自主呼吸控制技术在左侧乳腺癌放疗中对心脏及其亚结构的保护研究OACSTPCD
Study on the protection of ABC technique for heart and its substructures in radiotherapy for left breast cancer
目的:探讨自主呼吸控制(ABC)技术在左侧乳腺癌放疗中对心脏及其亚结构的保护.方法:回顾性选取2020年8月至2022年5月深圳市人民医院收治的50例左侧乳腺癌放疗患者,分别在其ABC深吸气屏气(ABC-DIBH)CT和自由呼吸(FB)CT影像上行调强放疗计划设计,比较两种状态下心脏以及心脏亚结构左心室(LV)、左心房(LA)、右心室(RV)、右心房(RA)、左主干(LMCA)、左前降支(LAD)、左回旋支(LCX)、右冠状动脉(RCA)等危及器官(OARs)的剂量参数.结果:对比FB,ABC-DIBH状态下心脏的2%体积剂量(D2)、平均剂量(Dmean)、剂量覆盖的百分比体积(V30、V20、V10、V5)分别降低32.91%[绝对降低(1 279.11 cGy)]、36.12%(195.94 cGy)、58.95%(2.8%)、54.32%(3.58%)、50.14%(5.56%)、46.22%(9.67%),差异均具有统计学意义(t=10.28、12.81、9.16、10.28、12.82、12.24,P＜0.01).心脏亚结构LV、LA、RV、RA、LMCA、LAD、LCX、RCA的Dmean分别降低37.64%(285.92 cGy)、15.38%(23.68 cGy)、34.12%(118.93 cGy)、9.72%(12.52 cGy)、22.17%(47.99 cGy)、31.81%(820.63 cGy)、16.51%(34.72 cGy)、14.86%(34.11 cGy),差异均具有统计学意义(t=9.50、3.71、6.20、8.65、3.18、10.92、4.26、6.71,P＜0.01).结论:ABC技术通过深吸气屏气扩大心脏与靶区之间的距离,极大程度降低了心脏及其亚结构所受剂量,可对心脏及其亚结构形成有效保护,能够消除呼吸运动造成的乳腺癌靶区位置的动态变化,避免靶区漏照、正常组织多照、剂量偏差等问题.
Objective:To investigate the protection of Active Breathing Coordinator(ABC)technique for heart and its substructures in radiotherapy for left breast cancer.Methods:A total of 50 patients with left breast cancer who underwent radiotherapy in our department were retrospectively selected,and treatment plans with intensity modulated radiotherapy(IMRT)were designed on the images of ABC combined with deep inspiration breath hold(ABC-DIBH)computed tomography(CT)and free-breathing(FB)CT,respectively.The dose parameters of the organ at risks(OARs)of heart and its substructures,including left ventricle(LV),left atrium(LA),right ventricle(RV),right atrium(RA),left main coronary artery(LMCA),left anterior descending coronary artery(LAD),left circumflex coronary artery(LCX)and right coronary artery(RCA),were compared between the two conditions.Results:Compared with FB,the dose of 2%volume(D2),the mean dose(Dmean),the percent volumes covered by different doses(V30,V20,V10,V5)decreased respectively 32.91%(absolute reduction of 1279.11 cGy),36.12%(195.94cGy),58.95%(2.8%),54.32%(3.58%),50.14%(5.56%)and 46.22%(9.67%)of heart under ABC-DIBH condition,and the differences were significant(t=10.28,12.81,9.16,10.28,12.82,12.24,P＜0.01),respectively.In addition,the Dmean values of LV,LA,RV,RA,LMCA,LAD,LCX and RCA decreased by 37.64%(absolute reduction was 285.92 cGy),15.38%(23.68 cGy),34.12%(118.93cGy),9.72%(12.52 cGy),22.17%(47.99 cGy),31.81%(820.63 cGy),16.51%(34.72 cGy)and 14.86%(34.11cGy)under ABC-DIBH condition,respectively,the differences were significant(t=9.50,3.71,6.20,8.65,3.18,10.92,4.26,6.71,P＜0.05).Conclusion:ABC technique can greatly reduce the received doses of heart and its substructures by extending the distance between the heart and the target region with DIBH,thus can form a very effective protection for the heart and its substructures.In addition,it can eliminate the dynamic variation of target location of breast cancer caused by respiratory,and avoid a series of problems,such as target missing,overexposure on normal tissue,and dose deviation.
陈洪涛;陈伟思;朴莹;郑芳;史亚滨;杨东;李子煌
深圳市人民医院(暨南大学第二临床医学院 南方科技大学第一附属医院)肿瘤放疗科 深圳 518020深圳市人民医院(暨南大学第二临床医学院 南方科技大学第一附属医院)肿瘤放疗科 深圳 518020||海南医学院第一附属医院放疗科 海口 570102
临床医学
呼吸运动管理自主呼吸控制系统左侧乳腺癌心脏亚结构调强放射治疗
Respiratory movement managementActive breathing coordinatorLeft breast cancerCardiac substructureIntensity modulated radiotherapy(IMRT)
《中国医学装备》 2024 (007)
23-28 / 6
海南省卫生计生行业科研项目(19A200096) Hainan provincial health family planning industry research projects(19A200096)
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