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Exam (elaborations)

SPI ULTRASOUND Registry Review Exam With 100% Correct And Verified Answers

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SPI ULTRASOUND Registry Review Exam With 100% Correct And Verified Answers

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SPI ULTRASOUND REGISTRY
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Institution
SPI ULTRASOUND REGISTRY
Course
SPI ULTRASOUND REGISTRY

Document information

Uploaded on
May 13, 2025
Number of pages
14
Written in
2024/2025
Type
Exam (elaborations)
Contains
Questions & answers

Subjects

  • spi ultrasound registry review exam with 100 corr
  • with phased array transducers the transmitted sou
  • the frequency ranges for ultrasound are
  • the speed of sound in soft tissue is

Content preview

SPI ULTRASOUND Registry Review Exam
With 100% Correct And Verified Answers
SPLi-iCorrectiAnswer-wavelengthixi#ioficycles

Withiphasediarrayitransducers,itheitransmittedisoundibea
miisisteeredibyi-iCorrectiAnswer-
Varyingitheitimingiofipulsesitoitheiindividualipiezoelectrici
elements

Whatitypeiofiwaveiisisound?i-iCorrectiAnswer-
mechanicaliandilongitudinal

TheiFrequencyirangesiforiUltrasoundiare:i-
iCorrectiAnswer->i20,000iHzi(20kHz)



Theispeediofisoundiinisoftitissueiis:i-iCorrectiAnswer-
1540im/s

LinearisequenceiArrayi-iCorrectiAnswer-
transducerithatifiresitheielementsiinigroups

UnitiforiWavelengthi-iCorrectiAnswer-isimillimeters

Enhancementiisicausedibyi-iCorrectiAnswer-
weaklyiattenuatingistructuresi(suchiasiaicyst)

Theiwavelengthiiniaimaterialihavingiaipropagationispeediof
i1.5imm/

usiemployingiaitransducerifrequencyiofi5.0iMHziis:i-
iCorrectiAnswer-0.3immiWavelength=ic/fi=i1.5mm/

usi÷i5MHzi=i0.3mm



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, Aniultrasounditransducericonverts:i-iCorrectiAnswer-
electricalienergyiintoimechanicalienergyiandiviceiversa

Theiorderiofiattenuation,ifromitheilowestiattenuationitoihig
hest:i-iCorrectiAnswer-fat,imuscle,ibone,iair

PropagationiSpeedifromitheilowestitoihighest:i-
iCorrectiAnswer-air,ifat,imuscle,ibone



Ifitheifrequencyidoubled,iwhatitoiwavelength?i-
iCorrectiAnswer-

Decreaseibyioneihalf/
iFrequencyiandiwavelengthiareiinverselyirelated



Whatihappeneditoiintensityiifitheiamplitudeiofiaisignaliisihal
ve?i-iCorrectiAnswer-
Quarted/
iIntensityiisiproportionalitoitheiamplitudeisquared,isoiifithei

amplitudeiisihalved,itheiresultingiintensityiisioneifourthithe
ioriginaliintensity



Dutyifactori-iCorrectiAnswer-
isitheipercentageiofitheitimeitheisoundiisibeingitransmitted

Ai3dBigainiwouldiindicatediiniintensityiby:i-
iCorrectiAnswer-

2itimesi(Aigainiofi3dBiresultsiinidoublingiofiintensityi(oripo
wer))

Ignoringitheieffectsiofiattenuation,itheiintensityiofiultrasou
ndibeamiisiusuallyigreateriatitheifocalizoneibecauseiof:i-
iCorrectiAnswer-

Theismalleribeamidiameteri(Intensityiequalsipoweridivided



iiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii Vendarsol
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