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ID:32746373
大小:2.48 MB
页数:36页
时间:2019-02-15
《碳纤维腹板在直肠癌患者术后简单调强放疗中对正常组织剂量分布影响》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、摘要目的:研究碳纤维腹板在直肠癌术后患者简单调强放疗中对盆腔周围正常组织器官照射剂量分布的影响及放疗过程毒性反应。方法:收集直肠癌术后放疗患者20例,20例患者均行俯卧位腹板固定(A组)和俯卧位真空袋固定(B组),两组体位固定方式分别行两次CT定位扫描,按简单调强放疗计划设计,95%的计划靶区体积处方剂量为45Gy/25次。比较两组计划靶区、小肠、膀胱及股骨头的剂量.体积直方图。再将20例患者随机分成腹板固定(A1组)和真空袋固定(B1组)各10例进行放疗,并观察、记录两组患者治疗过程中的急性放疗反应。
2、结果:A、B组总计划靶区、总小肠体积、总膀胱体积无明显统计学差异(P>0.05),但两组小肠中位剂量照射体积、10%一100%的各等剂量射线包绕的小肠体积,膀胱中位剂量体积及30—100%各等剂量射线包绕的膀胱体积均明显减少,差异有统计学意义(P<0.05),放疗结束A1组患者血红蛋白下降19.99/L,B1组患者血红蛋白下降25.99/L。两组患者无因III度以上胃肠道不良反应而终止放疗。结论:使用碳纤维腹板能减少直肠癌术后简单调强放疗的小肠及充盈的膀胱受照射剂量,减慢血红蛋白下降速度,有临床使用价值
3、。关键词:直肠癌碳纤维腹板简单调强AbstractABSTRACTobjective:Toinvestigationtheeffectofcarbonfiberbellyboardonvolumeanddosedistributionofnormaltissuearoundthepelvicorgansinpatientswithrectalcancerundergoingpostoperativesimpleintensity—modulatedradiationtherapyandradiation
4、toxicityreaction.Methods:Thisstudyenrolled20patientswithrectalcancerwhohadundergonepriorpelvicoperation.take20patientsallappliedthebellyboardwithpronepositionweredefinedgroupAandothersappliedthevacuumbagwithproneweredefinedgroupB,patientsinbothgroupunder
5、wenttwosetsofCTSCan,allthepatientsreceivedsimplifiedintensitymodulatedradiationtherapyplanningdesign,andtheprescriptiveradiationdosageof95%ofthePTV(PlanningTargetVolume)targetvolumewas45Gy/25times.comparedbetweenthetwogroupsPTV,smallbowel,bladderdosevolu
6、mehistogram.Randomlychoosing10patientsfromthe20patientsintobellyboard(groupA1)andvacuumbag(groupB1)withradiotherapy,respectively.Toobserveandrecordedacuteradiationreactionoftwogrouppatientsduringradiotherapyprocedure.Results:NodifferencebetweengroupA,Bwa
7、sfoundoftotalPlanningTargetVolume,smallintestinevolumeandbladdervolume(P>0.05),Themeandoseofsmallintestineandbladder,thevolumeofsmallintestineirradiatedat1O一100%doselevelsandthevolumeofbladderirradiatedat30—100%doselevelsweresignificantlydecreasedingroup
8、AcomparingtogroupB(P<0.05).Endofradiotherapy,thehemoglobinfe¨by19.9g/Land25.9g/LingroupA1andgroupB1,respectively,.Nopatientsterminationofradiotherapyowinggrade3degreesgastrointestinaladversereaction.Conclusions:Theapplicat
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