Exam (elaborations)
ESP X-ZONE PRACTICE TEST QUESTIONS AND ANSWERS
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ESP X-ZONE PRACTICE TEST QUESTIONS AND ANSWERS
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All of the following are limitations of analog scan converters EXCEPT:
a. instability
b. image fade
c. image deterioration over time
d. low spatial resolution
e. image flicker
Give this one a try later!
, d. low spatial resolution
A sound wave with a frequency of 5 MHz is travelling in soft tissue. What is the
wavelength of this sound?
a. 0.3mm
b. 5mm
c. 0.5mm
d. 0.3cm
e. 0.5m
Give this one a try later!
a. 0.3mm
Which of the following choices best describes axial resolution artifact?
a. two reflectors positioned one in front of the other appears as one reflection on the
image
b. two reflectors positioned side-by side appears as one reflection on the image
c. a hypoechoic region extending laterally along the focal zone
d. a second copy of a true reflector appears deeper than the true reflector
Give this one a try later!
a. two reflectors positioned one in front of the other appears as one
reflection on the image
Which of the following best describes a sound beam?
a. a collection mechanical vibrations in the form of compressions and rarefactions
b. electromechanical variations
,c. a wave that man can hear
d. ionic vibrations
e. electrical impulses
Give this one a try later!
a. a collection mechanical vibrations in the form of compressions and
rarefactions
An ultrasound system is set at 0 dB and is transmitting at full intensity. What is the
output power when the system is transmitting at 50% of full intensity?
a. -10 dB
b. -50 dB
c. -3 dB
d. 3 dB
e. 10 dB
Give this one a try later!
c. -3 dB
An individual is standing. The blood pressure generated by the heart is 120 mmHg.
What pressure will be measured at the ankle?
a. 220 mmHg
b. 100 mmHg
c. 120 mmHg
d. 400 mmHg
e. 20 mmHg
Give this one a try later!
, a. 220 mmHg
Which of the following factors has the greatest influence on temporal resolution?
a. output power and frequency
b. frequency of sound and the propagation speed of sound in the medium
c. propagation speed of sound in the medium and the imaging depth
d. wavelength of sound and propagation speed in the medium
Give this one a try later!
c. propagation speed of sound in the medium and the imaging depth
What does a hydrophone measure?
a. attenuation of sound in soft tissue.
b. dynamic range of an ultrasound imaging system
c. receiver gain of an amplifier
d. acoustic output of an ultrasound imaging system
e. doppler frequency of a pulsed wave system
Give this one a try later!
d. acoustic output of an ultrasound imaging system
What is the maximum number of shades of gray that can be represented by 5 bits?
a. 5 shades
b. 10 shades
c. 128 shades
d. 64 shades
e. 32 shades
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