Helyer S J, Heisig S
Department of Radiotherapy, Royal Marsden Hospital, Sutton, UK.
Radiother Oncol. 1995 Oct;37(1):61-4. doi: 10.1016/0167-8140(95)01616-o.
The work processes for the planning and delivery of shaped beams using a Philips multileaf collimator were studied for two treatment techniques and compared to those for conventional shielding blocks. The MLC proved faster in all cases of treatment delivery providing time reductions of 19-48% for parallel opposed beams and 6-44% for conformal isocentric beams. The workload in the mould room and workshop would be reduced if multileaf collimation is used. Time spent manufacturing and mounting blocks (average 2 h 30 min and 37 min, respectively) is eliminated for the techniques studied. The physics process for generating conformal MLC beams proved faster (average 1 h 36 min) than for blocks (average 2 h 30 min); this was not so for parallel opposed beams. Overall the results suggest that using the MLC is a time- and resource-saving alternative to blocks.
使用飞利浦多叶准直器进行成形束的计划和投照的工作流程，针对两种治疗技术进行了研究，并与传统屏蔽挡块的流程进行了比较。在所有治疗投照情况下，多叶准直器都被证明速度更快，对于平行对置野，时间减少了19% - 48%，对于适形等中心野，时间减少了6% - 44%。如果使用多叶准直，模具室和车间的工作量将会减少。对于所研究的技术，制造和安装挡块所花费的时间（分别平均为2小时30分钟和37分钟）被消除了。事实证明，生成适形多叶准直器束的物理过程（平均1小时36分钟）比挡块的过程（平均2小时30分钟）更快；对于平行对置野则并非如此。总体而言，结果表明使用多叶准直器相对于挡块是一种节省时间和资源的选择。
