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| 題 名 | Verification of Patient Setup Error in Tomotherapy through Image Guided Radiation Therapy (IGRT) Procedure=以導航螺旋式光子刀之影像導引放射治療程序驗證病患定位誤差 |
|---|---|
| 作 者 | 李紹禔; 劉文山; 周英香; 熊佩韋; 許琇婷; 張席昌; | 書刊名 | 放射治療與腫瘤學 |
| 卷 期 | 15:2 2008.06[民97.06] |
| 頁 次 | 頁119-128 |
| 分類號 | 416.36 |
| 關鍵詞 | 導航螺旋式光子刀; 病患定位誤差; 影像導引放射治療; Tomotherapy; Patient setup error; Image-guided radiation therapy IGRT; |
| 語 文 | 英文(English) |
| 中文摘要 | 目的:以百萬伏特電腦斷層掃描(MVCT)評估導航螺旋式光子刀(Tomo Therapy)在不同治療部位的間次定位誤差。材料與方法:本研究取樣自13名進行導航螺旋式光子刀治療的病人。其中分別7位是頭頸部腫瘤,3位患部位於胸腔部,其他3位則是骨盆腔部。獨立分析這三組病人資料。以每日的MVCT影像與初始三維模擬的KVCT影像做比較,以評估間次定位誤差。以自動與手動兩種方式判讀誤差。結果:208個頭頸部單日MVCT檢測值:平均變位橫向為0.3±2.3 mm,縱向為0.0±2.6 mm,垂直向為2.3±1.8 mm,縱軸轉動平均為0.6±0.9 度;80個胸腔部單日MVCT檢測值:平均變位橫向為-0.4±2.4 mm,縱向為-2.6±2.9 mm,垂直向為2.5±3.9 mm,縱軸轉動平均為0.4±0.5 度;76個骨盆腔部單日MVCT檢測平均值:變位橫向為0.3±3.9 mm,縱向為-2.4±4.8 mm,垂直向為8.3±4.3 mm,縱軸轉動平均為0.4±0.3度。除了z方向之外,變位的模式均為隨機分布。結論:除了骨盆腔部位腫瘤組z方向外,分析在不同部位與各方向的數據,自動與手動方法無顯著差異。 |
| 英文摘要 | Purpose: To evaluate the interfraction setup errors in different treatment sites with Tomotherapy by mega-voltage computerized tomography (MVCT). Materials and Methods: This study included 13 patients underwent radiotherapy with Tomotherapy. There were 7, 3 and 3 patients belonged to head and neck cancer, thoracic and pelvis cancer, respectively. These three subgroups were analyzed separately. The interfraction setup errors were evaluated by comparing daily series MVCT with initial simulation KVCT three dimensionally. Both automatic and manual methods were used for determination of these errors. Results: For 208 daily MVCT check-up for head and neck tumor, average shift was 0.3±2.3 mm for lateral direction (x), 0.0±2.6 mm for longitudinal direction (y), 2.3±1.8 mm for vertical direction (z), and 0.6±0.9 degree for longitudinal axis (roll) rotation. For 80 daily MVCT check-up for thoracic tumor, average shift was -0.4±2.4 mm for x direction, -2.6±2.9 mm for y-direction, 2.5±3.9 mm for z-direction, and 0.4±0.5 degree for roll axis rotation. For 76 daily MVCT check-up for pelvic tumor, average shift was 0.3±3.9 mm for x direction, -2.4±4.8 mm for y-direction, 8.3±4.3 mm for z-direction, and 0.4±0.3 degree for roll axis rotation. The pattern of shifts showed a random distribution except z direction. Conclusion: Except from z-direction of pelvic tumor, there was no significant difference between automatic and manual methods among different treatment sites and different direction errors. |
本系統中英文摘要資訊取自各篇刊載內容。