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題名:改良式軟片劑量驗證應用於強度調控放射線治療之先期研究     (20點)
A PRELIMINARY STUDY OF IMPROVED FILM DOSIMETRY FOR IMRT
著者:蔡忠宏(Chung-Hung Tsai) ;莊克士(Keh-Shih Chuang) ;戴宏旗(Hung-Chi Tai) ;周志成(Chih-Cheng Chou) ;蕭安成(An-Cheng Shiau) ;林芳仁(Fang-Jen Lin)
出版地區:台灣
出版城市:台北市
學科:醫學綜合
關鍵字:強度調控放射治療 ; 劑量驗證 ; 類神經網路 ; 軟片劑量量測 ; IMRT ; Dose verification ; Neural-net ; Film dosimetry
刊名:放射治療與腫瘤學
頁碼:53-62
語言:繁體中文
摘要: 中文摘要PDF ; 英文摘要PDF

且且:為7使軟片適用於強度調控放射治療( I M RT )多重角度入射,及動態性照野蠻化的劑量驗體特性,本研究針對射東與敵片平行排列時,照野與深度改變的情況下,如何正確將軟片光密度值正確轉換劑量,提供一套可行的辦法。 且越盟主注:利用數種材質的濾片與軟片之組合接受X光的照射,再以類神經網路將不同能贈與劑量之間的關係找出來,可以得到實際的劑量。 益是:經本系統"換的劑量值,在深度及~ij野蠻化的情況下,仍能有效轉換劑量至最大誤差小於±4% '平掏蜈差2 %左右,此為臨床上司接受之誠差lif!l圈。 益Ja:本實驗所提出之劑量鞠換方式,已能正確轉換劑量於射東和軟片平行排列及照野蠻化的情況,進一步將實際評估本系統在鷗床應用及多重照野(multiple field) 下的義現。
Purpose: Intensity Modulation Radiation Therapy (IMRT) is implemented using multiple beam orientations and varius field sizes. X-ray film can't be used as a dosimetry tool in such situation because of its serious energy dependent problem. We present and develop an improved method to overcome the circumstances. Materials and Methods: We used the combination of film with various filters (None, Pb, Cu, and AI) so that each film is irradiated to different energy spectrum. A neural-network is employed to relate the actual dose and energy spectra. After calibration and training, the optical densities of the four films can be input to the network to yield the actual dose at any location. Results: The PDD of a 20 x 20 field size and the dose distribution of an off-axis location at 5cm are estimated using this trained neural network. The maximum differences between the measurements of this film system and ionization chamber were less than ±4%, and less than 2% for the mean error in our investigation. Conclusion: Optical density and dose relationship can be found and converted by our neural-net system. For the future studies, we will focus on clinical application of these experimental results and extend the concept to multiple beam orientations.


    

本卷期目次
放射治療與腫瘤學
Definitive Radiotherapy for the Patients with Prostatic Adenocarcinoma: Analysis of Short-Term Outcome and Prognostic Factors/ Shena Yu-Hsuan ChenJason Chia-Hsien ChengStella Y. TsaiSkye Hon-Giun ChengDaniel S. ChangAlex Lien-Yen YangJames Jer-Min Jian
Preperative Radiotherapy Concurrent with Chemotherpy for Locally Advaced Rectal Cancer/ Yu-Xuan ChenWilliamChenMu-Tai LiuChih-Yuang ChungCheng-Shyong ChangGer-Hau HsuHong-Chang ChenTung-Hao ChangChu-Ping PiChih-Chiech Hsu
AAPMTG-51號議定書光子與電子劑量計算程式/ 郭力誠鄭秀成游浚彥陳妙芬陳文政
雙盲對照實驗評估口服pilocarpine對放射線治療引起頭頸部癌症病患口乾症於馬偕醫院之使用主觀效果及安全性報告/ 陳舜鼎張國華陳裕仁鍾昌宏吳孟浩蘇文浩陳虹汶賴允亮
Preoperative Radiotherapy and Chemotherapy for Low or Locally Advaced Rectal Cancer/ I-Chun YehHelen H.W. ChenJeng-Chang LeeWu-Chou SuHong-Ming TsaiHenry W.C. Leung
固定深度治療對直腸肛門癌放射治療的影響/ 曾雁明范綱行白冰清蔡介生林倩伃陳臣苑曾振淦
改良式軟片劑量驗證應用於強度調控放射線治療之先期研究/ 蔡忠宏莊克士戴宏旗周志成蕭安成林芳仁
DEFINITIVE RADIOTHERAPY FOR THE PATIENTS WITH PROSTATIC ADENOCARCINOMA: ANALYSIS OF SHORT-TERM OUTCOME AND PROGNOSTIC FACTORS/ Shena Yu-Hsuan ChenJason Chia-Hsien ChengStella Y TsaiSkye Hongiun ChengDaniel S ChangAlex Lien-Yen YangJames Jer-Min Jian
雙盲對照實驗評估口服pilocarpine對放射線治療引起頭頸部癌症病患口乾症於馬偕醫院之使用主觀效果及安全性報告/ 陳舜鼎張國華陳裕仁鍾昌宏吳孟浩蘇文浩陳虹汶賴允亮
PREOPERATIVE RADIOTHERAPY CONCURRENT WITH CHEMOTHERAPY FOR LOCALLY ADVANCED RECTAL CANCER/ Yu-Xuan ChenWilliam ChenMu-Tai LiuChih-Yuang ChungCheng-Shyong ChangGer-Hau HsuHong-Chang ChenTung-Hao ChangChu-Ping PiChih-Chiech Hsu
PREOPERATIVE RADIOTHERAPY AND CHEMOTHERAPY FOR LOW OR LOCALLY ADVANCED RECTAL CANCER/ I-Chun YehHelen H. W. ChenJeng-Chang LeeWu-Chou SuHong-Ming TsaiHenry W. C. Leung
固定深度治療對直腸肛門癌放射治療的影響/ 曾雁明范綱行白冰清蔡介生林倩?陳臣苑曾振淦
AAPMTG-51號議定書光子與電子劑量計算程式/ 郭力誠鄭秀成游浚彥陳妙芬陳文政
改良式軟片劑量驗證應用於強度調控放射線治療之先期研究/ 蔡忠宏莊克士戴宏旗周志成蕭安成林芳仁
 
   
 
   

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