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2024 VERIFIED ARDMS SPI EXAM WITH CORRECT ANSWERS
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2024 VERIFIED ARDMS SPI EXAM WITH CORRECT ANSWERS
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2024 VERIFIED ARDMS SPI EXAMWITH CORRECT ANSWERS
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 - CORRECT-ANSWERSe. digital scan converter
The most common type of transducer used in echo is: - CORRECT-
ANSWERSsector phased array
Which gain will increase the risk of bioeffects?
a. transmit
b. receive
c. gain
d. overall gain - CORRECT-ANSWERSa. transmit
Decibels are the units for all of the following except:
a. amplitude
b. transmit gain
c. gain
d. attenuation
e. TGC
f. dynamic range
e. intensity - CORRECT-ANSWERSe. intensity= mW/cm2
What are the four acoustic variables: - CORRECT-ANSWERS1. temperature,
density, particle motion, pressure
Frequency is - CORRECT-ANSWERSCycles per second (Hz)
not affected by sonographer
increase frequency; decrease depth
Pulse duration - CORRECT-ANSWERSperiod (ms) x # of cycles in a pulse
Wavelength - CORRECT-ANSWERSthe length of one cycle
wavelength= propagation speed/ frequency
1.54/3MHz= .5mm
, An increase in packet size will _______ the frame rate - CORRECT-
ANSWERSDecrease
The range for audible sound is: - CORRECT-ANSWERS20 Hz- 20kHz
The wavelength of a 1MHz transducer is: - CORRECT-ANSWERS1.54/1=
1.54mm
The average speed of sound in soft tissue is: - CORRECT-ANSWERS1540m/s;
1.54km/s; 1.54mm/us
An increase in overall gain will result in all of the following except:
a. increase in image brightness
b. increase in output power
c. increase in amplification of the returning signal
d. decrease risk in bioeffects - CORRECT-ANSWERSb. increase in power
Reject eliminates: - CORRECT-ANSWERSlow amplitude signals
There have been no proven biological effects for unfocused transducers for
intensities below: - CORRECT-ANSWERS100mW/cm2 SPTA
The primary cause of attenuation of ultrasound in soft tissue is caused by: -
CORRECT-ANSWERSabsorption
Resolution artifact - CORRECT-ANSWERSWhen two structures parallel to the
ultrasound beam are displayed as one reflector.
Damping does not decrease: - CORRECT-ANSWERSbandwidth
Spectral Broadening - CORRECT-ANSWERSThe widening of the doppler shift
spectrum. Meaning the increase of the range of doppler shift frequencies
present, owing to a broader range of flow speeds encountered by the sound
beam.
Refraction - CORRECT-ANSWERSChange in direction of a wave when it
changs speed as in travels from one material to another. The change in the
direction of sound as it crosses a boundary.
autocorrelation - CORRECT-ANSWERSused to convert Doppler shift
information into color.
PRF - CORRECT-ANSWERSPulse Repetition Frequency. The rate at which
pulses are transmitted, given in hertz or pulses per second; reciprocal of
pulse-repetition time.
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