CAJ | 학술논문

目的探讨放射治疗射野片的拍摄及误差分析.方法采用双曝光技术的方法对放射治疗射野验证片拍摄,在曝光时以十字插板为参考坐标,并根据片中标记的人体部位计算中心移位误差,与CT模拟定位DRR图进行比较分析,测量摆位误差.结果25例患者经过拍摄后一共得到50张验证片.两种拍摄的射野片的图像都比较清晰的显示了目的区域的形状、大小及与人体解剖标记之间的定位.统计其误差数据没有统计学差异(在x、y、z方向上,P>0.05).结论采用双曝光技术的方法拍摄的射野片操作简便、成像较清晰、在临床上可以有效的减少摆位误差.
목적탐토방사치료사야편적박섭급오차분석.방법채용쌍폭광기술적방법대방사치료사야험증편박섭,재폭광시이십자삽판위삼고좌표,병근거편중표기적인체부위계산중심이위오차,여CT모의정위DRR도진행비교분석,측량파위오차.결과25례환자경과박섭후일공득도50장험증편.량충박섭적사야편적도상도비교청석적현시료목적구역적형상、대소급여인체해부표기지간적정위.통계기오차수거몰유통계학차이(재x、y、z방향상,P>0.05).결론채용쌍폭광기술적방법박섭적사야편조작간편、성상교청석、재림상상가이유효적감소파위오차.
@@@@Objective To evaluate the value of megavolt computed radiography techniques for portal field verification in radiation oncology department. Methods Double-exposure technique was used to take the portal images. The reference mark points were added to the field at the first exposure and the cross lines drawn based on the images were defined as the reference coordinate to the actual field. Results 50 images of 25 patients were taken before radiotherapy. The CR images and simulator images can display the field shape, size, treatment center and anatomy structure clearly. All different structures and positions could be identified in order to assess if the actual field coincided with the radiation planning. Two groups of the result is negative (P>0.05 in x, y and z axis). Conclusion It was satisfactory using CR technique for the radiotherapies patient's portal field image. The technique for patient position verification was effective.