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研究生: 許丕源
Hsu, Pi-Yuan
論文名稱: 光刺激發光眼球劑量計之劑量評估演算法開發與驗證
Development and Validation of Dose Evaluation Algorithm for Optical Stimulation and Luminescence Eye Lens Dosimeter
指導教授: 許芳裕
Hsu, Fang-Yuh
許靖涵
Hsu, Ching-Han
口試委員: 趙自強
CHAO, TSI-CHIAN
游澄清
Yu, Cheng-Ching
學位類別: 碩士
Master
系所名稱: 原子科學院 - 生醫工程與環境科學系
Department of Biomedical Engineering and Environmental Sciences
論文出版年: 2024
畢業學年度: 112
語文別: 中文
論文頁數: 81
中文關鍵詞: 光激發光劑量計劑量評估光子與電子混和場眼球劑量計
外文關鍵詞: Optical Stimulation Luminescence Dosimeter, Dose Assessment, Mixed Photon and Electron Fields, Eye Lens Dosimeter
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  • 隨著國際和國內對眼球水晶體劑量限值的不斷降低,對眼球劑量風險的重視逐漸增加。本研究的主要目的是開發並驗證一種新的劑量評估算法,用於處理光子與電子混合場中的輻射劑量計算,並通過測試舉辦的能力試驗。本研究選用了Al2O3:C 和 BeO 兩種 OSLD 材料,並依據 ANSI/HPS N13.11:2022 標準進行測試。結果顯示,這兩種材料均能通過高劑量級光子、一般級光子、電子場及光子與電子混合場的大部份類別測試。尤其針對光子與電子混合場,本研究開發的新型算法成功克服了多種射質帶來的劑量評估複雜性,實現了準確的劑量測量。研究結果表明,這些劑量計在測試中均表現出良好的再現性和均勻性,為未來的眼球劑量監測提供了可靠的工具。


    With the continuous reduction of dose limits for the eye lens both internationally and domestically, the importance of eye dose risk has been increasingly recognized. The primary objective of this study is to develop and validate a new dose assessment algorithm for calculating radiation doses in mixed photon and electron fields and to pass the proficiency test conducted in this context. This study utilized two types of OSLD materials, Al2O3:C and BeO, and conducted tests according to the ANSI/HPS N13.11:2022 standard. The results indicate that both materials successfully passed most test categories, including high-dose photon fields, general photon fields, electron fields, and mixed photon and electron fields. Notably, for mixed photon and electron fields, the newly developed algorithm effectively addressed the complexity of dose assessment posed by multiple radiation qualities, achieving accurate dose measurements. The study demonstrates that these dosimeters exhibit good reproducibility and uniformity in tests, providing reliable tools for future eye dose monitoring.

    中文摘要 1 Abstract 2 致謝 3 目錄 4 表目錄 6 圖目錄 8 第一章 緒論 11 1.1前言 11 1.2 OSLD原理概述 12 1.2.1 OSL原理 12 1.2.2 兩種OSLD的材料 13 1.3眼球劑量計介紹 13 1.4文獻回顧 16 1.4.1 OSLD的發展 16 1.4.2 OSLD度量輻射的種類 16 1.5研究動機 17 第二章 材料與方法 19 2.1 蒙地卡羅模擬(Monte Carlo method) 19 2.1.1 蒙地卡羅法 19 2.1.2 蒙地卡羅程式(MCNP5) 19 2.1.3 OSLD模擬光子過程 19 2.1.4 OSLD模擬電子過程 23 2.1.5 OSLD修正能量依存性 24 2.2 劑量計特性之研究方法 26 2.2.1 劑量計之再現性與均勻性 26 2.2.2 劑量計之篩選 27 2.2.3 劑量計校正與驗證之照射場所 28 2.2.4 劑量計之校正 32 2.3 劑量計和測量系統 32 2.3.1自製Al₂O₃:C雙晶片劑量計與測量系統 32 2.3.2 BeO劑量計與測量系統 36 2.4 光激發光眼球劑量計能力試驗 38 2.4.1光激發光眼球劑量計能力試驗說明 38 2.4.2 劑量評估流程 43 2.4.3 第IV類光子與電子混和場之Al2O3:C劑量計演算法 46 2.4.4 第IV類光子與電子混和場之BeO劑量計演算法 50 第三章 結果與討論 53 3.1 蒙地卡羅(MCNP)模擬結果 53 3.1.1 Al2O3:C使用R1/R2判斷能量之模擬 53 3.1.2 Al2O3:C能量依存性之模擬 55 3.1.3 BeO能量依存性之模擬 60 3.2 光激發光劑量計之特性實驗結果 63 3.2.1兩種材料於再現性的表現 63 3.2.2 兩種材料於均勻性的表現 65 3.2.3 光激發光劑量計之劑量校正曲線 67 3.2.4 計讀儀的穩定性測試 69 3.3 眼球水晶體劑量計盲樣驗證結果 70 3.3.1 第I類高劑量光子場盲樣驗證結果 70 3.3.2 第II類光子場盲樣驗證結果 71 3.3.3 第III類電子場盲樣驗證結果 74 3.3.4 第IV類光子與電子混和場盲樣驗證結果 75 第四章 結論 78 參考文獻 79

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