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DiscussingtheapplicationvalueofCTandMRIinthediagnosisofpulmonarytuberculoma,soastoprovidean accuratebasisforitsclinicaltreatment. Materials and MethodsTheCTandMRIimagingdataof11casesofpulmonarytuberculomawhichconfirmedbyclinicwere collected.CTimagingdataincludedplainscanandenhancedscan,MRIimagingdataincludedplainscan,DWIandGadolinium-DTPAenhancedscan.Thentheimagingfeaturesofbothmethodswereanalyzed. Results11casesofpulmonarytuberculomaweresolitarylesion,3caseslocatedintheapicoposteriussegmentofupperlobeof leftlung,2caseslocatedinthedorsalsegmentoflowerlobeofleftlung,3caseslocatedintheapicaleorposteriussegmentof upperlobeofrightlung,1caselocatedintheanteriussegmentofupperlobeofrightlung,1caselocatedinthemiddlelobeof rightlung,1caselocatedintheposteriorbasalsegmentoflowerlobeofrightlung.Averagesizeofthesolitarylesionswere(1.8±0.55)cmindiameter.CTimaging:Plainscanshowedisodensityorslightlyhyperdense,5casesshowedhomogeneous density,6casesshowedheterogenousdensity.Enhancedscansshowednon-enhancement(5cases)ormildenhancement(5 cases)inthelesionsandcomputerizedtomographynumber(CTN)increasedlessthan10HU,1caseweresignificantlyenhanced, whichCTNincreasedby40Hu(internalpenetrationofvessel).MRIimaging:6casesofmaturetuberculomaweremadeupoftwo partsofthecoreringwallandnecrosis,theyperformedhypointensityinthecenterandhyperintensityorslightlyhyperintensity peripheralonT1WI,T2WIandDWIimage,hypointensityonADCimage.Gadolinium-DTPAcontrastenhancedscanswerethe edgethin-ringlikeenhancement,thecentralareawithoutenhancementormildenhancement.Therewere4casesofimmature tuberculomaandperformedhyperintensityorslightlyhyperintensityonT1WI,T2WIandDWIimage,hypointensityonADC image,andshowedtheedgethin-ringlikeenhancementindelayphase.Withtheextensionofenhancementtime,theedgethinringlike enhancementweremoreobvious.Comparisonoftwotypesofimagemethods:①calcification:TheMRIcouldnotconfirm calcificationinallcases;CTdetectedcalcification(punctate,strip)in3cases.②satellitenodule:BothofMRIandCTdetected satellitenodulein4cases,showedlowersignalT1WI,highsignalT2WI,ornodular,punctatelesions.③spiculatedborder:The MRIdetectedspiculatedborderin4cases,showedcuspateintheedgeoftuberculoma.CTdetectedspiculatedborderin5cases, showedstubbyspiculationin3casesandthick-longspiculationin2cases.④pleuralthickening:MRIshowedadjacentpleural thickeningin1cases,withpartofpleuralprotrusiondirectingtothelesion.CTshowedpleuralchangesin5cases,including adjacentpleuralthickening,shrinkage,andfiberstripconnectionbetweenthepleuraandtuberculoma.⑤Thehilarormediastinal lymphnodes:NeitherofMRIandCTfoundobviouslymphnodesenlargement.⑥capsular:Gadolinium-DTPAcontrastenhanced MRIshowedthin-ringlikeenhancementofthelesioninallcases.CTenhancedscansdetectedthin-ringlikeenhancementofthe lesionin4cases.⑦internalcavitation:CTandMRIdetectedinternalcavitationin3cases,whichshowedsmoothfracturelucency. ConclusionBothofCTandMRIhadgreatvalueinthediagnosisofpulmonarytuberculoma.CTweresusceptibletodisplay calcification.TypicaltuberculomacanbeaccuratelydiagnosedthroughCT,whichdisplayedasfollows:calcifiednoudlewith satellitenodule(nodular,strip)intheapicoposteriussegmentofupperlobeorinthedorsalsegmentoflowerlobeofthelung. Atypicaltuberculomahadnocharacteristicsabove,whichshowedsolitarynoduleandmightbemisdiagnosedasperipherallung cancerthroughCT.However,theMRIimaginghadadvantagesofnon-ionizingradiationandhighertissueresolutionratio, especiallyingadolinium-DTPAcontrastenhancedscan,tuberculomapresentedascharacteristicthin-ringlikeenhancement,which hasdifferentialdiagnosticvalueofatypicaltuberculomafromperipherallungcancer.