CAJ | 학술논문

目的验证六点标记法与传统的三点标记法相比可否提高盆腔肿瘤的摆位精度.方法将60例盆腔肿瘤患者随机分为两组,三点标记组(30例)和六点标记组(30例).三点标记组采用传统的三点标记法进行摆位,六点标记组采用新型的六点标记法进行摆位.治疗前应用加速器分别拍摄两组的射野验证片,将其与计划系统生成的射野方向观视片进行比较,统计X(左右)、Y (头脚)、Z(腹背)三个方向上的摆位误差.结果六点标记组与三点标记组在Z方向上的摆位误差差异无统计学意义(P>0.05),说明六点标记法未能明显减少腹背方向上的摆位误差.六点标记组与三点标记组在X、Y方向上的摆位误差有统计学意义(均P<0.05),说明六点标记法能明显减少X、Y方向上的摆位误差.结论使用六点标记法能明显提高盆腔肿瘤患者的放疗摆位精度,且方法简便易行,具有临床推广价值.
목적 험증륙점표기법여전통적삼점표기법상비가부제고분강종류적파위정도.방법 장60례분강종류환자수궤분위량조,삼점표기조(30례)화륙점표기조(30례).삼점표기조채용전통적삼점표기법진행파위,륙점표기조채용신형적륙점표기법진행파위.치료전응용가속기분별박섭량조적사야험증편,장기여계화계통생성적사야방향관시편진행비교,통계X(좌우)、Y (두각)、Z(복배)삼개방향상적파위오차.결과 륙점표기조여삼점표기조재Z방향상적파위오차차이무통계학의의(P>0.05),설명륙점표기법미능명현감소복배방향상적파위오차.륙점표기조여삼점표기조재X、Y방향상적파위오차유통계학의의(균P<0.05),설명륙점표기법능명현감소X、Y방향상적파위오차.결론 사용륙점표기법능명현제고분강종류환자적방료파위정도,차방법간편역행,구유림상추엄개치.
Objective To verify the effectiveness of application of six-point marking in improvement of placement accuracy for pelvic cancers in contrast with traditional three-point marking methodology. Methods Altogether 60 pelvic cancer patients were randomly and evenly divided into two groups: Three-Point Marking Group (30 cases) and Six-Point Marking Group (30 cases), which adopted the traditional three-point and new six-point marking methodology respectively for placement. With application of accelerators, the radiation ifeld veriifcation iflms were taken pre-operatively by EPID (Electronic Portal Imaging Device) for each group and compared with BEV (Beam-ifeld Equation Vision) iflms generated by the planning system. The placement errors in directions of X (left and right), Y (head and feet) and Z (abdomen and back) were calculated.Results No statistically significant differences were seen in placement errors in the direction of Z between Three-Point Marking Group and Six-Point Marking Group (P>0.05), indicating that six-point marking methodology could not reduce the placement errors in the direction of back and abdomen. While, statistically signiifcant differences existed in placement errors in the direction of X and Y between two groups (bothP<0.05), indicating that six-point marking methodology could reduce the placement errors in the direction of the left side, right side, head and feet. Conclusion Six-point marking methodology demonstrated its easy-to-operate features in remarkable improvement of the accuracy of radiotherapy placement for pelvic cancers, which deserved wider clinical promotion.