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Computed Tomography- Test 1

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Computed Tomography- Test 1

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2025/2026

Institution CT -- Computed Tomography

Course CT -- Computed Tomography

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Computed Tomography- Test 1

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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

, TypeAofAscanningAdependsAonAthe:A-
AAnswerAbeamAgeometryA(shapeAofAtheAradiationAbeam)AwhichAisAbasedAonAtheAspecificACT
AmachineAandAcomponentsAthatAareAused.

3AtypesAofAacquisitionAgeometriesA-AAnswerA1.AparallelAbeam
2.AfanAbeamA
3.AspiralAbeam

2AelementsAinAaAbasicAschemeAforAdataAacquisitionAare: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-rayAbeamAwithA1AlinearAdetector

-
dataAacquisitionAprocess:A1AbeamAandA1AdetectorAfirstAtranslatesA(makesA1Asweep)AacrossAth
eApatientAtoAcollectAreadings.AAfterA1Atranslation,AtheAtubeA&AdetectorArotateA1AdegreeAandA
repeatAtheAprocessAuntilA180AtranslationsAhaveAbeenAachieved.A

-disadvantage:AexposureAtimeArequiredA5AminAforA1AsliceA(mm)

-HeadACTAcapabilityAonly

SecondAGenerationA-AAnswerA-translateAandArotateAmotionAtype

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Uploaded on: April 21, 2026
Number of pages: 6
Written in: 2025/2026
Type: Exam (elaborations)
Contains: Questions & answers

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