中山大学学报（自然科学版）
中山大學學報（自然科學版）
중산대학학보（자연과학판）
ACTA SCIENTIARUM NATURALIUM UNIVERSITATIS SUNYATSENI
2010年
2期
13-16
,共4页
蒙特卡罗%质子治疗%束流扩展%束流横向分布
矇特卡囉%質子治療%束流擴展%束流橫嚮分佈
몽특잡라%질자치료%속류확전%속류횡향분포
Monte Carlo%proton therapy%beam spreading%lateral beam distribution
束流扩展是研究大体积深度肿瘤的基础,利用Monte Carlo多粒子模拟软件Fluka,计算质子经过双环双散射体后束流分布特性,在束流扩展半径相同的条件下,与解析计算相比较.结果表明:Fluka计算得到的第一散射体的厚度小于解析计算得到的结果,散射膜薄的条件下二者符合好于散射膜厚的条件.束流扩展半径随着两个散射体厚度的增加而增大,束流利用率先增加后减小,最大值是27%.
束流擴展是研究大體積深度腫瘤的基礎,利用Monte Carlo多粒子模擬軟件Fluka,計算質子經過雙環雙散射體後束流分佈特性,在束流擴展半徑相同的條件下,與解析計算相比較.結果錶明:Fluka計算得到的第一散射體的厚度小于解析計算得到的結果,散射膜薄的條件下二者符閤好于散射膜厚的條件.束流擴展半徑隨著兩箇散射體厚度的增加而增大,束流利用率先增加後減小,最大值是27%.
속류확전시연구대체적심도종류적기출,이용Monte Carlo다입자모의연건Fluka,계산질자경과쌍배쌍산사체후속류분포특성,재속류확전반경상동적조건하,여해석계산상비교.결과표명:Fluka계산득도적제일산사체적후도소우해석계산득도적결과,산사막박적조건하이자부합호우산사막후적조건.속류확전반경수착량개산사체후도적증가이증대,속류이용솔선증가후감소,최대치시27%.
Beam spreading is the foundation of proton therapy with large area and depth tumour.The characteristics of proton lateral beam distribution for dual-ring double scattering system are investigated using Monte Carlo multi-particle transport code Fluka and the results are compared with analytical computation,when the same radius of beam spreading is considered.It is found that the first scatterer is thinner than the results obtained from analytical computation and they are coincided better with thin-foil than thick-foil.For dual-ring double scattering system,as the thickness of foils increase,the radius of beam spreading increase,but the efficiency of beam use increase firstly and then decrease,the maximum value is about 27%.
