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ARDMS SPI EXAM LATEST UPDATE COMPREHENSIVE QUESTIONS AND CORRECT ANSWERS
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ARDMS SPI EXAM LATEST UPDATE COMPREHENSIVE QUESTIONS AND CORRECT ANSWERS
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ARDMS SPI EXAM LATEST 2024-2025UPDATE COMPREHENSIVE QUESTIONS
AND CORRECT ANSWERS
Example tof tnonspecular treflector t- t✔✔red tblood tcells
What thappens tto tspatial tpulse tlength twhen tfrequency tincreases? t- t✔✔decreases
Axial tresolution tis tdependent ton? t- t✔✔wavelength
Lateral tresolution tis tdependent ton? t- t✔✔beam tdiameter
Where tdoes tthe tbeam tof tan tunfocused ttransducer tdiverge? t- t✔✔Fraunhofer tzone
Reverberation tartifacts tare ta tresult tof t- t✔✔two tor tmore tstrong treflecting tsurfaces
True/False: tGrating tlobes tare tessential tfor tthe tproper toperation tof ta tlinear tphased
tarray. t- t✔✔False
True/False: tElectronically tsteered tscanners talways tproduce thigher tresolution timages
tthan tdo tmechanically tsteered tscanners. t- t✔✔False
True/False: tAn tannular tarray tscanner tuses tmechanical tbeam tsteering. t- t✔✔True
True/False: tA tlinear tsequenced tarray tcannot tbe tdynamically tfocused. t- t✔✔False
registration tor tB-mode talignment t- t✔✔Which tAIUM ttest tobject tfunction tutilizes tall tthe
tgroups tof twires tin tthe tAIUM t100 tmm ttest tobject?
axial tresolution t- t✔✔Which tAIUM ttest tobject tfunction tutilizes tthe tA tgroup tof twires tin
tthe tAIUM t100 tmm ttest tobject?
lateral tresolution t- t✔✔Which tAIUM ttest tobject tfunction tutilizes tthe tB tgroup tof twires tin
tthe tAIUM t100 tmm ttest tobject?
dead tzone t- t✔✔Which tAIUM ttest tobject tfunction tutilizes tthe tD tgroup tof twires tin tthe
tAIUM t100 tmm ttest tobject?
,depth tcalibration t- t✔✔Which tAIUM ttest tobject tfunction tutilizes tthe tC tor tE tgroups tof
twires tin tthe tAIUM t100 tmm ttest tobject?
What thappens tto taxial tresolution twhen tspatial tpulse tlength tis tdecreased? t-
t✔✔improves
How tmuch twill ta t3.5 tMHz tpulse tbe tattenuated tafter tpassing tthrough t2 tcm tof tsoft
ttissue? t- t✔✔3.5 tdB
Propagation tspeed terrors tresult tin t- t✔✔improper taxial tposition
Enhancement tis tcaused tby t- t✔✔weakly tattenuating tstructures
The tDoppler tshift tfrequency tis t- t✔✔directly tproportional tto tthe tvelocity tof tthe treflector
The tnumber tof tframes tper tsecond tnecessary tfor ta treal-time timage tto tbe tflicker tfree
tis t- t✔✔more tthan t15
True/False: tThe tSPTA tintensity twill talways tbe tlarger tthan tthe tSATA tintensity. t-
t✔✔True
The tintensity tof tthe tultrasound tbeam tis tusually tgreater tat tthe tfocal tzone tbecause tof t-
t✔✔the tsmaller tbeam tdiameter
If tthe tamplitude tis tdoubled, tthe tintensity tis t- t✔✔quadrupled
The tattenuation tfor tsoft ttissue tis t- t✔✔increased twith ttissue tthickness
The tacoustic timpedance tof tthe tmatching tlayer t- t✔✔can tbe tchosen tto timprove
ttransmission tinto tthe tbody
True/False: tIn ta tpulse-echo tsystem, tthe tquality tfactor tshould tbe tmade tas tlarge tas
tpossible. t- t✔✔False
True/False: tThe tbeam tdiameter tis tconstant tin tthe tnear tzone. t- t✔✔False
The toperating tfrequency tis tdependent ton t- t✔✔thickness tof tthe tcrystal
The tperiod tof tan tultrasound twave tis t- t✔✔the ttime tof tone twavelength
The tdynamic trange tof ta tsystem tis t- t✔✔the tratio tof tsmallest tto tlargest tpower tlevel
tthat tthe tsystem tcan thandle
True/False: tThe tintensity tof tan tultrasonic tbeam tcan tbe tmeasured twith tradiation tforce
tbalance. t- t✔✔True
,Increasing tthe tpulse trepetition tperiod t- t✔✔increases tthe tmaximum tdepth tthat tcan tbe
timaged
Ultrasound tbioeffects t- t✔✔are tnot tconfirmed tbelow t100 tmW/cm² tSPTA
True/False: tNo trefraction tcan toccur tat tan tinterface tif tthe tmedia timpedances tare
tequal. t- t✔✔False
True/False: tSmaller ttransducers talways tproduce tsmaller tbeam tdiameters. t- t✔✔False
True/False: tThe tultrasound tbeam tprofile tcan tbe tmeasured twith ta thydrophone. t-
t✔✔True
True/False: tThe tpulsed-Doppler tsystem tyields tbetter tdepth tresolution tthan tthe
tcontinuous twave t(CW) tsystem. t- t✔✔True
True/False: tThe tgray-scale tdisplay twas tmade tpossible twhen tdigital tscan tconverters
treplaced tanalog tscan tconverters. t- t✔✔False
True/False: tVideotape trecorders toperating tat t30 tframes tper tsecond tcannot tbe tused
twith tmechanical treal-time tunits tbecause tthe tfram trate tis ttoo tslow. t- t✔✔False
True/False: tLinear tphased tarray tscanners tneed tno tform tof tmechanical tfocusing
tbecause tfocusing tis tperformed telectronically. t- t✔✔False
True/False: tThe tfram trate tof treal-time tscanners tdepends ton tthe tnumber tof tlines tused
tto tform tthe timage. t- t✔✔True
True/False: tIt tis tnot tpossible tto tsteer tan tannular tphased tarray telectronically. t-
t✔✔True
True/False: tThe tnear tzone tlength tshould tbe tkept tas tshort tas tpossible. t- t✔✔False
What tpercentage tof tintensity tof tan tultrasound tpulse tincident ton tan tinterface tof t0.25
tand t0.75 trayls tis treflected? t- t✔✔25%
Axial tresolution tcan tbe timproved tby tusing t- t✔✔higher tfrequency ttransducers
When tparticle tmotion tof ta tmedium tis tparallel tto tthe tdirection tof ta twave tpropagation,
tthe twave tbeing ttransmitted tis tcalled ta t- t✔✔longitudinal twave
The twavelength tin ta tmaterial thaving ta twave tvelocity tof t1500 tm/s templying ta
ttransducer tfrequency tof t5 tMHz tis t- t✔✔0.3 tmm
The tfactor tthat tdetermines tthe tamount tof treflection tat tthe tinterface tof ttwo tdissimilar
tmaterials tis t- t✔✔difference tin tacoustic timpedances
, The tequation tthat tdescribes tthe trelationship tamong tpropagation, twavelength, tand
tfrequency tis t- t✔✔λ t= tc/ƒ
What tthree tthings tcan toccur twhen tan tultrasonic tbeam treaches tthe tinterface tof ttwo
tdissimilar tmaterials? t- t✔✔reflection, trefraction, tmode tconversion
The tacoustic timpedance tof ta tmaterial tis t- t✔✔equal tto tthe tproduct tof tdensity tand
tvelocity
The taverage tvelocity tof tultrasonic twaves tin tsoft ttissue tis t- t✔✔1540 tm/s
True/False: tReceiver-angle tvalues tin tCW tDoppler tanalysis tdo tnot tinfluence tthe tfinal
tDoppler tshift. t- t✔✔False
Refraction toccurs tbecause tof tdifference tin t______ tacross tan tinterface tbetween ttwo
tmaterials t- t✔✔wave tvelocity
Reflection tfactor tat tan tinterface tbetween ttwo tmaterials tdepends tprimarily ton tthe
tchange tin t______ tacross tthe tinterface. t- t✔✔acoustic timpedance
The tvelocity tof tsound twaves tis tprimarily tdependent ton t- t✔✔medium tand tmode tof
tvibration
Increasing tthe tfrequency tof tan tultrasonic tlongitudinal twave twill tresult tin t______ tin tthe
tvelocity tof tthat twave. t- t✔✔no tchange
The tchange tin tdirection tof tan tultrasonic tbeam, twhen tit tpasses tfrom tone tmedium tto
tanother, tin twhich telasticity tand tdensity tdiffer tfrom tthose tof tthe tfirst tmedium tis tcalled
t- t✔✔refraction
A tlong tnear tzone tcan tbe tobtained tby t- t✔✔using ta thigher tfrequency ttransducer
If ta t2 tMHz tfrequency tis tused tin thuman tsoft ttissue, tthe twavelength tis tapproximately t-
t✔✔0.75 tmm
The tratio tof tparticle tpressure tto tparticle tvelocity tat ta tgiven tpoint twithin tthe tultrasonic
tfield tis t- t✔✔impedance
What tis tthe tfollowing tformula tused tto tdetermine?
(2 t× tvelocity tof treflector t× toriginal tfrequency) t/ tvelocity tof tsound t- t✔✔Doppler tshift
tfrequency
The tprinciple tthat tstates tthat tall tpoints ton ta twavefront tcan tbe tconsidered tas tpoint
tsources tfor tthe tproduction tof tsperical tsecondary twavelets twas tpostulated tby t-
t✔✔Huygens
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