Determination of Mercury Attenuation Coefficient for Mercury Shielding for Radiotherapy Patients
[摘要] BackgroundandObjective:Theaimofradiotherapyisdeliverenoughdosestothetumorandprotectingorgansatriskthatarearoundthetumor.Inordertogetappropriatedosedistributiononecanuseradiationmodifiersandcompensators.Soknowingattenuationcoefficientofabsorbersisnecessaryfortreatmentcalculations.MaterialsandMethods:Inthisstudymercurywasintroducedassuitablematerialforradiotherapyshielding.Anewmethodispresentedbyphysicsofinteractionofphotonwithmatterandcomplexintegrationcalculationtocalculateattenuationcoefficientforanymaterialwithdifferentthicknessandenergies.Results:Radiationqualitychangeswiththicknessofabsorberandthisvariationweresignificant.However,changesinfieldsizesdidnotproduceanysignificantvariations.Conclusions:Variationofattenuationcoefficientwiththicknessofabsorbercannotbeignoredanditisnecessaryforaccurateradiotherapytreatment.Ontheotherhandusingonenumberasanattenuationcoefficientforradiotherapycompensatorsormodifiersisnotaccurateenoughandvariationofattenuationcoefficientwiththicknessofabsorbermustbeconsideredinradiotherapytreatmentplanningsystems.
[发布日期] [发布机构]
[效力级别] [学科分类] 基础医学
[关键词] [时效性]
