现代肿瘤医学
現代腫瘤醫學
현대종류의학
Journal of Modern Oncology
2015年
19期
2755-2757
,共3页
陈婷婷%陈丽%花威%张西志%汪步海%张先稳
陳婷婷%陳麗%花威%張西誌%汪步海%張先穩
진정정%진려%화위%장서지%왕보해%장선은
旋转容积调强%剂量验证%上段食管癌
鏇轉容積調彊%劑量驗證%上段食管癌
선전용적조강%제량험증%상단식관암
RapidArc%dose verification%upper esophageal cancer
目的:分析旋转容积调强计划在上段食管癌放射治疗中的适应性。方法:应用0.6cm3指形电离室和 COMPASS 三维剂量验证系统分别对10例上段食管癌旋转容积调强计划进行绝对剂量和相对剂量的验证。应用剂量体积直方图比较靶区、肺和脊髓照射剂量和体积的差异。锥形束 CT 验证放疗后摆位误差,每周一次,共做三次。结果:等中心处绝对剂量精确率均达98%以上。GTV、PTV - CTV、脊髓和双肺γ通过率均达97%以上,GTV、CTV - GTV、PTV - CTV D95%、Dmean 的差异多数处于2%~3%之间,脊髓 D1%差异为2.28%。左肺和右肺 V10-30、Dmean的差异在2%以内。前后、头脚、左右方向的位置误差均值在2%以内。结论:旋转容积调强技术在上段食管癌放疗中是适用的。
目的:分析鏇轉容積調彊計劃在上段食管癌放射治療中的適應性。方法:應用0.6cm3指形電離室和 COMPASS 三維劑量驗證繫統分彆對10例上段食管癌鏇轉容積調彊計劃進行絕對劑量和相對劑量的驗證。應用劑量體積直方圖比較靶區、肺和脊髓照射劑量和體積的差異。錐形束 CT 驗證放療後襬位誤差,每週一次,共做三次。結果:等中心處絕對劑量精確率均達98%以上。GTV、PTV - CTV、脊髓和雙肺γ通過率均達97%以上,GTV、CTV - GTV、PTV - CTV D95%、Dmean 的差異多數處于2%~3%之間,脊髓 D1%差異為2.28%。左肺和右肺 V10-30、Dmean的差異在2%以內。前後、頭腳、左右方嚮的位置誤差均值在2%以內。結論:鏇轉容積調彊技術在上段食管癌放療中是適用的。
목적:분석선전용적조강계화재상단식관암방사치료중적괄응성。방법:응용0.6cm3지형전리실화 COMPASS 삼유제량험증계통분별대10례상단식관암선전용적조강계화진행절대제량화상대제량적험증。응용제량체적직방도비교파구、폐화척수조사제량화체적적차이。추형속 CT 험증방료후파위오차,매주일차,공주삼차。결과:등중심처절대제량정학솔균체98%이상。GTV、PTV - CTV、척수화쌍폐γ통과솔균체97%이상,GTV、CTV - GTV、PTV - CTV D95%、Dmean 적차이다수처우2%~3%지간,척수 D1%차이위2.28%。좌폐화우폐 V10-30、Dmean적차이재2%이내。전후、두각、좌우방향적위치오차균치재2%이내。결론:선전용적조강기술재상단식관암방료중시괄용적。
Objective:To study the application suitability of RapidArc for upper esophageal cancer. Methods:To use 0. 6 cm3 finger ionization chamber and COMPASS three - dimensional dose verification system,10 cases of upper esophageal cancers on the RapidArc plans for absolute dose and relative dose was verified. The differences of irradia-tion dose and volume in target,lungs and spinal cord were evaluated with dose - volume histograms. To verify the posi-tion error by cone beam CT ended after radiotherapy,once a week,total of three times. Results:The center absolute dose of upper esophageal cancer accurate rates were above 98% . GTV,PTV - CTV,spinal cord and double lung γpass rate reached to 97% . The difference of D95% and Dmean ,in the majority of between two percent and three percent, which of GTV,CTV - GTV,PTV - CTV. Spinal cord D1% difference of 2. 28% . The left and right lung V10 ~ 30 and Dmean variation were within 2% . The mean position error of pre - post,head - foot,left - right direction was within 2% . Conclusion:RapidArc is applicable in the up esophageal cancer radiotherapy.