中华放射肿瘤学杂志
中華放射腫瘤學雜誌
중화방사종류학잡지
CHINESE JOURNAL OF RADIATION ONCOLOGY
2011年
5期
432-434
,共3页
倪昕晔%汤晓斌%张志明%顾卫东%耿长冉%林涛%宋浩磊%刘茜%孙苏平%陈达
倪昕曄%湯曉斌%張誌明%顧衛東%耿長冉%林濤%宋浩磊%劉茜%孫囌平%陳達
예흔엽%탕효빈%장지명%고위동%경장염%림도%송호뢰%류천%손소평%진체
蒙特卡罗%放射剂量%金属植入物
矇特卡囉%放射劑量%金屬植入物
몽특잡라%방사제량%금속식입물
Monte Carlo%Radiation dose%Metal implants
目的 用蒙特卡罗(MC)模拟实验体内植入金属物后的百分深度剂量变化。方法 用6MVX线照射水下 5 cm处0.4 cm厚金属植入物,对有无金属植入物百分深度剂量变化进行MC方法模拟实验并比较结果。结果 6MVX线照射置入不锈钢板、钛合金板比不用植入物时入射面剂量分别增加19.6％、15.7％,不锈钢板、钛合金板入射面0.3 cm以外影响＜1.5％。不锈钢板、钛合金板出射面剂量分别减少8.6％、8.2％,剂量影响＜1.5％时距离出射面1.2、0.9 cm。不锈钢板比钛合金板入射面剂量大3.9％,出射面剂量相似。结论 MC方法是一种能快捷、准确的计算方式,金属植入物对放疗剂量影响明显,相同条件下不锈钢对入射面剂量影响大于钛合金钢板。
目的 用矇特卡囉(MC)模擬實驗體內植入金屬物後的百分深度劑量變化。方法 用6MVX線照射水下 5 cm處0.4 cm厚金屬植入物,對有無金屬植入物百分深度劑量變化進行MC方法模擬實驗併比較結果。結果 6MVX線照射置入不鏽鋼闆、鈦閤金闆比不用植入物時入射麵劑量分彆增加19.6％、15.7％,不鏽鋼闆、鈦閤金闆入射麵0.3 cm以外影響＜1.5％。不鏽鋼闆、鈦閤金闆齣射麵劑量分彆減少8.6％、8.2％,劑量影響＜1.5％時距離齣射麵1.2、0.9 cm。不鏽鋼闆比鈦閤金闆入射麵劑量大3.9％,齣射麵劑量相似。結論 MC方法是一種能快捷、準確的計算方式,金屬植入物對放療劑量影響明顯,相同條件下不鏽鋼對入射麵劑量影響大于鈦閤金鋼闆。
목적 용몽특잡라(MC)모의실험체내식입금속물후적백분심도제량변화。방법 용6MVX선조사수하 5 cm처0.4 cm후금속식입물,대유무금속식입물백분심도제량변화진행MC방법모의실험병비교결과。결과 6MVX선조사치입불수강판、태합금판비불용식입물시입사면제량분별증가19.6％、15.7％,불수강판、태합금판입사면0.3 cm이외영향＜1.5％。불수강판、태합금판출사면제량분별감소8.6％、8.2％,제량영향＜1.5％시거리출사면1.2、0.9 cm。불수강판비태합금판입사면제량대3.9％,출사면제량상사。결론 MC방법시일충능쾌첩、준학적계산방식,금속식입물대방료제량영향명현,상동조건하불수강대입사면제량영향대우태합금강판。
Objective To investigate the impact of metal plate on radiation dose distribution by Monte Carlo (MC) code. Methods The metal plates with 0. 4 thick were placed in water at 5 cm, all the plate irradiated with 6 MV X-ray were simulated by MC code, SSD =100 cm. The percentage depth dose with or without metal implants were compared. Results The surface absorbed doses on incident plane of stainless steel plate and titanium plate were increased by 19. 6％ and 15.7％ respectively as compared water,the dose influence was less than 1.5％ more than 0. 3 cm outside the incidence plane. The doses on the exit surface of stainless steel plate and titanium plate were lowered by 8. 6％ and 8. 2％ when compared with water, the dose impacts of this places where were from the exit surface of stainless steel plate 、titanium plate more than 1.2 cm,0. 9 cm were less than 1.5％. The surface absorbed doses on incident plane of stainless steel plate were increased by 3.9％ respectively as titanium plate, the dose of the exit surface of stainless steel plate and titanium plate was similar. Conclusions MC method is a fast and accurate calculation method. The influence of metal plate on the radiotherapy dose distribution is significant. Under the such condition, the impact of stainless steel plate is much more than that of titanium alloy plate.
