中国肿瘤临床
中國腫瘤臨床
중국종류림상
CHINESE JOURNAL OF CLINICAL ONCOLOGY
2013年
3期
140-143
,共4页
庄名赞%张拓丹%彭逊%陈志坚%林志雄%李德锐
莊名讚%張拓丹%彭遜%陳誌堅%林誌雄%李德銳
장명찬%장탁단%팽손%진지견%림지웅%리덕예
鼻咽癌%RapidArc%固定野调强放射治疗%旋转调强放射治疗
鼻嚥癌%RapidArc%固定野調彊放射治療%鏇轉調彊放射治療
비인암%RapidArc%고정야조강방사치료%선전조강방사치료
nasopharyngeal carcinoma%RapidArc%fixed field intensity-modulated radiation therapy%volumetric modulated arc therapy
目的:近年RapidArc的临床应用已引起越来越多的关注,本研究比较RapidArc与固定野调强放射治疗(IMRT)两种放疗技术在晚期鼻咽癌治疗计划中的差异.方法:随机选取10例晚期鼻咽癌患者,采用RapidArc与IMRT两种技术进行计划设计与剂量验证,比较计划的靶区剂量、危及器官与正常组织剂量、机器跳数、治疗时间与剂量验证结果.结果:两种计划的剂量分布基本一致,均能提供足够的靶区剂量.RapidArc的PTVnx最小剂量,PTVnd、PTV60、喉、腮腺的平均剂量低于IMRT,PTV60的HI值高于 IMRT,机器跳数比 IMRT 减少约58%,治疗时间减少约70%.以3%/3mm 为界,RapidArc 验证的γ指数通过率为(98.75±0.50)%,IMRT的通过率为(98.86±0.67)%.结论:两种放疗技术均能够满足临床治疗需要,剂量验证结果能够较好的符合计划计算结果.RapidArc比IMRT有着更多的优势,不仅可以减少机器跳数,缩短治疗时间,而且可以减少喉、腮腺的受照剂量.
目的:近年RapidArc的臨床應用已引起越來越多的關註,本研究比較RapidArc與固定野調彊放射治療(IMRT)兩種放療技術在晚期鼻嚥癌治療計劃中的差異.方法:隨機選取10例晚期鼻嚥癌患者,採用RapidArc與IMRT兩種技術進行計劃設計與劑量驗證,比較計劃的靶區劑量、危及器官與正常組織劑量、機器跳數、治療時間與劑量驗證結果.結果:兩種計劃的劑量分佈基本一緻,均能提供足夠的靶區劑量.RapidArc的PTVnx最小劑量,PTVnd、PTV60、喉、腮腺的平均劑量低于IMRT,PTV60的HI值高于 IMRT,機器跳數比 IMRT 減少約58%,治療時間減少約70%.以3%/3mm 為界,RapidArc 驗證的γ指數通過率為(98.75±0.50)%,IMRT的通過率為(98.86±0.67)%.結論:兩種放療技術均能夠滿足臨床治療需要,劑量驗證結果能夠較好的符閤計劃計算結果.RapidArc比IMRT有著更多的優勢,不僅可以減少機器跳數,縮短治療時間,而且可以減少喉、腮腺的受照劑量.
목적:근년RapidArc적림상응용이인기월래월다적관주,본연구비교RapidArc여고정야조강방사치료(IMRT)량충방료기술재만기비인암치료계화중적차이.방법:수궤선취10례만기비인암환자,채용RapidArc여IMRT량충기술진행계화설계여제량험증,비교계화적파구제량、위급기관여정상조직제량、궤기도수、치료시간여제량험증결과.결과:량충계화적제량분포기본일치,균능제공족구적파구제량.RapidArc적PTVnx최소제량,PTVnd、PTV60、후、시선적평균제량저우IMRT,PTV60적HI치고우 IMRT,궤기도수비 IMRT 감소약58%,치료시간감소약70%.이3%/3mm 위계,RapidArc 험증적γ지수통과솔위(98.75±0.50)%,IMRT적통과솔위(98.86±0.67)%.결론:량충방료기술균능구만족림상치료수요,제량험증결과능구교호적부합계화계산결과.RapidArc비IMRT유착경다적우세,불부가이감소궤기도수,축단치료시간,이차가이감소후、시선적수조제량.
Objective: This study compares volumetric-modulated arc therapy (RapidArc) and fixed field intensity-modulated radiation therapy (IMRT) for advanced nasopharyngeal carcinoma. Methods: Ten advanced nasopharyngeal carcinoma patients were randomly selected for this study. Two treatment plans were completed for each patient, i.e., the RapidArc and IMRT schemes. Dosimetric verification was conducted for each scheme. The doses for the planning target volumes (PTVs), organs at risk (OARs), and normal tissues were compared. The technical delivery parameters, including monitor units (MUs), time of therapy, and results of dosimetric verification, were analyzed. Results: No significant differences were found in dose distribution between the two schemes. Both techniques delivered adequate doses for the PTVs. For RapidArc planning, the minimal dose of PTVnx, mean dose of PTVnd, PTV60, larynx, and parotid were lower compared with those of IMRT schemes, whereas the homogeneity index of PTV60 was higher. Compared with IMRT plans, the MUs and treatment time in RapidArc plans were reduced by approximately 58% and 70%, respectively. Gamma analysis produced an average pass rate of 98.75%± 0.50% and 98.86%±0.67% at the 3%/3 mm levels for RapidArc and IMRT, respectively. Conclusion: Both RapidArc and IMRT plans satisfied the requirements for advanced nasopharyngeal carcinoma therapy. The dose measurements showed good agreement with the computed doses. The RapidArc technique has much more superiority compared with the IMRT technique. The former decreases not only the MUs and treatment time, but also the dose to the larynx and parotid glands.