Optimal setting of multileaf collimators in stationary beam radiation therapy.
Optimal setting of multileaf collimators in stationary beam radiation therapy.
复制标题
固定束放射治疗中多叶准直器的最佳设置。
DOI：
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发表时间：
1988
期刊：
影响因子：
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通讯作者：
Anders Brahme
中科院分区：
文献类型：
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作者：
Anders Brahme
新一代高分辨率双聚焦多叶准直器是迈向真正三维放射治疗技术的重要一步。主要优点包括使用静态辐射场的射束成形和剂量输送的灵活性增加，以及在每个CT切片和横向剂量计划中使用动态计算机控制的患者个体准直进行构象治疗的可能性。除了提高效率和灵活性，减少设置时间，它表明，多叶准直往往会减少治疗体积高达20%或更多的单字段和30%以上时，使用多个字段，而不是普通的矩形字段。当与传统的梁块相比时，更大的简单性和灵活性可能会以大约相同的百分比增加个性化块的使用。静态辐射场的多叶准直器的最佳旋转和设置推导出凸和凸凹目标体积。通常，靶的最小横截面或直径应与叶片的运动方向对齐。
The new generation of high resolution double focused multileaf collimators is an important step towards true three-dimensional radiation treatment techniques. The principal advantages include increased flexibility in beam shaping and dose delivery using static radiation fields as well as the possibility to do conformation therapy employing dynamic computer controlled patient individual collimation in each CT slice and lateral dose plan. Beside the increased efficiency and flexibility and reduced set-up time, it is shown that multileaf collimation will often reduce the treated volume by as much as 20% or more in single fields and more than 30% when multiple fields are used instead of ordinary rectangular fields. When compared to conventional beam blocks the greater simplicity and flexibility will probably increase the use of individualized blockings by about the same percentages. The optimal rotation and setting of a multileaf collimator for static radiation fields is derived both for convex and for convex concave target volumes. Generally, the smallest cross-section or diameter of the target should be aligned with the direction of motion of the leaves.