Spatial resolution is determined by which of the following?
a. the number of bits per pixel
b. spatial pulse length
c. frame rate
d.the number of pixels per inch
e beam diameter Answer- d. the number of pixels per inch
Which of the following receiver functions cant be adjusted by the sonographer?
a. compensation
b. demodulation
c. compression
d. amplification
e. threshold Answer- b. demodulation
Which of the following transducers will have the shallowest focus?
a. high frequency, large diameter
b. high frequency, small diameter
c. low frequency, large diameter
d. low frequency, small diameter Answer- d. low frequency, small diameter
Enhancement artifact appears on an ultrasound scan. Which of the following statements
is true about the structure immediately above the artifact?
a. attenuation properties are too low
b. speed of sound is too high
c. speed of sound is too low
d. it is hypo echoic
e. there is too little absorption Answer- a. attenuation properties are too low
The image on an ultrasound system’s display is too bright. Which of the following
techniques is best to correct this problem?
a. decrease receiver gain
b. decrease reject
c. adjust time gain compensation
d. decrease output power
e. increase threshold Answer- d. decrease output power
A pulse is emitted by a transducer and is traveling in soft tissue. The go-return time, or
time-of-flight, of a sound pulse is 130 microseconds. What is the reflector depth?
a. 10 cm
b. 130 mm
1 / 2
c. 10 m
d. 10 mm
e. 13 cm Answer- a. 10 cm
How much time is required for a sound pulse to travel round trip to and from a reflector
that is 2 cm deep in soft tissue?
a. 26 ms
b. 26 us
c. 26 s
d. 0.26 s
e. 2 s Answer- b. 26 us
Which of the following terms does not belong with the others?
a. plug flow
b. layered flow
c. turbulent flow
d. parabolic flow
e. laminar flow Answer- c. turbulent flow
Which of these biologic tissues will sound waves propagate most quickly?
a. fat
b. amniotic fluid
c. tendon
d. lung
e. bood Answer- c. tendon
Which of the following is most likely to create cavitation?
a. high peak pressure and short wavelength
b. high peak rarefraction pressure and low frequency
c. high peak pressure and high frequency
d. low peak pressure and long wavelength Answer- b. high park rarefraction pressure
and low frequency
An ultrasound system is imaging to a depth of 10 cm. Which of the following will be
different on a single image at depths of 2cm, 5cm and 10 cm?
a. contrast resolution
b. temporal resolution
c. lateral resolution
d. axial resolution Answer- c. lateral resolution
Quality assurance studies should be performed
a. daily
b. weekly
c. routinely
d. 1 week prior to joint commission review
e. monthly Answer- c. routinely