重庆医学2016，Vol.45Issue(11)：1453-1455,3.DOI:10.3969/j.issn.1671-8348.2016.11.004
射野准直器跟随功能在胸上段食管癌容积旋转调强计划中的应用
Application of Jaw-tracking function in VMAT for upper thoracic esophageal cancer
摘要
Abstract
Objective To explore the effect of the Jaw‐tracking with RapidArc(JT‐RapidArc) plans for upper thoracic e‐sophageal cancer .Methods Treatment planning was designed by using RapidArc and JT‐RapidArc techniques for 11 consecutive patients .The dose‐volume histogram parameters of PTV and the organs at risk ,conformity index(CI) ,heterogeneity index(HI) , low dose volume of normal tissue (B‐P ) and monitor units (MU ) were compared between the different techniques . Results Compared with the RapidArc plan ,JT‐RapidArc had increased coverage of PTV1(64) D98 and HI(P<0 .05) ,lower Dmean , D2 of PTV1(64) and PTV2(54) ,but no statistically difference in CI(P>0 .05) .Plans with JT‐RapidArc had lower Lung(V5 ,V10 , V13 ,V20 ,V30 ,Dmean ,P<0 .05) ,heart(V20 ,Dmean ,P<0 .05) ,and B‐P(V5 ,V10 ,V15 ,V20 ,V30 ,P<0 .05) ,but no significantly different in spinal cord and SC‐PRV as compared with RapidArc plans(P>0 .05) .JT‐RapidArc plans increaseed the MU by 1% (349 ± 29 vs .345 ± 16 ,P>0 .05) as compared with RapidArc plans .Conclusion All of the plans had met the requirements of clinical dosime‐try .JT‐RapidArc plans as compared with RapidArc plans ,showing better part of target coverage ,part of lung and heart and B‐P sparing ,which MU was slightly increased .关键词
食管肿瘤/准直器跟随/容积旋转调强/剂量学Key words
esophageal neoplasms/Jaw-tracking/RapidArc/dosiology分类
医药卫生引用本文复制引用
吴丽丽,陆佳扬,马长春,张武哲..射野准直器跟随功能在胸上段食管癌容积旋转调强计划中的应用[J].重庆医学,2016,45(11):1453-1455,3.基金项目
广东省医学科研基金立项课题资助项目（A2014455）。 （）
