GENERATION OF ARBITRARY INTENSITY PROFILES BY DYNAMIC JAWS OR MULTILEAF COLLIMATORS
GENERATION OF ARBITRARY INTENSITY PROFILES BY DYNAMIC JAWS OR MULTILEAF COLLIMATORS
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DOI：
10.1118/1.597345
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发表时间：
1994-07-01
期刊：
影响因子：
3.8
通讯作者：
CHUI, CS
中科院分区：
文献类型：
--
作者：
SPIROU, SV;CHUI, CS
提出了一种计算准直器钳口运动的算法，该运动是产生给定的任意强度分布所需的。假设强度分布是分段线性的，即，由直线段组成。在辐射输送期间，钳口以可变速度单向连续移动。在每个段期间，至少一个夹爪被设置为以最大允许速度移动。该算法同样适用于多叶准直器（MLC），其中通过准直器叶的传输被考虑在内。不同的强度配置文件与不同程度的复杂性的例子。通常，在VAX 8550计算机上计算所需时间小于10 ms。
An algorithm, which calculates the motions of the collimator jaws required to generate a given arbitrary intensity profile, is presented. The intensity profile is assumed to be piecewise linear, i.e., to consist of segments of straight lines. The jaws move unidirectionally and continuously with variable speed during radiation delivery. During each segment, at least one of the jaws is set to move at the maximum permissible speed. The algorithm is equally applicable for multileaf collimators (MLC), where the transmission through the collimator leaves is taken into account. Examples are presented for different intensity profiles with varying degrees of complexity. Typically, the calculation takes less than 10 ms on a VAX 8550 computer.