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1
題名:Leipzig Applicators之劑量特性     (10點)
The Dosimetry Characteristics of Leipzig Applicators
著者:黃英明(Ing-Ming Hwang) ;郭珍妮(Jenny Que) ;陳海雯(Helen H. W. Chen) ;王裕文(Yu-Wen Wang)
出版地區:台灣
出版城市:台北市
學科:醫學綜合
關鍵字:近接治療 ; 劑量學 ; Brachytherapy ; Leipzig applicator ; Dosimetry
刊名:放射治療與腫瘤學
頁碼:133-137
語言:繁體中文
摘要: 中文摘要PDF ; 英文摘要PDF

且且: Leipzig Appli cators 為N u cl etro n M ic舟Se l ectron 凹I r 高劑量讓後荷治療機配件之一, 依射源之方位可分為直立式及水平式二種型式,又依其口徑大小各可分為一、二及三公分之裝療管。為了解此型裝療管的臨床劑量學特性.*實驗將量測草種特性, 外別為: 幾何結構、相對編出、百分深度劑量、等劑量至于佈曲線及真實矢狀面輻射洩漏情形。 扭扭舉主法: 以高精密度游標尺量取各裝療管之幾何結構。相對輸出則以H N . E . 0 . 0 3 c c 平板型(lype : 2 5 34) 游離腔連接l onex Dosemaster 259 0 電位計, 加上3 mm 增建層予以測量, 並歸一歪。在全假體內相等距離所測得的輸出。百分深度劑量及等劑量分佈曲線則以S c a n d i t r o n i x RFA- 30 0 水假體連接p型電子射東半導體偵j!!l] 器在水中測量而得。組射;曳j馬量的測量則於K oda k V-fil m 中間, 依裝療管之外形挖空, 將底片置於裝療管矢狀面﹒ 上下各置。5 cm bo l us 作增建﹒ 以測量真實矢狀面之輻射沒漏量。 益基: 水平式裝療管之繪出增加約10 % ﹒直立式裝療管則降低約9 % 。有效射源至表面距離:水平式裝療管為1. 9 3 cm ﹒ 直立式則為1.7 4 cm 。直立式裝療管之等劑量分佈曲線中心軸有凹陷情形。水平式裝療管之輻射i曳漏量為最高劑量點之3 0 % ﹒ 位於裝療管的頂部, 而直立式之輻射洩漏量為最高劑量點之2 0 % ﹒ 位於裝療管的側部。 益益: Leipzig applica tors 由於體積小, 適合於一些小籠圍皮膚癌﹒ 口腔癒﹒ 及其他癒症之治療。由測量的結果發現: 百分深度劑量可用有效射源至表面距離予以準確估算至2 0 %劑量深度, 直立式與水平式裝療管的輸出變化達1 0 % ﹒投予劑量時應特別注意。輯射;曳;扇量的測量提供使用者了解裝療管的防議能力及熱點所在位置﹒以供臨床應用時之參考。
Purp ose: Leipzi g applicators are one kind of accessorie s of Nucletron 1921r High-Dose-Rat e remote after loadin g system . According to the orientation of the source axis in the applicator. it can be divided into two kinds: hori zo ntal and vertical ones . There are three kinds of diamet er for each type of appli cator : I. 2 and 3 cm. Five character istics of the applicator will be measured for clinical application. They are geo metric structure. relati ve output . percent depth dose. isodose curve distributions and rea l sagittal plane radiation leakage test. Materials and Methods : High acc uracy calipers was used to measure the geo metr ic structure of the applicator. The rela tive outputs were meas ured with N.E. 0.03 c.c. para llel-plate ionization chamber connected to lonex Dosemaster 2590 in RMI so lid phantom with 3 mm build-up layer. The outputs were normalized to the dose in full phantom that was measu red at the same source- to-chamber distance. The percentage depth dose and isodose curve distributions were measured with Sca nditronix RFA-300 water phantom co nnected to p-type e lectron beam semiconductor chamber. The measurement was perform ed in water along the side Mylar windo w. The real sagi tta l plane radiation leakage of the app lica tor was measu red with Kodak V-fi lm that was cut acc ording to the shape of the applicator. Result s: The relat ive outputs of the horizont al type were increase d 10%. while the vertical ones were decreased 9%. The effec tive so urce- to-s urface distance of the horizont al type is equal to 1.93 cm and 1.74 cm for the vertical ones. The isodose curves are attenuated in the central axis of vertica l type appl icators due to the attenuation from cath eter and so urce tip. The hot spots of the hori zontal type appli cator s are located at the top of the applicator and at the sides for the vertical ones. The leaka ge is 30% for the horizontal types and 20% for the vertica l types. Conclusion : Leipzig applicators can be used to treat some small volume ca nce r such as skin cancer. ora l cancer and for other dose boost treatment. The dose can be es timated with ESSD to app roximat ely 20% depth accu rately. The hot spots of the appli cators allow the user to avo id unnecessary ex pos ure.


    

本卷期目次
放射治療與腫瘤學
硫酸亞鐵膠體劑量計在放射治療應用之原理與探討/ 羅濟慶李俊信
婦女腹股淋巴結之放射治療技術/ 張東杰陳麗惠李紳豪湯國政
病毒檢驗在腫瘤診斷與治療上的應用/ 周寬基張錦霞周絢蘭曾文瑟陳光耀
Endocrine Dysfunction in Patients with Nasopharyngeal Carcinoma after Radiotherapy -A Prospective Study with 10 Years Follow-Up/ Chun-Chieh WangJoseph T. ChangJen-Der LinSimon G. TangJi-Hong Hong
晚期鼻咽癌同步化學放射治療之研究-臺中榮總之經驗/ 林進清詹建勝曾顯群翁益強高忠恕王麗鈴
鼻咽癌與治療前EB病毒VCA抗體指數的關係/ 陳建勳林立青胡渝昌劉文山張慶雄
Radiation Therapy in Extranodal Non-Hodgkin's Lymphoma of the Head and NeckRadiation Therapy in Extranodal Non-Hodgkin's Lymphoma of the Head and Neck/ Chung-Shuh KaoJian-Sheng JanChing-ilsiung ChangJin-Ching LinHsien-Chun TsengYih-Chyang Weng
組織挿植式微波天線陣列熱療系統之假體研究/ 熊佩韋許文林蘇振隆紀瑞峻施榕平
Leipzig Applicators之劑量特性/ 黃英明郭珍妮陳海雯王裕文
Treatment Results of Malignant Lymphoma of Nasopharynx at National Taiwan University Hospital/ Louis Tak LuiWei-Chung HsuNa-Na ChungPo-Ming WangLai-Lei TingRuey-Long Hong
鼻咽癌與治療前EB病毒VCA抗體指數的關係/ 陳建勳林立青胡渝昌劉文山張慶雄
Postoperative Radiotherapy for Malignant Parotid Gland Tumors/ 王麗鈴詹建勝林進清曾顯群翁忠恕高忠恕
Postoperative Radiotherapy for Malignant Parotid Gland Tumors/ Li-Ly WangJian-Sheng JanJih-Ching LinHsien-Chun TsengYih-Chyang WengChung-Shuh Kao
Endocrine Dysfunction in Patients with Nasopharyngeal Carcinoma after Radiotherapy-A Prospective Study with 10 Years Follow-Up/ Chun-Chieh WangJoseph T. ChangJen-Der LinSimon G. TangJi-Hong Hong
婦女腹股淋巴結之放射治療技術/ 張東杰陳麗惠李紳豪湯國政
Leipzig Applicators之劑量特性/ 黃英明郭珍妮陳海雯王裕文
硫酸亞鐵膠體劑量計在放射治療應用之原理與探討/ 羅濟慶李俊信
組織插植式微波天線陣列熱療系統之假體研究/ 熊佩韋許文林蘇振隆紀瑞峻施榕平
病毒檢驗在腫瘤診斷與治療上的應用/ 周寬基張錦霞周絢蘭曾文瑟陳光耀
Radiation Therapy in Extranodal Non-Hodgkin's Lymphoma of the Head and Neck/ Chung-Shuh KaoJian-Sheng JanChing-Hsiung ChangJin-Ching LinHsien-Chun TsengYih-Chyang Weng
Treatment Results of Malignant Lymphoma of Nasopharynx at National Taiwan University Hospital/ Louis Tak LuiWei-Chung HsuNa-Na ChungPo-Ming WangLai-Lei TingRuey-Long Hong
晚期鼻咽癌同步化學放射治療之研究--臺中榮總之經驗/ 林進清唐建勝曾顯群翁益強高忠恕王麗鈴
 
   
 
   

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