CAJ | 학술논문

目的探讨鼻咽癌精确放射治疗过程中的摆位误差.方法应用电子射野影像系统(EP-ID)拍摄的验证片与计划系统所形成的数字重建射线影像(DRR)进行比较.结果 3个方向的摆位误差平均值分别为x轴(左右方向)(1.15±0.4)mm,Y轴(头脚方向)(1.35±0.6)mm和z轴(前后方向)(0.34±0.2)mm,摆位偏差主要发生在x、Y方向.所发生的误差在允许范围内,且治疗期间的摆位误差无显著差异.结论鼻咽癌精确放疗时采用头颈肩网膜体位固定技术,可提高摆位精度,确保治疗效果.
목적탐토비인암정학방사치료과정중적파위오차.방법응용전자사야영상계통(EP-ID)박섭적험증편여계화계통소형성적수자중건사선영상(DRR)진행비교.결과 3개방향적파위오차평균치분별위x축(좌우방향)(1.15±0.4)mm,Y축(두각방향)(1.35±0.6)mm화z축(전후방향)(0.34±0.2)mm,파위편차주요발생재x、Y방향.소발생적오차재윤허범위내,차치료기간적파위오차무현저차이.결론비인암정학방료시채용두경견망막체위고정기술,가제고파위정도,학보치료효과.
Objective To inquire into the set-up errors in precise radiotherapy for nasopharyngeal car-cinoma (NPC). Methods Comparing the verified image which were recorded using the electronicportal ima-ging device (EPID) with the digitally reconstructed rediograph DRR. Results The average value of set-up er-rors in three directions was (1.15±0.4) mm in the left-right (x) direction, (1.35±0.5)mm in the superior-in-ferior(y) direction and (0.34±0.2)mm in the anterior-posterior (z) direction. The set-up deviations occurred mainly in x and Y directions. The set-up error in precise radiotherapy for NPC is acceptable, and also the set-up error is no significant difference during the radiotherapy. Conclusion Using head, neck and shoulder netted model in precise radiotherapy for nasopharyngeal carcinoma (NPC) may improve the precision of set-up and en-sure the therapeutic effect.