中华放射肿瘤学杂志
中華放射腫瘤學雜誌
중화방사종류학잡지
Chinese Journal of Radiation Oncology
2015年
6期
695-698
,共4页
金建华%储开岳%商海焦%刘海涛%吴建亭%赵永亮%曹顾飞
金建華%儲開嶽%商海焦%劉海濤%吳建亭%趙永亮%曹顧飛
금건화%저개악%상해초%류해도%오건정%조영량%조고비
容积调强弧形疗法%多目标优化%重叠体积直方图
容積調彊弧形療法%多目標優化%重疊體積直方圖
용적조강호형요법%다목표우화%중첩체적직방도
Volume modulated arc therapy%Multi criteria optimization%Overlapping dose volume histogram
目的:研究基于DVH目标函数设计VMAT计划的新方法,并应用到临床食管癌患者中评估所得计划的剂量学特性和计划效率。方法对12例胸段食管癌患者以常规VMAT计划方式为参照,分别采用基于多目标优化DVH ( MCO?DVH)目标函数和重叠体积预测DVH ( OVH?DVH)目标函数设计两组VMAT计划,评估所得VMAT计划的剂量学特性、计划效率。配对t检验组间差异。结果基于DVH目标函数的两组VMAT计划均满足临床要求,与常规VMAT计划相比,靶区适形指数和均匀指数较优(0.77∶0.72,P=0.017和0.10∶0.12,P=0.047);MCO?VMAT计划中OAR双肺V5和脊髓V50优于常规VMAT计划组(54.66∶60.23,P=0.013和0.98∶0.49,P=0.037),其他参数相近;与常规 VMAT 计划时间相比,基于 DVH 目标函数的 VMAT 计划设计时间明显缩短(8.2∶19.5, P=0.023)。结论与常规VMAT计划设计方法相比,基于理想DVH目标函数设计VMAT计划可实现靶区剂量分布更均匀的同时,更好保护OAR且可提高计划效率。
目的:研究基于DVH目標函數設計VMAT計劃的新方法,併應用到臨床食管癌患者中評估所得計劃的劑量學特性和計劃效率。方法對12例胸段食管癌患者以常規VMAT計劃方式為參照,分彆採用基于多目標優化DVH ( MCO?DVH)目標函數和重疊體積預測DVH ( OVH?DVH)目標函數設計兩組VMAT計劃,評估所得VMAT計劃的劑量學特性、計劃效率。配對t檢驗組間差異。結果基于DVH目標函數的兩組VMAT計劃均滿足臨床要求,與常規VMAT計劃相比,靶區適形指數和均勻指數較優(0.77∶0.72,P=0.017和0.10∶0.12,P=0.047);MCO?VMAT計劃中OAR雙肺V5和脊髓V50優于常規VMAT計劃組(54.66∶60.23,P=0.013和0.98∶0.49,P=0.037),其他參數相近;與常規 VMAT 計劃時間相比,基于 DVH 目標函數的 VMAT 計劃設計時間明顯縮短(8.2∶19.5, P=0.023)。結論與常規VMAT計劃設計方法相比,基于理想DVH目標函數設計VMAT計劃可實現靶區劑量分佈更均勻的同時,更好保護OAR且可提高計劃效率。
목적:연구기우DVH목표함수설계VMAT계화적신방법,병응용도림상식관암환자중평고소득계화적제량학특성화계화효솔。방법대12례흉단식관암환자이상규VMAT계화방식위삼조,분별채용기우다목표우화DVH ( MCO?DVH)목표함수화중첩체적예측DVH ( OVH?DVH)목표함수설계량조VMAT계화,평고소득VMAT계화적제량학특성、계화효솔。배대t검험조간차이。결과기우DVH목표함수적량조VMAT계화균만족림상요구,여상규VMAT계화상비,파구괄형지수화균균지수교우(0.77∶0.72,P=0.017화0.10∶0.12,P=0.047);MCO?VMAT계화중OAR쌍폐V5화척수V50우우상규VMAT계화조(54.66∶60.23,P=0.013화0.98∶0.49,P=0.037),기타삼수상근;여상규 VMAT 계화시간상비,기우 DVH 목표함수적 VMAT 계화설계시간명현축단(8.2∶19.5, P=0.023)。결론여상규VMAT계화설계방법상비,기우이상DVH목표함수설계VMAT계화가실현파구제량분포경균균적동시,경호보호OAR차가제고계화효솔。
Objective To study the novel methods of VMAT planning based dose volume histogram ( DVH) optimization, evaluated the dosimetry and planning efficiency in VMAT planning for Esophageal Carcinoma. Methods Twelve Esophageal carcinoma patients were enrolled in this study. The conventional VMAT planning as the reference, using multi?criterion optimization DVH ( MCO?DVH ) and overlapping volume histogram prediction DVH ( OVH?DVH ) two different methods to get ideal objectives function for informing VMAT plans, Then evaluate the dosimetric, planning efficiency for all new VMAT plans. The difference between the paired t?test groups. Results The two VMAT plans based DVH objective function can meet the clinical needs. Compared with the conventional VMAT plan, Conformity index ( CI ) and Homogeneity index ( 0. 77 vs. 0. 72, P=0. 017 and 0. 10 vs. 0. 12, P=0. 047 ) is better in DVH informed plans;lung V5 and spinal cord V50 are better in MCO?DVH informed plan (54. 66 vs.60. 23,P=0. 013 and 0. 98 vs.0. 49,P=0. 037).Furthermore,the DVH informed plans had higher planning efficiency (8. 2 vs. 19. 5,P=0. 023) . Conclusions DVH Objective informed VMAT Planning can achieve clinical needs with much uniform dose to target,lower OAR dose and higher planning efficiency.