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SPI Exam Review Questions with correct answers
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SPI Exam Review Questions with correctanswers
ultrasound nnimaging nntype nnin nnwhich nnpulses nnare nnreflected nnand nnused nnto nnproduce nna nndisplay nn-
nncorrect nnanswer-pulsed nnwave
brightness nnof nnthe nndots nnon nnimage nn- nncorrect nnanswer-amplitude
round-trip nntravel nntime nnper nncm nnin nnsoft nntissue nn- nncorrect nnanswer-13 nnmicroseconds
A nnline nnproduced nnon nna nndisplay nnthat nnrepresents nnultrasonic nnechoes nnreturning nnfrom nnthe nnbody. nnA
nnsonographic nnimage nnis nncomposed nnof nnmany nnsuch nnlines. nn- nncorrect nnanswer-scan nnline
Type nnof nnimage nnpresented nnin nna nnrectangular nnformat.
- nnEach nnpulse nntravels nnin nnsame nndirection
- nnDifferent nnstarting nnpoint nnfor nneach nnpulse
- nnYields nnseries nnof nnparallel nnscan nnlines nn- nncorrect nnanswer-linear
Type nnof nnimage nnpresented nnin nna nnpie-slice nnor nnwedge nnshaped nnformat.
- nnEach nnpulse nnoriginates nnfrom nnthe nnsame nnstarting nnpoint
- nnSubsequent nnpulses nngo nnout nnin nndifferent nndirections nnfrom nnprevious nnones nn- nncorrect nnanswer-sector
Frequency nnchange nntracking nncaused nnby nnmotion nnof nnreflectors nntowards nnor nnaway nnfrom nnthe
nntransducer
- nnUsed nnextensively nnin nnvascular nn& nncardiac nnultrasound nn- nncorrect nnanswer-Doppler nnShift
The nnpresentation nnof nntwo-dimensional, nnreal-time nnDoppler-shift nninformation nnsuperimposed nnon nna
nnreal-time, nngray-scale, nnanatomic, nncross-sectional nnimage. nnFlow nndirections nntoward nnand nnaway nnfrom
,nnthe nntransducer nn(i.e., nnpositive nn& nnnegative nnDoppler nnshifts) nnare nnpresented nnas nndifferent nncolors nnon
nnthe nndisplay. nn- nncorrect nnanswer-Color nnDoppler
Unit nnof nnpower nnor nnintensity nnratio; nnalso nna nnunit nnof nnamplitude nnratio nn- nncorrect nnanswer-decibel
doubled nnintensity nnin nndB nn- nncorrect nnanswer-3 nndB
mathematical nnnumerical nnsystem nnin nnwhich nnthe nnnumber nnof nn10s nnthat nnare nnmultiplied nntogether nnin
nnorder nnto nnequal nnthe nnnumber
Log₁₀ nnof nn100 nn= nn10 nn× nn10 nn= nn100 nnor nn10²
Log₁₀ nnof nn100 nn= nn2 nn- nncorrect nnanswer-logarithm
What nntransports nnenergy, nnnot nnmatter? nn- nncorrect nnanswer-wave
Type nnof nnsound nnwave nnthat nnrequires nna nnmedium nnto nntravel nnin nnand, nntherefore, nncannot nnpropagate nnin
nna nnvacuum. nn- nncorrect nnanswer-mechanical
Regions nnof nnhigh nndensity nnand nnpressure nnin nna nncompressional nnwave. nn- nncorrect nnanswer-compression
Region nnof nnlow nndensity nnand nnpressure nnin nna nncompressional nnwave. nn- nncorrect nnanswer-rarefaction
What nnare nnthe nn3 nnacoustic nnvariables? nnList nnthem nnalphabetically. nn- nncorrect nnanswer-density, nndistance,
nnpressure
Concentration nnof nnforce
- nnUnits: nnpascals nn(Pa), nnlbs/in², nnatmospheres nn- nncorrect nnanswer-Pressure
Concentration nnof nnmass
,- nnUnits: nnkilo/cm³ nn- nncorrect nnanswer-Density
cycles nnper nnsecond nn- nncorrect nnanswer-frequency
unit nnof nnfrequency, nnone nncycle nnper nnsecond nn- nncorrect nnanswer-hertz
20 nn→ nn20,000 nnHz nn(20 nnkHz) nn- nncorrect nnanswer-audible nnsound
2 nnto nn15 nnMHz nn- nncorrect nnanswer-What nnis nnthe nnuseful nndiagnostic nnfrequency nnrange nnfor nnultrasound
nnin nnhumans?
time nnper nncycle
- nnEquation: nnIf nnT nn= nnperiod nnin nnmicroseconds nn(µs) nnand nnƒ nn= nnfrequency nnin nnmegahertz nn(MHz), nnthen
T nn(µs) nn= nn1/ƒ nn(Mhz)
nn
- nnReciprocal nnof nnfrequency nnequation nn- nncorrect nnanswer-period
As nnfrequency nnincreases, nnperiod nn_________. nn- nncorrect nnanswer-decreases
length nnof nnspace nnover nnwhich nna nncycle nnoccurs
- nnAbbreviated: nnλ nn(lambda) nn- nncorrect nnanswer-wavelength
0.1 nn→ nn0.8 nnmm nn- nncorrect nnanswer-What nnis nnthe nntypical nnultrasound nnwavelength nnrange?
speed nnwith nnwhich nna nnwave nnmoves nnthrough nna nnmedium
Units: nnmm/μs, nnm/s
Abbreviation: nnc nn- nncorrect nnanswer-propagation nnspeed
What nntwo nnproperties nnof nna nnmedium nnaffect nnits nnpropagation nnspeed? nn- nncorrect nnanswer-density,
nnstiffness
, 1.54 nnmm/μs nnOR nn1540 nnm/s nn- nncorrect nnanswer-speed nnof nnsound nnin nnsoft nntissue
Order nnthe nnfollowing nnby nnpropagation nnspeed nnfrom nnslowest nnto nnfastest:
bone, nnfat, nnair, nnmuscle, nnliver nn- nncorrect nnanswer-air, nnfat, nnliver, nnmuscle, nnbone
the nnresistance nnthat nnsound nnencounters nnin nntraveling nnthrough nna nnmedium nn- nncorrect nnanswer-
impedance
unit nnof nnimpedance nn- nncorrect nnanswer-Rayl
equation nnthat nnillustrates nnrelationship nnbetween nnround-trip nnpulse nntravel nntime, nnpropagation nnspeed,
nnand nndistance nnto nnthe nnreflector nn- nncorrect nnanswer-range nnequation
(PW) nnthe nnnumber nnof nnpulses nnthat nnoccur nnin nn1 nnsec; nnsometimes nncalled nnpulse nnrepetition nnrate nn-
nncorrect nnanswer-pulse nnrepetition nnfrequency
When nndistance nn(depth) nnincreases, nnPRF nn---------. nn- nncorrect nnanswer-decreases
What nnmust nnthe nnsonographer nnchange nnto nnalter nnthe nnPRF? nn- nncorrect nnanswer-depth
Interval nnof nntime nnfrom nnthe nnbeginning nnof nnone nnpulse nnto nnthe nnbeginning nnof nnthe nnnext.
** nnIncludes nnpulse nntime nn& nnlistening nntime nn**
Units: nnSeconds nn(s) nn- nncorrect nnanswer-pulse nnrepetition nnperiod
PRP nnincreases nnbecause nnthe nnsystem nnmust nnlisten nnlonger nnfor nnpulse nnto nnreturn nnfrom nnlonger
nndistance. nn- nncorrect nnanswer-What nnhappens nnto nnPRP nnwhen nndistance nn(depth) nnincreases:
Interval nnof nntime nnfrom nnbeginning nnto nnend nnof nna nnpulse
Units: nnµs nn(microseconds) nn- nncorrect nnanswer-pulse nnduration
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