摘要
目的:比较放射治疗摆位中组织补偿膜不同使用方式引起的摆位误差。方法:选取医院收治的40例调强放射治疗(IMRT)中需要使用组织补偿膜的患者,对其进行测量体表温度并记录,使用组织补偿膜时采用加温和不加温两种方式进行。加温方式时组织补偿膜于使用前加温至患者体表温度;不加温方式则采用直接使用组织补偿膜。每例患者治疗开始,以组织补偿膜于使用前不加温和加温的方式各摆位后进行锥形束CT(CBCT)扫描并记录每次扫描的误差。每例患者整个疗程两种方式各进行5次CBCT扫描,并记录每例患者得到的5次两种方式误差数据,40例患者共得到加温和不加温误差各200组数据。每例患者最后一次治疗完成后对两种方式进行1~10分的舒适度评分,40例患者两种使用方式各得40次评分。分析组织补偿膜于使用前不加温和加温的两种方式引起的摆位误差数据及舒适度评分数据。结果:不加温方式在X轴、Y轴和Z轴3个方向的平移误差分别为(1.80±1.18)mm、(2.06±1.29)mm和(1.28±1.04)mm;旋转误差分别为(0.95±0.64)°、(0.68±0.47)°和(0.63±0.43)°;舒适度评分[4.25(5.00,5.00)]分。加温方式在X轴、Y轴和Z轴3个方向的平移误差分别为(1.22±0.86)mm、(1.64±1.17)mm和(1.20±1.03)mm;旋转误差分别为(0.71±0.50)°、(0.60±0.45)°和(0.68±0.45)°;舒适度评分[9.00(8.00,10.00)]分。两种方式在X轴、Y轴平移及X轴旋转方向误差比较差异有统计学意义(t=-5.386,t=-3.435,t=-4.208;P<0.05)。舒适度评分对比,加温方式高于不加温方式,且差异具有统计学意义(Z=-5.361,P<0.05)。结论:采用组织补偿膜加温方式摆位误差明显优于不加温使用方式,能提高摆位精度且患者舒适度好,更符合放射治疗规范。
Objective:To compare the setup error caused by different ways of bolus in the setup error of radiotherapy.Methods:40 patients who needed bolus in intensity modulated radiation therapy(IMRT)were selected and their body temperatures were measured and recorded.Bolus was used in two ways:Non-heating and heating before it was putted on the patients.In heating mode,bolus was heated up to the body temperature before was used.In non-heating mode:bolus was directly used.At the beginning of treatment,each patient was scanned by cone beam computed tomography(CBCT)post each setup in the mode of no heating and heating before bolus was used,and the error of each scan was recorded.During the whole treatment,5 CBCT scans were performed in each mode,and error data of two modes of 5 times of each patient were recorded.There were 200 data of heating and 200 data of no-heating of 40 patients were obtained.After the last treatment of each patient,the comfort score with 1-10 points of the two methods was implemented for each patient,and the scores of 40 times of the two methods of 40 patients were obtained.The data of setup error and the scores of comfort level caused by two kinds of use modes were analyzed.Results:The motion errors of non-heating mode at three directions of X,Y and Z axes were respectively(1.80±1.18)mm,(2.06±1.29)mm and(1.28±1.04)mm,and the rotation error of that were respectively(0.95±0.64)°,(0.68±0.47)°and(0.63±0.43)°,and the scores of comfort level of that was[4.25(5.00,5.00)].And the motion errors of heating mode at three directions of X,Y and Z axes were respectively(1.22±0.86)mm,(1.64±1.17)mm and(1.20±1.03)mm,and the rotation error of that were respectively(0.71±0.50)°,(0.60±0.45)°and(0.68±0.45)°,and the scores of comfort level of that was[9.00(8.00,10.00)].There were significant differences between the two methods at motion errors of x-axis and Y-axis,and rotation error of X-axis(t=-5.386,t=-3.435,t=-4.208,P<0.05).For the comparison of comfort level,the scores of heating mode was significantly higher than that of no-heating mode(Z=-5.361,P<0.05).Conclusion:The setup error of bolus of heating mode is obviously better than that of non-heating mode,and it can improve the setup accuracy and the comfort level of patients,and it is more conform to the standards of radiotherapy.
作者
吴舒鑫
郑祖安
付秀根
肖志平
李庆
WU Shu-xin;ZHENG Zu-an;FU Xiu-gen(Department of Oncology,Tongji Hospital,Tongji Medical College of Huazhong University of Science and Technology,Wuhan 430030,China;不详)
出处
《中国医学装备》
2020年第5期80-83,共4页
China Medical Equipment
