查詢結果分析
相關文獻
- Evaluation of Radiation-sensitive Composite Gels in Clinical Dose Verification
- 硬脊膜外麻醉導致下半身癱瘓:病例報告
- Gadolinium-Enhanced MRI in Neuro-Behcet Disease
- Magnetic Resonance Images of Neuronal Migration Anomalies
- 擴散影像在腦缺血及梗塞診斷上的應用價值
- Lumbar Synovial Cysts: Magnetic Resonance Imaging Evaluation
- Orbital Invasion in Nasopharyngeal Carcinoma: Evaluation with Computed Tomography and Magnetic Resonance Imaging
- Primary Cardiac Tumors: Report of Two Cases
- Magnetic Resonance Imaging Features of Neuro-Behcet's Disease: A Case Report
- A Rotational Phantom for Evaluation of MR-Compatible Biopsy Devices: Experiment and Preliminary Observations
頁籤選單縮合
題 名 | Evaluation of Radiation-sensitive Composite Gels in Clinical Dose Verification=應用於臨床劑量驗證的輻射敏感性組合凝膠之評估 |
---|---|
作 者 | 陳妍利; 謝栢滄; 徐惠麗; 謝玲鈴; | 書刊名 | 中華放射線技術學雜誌 |
卷 期 | 39:1 2015.03[民104.03] |
頁 次 | 頁46-51 |
分類號 | 414.93 |
關鍵詞 | 輻射敏感組合凝膠; 磁振造影; 伽瑪演算; Radiation-sensitive composite gels; NIPAM; BANG®; MRI; Gamma evaluation; |
語 文 | 英文(English) |
中文摘要 | 本研究探討輻射敏感性組合凝膠經由輻射照射誘發化學變化,並搭配磁振造影量測技術作為三維凝膠劑量計可行性評估。比較兩種輻射敏感性組合凝膠-BANG®-3及NIPAM(N-isopropylacrylamid)在不同深度劑量差異性及採用伽瑪演算法計算伽瑪通過率。研究結果顯示商品化BANG®-3凝膠於不同深度之劑量差異為0.58%~5.68%,而客製化NIPAM凝膠則為0.31%~1.13%。另外,伽瑪演算法以3%/3 mm的可接受條件下評估劑量剖面的通過率,兩種凝膠在深度40 mm深度位置的通過率都可達到95%以上。在30 mm~70 mm的深度,伽瑪劑量通過率亦可保持在95%以上。然而BANG®-3凝膠由於容器邊緣產生氧擴散效應,抑制凝膠聚合反應現象較明顯,因此在容器邊緣附近劑量具較低通過率。研究結果發現客製化NIPAM凝膠與商品化BANG®-3凝膠均具有好的劑量準確性,適用於放射治療中例行性的三維劑量劑量驗證。 |
英文摘要 | Radiation-induced chemical changes in the radiation-sensitive composite gels used in three-dimensional dosimeters were investigated associated with magnetic resonance imaging (MRI) in this study. Dose accuracy was quantitatively evaluated to compare two radiation-sensitive composite materials using the gamma evaluation technique. Dose discrepancies at various depths were also evaluated. The dose differences varied from 0.58% to 5.68% for commercial BANG®-3 gel and 0.31% to 1.13% for NIPAM (N-isopropylacrylamide) gel. Gamma evaluation of the planar dose profile resulted in pass rates all exceeding 95% for BANG®-3 and NIPAM gels at 40 mm depth when 3%/3 mm acceptance criterion was used in the axial plane. Gamma pass rates over 95% were also maintained at depths of 30 mm to 70 mm for the two gels. However, BANG®-3 gel exerted a slight obvious oxygen diffusion effect through the container cap, inhibiting polymerization and thus, producing lower pass rate near the edge of container. The validation of NIPAM gel and commercial BANG®-3 gel confirmed their suitability for routine use in the three-dimensional dose verification of radiotherapy. |
本系統中英文摘要資訊取自各篇刊載內容。