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肿瘤放射治疗学概论ppt课件.ppt

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肿瘤放射治疗学概论（RadiationOncology）Radiotherapyisoneofthreemajortreatmentmeanstotreatmalignanttumors,about60%-80%patientsacceptedradiotherapyindifferentstages. Contributionofthreemajortreatmentmeansfortumorcontrolrate1.ConceptionofRadiationOncology2.HistoryofRadiationOncology2DRT3.ThemaincontentofRadiationOncology3.1Objective3.2Radiationmodality4.Radiobiology4.1Biologicaleffectsofionizingradiation4.2Fractionatedirradiationisthebiologicalbasisforclinicalradiotherapy4.3PhysicaldoseandBiologicaldose4.4放射敏感性Radiosensitivity4.5TolerancedoseirradiationnormaltissueTolerancedoseirradiationnormaltissue4.6Radiation-inducedsecondcarcinogenesis4.7Effectsfactorsofradiotherapy5.Radiophysics5.1TypesofRaysjizhongDosedistributionofLETRay5.2TreatmentEquipmentsofRadiotherapyAuxiliaryequipment二维放疗(ERBT)5.3Preciseradiotherapeutictechnique5.3.13-DimensionalConformalRadiationtherapy,3D-CRT3-DCRT5.3.2IntensityModulationRadiationTherapy,IMRTIMRT5.4Breachtherapy特点1.置入并固定施源器5.5Specialirradiation:5.5.1术中放疗（Intraoperativeradiationtherapy,IORT）RadiobiologicalEffect：Characteristicsofclinicalapplication5.5.2:HyperthermiaBiologicaleffectsofhyperthermiaandradiotherapy5.5.3:Stereotacticradiotherapy:X(γ)KnifeSummary