CAJ | 학술논문

目的：对大孔径CT和MV-CBCT图像引导的放射治疗流程的介绍以及利用两种方法获得的摆位误差进行分析，比较两种图像引导方式在放疗摆位应用中的不同之处。方法：15例患者（鼻咽癌5例，前列腺癌4例，宫颈癌6例）治疗前分别进行CT和MV-CBCT图像采集，并与计划CT进行图像融合，MV-CBCT采用自动配准方式，CT采用自动＋手动配准方式，分析两组数据，探讨CTVision和MV-CBCT两种IGRT的应用。结果：CTVision和MV-CBCT对15例病人图像引导的方式在X、Y、Z方向的摆位误差均没有统计学意义，但Y方向的误差有一定差异。结论：CTVision图像更为清晰，采集时需要剂量更少，但所需时间较长，技术员需进出机房两次。
목적：대대공경CT화MV-CBCT도상인도적방사치료류정적개소이급이용량충방법획득적파위오차진행분석，비교량충도상인도방식재방료파위응용중적불동지처。방법：15례환자（비인암5례，전렬선암4례，궁경암6례）치료전분별진행CT화MV-CBCT도상채집，병여계화CT진행도상융합，MV-CBCT채용자동배준방식，CT채용자동＋수동배준방식，분석량조수거，탐토CTVision화MV-CBCT량충IGRT적응용。결과：CTVision화MV-CBCT대15례병인도상인도적방식재X、Y、Z방향적파위오차균몰유통계학의의，단Y방향적오차유일정차이。결론：CTVision도상경위청석，채집시수요제량경소，단소수시간교장，기술원수진출궤방량차。
Objective:Introducing the image -guided radiation therapy process of large aperture CT and MV -CBCT and analyzing obtained deviations,to discuss the differences between the two methods of positioning applica-tion.Methods:Fifteen patients(5 nasopharyngeal carcinoma,4 prostate cancer and 6 cervical cancer)were performed CT and MV-CBCT before radiation therapy.All images were compared with the planning CT by image fusion.The MV-CBCT used automatic registration method and the CT used automatic and/or manual method.To analyze two sets of data to discuss the positioning application of CTVision and MV-CBCT.Results:Both image-guided methods for the patients'positioning error had no statistical significance in X,Y,Z directions,but there were some differences in Y direction.Conclusion:Compared to MV-CBCT,the images of CT are clearer and dose requires fewer,but need more time and technicians must enter LINAC room twice.