Docsity
Docsity
Prepare for your exams
Prepare for your exams

Study with the several resources on Docsity

Earn points to download
Earn points to download

Earn points by helping other students or get them with a premium plan

Guidelines and tips
Guidelines and tips
Sell on Docsity
Sell on Docsity
Docsity AI
Docsity AI
Log inSign up

Prepare for your exams

Study with the several resources on Docsity

Find documents

Prepare for your exams with the study notes shared by other students like you on Docsity

Search for your university

Find the specific documents for your university's exams

Docsity AINEW

Summarize your documents, ask them questions, convert them into quizzes and concept maps

Explore questions

Clear up your doubts by reading the answers to questions asked by your fellow students

Earn points to download

Earn points by helping other students or get them with a premium plan

Share documents
download point icon20 Points

For each uploaded document

Answer questions
download point icon5 Points

For each given answer (max 1 per day)

All the ways to get free points
Get points immediately

Choose a premium plan with all the points you need

Study Opportunities

Choose your next study program

Get in touch with the best universities in the world. Search through thousands of universities and official partners

Community

Ask the community

Ask the community for help and clear up your study doubts

Free resources

Our save-the-student-ebooks!

Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors

Computed Tomography- Test 1, Exams of Medical Sciences

West Virginia University (WVU)Medical Sciences
Prof. Laura Oliver

Computed Tomography- Test 1 Computed Tomography- Test 1

Typology: Exams

2025/2026

Available from 05/03/2026

Examprephub
Examprephub 🇺🇸

545 documents

1 / 6

Toggle sidebar

This page cannot be seen from the preview

Don't miss anything!

bg1
Computed Tomography- Test 1
Tomos-A-AAnswerAGreekAwordAmeaning:Asection
InitiallyAknownAasA-AAnswerAComputerAAssistedATomography
EvolvedAtoA-AAnswerAComputerizedAAxialATomography
Currently,AComputedAtomographyAisAusedAsinceACTAimagesAareAavailableAin:A-
AAnswerAsagittal,Acoronal,AandAaxialAplanesA(horizontal)
Dr.AGodfreyAHoundsfieldA-AAnswerAinventedAtheAfirstAcomputedAtomography
1971ATheAEMIAMarkA1A-AAnswerA(CTAbrainAscannerAprototype)AwasAinstalledAatAAtkinson-
Morley'sAHospitalAunderAtheAdirectionAofAradiologist,ADr.AJamesAAmbrose.
1972A-
AAnswerAAAwomanAwithAaAsuspectedAbrainAlesionAwasAtheAfirstApatientAscanned.ATheAscan
nerAconfirmedAtheApresenceAofAtheAlesion.
AllanACormackA-
AAnswerAPhysicsAProfessorAatATuftsAUniversity,AdevelopedAtheAmathematicsAusedAtoAreconstr
uctACTAimagesA(algorithms)
HoundsfieldA&ACormackA-
AAnswerAsharedAtheANobelAPrizeAinAMedicineAinA1979AforAtheirAcontributionsAtoACT
Dr.ARobertALedleyA-
AAnswerAProfessorAofAradiology,Aphysiology,A&AbiophysicsAatAGeorgetownAUniversity,Adevel
opedAtheAfirstAwholeAbodyAscanner.
DataAAcquisitionsA-
AAnswerArefersAtoAtheAmethodAbyAwhichAaApatientAisAscannedAandAtheAdataAisAusedAforAi
mageAreconstruction
pf3
pf4
pf5

Partial preview of the text

Download Computed Tomography- Test 1 and more Exams Medical Sciences in PDF only on Docsity!

Computed Tomography- Test 1

Tomos-A-AAnswerAGreekAwordAmeaning:Asection InitiallyAknownAasA-AAnswerAComputerAAssistedATomography EvolvedAtoA-AAnswerAComputerizedAAxialATomography Currently,AComputedAtomographyAisAusedAsinceACTAimagesAareAavailableAin:A- AAnswerAsagittal,Acoronal,AandAaxialAplanesA(horizontal) Dr.AGodfreyAHoundsfieldA-AAnswerAinventedAtheAfirstAcomputedAtomography 1971 ATheAEMIAMarkA 1 A-AAnswerA(CTAbrainAscannerAprototype)AwasAinstalledAatAAtkinson- Morley'sAHospitalAunderAtheAdirectionAofAradiologist,ADr.AJamesAAmbrose. 1972 A- AAnswerAAAwomanAwithAaAsuspectedAbrainAlesionAwasAtheAfirstApatientAscanned.ATheAscan nerAconfirmedAtheApresenceAofAtheAlesion. AllanACormackA- AAnswerAPhysicsAProfessorAatATuftsAUniversity,AdevelopedAtheAmathematicsAusedAtoAreconstr uctACTAimagesA(algorithms) HoundsfieldA&ACormackA- AAnswerAsharedAtheANobelAPrizeAinAMedicineAinA 1979 AforAtheirAcontributionsAtoACT Dr.ARobertALedleyA- AAnswerAProfessorAofAradiology,Aphysiology,A&AbiophysicsAatAGeorgetownAUniversity,Adevel opedAtheAfirstAwholeAbodyAscanner. DataAAcquisitionsA- AAnswerArefersAtoAtheAmethodAbyAwhichAaApatientAisAscannedAandAtheAdataAisAusedAforAi mageAreconstruction

TypeAofAscanningAdependsAonAthe:A- AAnswerAbeamAgeometryA(shapeAofAtheAradiationAbeam)AwhichAisAbasedAonAtheAspecificACT AmachineAandAcomponentsAthatAareAused. 3 AtypesAofAacquisitionAgeometriesA-AAnswerA1.AparallelAbeam 2.AfanAbeamA 3.AspiralAbeam 2 AelementsAinAaAbasicAschemeAforAdataAacquisitionAare:A- AAnswerAbeamAgeometryA&Acomponents BeamAGeometry:A- AAnswerArefersAtoAtheAshape,Asize,AandAmotionAofAtheAbeamAandAitsApath. Components:A- AAnswerAreferAtoAtheAphysicalAdevicesAthatAshapeAorAdefineAtheAbeam,AmeasureAitsAtransm issionAthroughAtheApatient,AandAconvertAtheAanalogAdataAintoAdigitalAdataAforAinputAintoAthe Acomputer. FirstAGenerationA-AAnswerA-translateAandArotateAmotionAtypeA(beamAgeometry- Ashape,Asize,AmotionAofAbeam)

  • utilizedAaAparallelA(pencilAthin)Ax-rayAbeamAwithA 1 AlinearAdetector

dataAacquisitionAprocess:A 1 AbeamAandA 1 AdetectorAfirstAtranslatesA(makesA 1 Asweep)AacrossAth eApatientAtoAcollectAreadings.AAfterA 1 Atranslation,AtheAtubeA&AdetectorArotateA 1 AdegreeAandA repeatAtheAprocessAuntilA 180 AtranslationsAhaveAbeenAachieved.A

  • disadvantage:AexposureAtimeArequiredA 5 AminAforA 1 AsliceA(mm)
  • HeadACTAcapabilityAonly SecondAGenerationA-AAnswerA-translateAandArotateAmotionAtype
  • exposureAtimeArequiredAisAlessAthanA 1 AminAforAentireAexamA
  • disadvantage:AincreasedApatientAdose FifthAGenerationA-AAnswerA-classifiedAasAhighAspeedAscanners
  • mostAcommon:AelectronAbeamACTA(EBCTAscanner)
  • developedAbyAImatronAinA 1983 AforAheartAscanningA
  • x-rayAsourceAisAnotAanAx-rayAtubeAbutAaAmicrowave- AacceleratedAelectronAbeamAoccurrenceAonAaAtungstenAtargetA

goalAisAtoAproduceAhighAresolutionAimageAofAmovingAanatomy.AEx.AheartArateAthatAisAfreeAo fAartifactsAcausedAbyAmotion

  • advantage:AexposureAtimeAisAlessAthanA 100 AmsA(10xAfasterAthanAconventionalACT) EBCTA-AAnswerA-dataAacquisition:AaAfanAbeamAofAx- raysAproducedAbyAaAbeamAofAelectronsAthatAscansAseveralAstationaryAtungstenAtargetAringsA
  • theAfanAbeamApassesAthroughAtheApatientA&Ax- rayAtransmissionAreadingsAareAcollectedAforAimageAreconstructionAbyAcomputer ConventionalACTA(sliceAbyAslice)A- AAnswerAallowsAtheApatientAtoAbeAscannedA 1 AsliceAatAaAtime.ATheAx- rayAtubeA&AdetectorsArotateAforA 360 AdegreesAwhileAtheAtableA&ApatientAremainAstationary. SpiralAHelicalACTA-AAnswerAutilizesAslipAringsAthatAallowAcontinuousArotationAofAtheAx- rayAtubeAcombinedAwithApatientAmovementAthroughAtheAgantry.ATheApatientAmovesAthroughAt heAgantryAwithAuninterruptedArotationAandAx-rayAoutput.

SlipARingA- AAnswerAElectromechanicalAdevicesAmadeAupAofAringsAandAbrushesAthatAtransmitAelectricalA energyAacrossAaArotatingAservice. VolumeAScanningA- AAnswerAisAtheAtermAusedAtoAdescribeAtheAacquisitionAofAvolumeAdataAbyAspiral/AhelicalAsc ans Spiral/AHelicalA-AAnswerAareAinterchangeableAtermsAdependingAonAtheAmanufacturer AdvantagesAofAVolumeAScanningA-AAnswerA- multiplanarAreconstructionAallowsAtheAdataAtoAbeAmoreAaccuratelyAreconstructedAinAalternativ eAplanes.A(ex.Acoronal,Asagittal,A 3 - D)

  • shorterAscanAtimesAasAaAresultAofAtheApatientAmovementAthroughAtheAgantry
  • moreAcoverageAinAaAsingleAbreath-holdA
  • gaplessAslices
  • lessAcontrastAmaterialAneeded
  • includesAmostAexamsAofAtheAchest,Aabdomen,AandApelvis
  • artifactsAreducedAdueAtoAlessApatientAmovement Multi-sliceACTAscannersA(1991)A-AAnswerA-initially,AscannersAimagedA 4 AslicesAperAx- rayAtubeArotation.
  • currentAmulti-sliceAscannersAperformA 16 - 320 Aslices/360AdegreeAx-rayAtubeArotation
  • theAbeamAbecomesAconeAshapedA
  • distinguishingAfeature:AscansAtheAentireAheartAinAaAsingleArotation