ARDMS SPI EXAM QUESTIONS AND CORRECT ANSWERS

ARDMS SPI EXAM QUESTIONS AND
CORRECT ANSWERS
WhichA2gainA2willA2increaseA2theA2riskA2ofA2bioeffects?
a.A2transmit
b.A2receive
c.A2gain
d.A2overallA2gainA2-A2Ans--a.A2transmit

WhichA2ofA2theA2followingA2isA2consideredA2theA2memoryA2ofA2anA2ultrasoundA2instrument
?
a.A2pulser
b.A2transducer
c.A2receiver
d.A2beamA2former
e.A2digitalA2scanA2converter
f.A2displayA2monitorA2-A2Ans--e.A2digitalA2scanA2converter

SpectralA2broadeningA2suggest:
a.A2laminarA2flow
b.A2turbulentA2flow
c.A2flowA2awayA2fromA2theA2transducer
d.A2flowA2towardsA2theA2transducerA2-A2Ans--b.A2turbulentA2flow

WithA2pulseA2waveA2DopplerA2axialA2resolution:A2-A2Ans--degrades

WhatA2colorA2isA2usuallyA2useA2inA2colorA2flowA2DopplerA2varianceA2mapA2toA2indicateA2tur
bulentA2flow?A2-A2Ans--green

DopplerA2highA2passA2filterA2eliminates:A2-A2Ans--
highA2amplitudeA2signals;A2lowA2velocityA2flow

TheA2DopplerA2wallA2filterA2isA2consideredA2a:A2-A2Ans--highA2passA2filter

TheA2NyquistA2LimitA2isA2equalA2to:
a.A2propagationA2speedA2xA2frequency
b.A2propagationA2speed/A2wavelength
c.A2PRF/2
d.A24xV^2A2-A2Ans--c.A2PRF/2

MultipleA2echoes,A2equallyA2spacedA2originatingA2fromA2aA2gasA2bubbleA2isA2called:
a.A2cometA2tail
b.A2ringA2down
c.A2sliceA2thicknessA2artifact
d.A2multipathA2-A2Ans--b.A2ringA2down

, AnA2increaseA2inA2redA2bloodA2cellA2velocityA2will_____A2theA2DopplerA2Shift:
a.A2increase
b.A2decrease
c.A2notA2change
d.A2cannotA2beA2predictedA2-A2Ans--a.A2increase

TheA2primaryA2advantageA2ofA2CWA2DopplerA2is:
a.A2rangeA2resolution
b.A2rangeA2discrimination
c.A2rangeA2ambiguity
d.A2rangeA2gating
e.A2absenceA2ofA2samplingA2rateA2-A2Ans--e.A2absenceA2ofA2samplingA2rate

TheA2rangeA2forA2ultrasoundA2begins:
a.A220A2Hz
b.A220,000A2Hz
c.A22A2MHz
d.A215A2MHzA2-A2Ans--
b.A220,000A2HzA2(usefulA2frequencyA2rangeA2forA2clinicalA2imagingA2isA22MHz-10MHz)

WhichA2instrumentA2controlA2affectsA2theA2amplitudeA2(dB)A2ofA2theA2outgoingA2signal:
a.A2gain
b.A2receiverA2gain
c.A2TGC
d.A2transmitA2gain
e.A2overallA2gainA2-A2Ans--
d.A2transmitA2gain;A2amplitudeA2canA2beA2affectedA2byA2theA2sonographer

WhichA2ofA2theA2followingA2isA2usedA2toA2convertA2DopplerA2shiftA2informationA2intoA2color:
a.A2highA2PRF
b.A2fastA2FourierA2transform
c.A2autocorrelation
d.A2timeA2intervalA2histogramA2-A2Ans--c.A2autocorrelation
bA2isA2incorrectA2becauseA2fastA2FourierA2transformA2isA2theA2methodA2usedA2toA2processA
2conventionalA2DopplerA2shiftA2informationA2butA2isA2tooA2slowA2aA2methodA2forA2colorA2Do
ppler

PulseA2repetitionA2frequencyA2-A2Ans--
NumberA2ofA2pulsesA2thatA2anA2ultrasoundA2systemA2transmitsA2intoA2theA2bodyA2eachA2se
cond.A2Hz.A2TypicallyA24-
15A2KHz.A2PRFA2andA2depthA2ofA2aA2viewA2areA2inverselyA2related:A2WhenA2systemA2isA2i
magingA2deeper,A2theA2pulseA2repetitionA2frequencyA2isA2lower.
AlsoA2theA2numberA2ofA2pulsesA2createdA2eachA2second