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1、ARTICLEINPRESSComparativedosimetryofdentalCBCTdevicesand64-sliceCTfororalandmaxillofacialradiologyabJohnB.Ludlow,DDS,MS,FDSRCSEd,andMarijaIvanovic,PhD,ChapelHill,NorthCarolinaUNIVERSITYOFNORTHCAROLINAObjectives.Thisstudycompares2measuresofeffectivedose,E1
2、990andE2007,for8dentoalveolarandmaxillofacialcone-beamcomputerizedtomography(CBCT)unitsanda64-slicemultidetectorCT(MDCT)unit.Studydesign.Averagetissue-absorbeddose,equivalentdose,andeffectivedosewerecalculatedusingthermoluminescentdosimeterchipsinaradiati
3、onanalogdosimetryphantom.Effectivedoseswerederivedusing1990andthesuperseding2007InternationalCommissiononRadiologicalProtection(ICRP)recommendations.Results.Large-fieldofview(FOV)CBCTE2007rangedfrom68to1,073Sv.Medium-FOVCBCTE2007rangedfrom70to560Sv,where
4、asasimilar-FOVMDCTproduced860Sv.TheE2007calculationswere23%to224%greaterthanE1990.Conclusions.The2007recommendationsoftheICRP,whichincludesalivaryglands,extrathoracicregion,andoralmucosainthecalculationofeffectivedose,resultinanupwardreassessmentoffatalc
5、ancerriskfromoralandmaxillofacialradiographicexaminations.DentalCBCTcanberecommendedasadose-sparingtechniqueincomparisonwithalternativemedicalCTscansforcommonoralandmaxillofacialradiographicimagingtasks.(OralSurgOralMedOralPatholOralRadiolEndod2008;xx:xxx
6、)Three-dimensional(3D)diagnosticimagingofthejawsdrivingmarketingofCBCTunitstodentistsisthehasbeenofinterestfromtheintroductionofcomput-potentialforreplacingalternativeimagingmodalitieserizedtomography(CT)asaclinicaltool.Becauseofsuchaspanoramicradiography
7、andcephalometricra-relativelyhighcost,highdose,andavailabilitylimiteddiography,withCBCTvolumesspecificallyrecon-tohospitalsandmedicalradiologypractices,useofthisstructedtosimulateorsupplantthoseconventionaltechnologyindentistryhasbeenrelegatedtoinvestiga-m
8、odalities.Althoughtheideaofreplacingmultipletionofneoplasiaorsignificantdevelopmentaldistur-dentalradiographicunitswithasingleuniversalimag-bance.Withtheintroductionofrelativelylow-costandingdeviceisseductive,concern
