URR SPI QUESTIONS AND CORRECT ANSWERS

URR SPI QUESTIONS AND CORRECT
ANSWERS
giveA2theA2correctA2unitsA2forA2each:
circumference:
area:
volume:A2-A2Ans--circumference:A2cm
area:A2cmA2squaredA2(cm^2)
volume:A2cmA2cubedA2(cm^3)

whenA2PRPA2increases,A2frameA2rateA2....A2-A2Ans--increases

periodA2XA2numberA2ofA2cyclesA2inA2aA2pulseA2=A2-A2Ans--pulseA2duration

2DA2imagingA2isA2bestA2whenA2theA2beamA2isA2atA2aA2___A2degreeA2angleA2toA2theA2structu
reA2-A2Ans--90A2degree

DopplerA2evaluationA2isA2bestA2whenA2theA2flowA2isA2atA2aA2____A2degreeA2angleA2toA2theA
2ultrasoundA2beamA2(cursor)A2-A2Ans--0A2degree


ifA2youA2increaseA2theA2beamA2frequency,A2thenA2yourA2spatialA2pulseA2lengthA2getsA2___
____A2(shorterA2orA2longer)A2-A2Ans--shorter

ifA2youA2decreaseA2theA2transmitA2frequency,A2thenA2theA2beamA2widthA2willA2(increaseA2or
A2decrease)A2-A2Ans--increase


whenA2anA2imageA2isA2frozen,A2anA2elipseA2canA2beA2usedA2toA2measureA2theA2____A2ofA2
aA2structureA2-A2Ans--area

theA2timeA2itA2takesA2forA2oneA2pulseA2toA2occurA2-A2Ans--pulseA2duration

widerA2dynamicA2range,A2meansA2moreA2shadesA2ofA2grey,A2andA2aA2(lowerA2orA2higher)A2
contrastA2-A2Ans--lower

narrowA2dynamicA2range,A2meansA2fewA2shadesA2ofA2grey,A2andA2aA2(lowerA2orA2higher)A2
contrastA2-A2Ans--higher

(lowA2orA2high)A2frequencyA2andA2(lowA2orA2high)A2amplitude,A2willA2causeA2anA2increaseA2
inA2theA2mechanicalA2indexA2andA2theA2riskA2forA2cavitationA2-A2Ans--
lowA2frequency,A2highA2amplitude

LCDA2monitorA2acceptA2theA2digitalA2signalA2andA2doA2notA2needA2aA2.....A2-A2Ans--
digitalA2toA2analogA2converter

, flowA2isA2halvedA2whenA2lengthA2isA2-A2Ans--doubled

increasedA2vesselA2length,A2increasesA2resistance,A2whichA2(increasesA2orA2decreases)A2f
low?A2-A2Ans--decreases

_____A2lossA2isA2associatedA2withA2accelerationA2andA2decelerationA2-A2Ans--inertia

flowA2isA2halvedA2whenA2resistanceA2isA2-A2Ans--doubled

trueA2orA2false?
A2aA2successfulA2dopplerA2examA2mayA2beA2performedA2regardlessA2ofA2hematocrit?A2-
A2Ans--true


maximumA2transmissionA2willA2occurA2whenA2aA2mediumA2hasA2anA2identicalA2______A2as
A2theA2initialA2mediumA2-A2Ans--impedance


snellsA2lawA2definesA2theA2physicsA2ofA2-A2Ans--refraction

reflectionA2willA2alwaysA2occurA2withA2differentA2impedancesA2ANDA2_______A2incidenceA
2-A2Ans--perpendicularA2incidence


refractionA2willA2occurA2withA2differentA2speedsA2andA2_____A2incidenceA2-A2Ans--oblique

dynamicA2rangeA2isA2aA2______A2measurementA2-A2Ans--relative

PACSA2systemsA2areA2mostA2likelyA2toA2beA2_____A2notA2analogA2-A2Ans--digital

meansA2manyA2grayA2shadesA2-A2Ans--wideA2dynamicA2range

usingA2aA2lensA2isA2aA2formA2ofA2_____A2focusingA2-A2Ans--transmit

dynamicA2aperatureA2isA2aA2formA2ofA2_____A2focusingA2
(receiveA2orA2transmit)A2-A2Ans--receive

toA2getA2aA2lowerA2frequency,A2youA2needA2aA2(thinnerA2orA2thicker)A2crystalA2-A2Ans--
thicker

rarefactionA2doesA2orA2doesA2notA2interfereA2withA2theA2studyA2ofA2bioeffectsA2-A2Ans--
doesA2not

whatA2isA2theA2mainA2thingA2thatA2improvesA2axialA2resolution?A2-A2Ans--shorterA2pulses

howA2isA2frequencyA2relatedA2toA2PZTA2crystalA2thickness?A2-A2Ans--inversely

whatA2transducerA2doesA2thisA2describe?