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
6期
521-524
,共4页
曹午飞%陈立新%陈利%邓小武
曹午飛%陳立新%陳利%鄧小武
조오비%진립신%진리%산소무
调强放射疗法%剂量学%γ通过率
調彊放射療法%劑量學%γ通過率
조강방사요법%제량학%γ통과솔
Intensity-modulated radiotherapy%Dosimetry%γ pass rate
目的 探讨使用独立验算软件IMsure进行调强放疗质量保证的准确性和可行性.方法 以直线加速器瓦里安600C/D为例,选取25例Eclipse治疗计划系统(TPS)计算的调强放疗(IMRT)计划,采用IMsure进行剂量计算验证,同时用Matrixx平面探测矩阵进行实际测量.对TPS、IMsure计算结果和Matrixx测量结果进行相互比较.结果 选取中心探头点作为参考点,IMsure计算结果和Matrixx测量结果与TPS计算结果偏差分别为(-0.11 ±1.24)％(t=0.20,P=0.840)和(-0.18 +1.45)％(t=0.86,P=0.400).3mm/3％和2mm/2％标准下IMsure对TPS计算结果的验证γ通过率分别为(98.7±2.8)％和(94.9±7.2)％,Matrixx对TPS计算结果的验证γ通过率分别为(99.0±2.0)％和(93.2±6.9)％,3 mm/3％标准下IMsure与Matrixx对TPS计算结果的验证γ通过率没有统计学差异(t =1.54,P=0.126).结论 IMsure可较好用于TPS初期的验收和临床测试.在常规临床放疗中通过IMsure对IMRT计划进行“预验证”,在充分常规放疗质量保证措施下可部分代替IMRT的实际测量验证,从而减轻日常的测量工作.
目的 探討使用獨立驗算軟件IMsure進行調彊放療質量保證的準確性和可行性.方法 以直線加速器瓦裏安600C/D為例,選取25例Eclipse治療計劃繫統(TPS)計算的調彊放療(IMRT)計劃,採用IMsure進行劑量計算驗證,同時用Matrixx平麵探測矩陣進行實際測量.對TPS、IMsure計算結果和Matrixx測量結果進行相互比較.結果 選取中心探頭點作為參攷點,IMsure計算結果和Matrixx測量結果與TPS計算結果偏差分彆為(-0.11 ±1.24)％(t=0.20,P=0.840)和(-0.18 +1.45)％(t=0.86,P=0.400).3mm/3％和2mm/2％標準下IMsure對TPS計算結果的驗證γ通過率分彆為(98.7±2.8)％和(94.9±7.2)％,Matrixx對TPS計算結果的驗證γ通過率分彆為(99.0±2.0)％和(93.2±6.9)％,3 mm/3％標準下IMsure與Matrixx對TPS計算結果的驗證γ通過率沒有統計學差異(t =1.54,P=0.126).結論 IMsure可較好用于TPS初期的驗收和臨床測試.在常規臨床放療中通過IMsure對IMRT計劃進行“預驗證”,在充分常規放療質量保證措施下可部分代替IMRT的實際測量驗證,從而減輕日常的測量工作.
목적 탐토사용독립험산연건IMsure진행조강방료질량보증적준학성화가행성.방법 이직선가속기와리안600C/D위례,선취25례Eclipse치료계화계통(TPS)계산적조강방료(IMRT)계화,채용IMsure진행제량계산험증,동시용Matrixx평면탐측구진진행실제측량.대TPS、IMsure계산결과화Matrixx측량결과진행상호비교.결과 선취중심탐두점작위삼고점,IMsure계산결과화Matrixx측량결과여TPS계산결과편차분별위(-0.11 ±1.24)％(t=0.20,P=0.840)화(-0.18 +1.45)％(t=0.86,P=0.400).3mm/3％화2mm/2％표준하IMsure대TPS계산결과적험증γ통과솔분별위(98.7±2.8)％화(94.9±7.2)％,Matrixx대TPS계산결과적험증γ통과솔분별위(99.0±2.0)％화(93.2±6.9)％,3 mm/3％표준하IMsure여Matrixx대TPS계산결과적험증γ통과솔몰유통계학차이(t =1.54,P=0.126).결론 IMsure가교호용우TPS초기적험수화림상측시.재상규림상방료중통과IMsure대IMRT계화진행“예험증”,재충분상규방료질량보증조시하가부분대체IMRT적실제측량험증,종이감경일상적측량공작.
Objective To investigate of the accuracy and feasibility of independent check for intensity-modulated radiotherapy (IMRT).Methods Inputing the linear accelerator Varian 600C/D physical data to IMsure ( a independent checking software) and constructing a calculation model.Use of IMsure to calculate the point dose and fluence of 25 cases IMRT treatment plans which have been calculated by Eclipse treatment planning system (TPS),and do a actual measurement of these plans by Matrixx at the same time.IMsure,TPS calculation results and measurement results of Matrixx were compared.Results Select Matrixx's center probe as a reference point,to TPS calculated results as the standard,then the average difference of the IMsure calculation and Matrixx measurement were ( -0.13 + 1.24)％ (t =0.20,P =0.840 ) and ( - 0.18 ± 1.45 ) ％ ( t =0.86,P =0.400 ),respectively.Compared IMsure with 3 mm/3 ％and 2 mm/2％ standard respectively,the average γ rate of TPS were (98.7 ±2.8)％ and (94.9 ±7.2)％ ;compared matrixx measurement results,the average γ rate of TPS were ( 99.0 + 2.0 ) ％ and ( 93.2 ±6.9) ％.The results show that the difference of the point dose and the γ rate of dose distribution by Matrixx measurement and IMsure calculation was no statistically significant difference ( t =1.54,P =0.126 ).Conclusions Independent checking software can be used in the treatment planning system to acceptance and initial clinical tests.In routine,a independent checking software as IMsure may do a" pre-verificaton" of IMRT treatment plan,or even partially replace of the actual measurement if the adequate conventional quality assurance do well,thus reducing the daily measurements.
