食道癌放射治療中擺位誤差對劑量影響的研究.pdf

1、東南大學碩士學位論文食道癌放射治療中擺位誤差對劑量影響的研究姓名：錢德軍申請學位級別：碩士專業(yè)：生物醫(yī)學工程指導教師：趙興群翟振宇20090501東南大學碩士論文AbstractTheadvantageof3DimensionalConformalRadiotherapyandIntensityModulatedRadiotherapyisthattheycanirradiatethetunlorsitebetterandmakeitp

2、ossibletoprotecttheorgansurroundingthetargetButanyway，becauseoftheexistenceofsetuperrorsmadeintheactualtreatmentofpatientswitheffectivedoseandpositioningwhendifferencesmustexistInthisstudy，suchasthroughmobilecentererrors

3、imulationsystemtostudythesystematicelrorsinesophagealcancerradiotherapydosedistributionontheimpactofesophageallesionscomparednarrower，widerandlongerthreeconditionsoftargetandnormaltissuedosebypositioningerrorimpactsensit

4、ivityAccordingtotheabovethreesituations，eacheaseseparatelyselectthe6patients，eachpatientseparatelytodowiththecenterand3fieldswiththeplantogroup5Treatmentplanningsystematthemobilecenter，assumingthatateachtreatmentbeamallh

5、avethesamedirectiontooffsetthesituationnamely，threedimensionalsimulationofeightdirectiOIlSon8mmand12mmWithoutchangingthebeamdistributionandtheweightofcircumstances，tore—calculatethewholedistributionofagentsAnalysisofthem

6、obile，suchastheCenterofthedoseassessmentofallindicatorsandindicatorsofaformalplantothecorrespondingratio，whichcomparedthreedifferentplanstoworkersaffectedgroupbythesystemerrorsensitivityThroughthisstudy，wecansee：esophage

7、alcanceratthreedimensionalconformalradiationtherapyinthedifferentlesionsizeCTVtoPTVborders10mmCantargetrequirementsLungtissuebysetuperrorshavelittleeffectLesionsnarrowerpositioningerrorwillnotcauseexcessspinalcord，butawi

8、denumberoftimefrequencyanalysisoflesionsinthesimulationwecanseethecasehasmorethan50％ofspinalcordtolerancedoseRadiationfieldofdifferentsettingsonthetargetandnormaltissuedoseshavelittleeffectKeywords：EsophaguscancerSetuper