ARDMS SPI EXAM WITH UPDATED,REVIEWED QUESTIONS AND
CORRECT, VERIFIED ANSWERS GRADED A+!!!
Pulse repetition frequency
Number of pulses that an ultrasound system transmits into the body each second.
Hz. Typically 4-15 KHz. PRF and depth of a view are inversely related: When
system is imaging deeper, the pulse repetition frequency is lower.
Also the number of pulses created each second
The best way to increase the near field length of an ultrasound beam is to:
increase transducer diameterWhich gain will increase the risk of bioeffects?
a. transmit
b. receive
c. gain
d. overall gain
a. transmit
Which of the following is considered the memory of an ultrasound
instrument?
a. pulser
b. transducer
c. receiver
d. beam former
e. digital scan converter
f. display monitor
e. digital scan converter
Spectral broadening suggest:
a. laminar flow
b. turbulent flow
c. flow away from the transducer
d. flow towards the transducer
b. turbulent flow
, With pulse wave Doppler axial resolution:
degrades
What color is usually use in color flow Doppler variance map to indicate
turbulent flow?
green
Doppler high pass filter eliminates:
high amplitude signals; low velocity flow
The Doppler wall filter is considered a:
high pass filter
The Nyquist Limit is equal to:
a. propagation speed x frequency
b. propagation speed/ wavelength
c. PRF/2
d. 4xV^2
c. PRF/2
Multiple echoes, equally spaced originating from a gas bubble is called:
a. comet tail
b. ring down
c. slice thickness artifact
d. multipath
b. ring down
An increase in red blood cell velocity will_____ the Doppler Shift:
a. increase
b. decrease
c. not change
d. cannot be predicted
a. increase
CORRECT, VERIFIED ANSWERS GRADED A+!!!
Pulse repetition frequency
Number of pulses that an ultrasound system transmits into the body each second.
Hz. Typically 4-15 KHz. PRF and depth of a view are inversely related: When
system is imaging deeper, the pulse repetition frequency is lower.
Also the number of pulses created each second
The best way to increase the near field length of an ultrasound beam is to:
increase transducer diameterWhich gain will increase the risk of bioeffects?
a. transmit
b. receive
c. gain
d. overall gain
a. transmit
Which of the following is considered the memory of an ultrasound
instrument?
a. pulser
b. transducer
c. receiver
d. beam former
e. digital scan converter
f. display monitor
e. digital scan converter
Spectral broadening suggest:
a. laminar flow
b. turbulent flow
c. flow away from the transducer
d. flow towards the transducer
b. turbulent flow
, With pulse wave Doppler axial resolution:
degrades
What color is usually use in color flow Doppler variance map to indicate
turbulent flow?
green
Doppler high pass filter eliminates:
high amplitude signals; low velocity flow
The Doppler wall filter is considered a:
high pass filter
The Nyquist Limit is equal to:
a. propagation speed x frequency
b. propagation speed/ wavelength
c. PRF/2
d. 4xV^2
c. PRF/2
Multiple echoes, equally spaced originating from a gas bubble is called:
a. comet tail
b. ring down
c. slice thickness artifact
d. multipath
b. ring down
An increase in red blood cell velocity will_____ the Doppler Shift:
a. increase
b. decrease
c. not change
d. cannot be predicted
a. increase
