Computed Tomography for Technologists: Exam Review Questions and Answers Updated 2026

Computed Tomography for
Technologists: Exam Review
Questions and Answers Updated
2026
InAtheACTAsetting,AwhichAdescribesAtheAconceptAofAbasicA(orAsimple)Aconsent?
a.ABeforeAtheACTAexamination,AtheAtechnologistAexplainsAtheAprocedureAtoAtheApatientAandAa
sksAtheApatientAifAheAorAsheAagrees.
b.AAAwrittenAdocumentAisAgivenAtoAtheApatientAorAguardianA(orAreadAtoAtheApatient,AifAneces
sary).ATheAdocumentAlistsAallAofAtheApotentialAcomplicationsAofAtheAprocedure.ATheApatientAm
ustAsignAtheAformAtoAacknowledgeAthatAheAorAsheAunderstandsAbothAtheArisksAandAbenefitsA
ofAtheAexamination.
c.AConsentAthatAisAinferredAfromAsignsAorAaction.AForAexample,AifAaApatientAholdsAoutAhisAor
AherAarmAsoAthatAyouAcanAstartAanAintravenousAline,AitAcanAbeAimpliedAthatAheAorAsheAgive
sAhisAorAherAconsentAtoAtheAprocedure.
d.ATheArequirementAthat,AforAminors,AoneAorAmoreAparentAmustAconsentAtoAtheAprocedure.A-
AAnswerAa.ABeforeAtheACTAexamination,AtheAtechnologistAexplainsAtheAprocedureAtoAtheApat
ientAandAasksAtheApatientAifAheAorAsheAagrees.


AApatientAisAbeingAscheduledAforAaACTAexaminationAofAtheAneck.ATheApatientAalsoAneedsAaAn
umberAofAotherAdiagnosticAexaminations.AWhichAofAtheAfollowingAexaminationsAmayAaffectAth
eAdateAscheduledAforAtheACTAstudy?
a.AUpperAGI
b.ANuclearAmedicineAthyroidAscan
c.AMRAabdomenAandApelvisAexamination
d.ADopplerAultrasoundAofAtheAlowerAextremityA-AAnswerAb.ANuclearAmedicineAthyroidAscan


.AAllAofAtheAfollowingAareAreasonsAforAobtainingAaAhistoryAbeforeAaACTAexaminationAisAperfo
rmedAEXCEPT
a.AtoAverifyAthatAtheApatientAhasAnotAexceededAtheAradiationAlimit.
b.AtoAselectAtheAappropriateAprotocol.
c.AtoAbeAsureAtheAexaminationAcanAbeAperformedAsafely.
d.AtoAaideAtheAradiologistAinAhisAorAherAinterpretationAofAtheACTAexamination.A-
AAnswerAa.AtoAverifyAthatAtheApatientAhasAnotAexceededAtheAradiationAlimit.

,WhatAisAaAgeneralAruleAregardingAtheAadministrationAofAintravascularAcontrastAmediaAtoApati
entsAreceivingAdialysis?
a.APatientsAonAdialysisAshouldAneverAbeAgivenAcontrastAmedia.
b.APatientsAonAdialysisAwhoAstillAhaveAsomeAresidualAkidneyAfunctionAshouldAnotAbeAgivenAc
ontrastAmedia;ApatientsAwithAend-stageArenalAfailureAcanAbeAgivenAcontrastAmedia.
c.AWhenAcontrastAmediaAisAgiven,AdialysisAmustAbeAscheduledAtoAbeAperformedAwithinA4Ahou
rs.
d.AContrastAmediaAposesAnoArisksAtoApatientsAonAdialysis.A-
AAnswerAb.APatientsAonAdialysisAwhoAstillAhaveAsomeAresidualAkidneyAfunctionAshouldAnotA
beAgivenAcontrastAmedia;ApatientsAwithAend-
stageArenalAfailureAcanAbeAgivenAcontrastAmedia.


InAmanyAinstitutionsAaAradiologistAisAconsultedAbeforeAintravenousAcontrastAmediumAisAadmi
nisteredAtoApatientsAinAwhomAtheAeGRFAvalueAisAlessAthan
a.A5AmL/min/1.73Am2.
b.A15AmL/min/1.73Am2.
c.A30AmL/min/1.73Am2.
d.A60AmL/min/1.73Am2.A-AAnswerAc.A30AmL/min/1.73Am2.


YouAcompleteAtheACTAexaminationAandAwillAremoveAtheAintravenousAcatheter.AWhichAofAtheAf
ollowingAmedicationsAmayAnecessitateAholdingApressureAonAtheApunctureAsiteAforAaAlongerApe
riod?
a.ACoumadin
b.ABenadryl
c.ATylenol
d.ASynthroidA-AAnswerAa.ACoumadin


InAwhatAcircumstancesAisAitAacceptableAtoAuseAaAlarge-
boreAtunneledAdialysisAcatheterAforAtheAinjectionAofAiodinatedAcontrastAmedia?
a.AWheneverAaAstandardAperipheralAIVAaccessAisAnotAavailable.
b.AWhenAtheAcontrastAflowArateAisA2AmL/sAorAless.
c.AWhenAtheApatencyAofAtheAlineAhasAbeenAverifiedAbyAflushingAwithAsaline.
d.AAAdialysisAcatheterAshouldAneverAbeAusedAforAcontrastAmediaAadministration.A-
AAnswerAd.AAAdialysisAcatheterAshouldAneverAbeAusedAforAcontrastAmediaAadministration.

,DocumentationAofAIVAcontrastAadministrationAis
a.AonlyAnecessaryAwhenAanAadverseAeventAoccurs.
b.AonlyAnecessaryAwhenAroutineAinjectionAparametersAareAmodified.
c.ArequiredAonAallApatientsAandAmustAbeAcosignedAbyAaAradiologist.
d.ArequiredAonAallApatientsAandAshouldAincludeAtheAnameAofAtheAagent,AtheAdose,AtheAflowA
rate,AandAtheAinjectionAsite.A-
AAnswerAd.ArequiredAonAallApatientsAandAshouldAincludeAtheAnameAofAtheAagent,AtheAdose,
AtheAflowArate,AandAtheAinjectionAsite.


WhichAisAaATRUEAstatementAregardingAvenipunctureAinAaAperipheralAveinAforAtheAplacementA
ofAanAIVAlineAforAaACTAcoronaryAangiogram?
a.AAA22-gaugeAbutterflyAinfusionAsetAshouldAbeAused.
b.AAnA18-gaugeAstraightAneedleAshouldAbeAused.
c.AAnAindwellingAcatheterAsetAwithAaAflexibleAplasticAcannulaAshouldAbeAused,ApreferablyA20
AgaugeAorAlarger.
d.AAAHuberAneedleAshouldAbeAused.A-
AAnswerAc.AAnAindwellingAcatheterAsetAwithAaAflexibleAplasticAcannulaAshouldAbeAused,Apre
ferablyA20AgaugeAorAlarger.


10.AAutomatedAinjectionAtriggeringAmethodsAareAusedAto
a.AsimplifyAtheAprocessAofAcontrastAinjection,AsoAthatAassistantsAcanAperformAtheAtaskAandAp
atientAthroughputAcanAbeAincreased.
b.AimproveApatientAsafetyAbyAreducingAcontrastAextravasations.
c.AeffectivelyAaccommodateAforAindividualAdifferencesAinAcirculationAtimeAbyAadjustingAtheAsca
nAdelay.
d.AeffectivelyAaccommodateAforAindividualAdifferencesAinAcirculationAtimeAbyAadjustingAtheAco
ntrastAflowArate.A-
AAnswerAc.AeffectivelyAaccommodateAforAindividualAdifferencesAinAcirculationAtimeAbyAadjusti
ngAtheAscanAdelay.


#11)AInAwhatAphaseAofAtissueAenhancementAisAtheAiodinatedAcontrastAinAFigureA24-1?A-
AAnswerAb.ABolus



WhatAtypeAofAheparinAisAusedAtoAflushAdevicesAsuchAasAPICCsAandACVADs?
a.AConcentratedAheparinAsodium,AgenerallyA10,000Aunits/mL,AfollowedAbyA5AmLAofAnormalAs
aline.

, b.AConcentratedAheparinAsodium,AgenerallyA100Aunits/mL.
c.AOnlyAaApremixedAheparinAflushAsolutionAshouldAbeAused.
d.AUndiluted,AfractionatedAheparin.A-
AAnswerAc.AOnlyAaApremixedAheparinAflushAsolutionAshouldAbeAused.



WhatApropertyAofAintravenousAcontrastAmediaAisAresponsibleAforAitsAcapacityAtoAincreaseAaAs
tructure'sAabilityAtoAattenuateAtheAx-rayAbeam?
a.AOsmolality
b.AViscosity
c.AIodineAconcentration
d.AIonicAnatureA-AAnswerAc.AIodineAconcentration


WhichAisAaAtrueAstatementAregardingAoverranging?
a.AOverrangingAresultsAinAstreakAartifactsAonAtheAimage.
b.AOverrangingAonlyAoccursAwithAhelicalAscanAsequences.
c.AOverrangingAisAanAimportantAtechniqueAusedAtoAreduceAtheAradiationAdoseAtoAtheApatient.
d.AOverrangingAhasAbeenAeliminatedAforAscannersAwithA64,A128,AorA256Adetectors.A-
AAnswerAb.AOverrangingAonlyAoccursAwithAhelicalAscanAsequences.



AACTAofAtheAabdomenAandApelvisAisAorderedAforAaAchildAweighingA18Akg.AUsingAtheAstandar
dApediatricAformula,AwhatAdoseAofAiodinatedAcontrastAmediumAisAgiven?
a.A9AmL
b.A18AmL
c.A36AmL
d.A54AmLA-AAnswerAc.A36AmL


WhichAisAaATRUEAstatementAregardingAtheAriskAofAiodinatedAcontrastAmediaAtoAtheAfetus?
a.AAtAtheAusualAclinicalAdoses,AiodinatedAcontrastAmediaAdoesAnotAcrossAtheAhumanAplacenta
AandAthereforeAwillAnotAenterAtheAfetus.
b.AManyAstudiesAhaveAbeenAdoneAonAtheAeffectsAofAiodinatedAcontrastAmediaAinApregnantAw
omen.
c.AAlthoughAnoAdefiniteAriskAtoAtheAfetusAhasAbeenAidentified,AnotAenoughAstudiesAhaveAbeen
AdoneAtoAconcludeAthatAthereAareAnoArisks.