CAJ | 학술논문

目的分析基于头颈肩热甥膜固定的鼻咽癌患者调强放射治疗中分次治疗内的误差.方法选取50例采用头颈肩热塑膜固定的鼻咽癌调强放射治疗的患者,于摆位后及治疗结束后,采用电子射野影像系统拍摄治疗摆位点的正位(机架角度0°)、侧位(机架角度90°)验证片,通过MOSAIQ系统的匹配功能,将获取的图像进行匹配,获得治疗摆位点在左右(X)、头脚(Y)、前后(Z)3个方向的位移.结果 50例患者的治疗时间为( 16.53±0.52) min；所有患者共进行了300次的摆位点验证匹配,其中X、Y、Z 三维方向分次间治疗摆位点位移分别为(0.45±0.32)mm、( 0.72±0.46 )mm和(0.63±0.45) mm.结论采用头颈肩热甥膜固定的鼻咽癌患者在调强放射治疗中分次治疗内的治疗摆位误差虽然较小,但在设计时,对PTV的摆位扩边应予以考虑.
목적 분석기우두경견열생막고정적비인암환자조강방사치료중분차치료내적오차.방법 선취50례채용두경견열소막고정적비인암조강방사치료적환자,우파위후급치료결속후,채용전자사야영상계통박섭치료파위점적정위(궤가각도0°)、측위(궤가각도90°)험증편,통과MOSAIQ계통적필배공능,장획취적도상진행필배,획득치료파위점재좌우(X)、두각(Y)、전후(Z)3개방향적위이.결과 50례환자적치료시간위( 16.53±0.52) min；소유환자공진행료300차적파위점험증필배,기중X、Y、Z 삼유방향분차간치료파위점위이분별위(0.45±0.32)mm、( 0.72±0.46 )mm화(0.63±0.45) mm.결론 채용두경견열생막고정적비인암환자재조강방사치료중분차치료내적치료파위오차수연교소,단재설계시,대PTV적파위확변응여이고필.
Objective To analyze the intrafractional set-up errors in intensity modulated radiation therapy ( IMBT )for nasopharyngeal carcinoma based on head-,neck- and -shoulder thermal model.Methods 50 patients with nasopharyngeal carcinoma received IMRT using head-,neck- and -shoulder thermal model.The films on the position of set-up with the anteroposterior ( gantry angle of 0 degrees )and lateral( gantry angle 90 degrees )position were taken after the patients were positioned and administered treatment.The setup errors on X,Y,and Z axes were analyzed with the MOSAIQ system.Results The average duration of treatment for the 50 patients was ( 16.53 + 0.52 ) min.A total of 600films were taken on 50 patients.The intrafraetional setup errors on X,Y and Z axes were ( 0.45 ± 0.32 ) mm,( 0.72 ±0.46 ) mm,and ( 0.63 ± 0.45 ) mm,respectively.Conclusions Although intrafractional setup error in IMRT for nasopharyngeal carcinoma based on head-,neck- and -shoulder thermal model is small,it should be taken into account in deciding the clinical margin of PTV.