from blue to red of the vessel in
ves- sel
this image?
direction
a. Change in vessel direction
b. Color scale set too low
c. Turbulent flow
d. Severe stenosis
2. C. Twice the With harmonic imaging, how does echo frequency relate to transmitted
transmitted frequen- cy?
fre- quency A. Half the transmitted frequency
B. Equal to the transmitted frequency
C. Twice the transmitted frequency
D. Four times the transmitted frequency
3. A. Frequency To which acoustic variable is penetration depth inversely related?
A. Frequency
B. Wavelength
C. Period
D. Propagation speed
4. D. Time- Which control improves the ettects of attenuation?
gain
A. Dynamic range
compensatio
B. Pulse inversion
n
C. Multiple focal zones
D. Time-gain compensation
,ARDMS SPI PRACTICE TEST - FORM A & B
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5. A. Phasic Which term describes blood flow changes in response to respiration?
A. Phasic
, ARDMS SPI PRACTICE TEST - FORM A & B
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B. Parabolic
C. Spontaneous
D. Pulsatile
6. D. Thickness The center frequency of a transducer depends primarily upon which
characteristic of the crystal?
A. Width
B. Length
C. Spacing
D. Thickness
7. B. Ability to What is an advantage of using pulsed wave Doppler compared to
sam- ple
continuous wave Doppler?
depth
A. Higher echo sensitivity
B. Ability to sample depth
C. Decreased display of aliasing
D. Improved temporal resolution
8. A. 0 degrees Which Doppler angle to flow results in the greatest absolute Doppler shift?
A. 0 degrees
B. 15 degrees
C. 45 degrees
D. 60 degrees
9. D. Spatial Which term describes the averaging together of scan lines from
com-
multiple angles to create one image?
pounding
A. Harmonic imaging
B. Real-time three-dimensional imaging
C. Elastography
D. Spatial compounding