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  4. 中山醫學大學附設醫院的Varian Clinac 21Ex醫用直線加速器(6, 10, 15,18 MeV)的中子通量及劑量估算
 
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中山醫學大學附設醫院的Varian Clinac 21Ex醫用直線加速器(6, 10, 15,18 MeV)的中子通量及劑量估算

  • Details
Project title
95學年度國家科學及技術委員會補助研究計畫
Acronym
專題研究計畫
Internal ID
NSC95-2623-7040-001-NU
Principal Investigator
Chen, Chien-Yi  
Status
research project
Start Date
January 1, 2006
End Date
December 31, 2006
Organizations
中山醫學大學醫學影像技術學系
Partner Organizations
National Science and Technology Council  
Project Web Site
https://www.grb.gov.tw/search/planDetail?id=1176814
Description
國內各醫學中心近年來加快裝設醫用直線加速器,進行強度調控放射治療,惟運轉中的高能加速器會有巨量中子自靶區外釋,造成治療室的中子輻射場大幅增加,並衍生放射性核種,這些高達15MV的linac對病人重要器官,工作人員所造成的等價劑量預期將極為可觀,本計畫以始活化法(threshold foil activation analysis)度量中山醫學大學附設醫院放射腫瘤科,15及6 MeV的Varian 21Ex醫用直線加速器內中子輻射及劑量,利用金片及銦片產生的115In(n,γ)116mIn,及197Au(n,γ)198Au反應,進行不同照野下的佈點,再以硼套包覆金片及銦片來測量各中子群能譜,最後以美國醫學物理學會轉換因子來估計中子劑量及運用 SAND II程式驗證各群中子場分布,進而對醫學中心之加速器現場提出必要的輻射防護建議。
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