3种组织补偿技术在乳腺癌切线放疗中的优劣比较  

Comparison of Physical Wedge,Dynamic Wedge and IMRT When Used for Compensation of Breast Cancer Treatment

作　　者：李承军[1] 

机构地区：[1]武汉大学人民医院肿瘤中心,武汉430060

出　　处：《医疗卫生装备》2013年第1期114-115,共2页Chinese Medical Equipment Journal

摘　　要：目的:比较乳腺癌切线照射时物理楔形板、动态楔形及动态调强3种组织补偿形式的优劣。方法:使用材料为瓦里安eclipse 8.1治疗计划系统,瓦里安23EX直线加速器6 MV X线。选择乳腺癌切线野照射患者,物理楔形板、动态楔形分别选择相同并合适的楔形角度,动态调强逆向优化参数靶区0%体积42 Gy,100%体积40 Gy。记录比较所需机器跳数及靶区的均匀性。结果:100%靶区体积40 Gy,3种情况下,45°和30°物理楔形板所需机器跳数最大,分别为510 MU和430 MU,15°动态楔形所需机器跳数最小,为239 MU。15°物理楔形板和动态楔形靶区最大剂量分别为46.3 Gy和45.5 Gy,均匀性较好。结论:动态楔形靶区均匀性略差于动态调强模式,但较物理楔形板好,而其所需的机器跳数则明显低于动态调强模式和物理楔形板模式。综合考虑,建议乳腺癌切线照射时使用动态楔形作组织补偿。Objective To compare the monitor units and uniformity of plans in which three kinds of compensating methods are employed. Methods Varian eclipse treatment planning system and 23EX linear accelerator were employed. Patients with breast cancer were chosen to make several two-tangential-fields plans which involved in physical wedge, dynamic wedge and sliding window IMRT, respectively, Results All plans were prescribed 40 Gy for 100% volume. The monitor units for 30 and 45 physical wedge were 430 MU and 510 MU, while for 15 dynamic wedge was 239 MU. The Dmax for 15 physical and dynamic wedge plans were 46.3 Gy and 45.5 Gy, so they had a better uniformity. Conclusion Dynanfic wedge is the best compensation model for breast cancer treatment considering of the monitor unit and uniformity. [Chinese Medical Equipment Journal,2013,34（1 ） ：114-115]

关 键 词：切线照射野 乳腺癌 动态楔形 物理楔形板 动态调强 均匀性 

分 类 号：R737.9[医药卫生—肿瘤]