1AtlasesforOrgansatRisk(OARs)inThoracicRadiationTherapy放疗中胸部危机器官勾画Feng-Ming(Spring)KongMDPhDLeslieQuintMDMitchellMachtayMDJeffreyBradleyMD第一页，共一百零九页。2OutlineofContent•Atlasforlung,esophagus,andspinalcord•肺、食管、脊髓的勾画•Atlasforbrachialplexus•臂丛神经的勾画•Atlasforproximalbronchialtree•近端支气管树的勾画•Atlasforchestwall•胸壁的勾画•Atlasforpericardium,heartandgreatvessels(includingnormalpericardialrecesses)•心包、心脏、大血管〔包括正常心包凹陷〕的勾画第二页，共一百零九页。3RTOG1106RequiredOARsStructureDescriptionStructuredefinitionandcontouringinstructionsLungLungs–PreGTV(compositeofCT1GTVandPETMTV)Bothlungsshouldbecontouredusingpulmonarywindows.Therightandleftlungscanbecontouredseparately,buttheyshouldbeconsideredasonestructureforlungdosimetry.Allinflatedandcollapsed,fibroticandemphysematiclungsshouldbecontoured,smallvesselsextendingbeyondthehilarregionsshouldbeincluded;however,preGTV,hilarsandtrachea/mainbronchusshouldnotbeincludedinthisstructure.HeartHeart&PericardiumTheheartwillbecontouredalongwiththepericardialsac.Thesuperioraspect(orbase)willbeginattheleveloftheinferioraspectofthepulmonaryarterypassingthemidlineandextendinferiorlytotheapexoftheheart.EsophagusEsophagusTheesophagusshouldbecontouredfromthebeginningattheleveljustbelowthecricoidtoitsentrancetothestomachatGEjunction.Theesophaguswillbecontouredusingmediastinalwindow/levelonCTtocorrespondtothemucosal,submucosa,andallmuscularlayersouttothefattyadventitia.SpinalcordSpinalCanalThespinalcordwillbecontouredbasedonthebonylimitsofthespinalcanal.Thespinalcordshouldbecontouredstartingattheleveljustbelowcricoid(baseofskullforapextumors)andcontinuingoneveryCTslicetothebottomofL2.Neuroformaninesshouldnotbeincluded.BrachialplexBrachialPlexusThisisonlyrequiredforpatientswithtumorsofupperlobes.Onlytheipsilateralbrachialplexisrequired.ThiswillincludethespinalnervesexitingtheneuroforaminefromtopofC5totopofT2.IncontrasttopriorRTOGlungstudiesofcontouringthemajortrunksofthebrach...
