乳腺托架与体膜联合固定在乳腺癌保乳术后放疗中的应用  

Application of joint fixation with breast bracket and body phantom to breast cancer radiotherapy after breast-conserving operation

作　　者：叶森林[1] 王志令[1] 梁廷[1] 

机构地区：[1]重庆医科大学附属第一医院肿瘤科放疗中心,重庆400016

出　　处：《医疗卫生装备》2015年第5期79-81,共3页Chinese Medical Equipment Journal

摘　　要：目的:探讨乳腺托架与体膜联合固定在乳腺癌保乳术后放疗中的应用。方法:选取36例乳腺癌保乳术后患者,用乳腺托架与体膜联合固定,在放疗前应用机载影像系统(on board imager,OBI)获取锥形束CT(cone beam CT,CBCT)图像,用CBCT图像和计划CT图像匹配得出二者间的误差值。结果:左右(X)、头脚(Y)、腹背(Z)3个方向的摆位误差分别为(2.6±0.783)、(3.0±1.027)、(1.6±0.872)mm,摆位误差>5 mm的百分率分别为16.5%、20.7%、9.1%。结论:乳腺癌保乳术后放疗使用乳腺托架与体膜联合固定可以起到很好的固定作用,尤其在Z轴(腹背方向)可明显减少摆位误差,有很好的临床应用价值。Objective To apply joint fixation with breast bracket and body phantom to breast cancer radiotherapy after breast-conserving operation. Methods Totally 36 patients after breast-conserving operation underwent joint fixation with breast bracket and body phantom, whose cone beam computed tomography（CBCT） images were obtained with on board imager（OBI） before radiotherapy. The errors between the CBCT images and planning CT images were acquired by matching. Results The setup errors in the directions of left-right（X）, head-foot（Y） and belly-back（Z） were（2.6±0.783）,（3.0±1.027） and（1.6 ±0.872）mm respectively, and the percentages that the setup errors were more than 5 mm were 16.5%,20.7% and 9.1% respectively. Conclusion Joint fixation with breast bracket and body phantom may decrease the setup error in radiotherapy after breast-conserving operation, especially in the belly-back direction, and thus has high clinical values.

关 键 词：乳腺癌 乳腺托架 摆位误差 

分 类 号：R737.9[医药卫生—肿瘤] R730.55[医药卫生—临床医学]