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RadiodiagnosisintheCirculatorySystem循环系统X线诊断贵州省人民医院放射科唐雷Section1TheHeart1.TypesofHeartinthePlainFilmsInthenormalcondition,aheartoftenappearsinthehorizontal(横型),oblique(斜型),andpendulous(悬垂型)typerespectivelyonaposteroanteriorradiographoftheheart.Theangleofthecardiacaxis(心轴角):itisanacuteangleformedbyalinefromtheconjunctionofthegreatvessulesoftherightcardiacborderandtherightatrium(心房)
tothecardiacapex(心尖)
andahorizontallinewhichpassesthroughthecardiacapex.心轴角:右心缘大血管与右房交界点至心尖的连线,与水平线的夹角。Thehorizontaltype(横型)<45°(32°~35°)Theobliquetype(斜型)=45°(43°~45°)Thependuloustype(悬垂型)>45°(52°~55°)ThreetypesoftheheartintheplainfilmInthepathologicalstates,theheartcanbedeformedinthemitral(二尖瓣型),aortic(主动脉型),andgeneralenlarged(普大型)typeseparately.Atypeoftheheartcanderivefromseveralheartdiseases.Forexample,Themitraltypeoftheheartmayoriginatefrompulmonaryheartdiseases,rheumaticheartdiseases,congenitalheartdiseasesofshuntfromlefttoright.Theaortictypeoftheheartmaycomefromhypertensiveheartdiseases,rheumaticheartdiseases(involingaorticvalves),congenitalheartdiseases,cardiomyopathy.Thegeneralenlargedtypeoftheheartmaycomefromcardiomyopathy,pericardialeffusion.2.DifferentroutineprojectionsofthecardiacatriaandventriclesPA:posteroanteriorradiograph(后前位)LL:leftlateralradiograph(左侧位)RAO:rightanteriorobliqueradiograph(右前斜位)LAO:leftanteriorobliqueradiograph(左前斜位)PA:posteroanteriorradiograph(后前位)LL:leftlateralradiograph(左侧位)RAO:rightanteriorobliqueradiograph(右前斜位)cardiacatriaaredistinguishedfromcardiacventricles.Twocardiacatrialocateintheposteriorsuperiorpartoftheheartandtwocardiacventriclesoverlapandsettledownintheanteriorinferiorpartoftheheart.LAO:leftanteriorobliqueradiograph(左前斜位)theshadowoftheheartisdividedintotwohalvesoftherightheartandleftone.Therightonestaysinthefrontandtheleftonerestsontheback.3.Thecardiothoracicratio(心胸比率)Calculationofthecardiothoracicratiohasbeenthesimplestandmostfrequentlyusedmethodformeasurementoftheheart.Thecardiothoracicratio=(A+B)/CTheratioisdefinedasthevalueofthetransversedimensionoftheheartdividedbytheinnnerdimensionofthethoraciccavityatthelevelofcrossingthedomeoftherighthemidiaphragm.Relationbetweensizeoftheheartandthecardiothracicratio:Normalheartlessthan0.52Slightenlargement0.52~0.55Moderateenlargement0.56~0.60Severeenlargementmorethan0.604.ChangesofpulmonarybloodPulmonaryarterialpleonaemia(肺充血):meansthatpulmonaryarterieshavebeenbroadenedinallitstrunksandbranches.
Pulmonaryvenouspleonaemia(肺淤血):referstothesituationthatexcessivebloodstagnatesinthepulmonaryveins.So,thelungfieldshaveanattenuatedradiolucencyandseemlikegroundglass.5.Pulmonaryedema(肺水肿)Ininterstitialedema(间质性肺水肿),bothpulmonaryhilaexhibitenlargementandhazyshadows.Thelungmarkingsappearabundantwithfuzzymargins.Theseblurtheborderoftheheartassociatedwithdilationofbilateralupperpulmonaryveins.Inalveolaredema(肺泡性肺水肿),therearelargepatchyopacitiessurroundingthepulmonaryhilaintheshapeofabutterfly.Theshadowsofthearchesfadeoutintheheart.CasesintheHeartCase1.正常心脏三位片Thethoraciccageremainssymmetrical.Alltheseenbonesarenothingremarkable.Thetrachealocatescentrallywithoutdeviation.Thelungsareclear,whilethelungmarkingsarenaturalandregular.Bothpulmonaryhilashowneitherenlargementnordecrease.Theheartandgreatvesselsappearnormalintheirposition,sizeandshape.Thecardiothoracicratiois0.48,andalltheshadowsofthearchesshownaturallyinthemarginsoftheheart.Thediaphragmhasasmoothsurfacewithsharpcostophrenicangles.OntheLLradiograph,thespacesexistintheprecardiacandretrocardiacclearances.Thereisnosignificantchangeintheshadowsofthearchesoftheheart.OntheRAOradiograph,alltheshadowsofthearchesappearclearandnatureintheheart.Thereisnocompressivedisplacementintheesophagus.Nothingisremarkableintheprecardiacandretrocardiacapaces.Diagnosis:Normalinthelungs,heart,anddiaphragm.Case1.正常心脏三位片Case2.风湿性心脏病Thelungfieldshaveanattenuatedradiolucency.Thelungmarkingsexhibitthickeningsanddistortionswithblurrededgesandseemlikegroundglass.Bothpulmonaryhilaareenlarged,andthediameteroftherightinferiorartery(右下肺动脉)totals1.8cmwiththesignofresidualroot(残根征).Theheartappearsinthemitraltype(二尖瓣型).Theshadowoftheheartextendsonbothsidesinthecardiothroacicratioof0.65.Thereare4archesintheleftmargin(四弧征),whiledualbows(双房影)intherightmarginoftheheart.Theangleisalmost90°betweenthetwomainbronchi.OntheLLradiograph,theclearancesareclosedinbothprecardiacandretrocardiacspacesduetoenlargementoftheheart.Theenlargedleftatriumcompressestheesophagustoformanindentation.OntheRAOview,theprecardiacandretrocardiacspacesareenclosed.Theenlargedheartpushestheesophagusbackward,forminganarchindentationintheesophagusandoverlapswiththespinalcolumn.Meanwhile,thesegmentofthepulmonaryarterybulgessignificantly.
Diagnosis:Rheumaticheartdisease.FurtherexaminationisneededbyheartDopplerul
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