ULTRASOUND PHYSICS - MOCK EXAM QUESTIONS FOR SPI QUESTIONS AND CORRECT ANSWERS

ULTRASOUND PHYSICS - MOCK EXAM
QUESTIONS FOR SPI QUESTIONS AND
CORRECT ANSWERS
WhichA2ofA2theA2followingA2transducersA2willA2haveA2theA2worstA2axialA2resolution?
a.A2VectorA2array,A23A2MHz
b.A2LinearA2SequentialA2Array,A26A2MHZ
c.A2LinearA2PhasedA2ArrayA27.5A2MHZ
d.A2AnnularA2Array,A26A2MHzA2-A2Ans--VectorA2array,A23A2MHz

AA2soundA2waveA2isA2travelingA2inA2theA2bodyA2andA2propagatesA2fromA2muscleA2toA2air.A2
WhatA2percentageA2ofA2theA2soundA2waveA2isA2mostA2likelyA2reflectedA2atA2theA2muscle-
airA2boundary?
a.A20.5%
b.A275%
c.A225%
d.A25%
e.A299%A2-A2Ans--75%

WhichA2ofA2theA2followingA2listsA2isA2inA2decreasingA2order?
a.A2mega,A2kilo,A2deca,A2milli,A2nano
b.A2centi,A2mill,A2kilo,A2mega,A2nano
c.A2micro,A2milli,A2deci,A2kilo,A2mega
d.A2micro,A2kilo,A2mega,A2deci,A2milli
e.A2mega,A2micro,A2deci,A2milli,A2hectoA2-A2Ans--mega,A2kilo,A2deca,A2milk,A2nano

DuringA2aA2diagnosticA2exam,A2whichA2ofA2theseA2statementsA2isA2mostA2correctA2whenA2d
escribingA2theA2pulsedA2echoA2characteristicsA2ofA2anA2ultrasoundA2system.
a.A2TheA2listeningA2timeA2mayA2beA2one-
thousandA2timesA2longerA2thanA2theA2pulseA2duration.
b.A2theA2pulseA2durationA2isA2longerA2thanA2theA2pulseA2repetitionA2period.
c.A2TheA2pulseA2durationA2isA2similarA2toA2theA2listeningA2time.
d.A2TheA2dutyA2factorA2hasA2aA2valueA2closeA2toA21
e.A2TheA2pulseA2repititionA2periodA2isA2similarA2toA2theA2period.A2-A2Ans--
TheA2listeningA2timeA2mayA2beA2one-
thousandA2timesA2longerA2thanA2theA2pulseA2duration.

WhichA2ofA2theA2followingA2parametersA2isA2determinedA2byA2bothA2theA2ultrasoundA2syste
mA2andA2theA2mediumA2throughA2whichA2theA2soundA2travels?
a.A2period
b.A2frequency
c.A2temperature
d.A2wavelength
e.A2velocityA2ofA2theA2soundA2-A2Ans--wavelength

,YouA2shouldA2beA2familiarA2withA2theA2formulaA2L=A2C/F.
WhatA2doesA2"C"A2standA2forA2inA2thisA2equation?
a.A2characteristicA2impedence
b.A2density
c.A2compliance
d.A2compressability
e.A2propagationA2speedA2-A2Ans--propagationA2speed

WhichA2ofA2theA2followingA2listsA2isA2inA2increasingA2order?
a.A2mega,A2kilo,A2milli,A2nano,A2centi
b.A2centi,A2milli,A2kilo,A2mega,A2nano
c.A2micro,A2kilo,A2milli,A2deci,A2mega
d.A2micro,A2milli,A2deci,A2kilo,A2mega
e.A2mega,A2micro,A2deci,A2mill,A2hectoA2-A2Ans--micro,A2milli,A2deci,A2kilo,A2mega

WhichA2ofA2theA2followingA2statementsA2aboutA2speedA2andA2attenuationA2areA2true?

a.A2AttenuationA2throughA2andA2propagationA2speedA2inA2aA2particularA2mediumA2areA2unr
elatedA2toA2eachA2other.
b.A2WhenA2aA2soundA2beamA2travelsA2fasterA2inA2aA2medium,A2theA2attenuationA2isA2less.
c.A2WhenA2aA2soundA2beamA2travelsA2slowerA2inA2aA2medium,A2theA2attenuationA2isA2more
.A2-A2Ans--
AttenuationA2throughA2andA2propagationA2speedA2inA2aA2particularA2mediumA2areA2unrelat
edA2toA2eachA2other.

AA2sonographerA2isA2scanningA2aA2patientA2withA2aA23A2MHzA2probeA2andA2replacesA2itA2wi
thA2aA26A2MHzA2probe.A2AllA2ofA2theA2followingA2statementsA2areA2FALSE,A2except:
a.A2TheA26A2MHzA2beamA2willA2travelA2atA2aA2lowerA2speedA2thanA2theA23A2MHzA2beam
b.A2TheA26A2MHzA2beamA2willA2travelA2fasterA2thanA2theA23A2MHzA2beam
c.A2TheA23A2MHzA2beamA2willA2haveA2aA2higherA2frequencyA2thanA2theA26A2MHzA2beam
d.A2TheA26A2MHZA2beamA2willA2haveA2aA2longerA2periodA2thanA2theA23A2MHzA2beam
e.A2TheA23A2MHzA2beamA2willA2haveA2aA2longerA2wavelengthA2thanA2theA26A2MHzA2beamA2
-A2Ans--
TheA23A2MHzA2beamA2willA2haveA2aA2longerA2wavelengthA2thanA2theA26A2MHzA2beam

RankA2theA2followingA2mediaA2inA2increasingA2orderA2ofA2propagationA2speed.
a.A2muscle,A2liver,A2fat,A2bone,A2lung
b.A2air,A2lung,A2fat,A2softA2tissue,A2bone
c.A2bone,A2muscle,A2fat,A2lung,A2air
d.A2air,A2fat,A2bone,A2blood,A2water
e.A2liver,A2kidney,A2fat,A2muscle,A2brainA2-A2Ans--air,A2lung,A2fat,A2softA2tissue,A2bone

WhichA2ofA2theA2followingA2intensitiesA2isA2mostA2significantA2withA2regardA2toA2theA2studyA
2ofA2bioeffects?
a.A2SATP

, b.A2SATA
c.A2SAPA
d.A2SPTA
e.A2SPTPA2-A2Ans--SPTA

WhichA2ofA2theA2followingA2termsA2doesA2notA2belongA2withA2theA2others?
a.A2decreasedA2depthA2ofA2view
b.A2increasedA2pulseA2duration
c.A2increasedA2pulseA2repititionA2frequency
d.A2decreasedA2pulseA2repititionA2period
e.A2highA2dutyA2factorA2-A2Ans--increasedA2pulseA2duration

WhatA2isA2aA2cyclicalA2regionA2ofA2lowA2densityA2called?
a.A2compression
b.A2Pascal
c.A2rarefaction
d.A2density
e.A2impedenceA2-A2Ans--rarefaction

AA2sonographerA2adjustsA2theA2outoutA2ofA2anA2ultrasoundA2systemA2byA2increasingA2theA2
amplitudeA2byA2aA2factorA2ofA2three.A2WhichA2ofA2theA2followingA2statementsA2isA2true?
a.A2powerA2isA2increasedA2byA2aA2factorA2ofA2three
b.A2wavelengthA2isA2increasedA2byA2aA2factorA2ofA2nine
c.A2powerA2isA2increasedA2byA2aA2factorA2ofA2nine
d.A2frequencyA2inA2increasedA2byA2aA2factorA2ofA2three
e.A2periodA2isA2decreasedA2byA2aA2factorA2ofA2threeA2-A2Ans--
powerA2isA2increasedA2byA2aA2factorA2ofA2nine

SoundA2travelsA2atA2theA2sameA2velocityA2inA2twoA2differentA2media.A2TheA2densityA2ofA2M
ediumA2AA2isA2halfA2thatA2ofA2MediumA2B.A2WhichA2ofA2theA2followingA2statementsA2isA2true
:
a.A2TheA2impedenceA2ofA2MediumA2AA2isA2fourA2timesA2thatA2ofA2MediumA2B
b.A2TheA2Reynold'sA2numberA2ofA2MediumA2AA2isA2twiceA2thatA2ofA2MediumA2B
c.A2TheA2impedenceA2ofA2MediumA2AA2isA2twiceA2thatA2ofA2MediumA2B
d.A2TheA2resistiveA2indexA2ofA2MediumA2AA2isA2twiceA2thatA2ofA2MediumA2B
e.A2TheA2impedenceA2ofA2MediumA2AA2isA2halfA2thatA2ofA2MediumA2BA2-A2Ans--
TheA2impedanceA2ofA2MediumA2AA2isA2halfA2thatA2ofA2MediumA2B

WhichA2ofA2theA2followingA2mechanismsA2areA2notA2relatedA2toA2attenuation?
a.A2reflection
b.A2scattering
c.A2transmission
d.A2absorption
e.A2tissueA2heatingA2-A2Ans--transmission

InA2whichA2ofA2theA2followingA2isA2theA2velocityA2ofA2soundA2theA2lowest?