電子射野影像系統(tǒng)對(duì)鼻咽癌調(diào)強(qiáng)放療擺位誤差的測量.pdf

1、中國醫(yī)科大學(xué)碩士學(xué)位論文電子射野影像系統(tǒng)對(duì)鼻咽癌調(diào)強(qiáng)放療擺位誤差的測量姓名：郭根燕申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：腫瘤學(xué)指導(dǎo)教師：劉曉嵐20100301英文結(jié)構(gòu)式摘要ElectronicportalimagingdeviceinsetupverificationinintensitymodulatedradiationtherapyfornasopharyngealcarcinomaobjfectiveToinvestigatethesetup

2、verificationusingelectronicportalimagingfornasopharyngealcarcinomaintensitymodulatedradiation(IMRT)Methods15patientswereenrolledinstudyElectronicportalimages(EPI)wereacquiredinfirst3daysandonceeveryweekduringtheradiation

3、courseandatotal194anteriororlateralisocentricEPlwerecomparedtodigitallyreconstructedradiograph(DRR)usingelectronicportalimagingdevice(EPID)，sixdirectional(1eft—L，rightR，headH，footF，anteriorA，postP)setuperrorscanbeacquire

4、dResultAbout9021％ofalltranslationalsetuperrorswere_2mm，9863％3mm，and100％5ramTheoverallsystematicerrorwas一06ram(088s)inLdirection，O58rain(士102s)，inR—direction008mm(士O71s)，inHdirection021ram(士O54s)inFdirection000mill(士112S)

5、inA—direction000ram(士097s)inP—directionThecorrespondingSoftherandomerrorswere士O55，士o45，：tO56，士O52，圭O48，士O43mmTheestimatedmarginsrequiredforCTV—PTVwerecalculatedaccordingtothevanHerkformulawas259，285，217，172，315，272mm，res