EDELMAN SPI COMPREHENSIVE EXAM NEWEST ACTUAL
EXAM COMPLETE ALL QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY GRADED
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The dynamic range is the ratio of the smallest to the largest ____ that a system
can process without distortion
amplitude
frequency
phase delay
spatial length - ANSWER-amplitude
When may a patient revoke their consent to be treated?
at any time
when it is safe to terminate the procedure
never - ANSWER-at any time
If intensity is increased by 3dB, it:
doubles
triples
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, Edelman SPI Comprehensive Exam NEWEST ACTUAL EXAM
halved
quartered - ANSWER-doubles
What determines the frequency of a sound beam from a pulsed transducer?
voltage applied to the PZT
PZT thickness
frequency of the system
PRF of the pulser - ANSWER-Pzt thickness
While propagating, a sound wave is refracted. Finally, it returns to the transducer.
The system processes the sound wave as if it has:
refracted and returned
traveled in a straight line, reflected and returned
traveled in a straight line, attenuated, reflected & returned - ANSWER-traveled in a
straight line, reflected and returned
What measures the output of a transducer?
receiver
display
hydrometer
hydrophone - ANSWER-hydrophone
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, Edelman SPI Comprehensive Exam NEWEST ACTUAL EXAM
The impedance of tissue is3*10^5 rayls and for the PZT crystal is 6*10^6 rayls.
What is the best impedance for the matching layer?
36*10^6
3,00
10,000
9.5*10^5
9*10^4 - ANSWER-9*10^4
Put in increasing order of propagation speed:
air, bone, water
bone, water, air
air, water bone
water, air, bone
bone, air, water - ANSWER-water, air, bone
Which type of artifact appears most commonly with highly reflective object?
reverberations
mirroring
shadowing
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, Edelman SPI Comprehensive Exam NEWEST ACTUAL EXAM
enhancement
defocusing - ANSWER-shadowing
What can pulsed Doppler measure that continuous wave cannot?
duration
speed
velocity
location
frequency - ANSWER-location
What is the fraction of time that a transducer is transmitting?
duty factor
pulse duration
period
PRF spatial duration - ANSWER-duty factor
Which of the following clinical modalities has the lowest output intensity?
pulsed Doppler
continuous wave Doppler
power Doppler
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